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-rw-r--r--erts/lib_src/common/erl_misc_utils.c179
-rw-r--r--erts/lib_src/common/ethr_aux.c762
-rw-r--r--erts/lib_src/common/ethr_cbf.c36
-rw-r--r--erts/lib_src/common/ethr_mutex.c2758
-rw-r--r--erts/lib_src/common/ethread.c3369
5 files changed, 3713 insertions, 3391 deletions
diff --git a/erts/lib_src/common/erl_misc_utils.c b/erts/lib_src/common/erl_misc_utils.c
index f70db86960..d2ef7140a5 100644
--- a/erts/lib_src/common/erl_misc_utils.c
+++ b/erts/lib_src/common/erl_misc_utils.c
@@ -59,8 +59,25 @@
# endif
#endif
-#ifdef HAVE_SCHED_xETAFFINITY
+#if defined(HAVE_SCHED_xETAFFINITY)
# include <sched.h>
+# define ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__
+#define ERTS_MU_GET_PROC_AFFINITY__(CPUINFOP) \
+ (sched_getaffinity((CPUINFOP)->pid, \
+ sizeof(cpu_set_t), \
+ &(CPUINFOP)->cpuset) != 0 ? -errno : 0)
+#define ERTS_MU_SET_THR_AFFINITY__(SETP) \
+ (sched_setaffinity(0, sizeof(cpu_set_t), (SETP)) != 0 ? -errno : 0)
+#elif defined(__WIN32__)
+# define ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__
+# define cpu_set_t DWORD
+# define CPU_SETSIZE (sizeof(DWORD)*8)
+# define CPU_ZERO(SETP) (*(SETP) = (DWORD) 0)
+# define CPU_SET(CPU, SETP) (*(SETP) |= (((DWORD) 1) << (CPU)))
+# define CPU_CLR(CPU, SETP) (*(SETP) &= ~(((DWORD) 1) << (CPU)))
+# define CPU_ISSET(CPU, SETP) ((*(SETP) & (((DWORD) 1) << (CPU))) != (DWORD) 0)
+#define ERTS_MU_GET_PROC_AFFINITY__ get_proc_affinity
+#define ERTS_MU_SET_THR_AFFINITY__ set_thr_affinity
#endif
#ifdef HAVE_PSET_INFO
# include <sys/pset.h>
@@ -105,25 +122,58 @@ struct erts_cpu_info_t_ {
int available;
int topology_size;
erts_cpu_topology_t *topology;
-#if defined(HAVE_SCHED_xETAFFINITY)
+#if defined(ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__)
char *affinity_str;
char affinity_str_buf[CPU_SETSIZE/4+2];
cpu_set_t cpuset;
+#if defined(HAVE_SCHED_xETAFFINITY)
pid_t pid;
+#endif
#elif defined(HAVE_PSET_INFO)
processorid_t *cpuids;
#endif
};
+#if defined(__WIN32__)
+
+static __forceinline int
+get_proc_affinity(erts_cpu_info_t *cpuinfo)
+{
+ DWORD pamask, samask;
+ if (GetProcessAffinityMask(GetCurrentProcess(), &pamask, &samask)) {
+ cpuinfo->cpuset = (cpu_set_t) pamask;
+ return 0;
+ }
+ else {
+ cpuinfo->cpuset = (cpu_set_t) 0;
+ return -erts_get_last_win_errno();
+ }
+}
+
+static __forceinline int
+set_thr_affinity(cpu_set_t *set)
+{
+ if (*set == (cpu_set_t) 0)
+ return -ENOTSUP;
+ if (SetThreadAffinityMask(GetCurrentThread(), *set) == 0)
+ return -erts_get_last_win_errno();
+ else
+ return 0;
+}
+
+#endif
+
erts_cpu_info_t *
erts_cpu_info_create(void)
{
erts_cpu_info_t *cpuinfo = malloc(sizeof(erts_cpu_info_t));
if (!cpuinfo)
return NULL;
-#if defined(HAVE_SCHED_xETAFFINITY)
+#if defined(ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__)
cpuinfo->affinity_str = NULL;
+#if defined(HAVE_SCHED_xETAFFINITY)
cpuinfo->pid = getpid();
+#endif
#elif defined(HAVE_PSET_INFO)
cpuinfo->cpuids = NULL;
#endif
@@ -162,10 +212,13 @@ erts_cpu_info_update(erts_cpu_info_t *cpuinfo)
#ifdef __WIN32__
{
+ int i;
SYSTEM_INFO sys_info;
GetSystemInfo(&sys_info);
cpuinfo->configured = (int) sys_info.dwNumberOfProcessors;
-
+ for (i = 0; i < sizeof(DWORD)*8; i++)
+ if (sys_info.dwActiveProcessorMask & (((DWORD) 1) << i))
+ cpuinfo->online++;
}
#elif !defined(NO_SYSCONF) && (defined(_SC_NPROCESSORS_CONF) \
|| defined(_SC_NPROCESSORS_ONLN))
@@ -205,8 +258,8 @@ erts_cpu_info_update(erts_cpu_info_t *cpuinfo)
if (cpuinfo->online > cpuinfo->configured)
cpuinfo->online = cpuinfo->configured;
-#ifdef HAVE_SCHED_xETAFFINITY
- if (sched_getaffinity(cpuinfo->pid, sizeof(cpu_set_t), &cpuinfo->cpuset) == 0) {
+#if defined(ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__)
+ if (ERTS_MU_GET_PROC_AFFINITY__(cpuinfo) == 0) {
int i, c, cn, si;
c = cn = 0;
si = sizeof(cpuinfo->affinity_str_buf) - 1;
@@ -289,7 +342,7 @@ erts_get_cpu_available(erts_cpu_info_t *cpuinfo)
char *
erts_get_unbind_from_cpu_str(erts_cpu_info_t *cpuinfo)
{
-#if defined(HAVE_SCHED_xETAFFINITY)
+#if defined(ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__)
if (!cpuinfo)
return "false";
return cpuinfo->affinity_str;
@@ -303,7 +356,7 @@ erts_get_available_cpu(erts_cpu_info_t *cpuinfo, int no)
{
if (!cpuinfo || no < 1 || cpuinfo->available < no)
return -EINVAL;
-#ifdef HAVE_SCHED_xETAFFINITY
+#if defined(ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__)
{
cpu_set_t *allowed = &cpuinfo->cpuset;
int ix, n;
@@ -335,8 +388,8 @@ int
erts_is_cpu_available(erts_cpu_info_t *cpuinfo, int id)
{
if (cpuinfo && 0 <= id) {
-#ifdef HAVE_SCHED_xETAFFINITY
- if (id <= CPU_SETSIZE)
+#if defined(ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__)
+ if (id < CPU_SETSIZE)
return CPU_ISSET(id, &cpuinfo->cpuset);
#elif defined(HAVE_PROCESSOR_BIND)
int no;
@@ -388,7 +441,7 @@ erts_bind_to_cpu(erts_cpu_info_t *cpuinfo, int cpu)
*/
if (!cpuinfo)
return -EINVAL;
-#ifdef HAVE_SCHED_xETAFFINITY
+#if defined(ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__)
{
cpu_set_t bind_set;
if (cpu < 0)
@@ -398,9 +451,7 @@ erts_bind_to_cpu(erts_cpu_info_t *cpuinfo, int cpu)
CPU_ZERO(&bind_set);
CPU_SET(cpu, &bind_set);
- if (sched_setaffinity(0, sizeof(cpu_set_t), &bind_set) != 0)
- return -errno;
- return 0;
+ return ERTS_MU_SET_THR_AFFINITY__(&bind_set);
}
#elif defined(HAVE_PROCESSOR_BIND)
if (cpu < 0)
@@ -418,10 +469,8 @@ erts_unbind_from_cpu(erts_cpu_info_t *cpuinfo)
{
if (!cpuinfo)
return -EINVAL;
-#if defined(HAVE_SCHED_xETAFFINITY)
- if (sched_setaffinity(0, sizeof(cpu_set_t), &cpuinfo->cpuset) != 0)
- return -errno;
- return 0;
+#if defined(ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__)
+ return ERTS_MU_SET_THR_AFFINITY__(&cpuinfo->cpuset);
#elif defined(HAVE_PROCESSOR_BIND)
if (processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL) != 0)
return -errno;
@@ -434,7 +483,7 @@ erts_unbind_from_cpu(erts_cpu_info_t *cpuinfo)
int
erts_unbind_from_cpu_str(char *str)
{
-#if defined(HAVE_SCHED_xETAFFINITY)
+#if defined(ERTS_HAVE_MISC_UTIL_AFFINITY_MASK__)
char *c = str;
int cpus = 0;
int shft = 0;
@@ -486,9 +535,7 @@ erts_unbind_from_cpu_str(char *str)
if (!cpus)
return -EINVAL;
- if (sched_setaffinity(0, sizeof(cpu_set_t), &cpuset) != 0)
- return -errno;
- return 0;
+ return ERTS_MU_SET_THR_AFFINITY__(&cpuset);
#elif defined(HAVE_PROCESSOR_BIND)
if (processor_bind(P_LWPID, P_MYID, PBIND_NONE, NULL) != 0)
return -errno;
@@ -965,3 +1012,91 @@ read_topology(erts_cpu_info_t *cpuinfo)
}
#endif
+
+#if defined(__WIN32__)
+
+int
+erts_get_last_win_errno(void)
+{
+ switch (GetLastError()) {
+ case ERROR_INVALID_FUNCTION: return EINVAL; /* 1 */
+ case ERROR_FILE_NOT_FOUND: return ENOENT; /* 2 */
+ case ERROR_PATH_NOT_FOUND: return ENOENT; /* 3 */
+ case ERROR_TOO_MANY_OPEN_FILES: return EMFILE; /* 4 */
+ case ERROR_ACCESS_DENIED: return EACCES; /* 5 */
+ case ERROR_INVALID_HANDLE: return EBADF; /* 6 */
+ case ERROR_ARENA_TRASHED: return ENOMEM; /* 7 */
+ case ERROR_NOT_ENOUGH_MEMORY: return ENOMEM; /* 8 */
+ case ERROR_INVALID_BLOCK: return ENOMEM; /* 9 */
+ case ERROR_BAD_ENVIRONMENT: return E2BIG; /* 10 */
+ case ERROR_BAD_FORMAT: return ENOEXEC; /* 11 */
+ case ERROR_INVALID_ACCESS: return EINVAL; /* 12 */
+ case ERROR_INVALID_DATA: return EINVAL; /* 13 */
+ case ERROR_OUTOFMEMORY: return ENOMEM; /* 14 */
+ case ERROR_INVALID_DRIVE: return ENOENT; /* 15 */
+ case ERROR_CURRENT_DIRECTORY: return EACCES; /* 16 */
+ case ERROR_NOT_SAME_DEVICE: return EXDEV; /* 17 */
+ case ERROR_NO_MORE_FILES: return ENOENT; /* 18 */
+ case ERROR_WRITE_PROTECT: return EACCES; /* 19 */
+ case ERROR_BAD_UNIT: return EACCES; /* 20 */
+ case ERROR_NOT_READY: return EACCES; /* 21 */
+ case ERROR_BAD_COMMAND: return EACCES; /* 22 */
+ case ERROR_CRC: return EACCES; /* 23 */
+ case ERROR_BAD_LENGTH: return EACCES; /* 24 */
+ case ERROR_SEEK: return EACCES; /* 25 */
+ case ERROR_NOT_DOS_DISK: return EACCES; /* 26 */
+ case ERROR_SECTOR_NOT_FOUND: return EACCES; /* 27 */
+ case ERROR_OUT_OF_PAPER: return EACCES; /* 28 */
+ case ERROR_WRITE_FAULT: return EACCES; /* 29 */
+ case ERROR_READ_FAULT: return EACCES; /* 30 */
+ case ERROR_GEN_FAILURE: return EACCES; /* 31 */
+ case ERROR_SHARING_VIOLATION: return EACCES; /* 32 */
+ case ERROR_LOCK_VIOLATION: return EACCES; /* 33 */
+ case ERROR_WRONG_DISK: return EACCES; /* 34 */
+ case ERROR_SHARING_BUFFER_EXCEEDED: return EACCES; /* 36 */
+ case ERROR_BAD_NETPATH: return ENOENT; /* 53 */
+ case ERROR_NETWORK_ACCESS_DENIED: return EACCES; /* 65 */
+ case ERROR_BAD_NET_NAME: return ENOENT; /* 67 */
+ case ERROR_FILE_EXISTS: return EEXIST; /* 80 */
+ case ERROR_CANNOT_MAKE: return EACCES; /* 82 */
+ case ERROR_FAIL_I24: return EACCES; /* 83 */
+ case ERROR_INVALID_PARAMETER: return EINVAL; /* 87 */
+ case ERROR_NO_PROC_SLOTS: return EAGAIN; /* 89 */
+ case ERROR_DRIVE_LOCKED: return EACCES; /* 108 */
+ case ERROR_BROKEN_PIPE: return EPIPE; /* 109 */
+ case ERROR_DISK_FULL: return ENOSPC; /* 112 */
+ case ERROR_INVALID_TARGET_HANDLE: return EBADF; /* 114 */
+ case ERROR_WAIT_NO_CHILDREN: return ECHILD; /* 128 */
+ case ERROR_CHILD_NOT_COMPLETE: return ECHILD; /* 129 */
+ case ERROR_DIRECT_ACCESS_HANDLE: return EBADF; /* 130 */
+ case ERROR_NEGATIVE_SEEK: return EINVAL; /* 131 */
+ case ERROR_SEEK_ON_DEVICE: return EACCES; /* 132 */
+ case ERROR_DIR_NOT_EMPTY: return ENOTEMPTY;/* 145 */
+ case ERROR_NOT_LOCKED: return EACCES; /* 158 */
+ case ERROR_BAD_PATHNAME: return ENOENT; /* 161 */
+ case ERROR_MAX_THRDS_REACHED: return EAGAIN; /* 164 */
+ case ERROR_LOCK_FAILED: return EACCES; /* 167 */
+ case ERROR_ALREADY_EXISTS: return EEXIST; /* 183 */
+ case ERROR_INVALID_STARTING_CODESEG: return ENOEXEC; /* 188 */
+ case ERROR_INVALID_STACKSEG: return ENOEXEC; /* 189 */
+ case ERROR_INVALID_MODULETYPE: return ENOEXEC; /* 190 */
+ case ERROR_INVALID_EXE_SIGNATURE: return ENOEXEC; /* 191 */
+ case ERROR_EXE_MARKED_INVALID: return ENOEXEC; /* 192 */
+ case ERROR_BAD_EXE_FORMAT: return ENOEXEC; /* 193 */
+ case ERROR_ITERATED_DATA_EXCEEDS_64k: return ENOEXEC; /* 194 */
+ case ERROR_INVALID_MINALLOCSIZE: return ENOEXEC; /* 195 */
+ case ERROR_DYNLINK_FROM_INVALID_RING: return ENOEXEC; /* 196 */
+ case ERROR_IOPL_NOT_ENABLED: return ENOEXEC; /* 197 */
+ case ERROR_INVALID_SEGDPL: return ENOEXEC; /* 198 */
+ case ERROR_AUTODATASEG_EXCEEDS_64k: return ENOEXEC; /* 199 */
+ case ERROR_RING2SEG_MUST_BE_MOVABLE: return ENOEXEC; /* 200 */
+ case ERROR_RELOC_CHAIN_XEEDS_SEGLIM: return ENOEXEC; /* 201 */
+ case ERROR_INFLOOP_IN_RELOC_CHAIN: return ENOEXEC; /* 202 */
+ case ERROR_FILENAME_EXCED_RANGE: return ENOENT; /* 206 */
+ case ERROR_NESTING_NOT_ALLOWED: return EAGAIN; /* 215 */
+ case ERROR_NOT_ENOUGH_QUOTA: return ENOMEM; /* 1816 */
+ default: return EINVAL;
+ }
+}
+
+#endif
diff --git a/erts/lib_src/common/ethr_aux.c b/erts/lib_src/common/ethr_aux.c
new file mode 100644
index 0000000000..4db4cffd3a
--- /dev/null
+++ b/erts/lib_src/common/ethr_aux.c
@@ -0,0 +1,762 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2010. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+/*
+ * Description: A Thread library for use in the ERTS and other OTP
+ * applications.
+ * Author: Rickard Green
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+
+#define ETHR_INLINE_FUNC_NAME_(X) X ## __
+#define ETHR_AUX_IMPL__
+
+#include "ethread.h"
+#include "ethr_internal.h"
+#include <string.h>
+#include <limits.h>
+
+#ifndef __WIN32__
+#include <unistd.h>
+#endif
+
+#define ERTS_TS_EV_ALLOC_DEFAULT_POOL_SIZE 100
+#define ERTS_TS_EV_ALLOC_POOL_SIZE 25
+
+erts_cpu_info_t *ethr_cpu_info__;
+
+int ethr_not_completely_inited__ = 1;
+int ethr_not_inited__ = 1;
+
+ethr_memory_allocators ethr_mem__ = ETHR_MEM_ALLOCS_DEF_INITER__;
+
+#ifndef ETHR_HAVE_OPTIMIZED_ATOMIC_OPS
+ethr_atomic_protection_t ethr_atomic_protection__[1 << ETHR_ATOMIC_ADDR_BITS];
+#endif
+
+void *(*ethr_thr_prepare_func__)(void) = NULL;
+void (*ethr_thr_parent_func__)(void *) = NULL;
+void (*ethr_thr_child_func__)(void *) = NULL;
+
+typedef struct ethr_xhndl_list_ ethr_xhndl_list;
+struct ethr_xhndl_list_ {
+ ethr_xhndl_list *next;
+ void (*funcp)(void);
+};
+
+size_t ethr_pagesize__;
+size_t ethr_min_stack_size__; /* kilo words */
+size_t ethr_max_stack_size__; /* kilo words */
+
+ethr_rwmutex xhndl_rwmtx;
+ethr_xhndl_list *xhndl_list;
+
+static int main_threads;
+
+static int init_ts_event_alloc(void);
+
+int
+ethr_init_common__(ethr_init_data *id)
+{
+ int res;
+ if (id) {
+ ethr_thr_prepare_func__ = id->thread_create_prepare_func;
+ ethr_thr_parent_func__ = id->thread_create_parent_func;
+ ethr_thr_child_func__ = id->thread_create_child_func;
+ }
+
+ ethr_cpu_info__ = erts_cpu_info_create();
+ if (!ethr_cpu_info__)
+ return ENOMEM;
+
+#ifdef _SC_PAGESIZE
+ ethr_pagesize__ = (size_t) sysconf(_SC_PAGESIZE);
+#elif defined(HAVE_GETPAGESIZE)
+ ethr_pagesize__ = (size_t) getpagesize();
+#else
+ ethr_pagesize__ = (size_t) 4*1024; /* Guess 4 KB */
+#endif
+
+ /* User needs at least 4 KB */
+ ethr_min_stack_size__ = 4*1024;
+#if SIZEOF_VOID_P == 8
+ /* Double that on 64-bit archs */
+ ethr_min_stack_size__ *= 2;
+#endif
+ /* On some systems as much as about 4 KB is used by the system */
+ ethr_min_stack_size__ += 4*1024;
+ /* There should be room for signal handlers */
+#ifdef SIGSTKSZ
+ ethr_min_stack_size__ += SIGSTKSZ;
+#else
+ ethr_min_stack_size__ += ethr_pagesize__;
+#endif
+ /* The system may think that we need more stack */
+#if defined(PTHREAD_STACK_MIN)
+ if (ethr_min_stack_size__ < PTHREAD_STACK_MIN)
+ ethr_min_stack_size__ = PTHREAD_STACK_MIN;
+#elif defined(_SC_THREAD_STACK_MIN)
+ {
+ size_t thr_min_stk_sz = (size_t) sysconf(_SC_THREAD_STACK_MIN);
+ if (ethr_min_stack_size__ < thr_min_stk_sz)
+ ethr_min_stack_size__ = thr_min_stk_sz;
+ }
+#endif
+ /* The guard is at least on some platforms included in the stack size
+ passed when creating threads */
+#ifdef ETHR_STACK_GUARD_SIZE
+ ethr_min_stack_size__ += ETHR_STACK_GUARD_SIZE;
+#endif
+ ethr_min_stack_size__ = ETHR_PAGE_ALIGN(ethr_min_stack_size__);
+
+ ethr_min_stack_size__ = ETHR_B2KW(ethr_min_stack_size__);
+
+ ethr_max_stack_size__ = 32*1024*1024;
+#if SIZEOF_VOID_P == 8
+ ethr_max_stack_size__ *= 2;
+#endif
+ ethr_max_stack_size__ = ETHR_B2KW(ethr_max_stack_size__);
+
+#ifndef ETHR_HAVE_OPTIMIZED_ATOMIC_OPS
+ {
+ int i;
+ for (i = 0; i < (1 << ETHR_ATOMIC_ADDR_BITS); i++) {
+ res = ethr_spinlock_init(&ethr_atomic_protection__[i].u.lck);
+ if (res != 0)
+ return res;
+ }
+ }
+#endif
+
+ res = ethr_mutex_lib_init(erts_get_cpu_configured(ethr_cpu_info__));
+ if (res != 0)
+ return res;
+
+ xhndl_list = NULL;
+
+ return 0;
+}
+
+int
+ethr_late_init_common__(ethr_late_init_data *lid)
+{
+ ethr_ts_event *tsep = NULL;
+ int reader_groups;
+ int res;
+ int i;
+ ethr_memory_allocator *m[] = {&ethr_mem__.std,
+ &ethr_mem__.sl,
+ &ethr_mem__.ll};
+ if (lid)
+ ethr_mem__ = lid->mem;
+ if (!ethr_mem__.std.alloc
+ || !ethr_mem__.std.realloc
+ || !ethr_mem__.std.free) {
+ ethr_mem__.std.alloc = malloc;
+ ethr_mem__.std.realloc = realloc;
+ ethr_mem__.std.free = free;
+ }
+ for (i = 0; i < sizeof(m)/sizeof(m[0]); i++) {
+ if (!m[i]->alloc || !m[i]->realloc || !m[i]->free) {
+ m[i]->alloc = ethr_mem__.std.alloc;
+ m[i]->realloc = ethr_mem__.std.realloc;
+ m[i]->free = ethr_mem__.std.free;
+ }
+
+ }
+ res = init_ts_event_alloc();
+ if (res != 0)
+ return res;
+ res = ethr_make_ts_event__(&tsep);
+ if (res == 0)
+ tsep->iflgs |= ETHR_TS_EV_ETHREAD;
+ if (!lid) {
+ main_threads = 0;
+ reader_groups = 0;
+ }
+ else {
+ if (lid->main_threads < 0 || USHRT_MAX < lid->main_threads)
+ return res;
+ main_threads = lid->main_threads;
+ reader_groups = lid->reader_groups;
+ }
+ res = ethr_mutex_lib_late_init(reader_groups, main_threads);
+ if (res != 0)
+ return res;
+ ethr_not_completely_inited__ = 0; /* Need it for
+ rwmutex_init */
+ res = ethr_rwmutex_init(&xhndl_rwmtx);
+ ethr_not_completely_inited__ = 1;
+ if (res != 0)
+ return res;
+ return 0;
+}
+
+int
+ethr_install_exit_handler(void (*funcp)(void))
+{
+ ethr_xhndl_list *xhp;
+
+#if ETHR_XCHK
+ if (ethr_not_completely_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+#endif
+
+ if (!funcp)
+ return EINVAL;
+
+ xhp = (ethr_xhndl_list *) ethr_mem__.std.alloc(sizeof(ethr_xhndl_list));
+ if (!xhp)
+ return ENOMEM;
+
+ ethr_rwmutex_rwlock(&xhndl_rwmtx);
+
+ xhp->funcp = funcp;
+ xhp->next = xhndl_list;
+ xhndl_list = xhp;
+
+ ethr_rwmutex_rwunlock(&xhndl_rwmtx);
+
+ return 0;
+}
+
+void
+ethr_run_exit_handlers__(void)
+{
+ ethr_xhndl_list *xhp;
+
+ ethr_rwmutex_rlock(&xhndl_rwmtx);
+
+ xhp = xhndl_list;
+
+ ethr_rwmutex_runlock(&xhndl_rwmtx);
+
+ for (; xhp; xhp = xhp->next)
+ (*xhp->funcp)();
+}
+
+/*
+ * Thread specific event alloc, etc.
+ *
+ * Note that we don't know when it is safe to destroy an event, but
+ * we know when it is safe to reuse it. ts_event_free() therefore
+ * never destroys an event (but makes freed events available for
+ * reuse).
+ *
+ * We could easily keep track of the usage of events, and by this
+ * make it possible to destroy events. We would however suffer a
+ * performance penalty for this and save very little memory.
+ */
+
+typedef union {
+ ethr_ts_event ts_ev;
+ char align[ETHR_CACHE_LINE_ALIGN_SIZE(sizeof(ethr_ts_event))];
+} ethr_aligned_ts_event;
+
+static ethr_spinlock_t ts_ev_alloc_lock;
+static ethr_ts_event *free_ts_ev;
+
+#if SIZEOF_VOID_P == SIZEOF_INT
+typedef unsigned int EthrPtrSzUInt;
+#elif SIZEOF_VOID_P == SIZEOF_LONG
+typedef unsigned long EthrPtrSzUInt;
+#else
+#error No pointer sized integer type
+#endif
+
+static ethr_ts_event *ts_event_pool(int size, ethr_ts_event **endpp)
+{
+ int i;
+ ethr_aligned_ts_event *atsev;
+ atsev = ethr_mem__.std.alloc(sizeof(ethr_aligned_ts_event) * size
+ + ETHR_CACHE_LINE_SIZE);
+ if (!atsev)
+ return NULL;
+ if ((((EthrPtrSzUInt) atsev) & ETHR_CACHE_LINE_MASK) == 0)
+ atsev = ((ethr_aligned_ts_event *)
+ ((((EthrPtrSzUInt) atsev) & ~ETHR_CACHE_LINE_MASK)
+ + ETHR_CACHE_LINE_SIZE));
+ for (i = 1; i < size; i++) {
+ atsev[i-1].ts_ev.next = &atsev[i].ts_ev;
+ ethr_atomic_init(&atsev[i-1].ts_ev.uaflgs, 0);
+ atsev[i-1].ts_ev.iflgs = 0;
+ }
+ ethr_atomic_init(&atsev[size-1].ts_ev.uaflgs, 0);
+ atsev[size-1].ts_ev.iflgs = 0;
+ atsev[size-1].ts_ev.next = NULL;
+ if (endpp)
+ *endpp = &atsev[size-1].ts_ev;
+ return &atsev[0].ts_ev;
+}
+
+static int init_ts_event_alloc(void)
+{
+ free_ts_ev = ts_event_pool(ERTS_TS_EV_ALLOC_DEFAULT_POOL_SIZE,
+ NULL);
+ if (!free_ts_ev)
+ return ENOMEM;
+ return ethr_spinlock_init(&ts_ev_alloc_lock);
+}
+
+static ethr_ts_event *ts_event_alloc(void)
+{
+ ethr_ts_event *ts_ev;
+ ethr_spin_lock(&ts_ev_alloc_lock);
+ if (free_ts_ev) {
+ ts_ev = free_ts_ev;
+ free_ts_ev = ts_ev->next;
+ ethr_spin_unlock(&ts_ev_alloc_lock);
+ }
+ else {
+ ethr_ts_event *ts_ev_pool_end;
+ ethr_spin_unlock(&ts_ev_alloc_lock);
+
+ ts_ev = ts_event_pool(ERTS_TS_EV_ALLOC_POOL_SIZE, &ts_ev_pool_end);
+ if (!ts_ev)
+ return NULL;
+
+ ethr_spin_lock(&ts_ev_alloc_lock);
+ ts_ev_pool_end->next = free_ts_ev;
+ free_ts_ev = ts_ev->next;
+ ethr_spin_unlock(&ts_ev_alloc_lock);
+ }
+ return ts_ev;
+}
+
+static void ts_event_free(ethr_ts_event *ts_ev)
+{
+ ETHR_ASSERT(!ts_ev->udata);
+ ethr_spin_lock(&ts_ev_alloc_lock);
+ ts_ev->next = free_ts_ev;
+ free_ts_ev = ts_ev;
+ ethr_spin_unlock(&ts_ev_alloc_lock);
+}
+
+int ethr_make_ts_event__(ethr_ts_event **tsepp)
+{
+ int res;
+ ethr_ts_event *tsep = *tsepp;
+
+ if (!tsep) {
+ tsep = ts_event_alloc();
+ if (!tsep)
+ return ENOMEM;
+ }
+
+ if ((tsep->iflgs & ETHR_TS_EV_INITED) == 0) {
+ res = ethr_event_init(&tsep->event);
+ if (res != 0) {
+ ts_event_free(tsep);
+ return res;
+ }
+ }
+
+ tsep->iflgs = ETHR_TS_EV_INITED;
+ tsep->udata = NULL;
+ tsep->rgix = 0;
+ tsep->mtix = 0;
+
+ res = ethr_set_tse__(tsep);
+ if (res != 0 && tsepp && *tsepp) {
+ ts_event_free(tsep);
+ return res;
+ }
+
+ if (tsepp)
+ *tsepp = tsep;
+
+ return 0;
+}
+
+int ethr_get_tmp_ts_event__(ethr_ts_event **tsepp)
+{
+ int res;
+ ethr_ts_event *tsep = *tsepp;
+
+ if (!tsep) {
+ tsep = ts_event_alloc();
+ if (!tsep)
+ return ENOMEM;
+ }
+
+ if ((tsep->iflgs & ETHR_TS_EV_INITED) == 0) {
+ res = ethr_event_init(&tsep->event);
+ if (res != 0) {
+ ts_event_free(tsep);
+ return res;
+ }
+ }
+
+ tsep->iflgs = ETHR_TS_EV_INITED|ETHR_TS_EV_TMP;
+ tsep->udata = NULL;
+
+ if (tsepp)
+ *tsepp = tsep;
+
+ return 0;
+}
+
+int ethr_free_ts_event__(ethr_ts_event *tsep)
+{
+ ts_event_free(tsep);
+ return 0;
+}
+
+void ethr_ts_event_destructor__(void *vtsep)
+{
+ if (vtsep) {
+ ethr_ts_event *tsep = (ethr_ts_event *) vtsep;
+ ts_event_free(tsep);
+ ethr_set_tse__(NULL);
+ }
+}
+
+int ethr_set_main_thr_status(int on, int no)
+{
+ ethr_ts_event *tsep = ethr_get_tse__();
+ if (!tsep)
+ return EINVAL;
+ if (on) {
+ if (no < 1 || main_threads < no)
+ return EINVAL;
+ tsep->mtix = (unsigned short) no;
+ tsep->iflgs |= ETHR_TS_EV_MAIN_THR;
+ }
+ else {
+ tsep->iflgs &= ~ETHR_TS_EV_MAIN_THR;
+ tsep->mtix = (unsigned short) 0;
+ }
+ return 0;
+}
+
+int ethr_get_main_thr_status(int *on)
+{
+ ethr_ts_event *tsep = ethr_get_tse__();
+ if (!tsep)
+ *on = 0;
+ else {
+ if (tsep->iflgs & ETHR_TS_EV_MAIN_THR)
+ *on = 1;
+ else
+ *on = 0;
+ }
+ return 0;
+}
+
+
+/* Atomics */
+
+void
+ethr_atomic_init(ethr_atomic_t *var, long i)
+{
+ ETHR_ASSERT(var);
+ ethr_atomic_init__(var, i);
+}
+
+void
+ethr_atomic_set(ethr_atomic_t *var, long i)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ ethr_atomic_set__(var, i);
+}
+
+long
+ethr_atomic_read(ethr_atomic_t *var)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_read__(var);
+}
+
+
+long
+ethr_atomic_add_read(ethr_atomic_t *var, long incr)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_add_read__(var, incr);
+}
+
+long
+ethr_atomic_inc_read(ethr_atomic_t *var)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_inc_read__(var);
+}
+
+long
+ethr_atomic_dec_read(ethr_atomic_t *var)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_dec_read__(var);
+}
+
+void
+ethr_atomic_add(ethr_atomic_t *var, long incr)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ ethr_atomic_add__(var, incr);
+}
+
+void
+ethr_atomic_inc(ethr_atomic_t *var)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ ethr_atomic_inc__(var);
+}
+
+void
+ethr_atomic_dec(ethr_atomic_t *var)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ ethr_atomic_dec__(var);
+}
+
+long
+ethr_atomic_read_band(ethr_atomic_t *var, long mask)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_read_band__(var, mask);
+}
+
+long
+ethr_atomic_read_bor(ethr_atomic_t *var, long mask)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_read_bor__(var, mask);
+}
+
+long
+ethr_atomic_xchg(ethr_atomic_t *var, long new)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_xchg__(var, new);
+}
+
+long
+ethr_atomic_cmpxchg(ethr_atomic_t *var, long new, long expected)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_cmpxchg__(var, new, expected);
+}
+
+long
+ethr_atomic_read_acqb(ethr_atomic_t *var)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_read_acqb__(var);
+}
+
+long
+ethr_atomic_inc_read_acqb(ethr_atomic_t *var)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_inc_read_acqb__(var);
+}
+
+void
+ethr_atomic_set_relb(ethr_atomic_t *var, long i)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ ethr_atomic_set_relb__(var, i);
+}
+
+void
+ethr_atomic_dec_relb(ethr_atomic_t *var)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ ethr_atomic_dec_relb__(var);
+}
+
+long
+ethr_atomic_dec_read_relb(ethr_atomic_t *var)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_dec_read_relb__(var);
+}
+
+long
+ethr_atomic_cmpxchg_acqb(ethr_atomic_t *var, long new, long exp)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_cmpxchg_acqb__(var, new, exp);
+}
+
+long
+ethr_atomic_cmpxchg_relb(ethr_atomic_t *var, long new, long exp)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(var);
+ return ethr_atomic_cmpxchg_relb__(var, new, exp);
+}
+
+
+/* Spinlocks and rwspinlocks */
+
+int
+ethr_spinlock_init(ethr_spinlock_t *lock)
+{
+#if ETHR_XCHK
+ if (!lock) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+#endif
+ return ethr_spinlock_init__(lock);
+}
+
+int
+ethr_spinlock_destroy(ethr_spinlock_t *lock)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!lock) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+#endif
+ return ethr_spinlock_destroy__(lock);
+}
+
+void
+ethr_spin_unlock(ethr_spinlock_t *lock)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(lock);
+ ethr_spin_unlock__(lock);
+}
+
+void
+ethr_spin_lock(ethr_spinlock_t *lock)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(lock);
+ ethr_spin_lock__(lock);
+}
+
+int
+ethr_rwlock_init(ethr_rwlock_t *lock)
+{
+#if ETHR_XCHK
+ if (!lock) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+#endif
+ return ethr_rwlock_init__(lock);
+}
+
+int
+ethr_rwlock_destroy(ethr_rwlock_t *lock)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!lock) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+#endif
+ return ethr_rwlock_destroy__(lock);
+}
+
+void
+ethr_read_unlock(ethr_rwlock_t *lock)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(lock);
+ ethr_read_unlock__(lock);
+}
+
+void
+ethr_read_lock(ethr_rwlock_t *lock)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(lock);
+ ethr_read_lock__(lock);
+}
+
+void
+ethr_write_unlock(ethr_rwlock_t *lock)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(lock);
+ ethr_write_unlock__(lock);
+}
+
+void
+ethr_write_lock(ethr_rwlock_t *lock)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(lock);
+ ethr_write_lock__(lock);
+}
+
+ETHR_IMPL_NORETURN__ ethr_fatal_error__(const char *file,
+ int line,
+ const char *func,
+ int err)
+{
+ char *errstr;
+ if (err == ENOTSUP)
+ errstr = "Operation not supported";
+ else {
+ errstr = strerror(err);
+ if (!errstr)
+ errstr = "Unknown error";
+ }
+ fprintf(stderr, "%s:%d: Fatal error in %s(): %s (%d)\n",
+ file, line, func, errstr, err);
+ ethr_abort__();
+}
+
+int ethr_assert_failed(const char *file, int line, const char *func, char *a)
+{
+ fprintf(stderr, "%s:%d: %s(): Assertion failed: %s\n", file, line, func, a);
+ ethr_abort__();
+ return 0;
+}
diff --git a/erts/lib_src/common/ethr_cbf.c b/erts/lib_src/common/ethr_cbf.c
new file mode 100644
index 0000000000..04feceec89
--- /dev/null
+++ b/erts/lib_src/common/ethr_cbf.c
@@ -0,0 +1,36 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2010. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+
+/*
+ * We keep this function alone in a separate file so the
+ * compiler wont optimize it away.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "ethread.h"
+
+void
+ethr_compiler_barrier_fallback(void)
+{
+
+}
diff --git a/erts/lib_src/common/ethr_mutex.c b/erts/lib_src/common/ethr_mutex.c
new file mode 100644
index 0000000000..f918bba81d
--- /dev/null
+++ b/erts/lib_src/common/ethr_mutex.c
@@ -0,0 +1,2758 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2010. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+/*
+ * Description: Mutex, rwmutex and condition variable implementation
+ * Author: Rickard Green
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#define ETHR_INLINE_FUNC_NAME_(X) X ## __
+#define ETHR_MUTEX_IMPL__
+
+#include <limits.h>
+#include "ethread.h"
+#include "ethr_internal.h"
+
+#define ETHR_SPIN_WITH_WAITERS 1
+
+#define ETHR_MTX_MAX_FLGS_SPIN 1000
+
+#ifdef ETHR_USE_OWN_RWMTX_IMPL__
+static int default_rwmtx_main_spincount;
+static int default_rwmtx_aux_spincount;
+#endif
+#ifdef ETHR_USE_OWN_MTX_IMPL__
+static int default_mtx_main_spincount;
+static int default_mtx_aux_spincount;
+static int default_cnd_main_spincount;
+static int default_cnd_aux_spincount;
+#endif
+
+static int no_spin;
+
+#ifndef ETHR_USE_OWN_RWMTX_IMPL__
+static pthread_rwlockattr_t write_pref_attr_data;
+static pthread_rwlockattr_t *write_pref_attr;
+#endif
+
+#if defined(ETHR_MTX_Q_LOCK_SPINLOCK__)
+# define ETHR_MTX_QLOCK_INIT ethr_spinlock_init
+# define ETHR_MTX_QLOCK_DESTROY ethr_spinlock_destroy
+# define ETHR_MTX_Q_LOCK ethr_spin_lock
+# define ETHR_MTX_Q_UNLOCK ethr_spin_unlock
+#elif defined(ETHR_MTX_Q_LOCK_PTHREAD_MUTEX__)
+# define ETHR_MTX_QLOCK_INIT(QL) pthread_mutex_init((QL), NULL)
+# define ETHR_MTX_QLOCK_DESTROY pthread_mutex_destroy
+# define ETHR_MTX_Q_LOCK(L) \
+do { \
+ int res__ = pthread_mutex_lock(L); \
+ if (res__ != 0) \
+ ETHR_FATAL_ERROR__(res__); \
+} while (0)
+# define ETHR_MTX_Q_UNLOCK(L) \
+do { \
+ int res__ = pthread_mutex_unlock(L); \
+ if (res__ != 0) \
+ ETHR_FATAL_ERROR__(res__); \
+} while (0)
+#elif defined(ETHR_MTX_Q_LOCK_CRITICAL_SECTION__)
+# define ETHR_MTX_QLOCK_INIT(QL) (InitializeCriticalSection((QL)), 0)
+# define ETHR_MTX_QLOCK_DESTROY(QL) (DeleteCriticalSection((QL)), 0)
+# define ETHR_MTX_Q_LOCK(QL) EnterCriticalSection((QL))
+# define ETHR_MTX_Q_UNLOCK(QL) LeaveCriticalSection((QL))
+#endif
+
+int
+ethr_mutex_lib_init(int cpu_conf)
+{
+ int res = 0;
+
+ no_spin = cpu_conf == 1;
+
+#ifdef ETHR_USE_OWN_MTX_IMPL__
+ default_mtx_main_spincount = ETHR_MTX_DEFAULT_MAIN_SPINCOUNT;
+ default_mtx_aux_spincount = ETHR_MTX_DEFAULT_AUX_SPINCOUNT;
+ default_cnd_main_spincount = ETHR_CND_DEFAULT_MAIN_SPINCOUNT;
+ default_cnd_aux_spincount = ETHR_CND_DEFAULT_AUX_SPINCOUNT;
+#endif
+
+#ifdef ETHR_USE_OWN_RWMTX_IMPL__
+
+ default_rwmtx_main_spincount = ETHR_RWMTX_DEFAULT_MAIN_SPINCOUNT;
+ default_rwmtx_aux_spincount = ETHR_RWMTX_DEFAULT_AUX_SPINCOUNT;
+
+#else
+
+#if defined(ETHR_HAVE_PTHREAD_RWLOCKATTR_SETKIND_NP) \
+ && defined(ETHR_HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP)
+ res = pthread_rwlockattr_init(&write_pref_attr_data);
+ if (res != 0)
+ return res;
+ res = pthread_rwlockattr_setkind_np(
+ &write_pref_attr_data,
+ PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
+ write_pref_attr = &write_pref_attr_data;
+#else
+ write_pref_attr = NULL;
+#endif
+
+#endif
+
+ return res;
+}
+
+#ifdef ETHR_USE_OWN_RWMTX_IMPL__
+
+#ifdef ETHR_ATOMIC_HAVE_INC_DEC_INSTRUCTIONS
+#if 0 /*
+ * When inc and dec are real atomic instructions as on x86, the
+ * ETHR_RLOCK_WITH_INC_DEC implementations performs better with
+ * lots of read locks compared to the cmpxchg based implementation.
+ * It, however, performs worse with lots of mixed reads and writes.
+ * It could be used for rwlocks that are known to be read locked
+ * much, but the readers array based implementation outperforms it
+ * by far. Therefore, it has been disabled, and will probably be
+ * removed some time in the future.
+ */
+# define ETHR_RLOCK_WITH_INC_DEC
+#endif
+#endif
+
+static int reader_groups_array_size = 0;
+static int main_threads_array_size = 0;
+
+#endif
+
+int
+ethr_mutex_lib_late_init(int no_reader_groups, int no_main_threads)
+{
+#ifdef ETHR_USE_OWN_RWMTX_IMPL__
+ reader_groups_array_size = (no_reader_groups <= 1
+ ? 1
+ : no_reader_groups + 1);
+ main_threads_array_size = (no_main_threads <= 1
+ ? 1
+ : no_main_threads + 1);
+#endif
+ return 0;
+}
+
+int
+ethr_rwmutex_set_reader_group(int ix)
+{
+#ifdef ETHR_USE_OWN_RWMTX_IMPL__
+ ethr_ts_event *tse;
+
+ if (ix < 0 || reader_groups_array_size <= ix)
+ return EINVAL;
+
+ tse = ethr_get_ts_event();
+
+ if ((tse->iflgs & ETHR_TS_EV_ETHREAD) == 0) {
+ ethr_leave_ts_event(tse);
+ return EINVAL;
+ }
+
+ tse->rgix = ix;
+
+ ethr_leave_ts_event(tse);
+#endif
+ return 0;
+}
+
+#if defined(ETHR_MTX_HARD_DEBUG_Q) || defined(ETHR_MTX_HARD_DEBUG_WSQ)
+static void hard_debug_chk_q__(struct ethr_mutex_base_ *, int);
+#define ETHR_RWMTX_HARD_DEBUG_CHK_Q(RWMTX) hard_debug_chk_q__(&(RWMTX)->mtxb,1)
+#define ETHR_MTX_HARD_DEBUG_CHK_Q(MTX) hard_debug_chk_q__(&(MTX)->mtxb, 0)
+#else
+#define ETHR_RWMTX_HARD_DEBUG_CHK_Q(RWMTX)
+#define ETHR_MTX_HARD_DEBUG_CHK_Q(MTX)
+#endif
+
+#ifdef ETHR_USE_OWN_RWMTX_IMPL__
+static void
+rwmutex_unlock_wake(ethr_rwmutex *rwmtx,
+ int have_w,
+ long initial);
+static int
+rwmutex_try_complete_runlock(ethr_rwmutex *rwmtx,
+ long initial,
+ ethr_ts_event *tse,
+ int start_next_ix,
+ int check_before_try,
+ int try_write_lock);
+#endif
+
+#if defined(ETHR_USE_OWN_RWMTX_IMPL__) || defined(ETHR_USE_OWN_MTX_IMPL__)
+
+/* -- Utilities operating both on ordinary mutexes and read write mutexes -- */
+
+static ETHR_INLINE void
+rwmutex_freqread_wtng_rdrs_inc(ethr_rwmutex *rwmtx, ethr_ts_event *tse)
+{
+ int ix = (rwmtx->type == ETHR_RWMUTEX_TYPE_FREQUENT_READ
+ ? tse->rgix
+ : tse->mtix);
+ rwmtx->tdata.ra[ix].data.waiting_readers++;
+}
+
+static ETHR_INLINE void
+rwmutex_freqread_rdrs_add(ethr_rwmutex *rwmtx,
+ ethr_rwmutex_type type,
+ int ix,
+ int inc)
+{
+ if (type == ETHR_RWMUTEX_TYPE_FREQUENT_READ || ix == 0)
+ ethr_atomic_add(&rwmtx->tdata.ra[ix].data.readers, inc);
+ else {
+ ETHR_ASSERT(type == ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ);
+ ETHR_ASSERT(ethr_atomic_read(&rwmtx->tdata.ra[ix].data.readers) == 0);
+ ETHR_ASSERT(inc == 1);
+ ethr_atomic_set(&rwmtx->tdata.ra[ix].data.readers, (long) 1);
+ }
+}
+
+static ETHR_INLINE void
+rwmutex_freqread_rdrs_inc(ethr_rwmutex *rwmtx, ethr_ts_event *tse)
+{
+ int ix;
+ if (rwmtx->type == ETHR_RWMUTEX_TYPE_FREQUENT_READ) {
+ ix = tse->rgix;
+ atomic_inc:
+ ethr_atomic_inc(&rwmtx->tdata.ra[ix].data.readers);
+ }
+ else {
+ ix = tse->mtix;
+ if (ix == 0)
+ goto atomic_inc;
+ ETHR_ASSERT(rwmtx->type == ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ);
+ ETHR_ASSERT(ethr_atomic_read(&rwmtx->tdata.ra[ix].data.readers) == 0);
+ ethr_atomic_set(&rwmtx->tdata.ra[ix].data.readers, (long) 1);
+ }
+}
+
+static ETHR_INLINE void
+rwmutex_freqread_rdrs_dec(ethr_rwmutex *rwmtx, ethr_ts_event *tse)
+{
+ int ix;
+ if (rwmtx->type == ETHR_RWMUTEX_TYPE_FREQUENT_READ) {
+ ix = tse->rgix;
+ atomic_dec:
+ ethr_atomic_dec(&rwmtx->tdata.ra[ix].data.readers);
+ }
+ else {
+ ix = tse->mtix;
+ if (ix == 0)
+ goto atomic_dec;
+ ETHR_ASSERT(rwmtx->type == ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ);
+ ETHR_ASSERT(ethr_atomic_read(&rwmtx->tdata.ra[ix].data.readers) == 1);
+ ethr_atomic_set(&rwmtx->tdata.ra[ix].data.readers, (long) 0);
+ }
+}
+
+static ETHR_INLINE long
+rwmutex_freqread_rdrs_dec_read(ethr_rwmutex *rwmtx, ethr_ts_event *tse)
+{
+ int ix;
+ if (rwmtx->type == ETHR_RWMUTEX_TYPE_FREQUENT_READ) {
+ ix = tse->rgix;
+ atomic_dec_read:
+ return ethr_atomic_dec_read(&rwmtx->tdata.ra[ix].data.readers);
+ }
+ else {
+ ix = tse->mtix;
+ if (ix == 0)
+ goto atomic_dec_read;
+ ETHR_ASSERT(rwmtx->type == ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ);
+ ETHR_ASSERT(ethr_atomic_read(&rwmtx->tdata.ra[ix].data.readers) == 1);
+ ethr_atomic_set(&rwmtx->tdata.ra[ix].data.readers, (long) 0);
+ return (long) 0;
+ }
+}
+
+static ETHR_INLINE long
+rwmutex_freqread_rdrs_dec_read_relb(ethr_rwmutex *rwmtx, ethr_ts_event *tse)
+{
+ int ix;
+ if (rwmtx->type == ETHR_RWMUTEX_TYPE_FREQUENT_READ) {
+ ix = tse->rgix;
+ atomic_dec_read:
+ return ethr_atomic_dec_read_relb(&rwmtx->tdata.ra[ix].data.readers);
+ }
+ else {
+ ix = tse->mtix;
+ if (ix == 0)
+ goto atomic_dec_read;
+ ETHR_ASSERT(rwmtx->type == ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ);
+ ETHR_ASSERT(ethr_atomic_read(&rwmtx->tdata.ra[ix].data.readers) == 1);
+ ethr_atomic_set_relb(&rwmtx->tdata.ra[ix].data.readers, (long) 0);
+ return (long) 0;
+ }
+}
+
+static ETHR_INLINE long
+rwmutex_freqread_rdrs_read(ethr_rwmutex *rwmtx, int ix)
+{
+ long res = ethr_atomic_read(&rwmtx->tdata.ra[ix].data.readers);
+#ifdef ETHR_DEBUG
+ switch (rwmtx->type) {
+ case ETHR_RWMUTEX_TYPE_FREQUENT_READ:
+ ETHR_ASSERT(res >= 0);
+ break;
+ case ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ:
+ ETHR_ASSERT(res == 0 || res == 1);
+ break;
+ default:
+ ETHR_ASSERT(0);
+ break;
+ }
+#endif
+ return res;
+}
+
+
+static ETHR_INLINE void
+enqueue(ethr_ts_event **queue,
+ ethr_ts_event *tse_start,
+ ethr_ts_event *tse_end)
+{
+ if (!*queue) {
+ *queue = tse_start;
+ tse_start->prev = tse_end;
+ tse_end->next = tse_start;
+ }
+ else {
+ tse_end->next = *queue;
+ tse_start->prev = (*queue)->prev;
+ (*queue)->prev->next = tse_start;
+ (*queue)->prev = tse_end;
+ }
+}
+
+static ETHR_INLINE void
+insert(ethr_ts_event *tse_pred, ethr_ts_event *tse)
+{
+ tse->next = tse_pred->next;
+ tse->prev = tse_pred;
+ tse_pred->next->prev = tse;
+ tse_pred->next = tse;
+}
+
+static ETHR_INLINE void
+dequeue(ethr_ts_event **queue,
+ ethr_ts_event *tse_start,
+ ethr_ts_event *tse_end)
+{
+ if (tse_start->prev == tse_end) {
+ ETHR_ASSERT(*queue == tse_start && tse_end->next == tse_start);
+ *queue = NULL;
+ }
+ else {
+ if (*queue == tse_start)
+ *queue = tse_end->next;
+ tse_end->next->prev = tse_start->prev;
+ tse_start->prev->next = tse_end->next;
+ }
+}
+
+static void
+event_wait(struct ethr_mutex_base_ *mtxb,
+ ethr_ts_event *tse,
+ int spincount,
+ long type,
+ int is_rwmtx,
+ int is_freq_read)
+{
+ int locked = 0;
+ long act;
+ int need_try_complete_runlock = 0;
+
+ /* Need to enqueue and wait... */
+
+ tse->uflgs = type;
+ ethr_atomic_set(&tse->uaflgs, type);
+
+ ETHR_MTX_Q_LOCK(&mtxb->qlck);
+ locked = 1;
+
+#ifdef ETHR_MTX_HARD_DEBUG_Q
+ hard_debug_chk_q__(mtxb, is_rwmtx);
+#endif
+
+ act = ethr_atomic_read(&mtxb->flgs);
+
+ if (act & type) {
+
+ /* Wait bit already there; enqueue... */
+
+ ETHR_ASSERT(mtxb->q);
+ if (type == ETHR_RWMTX_W_WAIT_FLG__) {
+ enqueue(&mtxb->q, tse, tse);
+#ifdef ETHR_MTX_HARD_DEBUG_WSQ
+ mtxb->ws++;
+#endif
+ }
+ else {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ ETHR_ASSERT(is_rwmtx);
+ ETHR_ASSERT(rwmtx->rq_end);
+ insert(rwmtx->rq_end, tse);
+ rwmtx->rq_end = tse;
+ if (is_freq_read)
+ rwmutex_freqread_wtng_rdrs_inc(rwmtx, tse);
+ else
+ rwmtx->tdata.rs++;
+ }
+ }
+ else {
+
+ /* Set wait bit */
+
+ while (1) {
+ long new, exp = act;
+ int freqread_tryrlock = 0;
+ need_try_complete_runlock = 0;
+
+ if (type == ETHR_RWMTX_W_WAIT_FLG__) {
+ if (is_freq_read && act == ETHR_RWMTX_R_FLG__)
+ need_try_complete_runlock = 1;
+ if (act != 0)
+ new = act | ETHR_RWMTX_W_WAIT_FLG__;
+ else
+ new = ETHR_RWMTX_W_FLG__; /* Try to get it */
+ }
+ else {
+ ETHR_ASSERT(is_rwmtx);
+
+ if (!is_freq_read) {
+ if (act & (ETHR_RWMTX_W_FLG__| ETHR_RWMTX_W_WAIT_FLG__))
+ new = act | ETHR_RWMTX_R_WAIT_FLG__;
+ else
+ new = act + 1; /* Try to get it */
+ }
+ else {
+ if (act & ~ETHR_RWMTX_R_FLG__)
+ new = act | ETHR_RWMTX_R_WAIT_FLG__;
+ else { /* Try to get it */
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ rwmutex_freqread_rdrs_inc(rwmtx, tse);
+ ETHR_MEMORY_BARRIER;
+ new = act | ETHR_RWMTX_R_FLG__;
+ freqread_tryrlock = 1;
+ }
+ }
+ }
+
+ act = ethr_atomic_cmpxchg_acqb(&mtxb->flgs, new, exp);
+ if (exp == act) {
+ if (new & type) {
+ act = new;
+ break;
+ }
+ else {
+ /* Got it */
+ goto done;
+ }
+ }
+
+ if (freqread_tryrlock) {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+
+ /* We didn't set ETHR_RWMTX_R_FLG__, however someone
+ else might have */
+ if (act == ETHR_RWMTX_R_FLG__)
+ goto done; /* Got it by help from someone else */
+
+ ETHR_ASSERT((act & ETHR_RWMTX_WAIT_FLGS__) == 0);
+ /*
+ * We know that no waiter flags have been set, i.e.,
+ * we cannot get into a situation where we need to wake
+ * someone up here. Just restore the readers counter
+ * and do it over again...
+ */
+ rwmutex_freqread_rdrs_dec(rwmtx, tse);
+ }
+ }
+
+ /* Enqueue */
+
+ if (type == ETHR_RWMTX_R_WAIT_FLG__) {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ ETHR_ASSERT(is_rwmtx);
+ ETHR_ASSERT(!rwmtx->rq_end);
+ rwmtx->rq_end = tse;
+ if (is_freq_read)
+ rwmutex_freqread_wtng_rdrs_inc(rwmtx, tse);
+ else
+ rwmtx->tdata.rs++;
+ }
+#ifdef ETHR_MTX_HARD_DEBUG_WSQ
+ else {
+ mtxb->ws++;
+ }
+#endif
+
+ enqueue(&mtxb->q, tse, tse);
+ }
+
+#ifdef ETHR_MTX_HARD_DEBUG_Q
+ hard_debug_chk_q__(mtxb, is_rwmtx);
+#endif
+
+ /* Wait */
+ locked = 0;
+ ETHR_MTX_Q_UNLOCK(&mtxb->qlck);
+
+ if (need_try_complete_runlock) {
+ ETHR_ASSERT(((ethr_rwmutex *) mtxb)->type
+ != ETHR_RWMUTEX_TYPE_NORMAL);
+ /*
+ * We were the only one in queue when we enqueued, and it
+ * was seemingly read locked. We need to try to complete a
+ * runlock otherwise we might be hanging forever. If the
+ * runlock could be completed we will be dequeued and
+ * woken by ourselves.
+ */
+ rwmutex_try_complete_runlock((ethr_rwmutex *) mtxb,
+ act, tse, 0, 1, 0);
+ }
+
+ while (1) {
+ ethr_event_reset(&tse->event);
+
+ act = ethr_atomic_read_acqb(&tse->uaflgs);
+ if (!act)
+ goto done; /* Got it */
+
+ ETHR_ASSERT(act == type);
+ ethr_event_swait(&tse->event, spincount);
+ /* swait result: 0 || EINTR */
+
+ act = ethr_atomic_read_acqb(&tse->uaflgs);
+ if (!act)
+ goto done; /* Got it */
+ }
+
+ done:
+ if (locked)
+ ETHR_MTX_Q_UNLOCK(&mtxb->qlck);
+}
+
+static void
+wake_writer(struct ethr_mutex_base_ *mtxb, int is_rwmtx)
+{
+ ethr_ts_event *tse;
+
+ tse = mtxb->q;
+ ETHR_ASSERT(tse);
+ dequeue(&mtxb->q, tse, tse);
+
+ ETHR_ASSERT(tse->uflgs == ETHR_RWMTX_W_WAIT_FLG__);
+ ETHR_ASSERT(ethr_atomic_read(&tse->uaflgs) == ETHR_RWMTX_W_WAIT_FLG__);
+#ifdef ETHR_MTX_HARD_DEBUG_WSQ
+ mtxb->ws--;
+#endif
+#if defined(ETHR_MTX_HARD_DEBUG_Q) || defined(ETHR_MTX_HARD_DEBUG_WSQ)
+ hard_debug_chk_q__(mtxb, is_rwmtx);
+#endif
+
+ ETHR_MTX_Q_UNLOCK(&mtxb->qlck);
+
+ ethr_atomic_set(&tse->uaflgs, 0);
+ ethr_event_set(&tse->event);
+}
+
+static ETHR_INLINE int
+initial_spincount(struct ethr_mutex_base_ *mtxb)
+{
+ return (mtxb->aux_scnt < ETHR_MTX_MAX_FLGS_SPIN
+ ? mtxb->aux_scnt
+ : ETHR_MTX_MAX_FLGS_SPIN);
+}
+
+static ETHR_INLINE int
+update_spincount(struct ethr_mutex_base_ *mtxb,
+ ethr_ts_event *tse,
+ int *start_scnt,
+ int *scnt)
+{
+ int sscnt = *start_scnt;
+ if (sscnt < 0) {
+ *scnt = ((tse->iflgs & ETHR_TS_EV_MAIN_THR)
+ ? mtxb->main_scnt
+ : mtxb->aux_scnt);
+ *scnt -= ETHR_MTX_MAX_FLGS_SPIN;
+ }
+ else {
+ *scnt = ((tse->iflgs & ETHR_TS_EV_MAIN_THR)
+ ? mtxb->main_scnt
+ : mtxb->aux_scnt);
+ *scnt -= sscnt;
+ if (*scnt > 0 && sscnt < ETHR_MTX_MAX_FLGS_SPIN) {
+ *scnt = ETHR_MTX_MAX_FLGS_SPIN - sscnt;
+ *start_scnt = -1;
+ return 0;
+ }
+ }
+ return 1;
+}
+
+int check_readers_array(ethr_rwmutex *rwmtx,
+ int start_rix,
+ int length,
+ int pre_check);
+
+static ETHR_INLINE void
+write_lock_wait(struct ethr_mutex_base_ *mtxb,
+ long initial,
+ int is_rwmtx,
+ int is_freq_read)
+{
+ long act = initial;
+ int scnt, start_scnt;
+ ethr_ts_event *tse = NULL;
+ int until_yield = ETHR_YIELD_AFTER_BUSY_LOOPS;
+ int res;
+ int freq_read_size = -1;
+ int freq_read_start_ix = -1;
+
+ ETHR_ASSERT(!is_freq_read || is_rwmtx);
+
+ start_scnt = scnt = initial_spincount(mtxb);
+
+ /*
+ * Spin trying to write lock for a while. If unsuccessful,
+ * wait on event.
+ */
+
+ while (1) {
+ long exp;
+
+ while (act != 0) {
+
+ if (is_freq_read && act == ETHR_RWMTX_R_FLG__) {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ if (!tse)
+ tse = ethr_get_ts_event();
+ if (freq_read_size < 0) {
+ if (rwmtx->type == ETHR_RWMUTEX_TYPE_FREQUENT_READ) {
+ freq_read_size = reader_groups_array_size;
+ freq_read_start_ix = tse->rgix;
+ }
+ else {
+ freq_read_size = main_threads_array_size;
+ freq_read_start_ix = tse->mtix;
+ }
+ }
+ res = check_readers_array(rwmtx,
+ freq_read_start_ix,
+ freq_read_size,
+ 1);
+ scnt--;
+ if (res == 0) {
+ act = ethr_atomic_read(&mtxb->flgs);
+ if (act & ETHR_RWMTX_R_MASK__) {
+ res = rwmutex_try_complete_runlock(rwmtx, act,
+ tse, 0, 0,
+ 1);
+ if (res != EBUSY)
+ goto done; /* Got it */
+ }
+ if (scnt <= 0)
+ goto chk_spin;
+ if (--until_yield == 0) {
+ until_yield = ETHR_YIELD_AFTER_BUSY_LOOPS;
+ ETHR_YIELD();
+ }
+ continue;
+ }
+ }
+
+ if (scnt <= 0) {
+ chk_spin:
+ scnt = 0;
+
+ if (!tse)
+ tse = ethr_get_ts_event();
+ if (update_spincount(mtxb, tse, &start_scnt, &scnt)) {
+ event_wait(mtxb, tse, scnt, ETHR_RWMTX_W_WAIT_FLG__,
+ is_rwmtx, is_freq_read);
+ goto done;
+ }
+ }
+ ETHR_SPIN_BODY;
+ if (--until_yield == 0) {
+ until_yield = ETHR_YIELD_AFTER_BUSY_LOOPS;
+ ETHR_YIELD();
+ }
+ act = ethr_atomic_read(&mtxb->flgs);
+ scnt--;
+ }
+ ETHR_ASSERT(scnt >= 0);
+
+ exp = act;
+
+ act = ethr_atomic_cmpxchg_acqb(&mtxb->flgs,
+ ETHR_RWMTX_W_FLG__,
+ exp);
+ if (act == 0)
+ goto done; /* Got it */
+ }
+
+ done:
+ if (tse)
+ ethr_leave_ts_event(tse);
+}
+
+static int
+mtxb_init(struct ethr_mutex_base_ *mtxb,
+ int def_main_scnt,
+ int main_scnt,
+ int def_aux_scnt,
+ int aux_scnt)
+{
+ ETHR_MTX_HARD_DEBUG_LFS_INIT(mtxb);
+#ifdef ETHR_MTX_HARD_DEBUG_WSQ
+ mtxb->ws = 0;
+#endif
+ if (no_spin) {
+ mtxb->main_scnt = 0;
+ mtxb->aux_scnt = 0;
+ }
+ else {
+ if (main_scnt > SHRT_MAX)
+ mtxb->main_scnt = SHRT_MAX;
+ else if (main_scnt < 0)
+ mtxb->main_scnt = def_main_scnt;
+ else
+ mtxb->main_scnt = (short) main_scnt;
+ if (aux_scnt > SHRT_MAX)
+ mtxb->aux_scnt = SHRT_MAX;
+ else if (aux_scnt < 0)
+ mtxb->aux_scnt = def_aux_scnt;
+ else
+ mtxb->aux_scnt = (short) aux_scnt;
+ if (mtxb->main_scnt < mtxb->aux_scnt)
+ mtxb->main_scnt = mtxb->aux_scnt;
+
+ }
+ mtxb->q = NULL;
+ ethr_atomic_init(&mtxb->flgs, 0);
+ return ETHR_MTX_QLOCK_INIT(&mtxb->qlck);
+}
+
+static int
+mtxb_destroy(struct ethr_mutex_base_ *mtxb)
+{
+ long act;
+ ETHR_MTX_Q_LOCK(&mtxb->qlck);
+ act = ethr_atomic_read(&mtxb->flgs);
+ ETHR_MTX_Q_UNLOCK(&mtxb->qlck);
+ if (act != 0)
+ return EINVAL;
+ return ETHR_MTX_QLOCK_DESTROY(&mtxb->qlck);
+}
+
+
+#endif /* ETHR_USE_OWN_RWMTX_IMPL__ || ETHR_USE_OWN_MTX_IMPL__ */
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
+ * Mutex and condition variable implementation *
+\* */
+
+#ifdef ETHR_USE_OWN_MTX_IMPL__
+
+/* -- Mutex ---------------------------------------------------------------- */
+
+int
+ethr_mutex_init_opt(ethr_mutex *mtx, ethr_mutex_opt *opt)
+{
+ int res;
+#if ETHR_XCHK
+ if (!mtx) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+ mtx->initialized = ETHR_MUTEX_INITIALIZED;
+#endif
+ ETHR_MTX_HARD_DEBUG_FENCE_INIT(mtx);
+ res = mtxb_init(&mtx->mtxb,
+ default_mtx_main_spincount,
+ opt ? opt->main_spincount : -1,
+ default_mtx_aux_spincount,
+ opt ? opt->aux_spincount : -1);
+#if ETHR_XCHK
+ if (res != 0)
+ mtx->initialized = 0;
+#endif
+ return res;
+}
+
+int
+ethr_mutex_init(ethr_mutex *mtx)
+{
+ return ethr_mutex_init_opt(mtx, NULL);
+}
+
+int
+ethr_mutex_destroy(ethr_mutex *mtx)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!mtx) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+ mtx->initialized = 0;
+#endif
+ return mtxb_destroy(&mtx->mtxb);
+}
+
+void
+ethr_mutex_lock_wait__(ethr_mutex *mtx, long initial)
+{
+ write_lock_wait(&mtx->mtxb, initial, 0, 0);
+}
+
+void
+ethr_mutex_unlock_wake__(ethr_mutex *mtx, long initial)
+{
+ ethr_ts_event *tse;
+
+ ETHR_MTX_Q_LOCK(&mtx->mtxb.qlck);
+ tse = mtx->mtxb.q;
+
+ ETHR_ASSERT(tse);
+ ETHR_ASSERT(ethr_atomic_read(&mtx->mtxb.flgs)
+ == (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__));
+ ETHR_ASSERT(initial & ETHR_RWMTX_W_WAIT_FLG__);
+ ETHR_MTX_HARD_DEBUG_CHK_Q(mtx);
+
+ /*
+ * If we have multiple waiters, there is no need to modify
+ * mtxb->flgs; otherwise, we need to clear the write wait bit...
+ */
+ if (tse->next == mtx->mtxb.q)
+ ethr_atomic_set(&mtx->mtxb.flgs, ETHR_RWMTX_W_FLG__);
+
+ wake_writer(&mtx->mtxb, 0);
+}
+
+/* -- Condition variables -------------------------------------------------- */
+
+static void
+enqueue_mtx(ethr_mutex *mtx, ethr_ts_event *tse_start, ethr_ts_event *tse_end)
+{
+ long act;
+
+ /*
+ * `ethr_cond_signal()' and `ethr_cond_broadcast()' end up here. If `mtx'
+ * is not currently locked by current thread, we almost certainly have a
+ * hard to debug race condition. There might however be some (strange)
+ * use for it. POSIX also allow a call to `pthread_cond_signal' or
+ * `pthread_cond_broadcast' even though the the associated mutex isn't
+ * locked by the caller. Therefore, we also allow this kind of strange
+ * usage, but optimize for the case where the mutex is locked by the
+ * calling thread.
+ */
+
+ ETHR_MTX_Q_LOCK(&mtx->mtxb.qlck);
+
+ ETHR_MTX_HARD_DEBUG_CHK_Q(mtx);
+
+#ifdef ETHR_MTX_HARD_DEBUG_WSQ
+ {
+ int dbg_nws__ = 0;
+ ethr_ts_event *dbg_tse__;
+ for (dbg_tse__ = tse_start;
+ dbg_tse__ != tse_end;
+ dbg_tse__ = dbg_tse__->next)
+ dbg_nws__++;
+ mtx->mtxb.ws += dbg_nws__ + 1;
+ }
+#endif
+
+ act = ethr_atomic_read(&mtx->mtxb.flgs);
+ ETHR_ASSERT(act == 0
+ || act == ETHR_RWMTX_W_FLG__
+ || act == (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__));
+ if (act & ETHR_RWMTX_W_FLG__) {
+ /* The normal sane case */
+ if (!(act & ETHR_RWMTX_W_WAIT_FLG__)) {
+ ETHR_ASSERT(!mtx->mtxb.q);
+ act = ethr_atomic_cmpxchg(&mtx->mtxb.flgs,
+ (ETHR_RWMTX_W_FLG__
+ | ETHR_RWMTX_W_WAIT_FLG__),
+ ETHR_RWMTX_W_FLG__);
+ if (act != ETHR_RWMTX_W_FLG__) {
+ /*
+ * Sigh... this wasn't so sane after all since, the mutex was
+ * obviously not locked by the current thread....
+ */
+ ETHR_ASSERT(act == 0);
+ goto mtx_unlocked;
+ }
+ }
+
+#ifdef ETHR_DEBUG
+ if (act & ETHR_RWMTX_W_WAIT_FLG__)
+ ETHR_ASSERT(mtx->mtxb.q);
+ else
+ ETHR_ASSERT(!mtx->mtxb.q);
+#endif
+
+ enqueue(&mtx->mtxb.q, tse_start, tse_end);
+
+ ETHR_MTX_HARD_DEBUG_CHK_Q(mtx);
+ ETHR_MTX_Q_UNLOCK(&mtx->mtxb.qlck);
+
+ }
+ else {
+ int multi;
+ mtx_unlocked:
+ /* Sigh... mutex isn't locked... */
+
+ multi = tse_start != tse_end;
+
+ while (1) {
+ long new, exp = act;
+
+ if (multi || (act & ETHR_RWMTX_W_FLG__))
+ new = ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__;
+ else
+ new = ETHR_RWMTX_W_FLG__;
+
+ act = ethr_atomic_cmpxchg(&mtx->mtxb.flgs, new, exp);
+ if (exp == act) {
+ ETHR_ASSERT(!mtx->mtxb.q);
+ if (act & ETHR_RWMTX_W_FLG__) {
+ enqueue(&mtx->mtxb.q, tse_start, tse_end);
+
+ ETHR_MTX_HARD_DEBUG_CHK_Q(mtx);
+ ETHR_MTX_Q_UNLOCK(&mtx->mtxb.qlck);
+
+ }
+ else {
+ ETHR_ASSERT(!mtx->mtxb.q);
+ /*
+ * Acquired the mutex on behalf of the
+ * first thread in the queue; wake
+ * it and enqueue the rest...
+ */
+#ifdef ETHR_MTX_HARD_DEBUG_WSQ
+ mtx->mtxb.ws--;
+#endif
+ if (multi) {
+ enqueue(&mtx->mtxb.q, tse_start->next, tse_end);
+ ETHR_ASSERT(mtx->mtxb.q);
+ }
+
+ ETHR_MTX_HARD_DEBUG_CHK_Q(mtx);
+ ETHR_MTX_Q_UNLOCK(&mtx->mtxb.qlck);
+
+ ethr_atomic_set(&tse_start->uaflgs, 0);
+ ethr_event_set(&tse_start->event);
+ }
+ break;
+ }
+ }
+ }
+}
+
+int
+ethr_cond_init_opt(ethr_cond *cnd, ethr_cond_opt *opt)
+{
+ int res;
+#if ETHR_XCHK
+ if (!cnd) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+ cnd->initialized = ETHR_COND_INITIALIZED;
+#endif
+ ETHR_MTX_HARD_DEBUG_FENCE_INIT(cnd);
+ cnd->q = NULL;
+ if (no_spin) {
+ cnd->main_scnt = 0;
+ cnd->aux_scnt = 0;
+ }
+ else {
+ if (!opt || opt->main_spincount < 0)
+ cnd->main_scnt = default_cnd_main_spincount;
+ else if (opt->main_spincount > SHRT_MAX)
+ cnd->main_scnt = SHRT_MAX;
+ else
+ cnd->main_scnt = (short) opt->main_spincount;
+ if (!opt || opt->aux_spincount < 0)
+ cnd->aux_scnt = default_cnd_aux_spincount;
+ else if (opt->aux_spincount > SHRT_MAX)
+ cnd->aux_scnt = SHRT_MAX;
+ else
+ cnd->aux_scnt = (short) opt->aux_spincount;
+ if (cnd->main_scnt < cnd->aux_scnt)
+ cnd->main_scnt = cnd->aux_scnt;
+ }
+ ETHR_MTX_QLOCK_INIT(&cnd->qlck);
+ return 0;
+}
+
+int
+ethr_cond_init(ethr_cond *cnd)
+{
+ return ethr_cond_init_opt(cnd, NULL);
+}
+
+int
+ethr_cond_destroy(ethr_cond *cnd)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!cnd || cnd->initialized != ETHR_COND_INITIALIZED) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+ cnd->initialized = 0;
+#endif
+ return ETHR_MTX_QLOCK_DESTROY(&cnd->qlck);
+}
+
+void
+ethr_cond_signal(ethr_cond *cnd)
+{
+ ethr_ts_event *tse;
+
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(!cnd);
+ ETHR_ASSERT(cnd->initialized == ETHR_COND_INITIALIZED);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(cnd);
+
+ ETHR_MTX_Q_LOCK(&cnd->qlck);
+
+ tse = cnd->q;
+
+ if (!tse) {
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(cnd);
+ ETHR_MTX_Q_UNLOCK(&cnd->qlck);
+ }
+ else {
+ ethr_mutex *mtx = (ethr_mutex *) tse->udata;
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
+ ETHR_ASSERT(tse->uflgs == ETHR_RWMTX_W_WAIT_FLG__);
+ ETHR_ASSERT(ethr_atomic_read(&tse->uaflgs) == ETHR_CND_WAIT_FLG__);
+
+ ethr_atomic_set(&tse->uaflgs, ETHR_RWMTX_W_WAIT_FLG__);
+
+ dequeue(&cnd->q, tse, tse);
+
+ ETHR_MTX_Q_UNLOCK(&cnd->qlck);
+
+ tse->next = tse->prev = NULL;
+
+ enqueue_mtx(mtx, tse, tse);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(cnd);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
+ }
+}
+
+void
+ethr_cond_broadcast(ethr_cond *cnd)
+{
+ int res;
+ int got_all;
+ ethr_ts_event *tse;
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(!cnd);
+ ETHR_ASSERT(cnd->initialized == ETHR_COND_INITIALIZED);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(cnd);
+ do {
+ got_all = 1;
+
+ ETHR_MTX_Q_LOCK(&cnd->qlck);
+
+ tse = cnd->q;
+
+ if (!tse) {
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(cnd);
+ ETHR_MTX_Q_UNLOCK(&cnd->qlck);
+ }
+ else {
+ ethr_mutex *mtx = (ethr_mutex *) tse->udata;
+ ethr_ts_event *tse_tmp, *tse_end;
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
+ tse_end = cnd->q->prev;
+
+ tse_tmp = tse;
+
+ do {
+
+ if (mtx == (ethr_mutex *) tse_tmp->udata) {
+ /* The normal case */
+
+ ETHR_ASSERT(tse_tmp->uflgs == ETHR_RWMTX_W_WAIT_FLG__);
+ ETHR_ASSERT(ethr_atomic_read(&tse_tmp->uaflgs)
+ == ETHR_CND_WAIT_FLG__);
+
+ ethr_atomic_set(&tse_tmp->uaflgs, ETHR_RWMTX_W_WAIT_FLG__);
+ }
+ else {
+ /* Should be very unusual */
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
+ tse_end = tse_tmp->prev;
+ got_all = 0;
+ break;
+ }
+
+ tse_tmp = tse_tmp->next;
+
+ } while (tse_tmp != cnd->q);
+
+ dequeue(&cnd->q, tse, tse_end);
+
+ ETHR_MTX_Q_UNLOCK(&cnd->qlck);
+
+ enqueue_mtx(mtx, tse, tse_end);
+ }
+
+ } while (!got_all);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(cnd);
+}
+
+int
+ethr_cond_wait(ethr_cond *cnd, ethr_mutex *mtx)
+{
+ int woken;
+ int scnt;
+ int res;
+ void *udata = NULL;
+ ethr_ts_event *tse;
+
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(!cnd);
+ ETHR_ASSERT(cnd->initialized == ETHR_COND_INITIALIZED);
+ ETHR_ASSERT(!mtx);
+ ETHR_ASSERT(mtx->initialized == ETHR_MUTEX_INITIALIZED);
+
+ tse = ethr_get_ts_event();
+
+ scnt = ((tse->iflgs & ETHR_TS_EV_MAIN_THR)
+ ? cnd->main_scnt
+ : cnd->aux_scnt);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(cnd);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
+
+ udata = tse->udata; /* Got to restore udata before returning */
+ tse->udata = (void *) mtx;
+
+ tse->uflgs = ETHR_RWMTX_W_WAIT_FLG__; /* Prep for mutex lock op */
+ ethr_atomic_set(&tse->uaflgs, ETHR_CND_WAIT_FLG__);
+
+ ETHR_MTX_Q_LOCK(&cnd->qlck);
+
+ enqueue(&cnd->q, tse, tse);
+
+ ETHR_MTX_Q_UNLOCK(&cnd->qlck);
+
+ ethr_mutex_unlock(mtx);
+
+ /* Wait */
+ woken = 0;
+ while (1) {
+ long act;
+
+ ethr_event_reset(&tse->event);
+
+ act = ethr_atomic_read_acqb(&tse->uaflgs);
+ if (!act)
+ break; /* Mtx locked */
+
+ /* First time, got EINTR, or spurious wakeup... */
+
+ ETHR_ASSERT(act == ETHR_CND_WAIT_FLG__
+ || act == ETHR_RWMTX_W_WAIT_FLG__);
+
+ if (woken) {
+ /*
+ * If act == ETHR_RWMTX_W_WAIT_FLG__, we have already been enqueued
+ * on the mutex; continue wait until locked...
+ */
+ if (act == ETHR_CND_WAIT_FLG__) {
+ ETHR_MTX_Q_LOCK(&cnd->qlck);
+ act = ethr_atomic_read(&tse->uaflgs);
+ ETHR_ASSERT(act == ETHR_CND_WAIT_FLG__
+ || act == ETHR_RWMTX_W_WAIT_FLG__);
+ /*
+ * If act == ETHR_RWMTX_W_WAIT_FLG__, we have already
+ * enqueued on the mutex; continue wait until locked...
+ */
+ if (act == ETHR_CND_WAIT_FLG__)
+ dequeue(&cnd->q, tse, tse);
+
+ ETHR_MTX_Q_UNLOCK(&cnd->qlck);
+
+ if (act == ETHR_CND_WAIT_FLG__) {
+ tse->udata = udata;
+ ethr_leave_ts_event(tse);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(cnd);
+ ethr_mutex_lock(mtx);
+ return EINTR;
+ }
+ }
+ ETHR_ASSERT(act == ETHR_RWMTX_W_WAIT_FLG__);
+ }
+ ethr_event_swait(&tse->event, scnt);
+ /* swait result: 0 || EINTR */
+ woken = 1;
+ }
+
+ ETHR_MTX_HARD_DEBUG_LFS_RWLOCK(&mtx->mtxb);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(cnd);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(mtx);
+
+ tse->udata = udata;
+ ethr_leave_ts_event(tse);
+ return 0;
+}
+
+#else
+/* -- pthread mutex and condition variables -------------------------------- */
+
+int
+ethr_mutex_init(ethr_mutex *mtx)
+{
+#if ETHR_XCHK
+ if (!mtx) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+ mtx->initialized = ETHR_MUTEX_INITIALIZED;
+#endif
+ return pthread_mutex_init(&mtx->pt_mtx, NULL);
+}
+
+int
+ethr_mutex_destroy(ethr_mutex *mtx)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!mtx || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+#endif
+#if ETHR_XCHK
+ mtx->initialized = 0;
+#endif
+ return pthread_mutex_destroy(&mtx->pt_mtx);
+}
+
+int
+ethr_cond_init(ethr_cond *cnd)
+{
+#if ETHR_XCHK
+ if (!cnd) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+ cnd->initialized = ETHR_COND_INITIALIZED;
+#endif
+ return pthread_cond_init(&cnd->pt_cnd, NULL);
+}
+
+int
+ethr_cond_destroy(ethr_cond *cnd)
+{
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!cnd || cnd->initialized != ETHR_COND_INITIALIZED) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+ cnd->initialized = 0;
+#endif
+ return pthread_cond_destroy(&cnd->pt_cnd);
+}
+
+void
+ethr_cond_signal(ethr_cond *cnd)
+{
+ int res;
+
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(cnd);
+ ETHR_ASSERT(cnd->initialized == ETHR_COND_INITIALIZED);
+
+ res = pthread_cond_signal(&cnd->pt_cnd);
+ if (res != 0)
+ ETHR_FATAL_ERROR__(res);
+}
+
+void
+ethr_cond_broadcast(ethr_cond *cnd)
+{
+ int res;
+
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(cnd);
+ ETHR_ASSERT(cnd->initialized == ETHR_COND_INITIALIZED);
+
+ res = pthread_cond_broadcast(&cnd->pt_cnd);
+ if (res != 0)
+ ETHR_FATAL_ERROR__(res);
+}
+
+int
+ethr_cond_wait(ethr_cond *cnd, ethr_mutex *mtx)
+{
+ int res;
+
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(cnd);
+ ETHR_ASSERT(cnd->initialized == ETHR_COND_INITIALIZED);
+ ETHR_ASSERT(mtx);
+ ETHR_ASSERT(mtx->initialized == ETHR_MUTEX_INITIALIZED);
+
+ res = pthread_cond_wait(&cnd->pt_cnd, &mtx->pt_mtx);
+ if (res != 0 && res != EINTR)
+ ETHR_FATAL_ERROR__(res);
+ return res;
+}
+
+#endif /* pthread_mutex */
+
+/* -- Exported symbols of inline functions --------------------------------- */
+
+int
+ethr_mutex_trylock(ethr_mutex *mtx)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(mtx);
+ ETHR_ASSERT(mtx->initialized == ETHR_MUTEX_INITIALIZED);
+
+ return ethr_mutex_trylock__(mtx);
+}
+
+void
+ethr_mutex_lock(ethr_mutex *mtx)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(mtx);
+ ETHR_ASSERT(mtx->initialized == ETHR_MUTEX_INITIALIZED);
+
+ ethr_mutex_lock__(mtx);
+}
+
+void
+ethr_mutex_unlock(ethr_mutex *mtx)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(mtx);
+ ETHR_ASSERT(mtx->initialized == ETHR_MUTEX_INITIALIZED);
+
+ ethr_mutex_unlock__(mtx);
+}
+
+
+#ifdef ETHR_USE_OWN_RWMTX_IMPL__
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
+ * Read/Write Mutex *
+\* */
+
+static void
+wake_readers(ethr_rwmutex *rwmtx, int rs)
+{
+ ethr_ts_event *tse;
+#ifdef ETHR_DEBUG
+ int drs = 0;
+#endif
+
+ tse = rwmtx->mtxb.q;
+ ETHR_ASSERT(tse);
+ ETHR_ASSERT(rwmtx->rq_end);
+ dequeue(&rwmtx->mtxb.q, tse, rwmtx->rq_end);
+ rwmtx->rq_end->next = NULL;
+ rwmtx->rq_end = NULL;
+
+ ETHR_ASSERT(!rwmtx->mtxb.q
+ || (ethr_atomic_read(&rwmtx->mtxb.q->uaflgs)
+ == ETHR_RWMTX_W_WAIT_FLG__));
+
+ ETHR_RWMTX_HARD_DEBUG_CHK_Q(rwmtx);
+ ETHR_MTX_Q_UNLOCK(&rwmtx->mtxb.qlck);
+
+ while (tse) {
+ ethr_ts_event *tse_next;
+
+#ifdef ETHR_DEBUG
+ ETHR_ASSERT(tse->uflgs == ETHR_RWMTX_R_WAIT_FLG__);
+ ETHR_ASSERT(ethr_atomic_read(&tse->uaflgs)
+ == ETHR_RWMTX_R_WAIT_FLG__);
+ drs++;
+#endif
+
+ tse_next = tse->next; /* we aren't allowed to read tse->next
+ after we have reset uaflgs */
+
+ ethr_atomic_set(&tse->uaflgs, 0);
+ ethr_event_set(&tse->event);
+ tse = tse_next;
+ }
+
+ ETHR_ASSERT(rs == drs);
+}
+
+static ETHR_INLINE int
+is_w_waiter(ethr_ts_event *tse)
+{
+ ETHR_ASSERT(tse->uflgs == ETHR_RWMTX_W_WAIT_FLG__
+ || tse->uflgs == ETHR_RWMTX_R_WAIT_FLG__);
+ return tse->uflgs == ETHR_RWMTX_W_WAIT_FLG__;
+}
+
+static ETHR_INLINE int
+multiple_w_waiters(ethr_rwmutex *rwmtx)
+{
+ ETHR_ASSERT(rwmtx->mtxb.q);
+ ETHR_ASSERT(rwmtx->mtxb.q->uflgs == ETHR_RWMTX_W_WAIT_FLG__);
+
+ if (!rwmtx->rq_end)
+ return rwmtx->mtxb.q->next != rwmtx->mtxb.q;
+ else {
+ ETHR_ASSERT(rwmtx->mtxb.q->next != rwmtx->mtxb.q);
+ if (rwmtx->mtxb.q->next->uflgs == ETHR_RWMTX_W_WAIT_FLG__)
+ return 1;
+ ETHR_ASSERT(rwmtx->rq_end->next == rwmtx->mtxb.q
+ || rwmtx->rq_end->next->uflgs == ETHR_RWMTX_W_WAIT_FLG__);
+ return rwmtx->rq_end->next != rwmtx->mtxb.q;
+ }
+}
+
+int check_readers_array(ethr_rwmutex *rwmtx,
+ int start_rix,
+ int length,
+ int pre_check)
+{
+ int ix = start_rix;
+
+#ifndef ETHR_READ_MEMORY_BARRIER_IS_FULL
+ if (pre_check)
+ ETHR_READ_MEMORY_BARRIER;
+ else
+#endif
+ ETHR_MEMORY_BARRIER;
+
+ do {
+ long act = rwmutex_freqread_rdrs_read(rwmtx, ix);
+ if (act != 0)
+ return EBUSY;
+ ix++;
+ if (ix == length)
+ ix = 0;
+ } while (ix != start_rix);
+
+ return 0;
+}
+
+static ETHR_INLINE void
+rwmutex_freqread_restore_failed_tryrlock(ethr_rwmutex *rwmtx,
+ ethr_ts_event *tse)
+{
+ long act;
+ /*
+ * Restore failed increment
+ */
+ act = rwmutex_freqread_rdrs_dec_read(rwmtx, tse);
+
+ ETHR_WRITE_MEMORY_BARRIER;
+
+ if (act == 0) {
+
+#ifndef ETHR_WRITE_MEMORY_BARRIER_IS_FULL
+ ETHR_READ_MEMORY_BARRIER;
+#endif
+
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+
+ if ((act & ETHR_RWMTX_W_FLG__) == 0
+ && act & (ETHR_RWMTX_WAIT_FLGS__|ETHR_RWMTX_R_PEND_UNLCK_MASK__)) {
+ /*
+ * We either got waiters, or someone else trying
+ * to read unlock which we might have to help.
+ */
+ rwmutex_try_complete_runlock(rwmtx, act, tse, 1, 1, 0);
+ }
+ }
+}
+
+static int
+rwmutex_try_complete_runlock(ethr_rwmutex *rwmtx,
+ long initial,
+ ethr_ts_event *tse,
+ int start_next_ix,
+ int check_before_try,
+ int try_write_lock)
+{
+ ethr_ts_event *tse_tmp;
+ long act = initial;
+ int six, res, length;
+
+ tse_tmp = tse;
+ if (!tse_tmp)
+ tse_tmp = ethr_get_ts_event();
+
+ if ((act & ETHR_RWMTX_WAIT_FLGS__)
+ && (act & ~ETHR_RWMTX_WAIT_FLGS__) == 0)
+ goto check_waiters;
+
+ if (rwmtx->type == ETHR_RWMUTEX_TYPE_FREQUENT_READ) {
+ length = reader_groups_array_size;
+ six = tse_tmp->rgix;
+ }
+ else {
+ length = main_threads_array_size;
+ six = tse_tmp->mtix;
+ }
+ if (start_next_ix) {
+ six++;
+ if (six >= length)
+ six = 0;
+ }
+
+ if (!tse)
+ ethr_leave_ts_event(tse_tmp);
+
+ if (check_before_try) {
+ res = check_readers_array(rwmtx, six, length, 1);
+ if (res == EBUSY)
+ return try_write_lock ? EBUSY : 0;
+ }
+
+ while (1) {
+ long exp = act;
+ long new = act+1;
+
+ ETHR_ASSERT((act & ETHR_RWMTX_R_PEND_UNLCK_MASK__)
+ < ETHR_RWMTX_R_PEND_UNLCK_MASK__);
+
+ act = ethr_atomic_cmpxchg(&rwmtx->mtxb.flgs, new, exp);
+ if (exp == act) {
+ act = new;
+ break;
+ }
+ if (!try_write_lock) {
+ if (act == ETHR_RWMTX_W_FLG__ || act == 0)
+ return 0;
+ if ((act & ETHR_RWMTX_WAIT_FLGS__) == 0) {
+ if ((act & ETHR_RWMTX_R_FLG__) == 0)
+ return 0;
+ }
+ else if ((act & ETHR_RWMTX_R_FLG__) == 0) {
+ if (act & ETHR_RWMTX_R_PEND_UNLCK_MASK__)
+ return 0;
+ goto check_waiters;
+ }
+ }
+ else {
+ if (act == 0)
+ goto tryrwlock;
+ if (act & (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_WAIT_FLGS__))
+ return EBUSY;
+ }
+ }
+
+ res = check_readers_array(rwmtx, six, length, 0);
+ if (res == EBUSY) {
+ act = ethr_atomic_dec_read(&rwmtx->mtxb.flgs);
+ if (act & ETHR_RWMTX_R_MASK__)
+ return try_write_lock ? EBUSY : 0;
+ }
+ else {
+ while (1) {
+ long exp = act;
+ long new = act;
+ new &= ~ETHR_RWMTX_R_FLG__;
+ new--;
+
+ ETHR_ASSERT(act & ETHR_RWMTX_R_PEND_UNLCK_MASK__);
+
+ act = ethr_atomic_cmpxchg(&rwmtx->mtxb.flgs, new, exp);
+ if (exp == act) {
+ if (new & ETHR_RWMTX_R_PEND_UNLCK_MASK__)
+ return try_write_lock ? EBUSY : 0;
+ act = new;
+ break;
+ }
+ }
+ }
+
+ /*
+ * Read unlock completed, but we have to check if
+ * threads have to be woken (or if we should try
+ * to write lock it).
+ */
+
+ if (act & ETHR_RWMTX_W_FLG__)
+ return try_write_lock ? EBUSY : 0;
+
+ if (act & ETHR_RWMTX_WAIT_FLGS__) {
+ check_waiters:
+ rwmutex_unlock_wake(rwmtx, 0, act);
+ return try_write_lock ? EBUSY : 0;
+ }
+
+ if (!try_write_lock)
+ return 0;
+
+ tryrwlock:
+ /* Try to write lock it */
+
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs,
+ ETHR_RWMTX_W_FLG__,
+ 0);
+ return act == 0 ? 0 : EBUSY;
+}
+
+#ifdef ETHR_RLOCK_WITH_INC_DEC
+
+static ETHR_INLINE void
+rwmutex_incdec_restore_failed_tryrlock(ethr_rwmutex *rwmtx)
+{
+ long act;
+ /*
+ * Restore failed increment
+ */
+ act = ethr_atomic_dec_read(&rwmtx->mtxb.flgs);
+ if ((act & ETHR_RWMTX_WAIT_FLGS__)
+ && (act & ~ETHR_RWMTX_WAIT_FLGS__) == 0) {
+ rwmutex_unlock_wake(rwmtx, 0, act);
+ }
+}
+
+#endif
+
+static void
+rwmutex_normal_rlock_wait(ethr_rwmutex *rwmtx,
+ long initial)
+{
+ long act = initial, exp;
+ int scnt, start_scnt;
+ ethr_ts_event *tse = NULL;
+ int until_yield = ETHR_YIELD_AFTER_BUSY_LOOPS;
+
+ start_scnt = scnt = initial_spincount(&rwmtx->mtxb);
+
+ /*
+ * Spin trying to read lock for a while. If unsuccessful,
+ * wait on event.
+ */
+
+ while (1) {
+
+#ifdef ETHR_RLOCK_WITH_INC_DEC
+ rwmutex_incdec_restore_failed_tryrlock(rwmtx);
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+#endif
+
+ while (act & (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__)) {
+ if (scnt == 0) {
+ tse = ethr_get_ts_event();
+ if (update_spincount(&rwmtx->mtxb, tse, &start_scnt, &scnt)) {
+ event_wait(&rwmtx->mtxb, tse, scnt,
+ ETHR_RWMTX_R_WAIT_FLG__, 1, 0);
+ goto done;
+ }
+ }
+ ETHR_SPIN_BODY;
+ if (--until_yield == 0) {
+ until_yield = ETHR_YIELD_AFTER_BUSY_LOOPS;
+ ETHR_YIELD();
+ }
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+ scnt--;
+ }
+ exp = act;
+ ETHR_ASSERT(scnt >= 0);
+
+#ifdef ETHR_RLOCK_WITH_INC_DEC
+ act = ethr_atomic_inc_read(&rwmtx->mtxb.flgs);
+ if ((act & (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__)) == 0)
+ goto done; /* Got it */
+#else
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs, exp+1, exp);
+ if (act == exp)
+ goto done; /* Got it */
+#endif
+ }
+
+ done:
+ if (tse)
+ ethr_leave_ts_event(tse);
+}
+
+static void
+rwmutex_freqread_rlock_wait(ethr_rwmutex *rwmtx,
+ ethr_ts_event *tse,
+ long initial)
+{
+ long act = initial;
+ int scnt, start_scnt;
+ int until_yield = ETHR_YIELD_AFTER_BUSY_LOOPS;
+
+ start_scnt = scnt = initial_spincount(&rwmtx->mtxb);
+
+ /*
+ * Spin trying to read lock for a while. If unsuccessful,
+ * wait on event.
+ */
+
+ while (1) {
+
+ rwmutex_freqread_restore_failed_tryrlock(rwmtx, tse);
+
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+
+ while (act & ~(ETHR_RWMTX_R_FLG__|ETHR_RWMTX_R_WAIT_FLG__)) {
+ if (scnt == 0) {
+ if (update_spincount(&rwmtx->mtxb, tse, &start_scnt, &scnt)) {
+ event_wait(&rwmtx->mtxb, tse, scnt,
+ ETHR_RWMTX_R_WAIT_FLG__, 1, 1);
+ return; /* Got it */
+ }
+ }
+ ETHR_SPIN_BODY;
+ if (--until_yield == 0) {
+ until_yield = ETHR_YIELD_AFTER_BUSY_LOOPS;
+ ETHR_YIELD();
+ }
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+ scnt--;
+ }
+
+ ETHR_ASSERT(scnt >= 0);
+
+ rwmutex_freqread_rdrs_inc(rwmtx, tse);
+
+ ETHR_MEMORY_BARRIER;
+
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+
+ if (act == ETHR_RWMTX_R_FLG__)
+ return; /* Got it */
+
+ while (1) {
+ long exp, new;
+
+ if (act & ~(ETHR_RWMTX_R_FLG__|ETHR_RWMTX_R_WAIT_FLG__))
+ break; /* Busy (need to restore inc) */
+
+ if (act & ETHR_RWMTX_R_FLG__)
+ return; /* Got it */
+
+ exp = act;
+ new = act | ETHR_RWMTX_R_FLG__;
+ act = ethr_atomic_cmpxchg(&rwmtx->mtxb.flgs, new, exp);
+ if (act == exp)
+ return; /* Got it */
+ }
+ }
+}
+
+static void
+rwmutex_normal_rwlock_wait(ethr_rwmutex *rwmtx, long initial)
+{
+ write_lock_wait(&rwmtx->mtxb, initial, 1, 0);
+}
+
+static void
+rwmutex_freqread_rwlock_wait(ethr_rwmutex *rwmtx, long initial)
+{
+ write_lock_wait(&rwmtx->mtxb, initial, 1, 1);
+}
+
+static ETHR_INLINE void
+rwlock_wake_set_flags(ethr_rwmutex *rwmtx, long new_initial, int act_initial)
+{
+ long act, act_mask;
+ if (rwmtx->type != ETHR_RWMUTEX_TYPE_NORMAL) {
+ /* r pend unlock mask may vary and must be retained */
+ act_mask = ETHR_RWMTX_R_PEND_UNLCK_MASK__;
+ }
+ else {
+#ifdef ETHR_RLOCK_WITH_INC_DEC
+ /* rs mask may vary and must be retained */
+ act_mask = ETHR_RWMTX_RS_MASK__;
+#else
+ /* rs mask always zero */
+ ETHR_ASSERT((act_initial & ETHR_RWMTX_RS_MASK__) == 0);
+ ethr_atomic_set(&rwmtx->mtxb.flgs, new_initial);
+ return;
+#endif
+ }
+
+ act = act_initial;
+ while (1) {
+ long exp = act;
+ long new = new_initial + (act & act_mask);
+ act = ethr_atomic_cmpxchg(&rwmtx->mtxb.flgs, new, exp);
+ if (act == exp)
+ break;
+ exp = act;
+ }
+}
+
+#ifdef ETHR_DEBUG
+
+static void
+dbg_unlock_wake(ethr_rwmutex *rwmtx,
+ int have_w,
+ ethr_ts_event *tse)
+{
+ long exp, act, imask;
+
+ exp = have_w ? ETHR_RWMTX_W_FLG__ : 0;
+
+ if (rwmtx->type != ETHR_RWMUTEX_TYPE_NORMAL)
+ imask = ETHR_RWMTX_R_PEND_UNLCK_MASK__;
+ else {
+#ifdef ETHR_RLOCK_WITH_INC_DEC
+ imask = ETHR_RWMTX_RS_MASK__;
+#else
+ imask = 0;
+#endif
+ }
+
+ ETHR_ASSERT(tse);
+
+ if (is_w_waiter(tse)) {
+
+ exp |= ETHR_RWMTX_W_WAIT_FLG__;
+ if (rwmtx->rq_end) {
+ exp |= ETHR_RWMTX_R_WAIT_FLG__;
+ }
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+ ETHR_ASSERT((exp & ~imask) == (act & ~imask));
+
+ ETHR_RWMTX_HARD_DEBUG_CHK_Q(rwmtx);
+
+ }
+ else {
+
+ exp |= ETHR_RWMTX_R_WAIT_FLG__;
+ if (rwmtx->rq_end->next != rwmtx->mtxb.q)
+ exp |= ETHR_RWMTX_W_WAIT_FLG__;
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+ ETHR_ASSERT((exp & ~imask) == (act & ~imask));
+
+ ETHR_RWMTX_HARD_DEBUG_CHK_Q(rwmtx);
+
+ }
+}
+
+#endif
+
+static void
+rwmutex_unlock_wake(ethr_rwmutex *rwmtx, int have_w, long initial)
+{
+ long new, act = initial;
+ ethr_ts_event *tse;
+
+ if ((act & ETHR_RWMTX_WAIT_FLGS__) == 0) {
+ if (!have_w)
+ return;
+ else {
+ while ((act & ETHR_RWMTX_WAIT_FLGS__) == 0) {
+ long exp = act;
+ new = exp & ~ETHR_RWMTX_W_FLG__;
+ act = ethr_atomic_cmpxchg(&rwmtx->mtxb.flgs, new, exp);
+ if (act == exp)
+ return;
+ }
+ }
+ }
+
+ ETHR_MTX_Q_LOCK(&rwmtx->mtxb.qlck);
+ tse = rwmtx->mtxb.q;
+
+ if (!have_w) {
+ if (!tse) {
+#ifdef ETHR_DEBUG
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+ ETHR_ASSERT((act & ETHR_RWMTX_WAIT_FLGS__) == 0);
+#endif
+ goto already_served;
+ }
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+ if (act & ~ETHR_RWMTX_WAIT_FLGS__) {
+ already_served:
+ ETHR_MTX_Q_UNLOCK(&rwmtx->mtxb.qlck);
+ return;
+ }
+ }
+
+#ifdef ETHR_DEBUG
+ dbg_unlock_wake(rwmtx, have_w, tse);
+#endif
+
+ if (is_w_waiter(tse)) {
+
+ if (!have_w) {
+ act = ethr_atomic_read_bor(&rwmtx->mtxb.flgs,
+ ETHR_RWMTX_W_FLG__);
+ ETHR_ASSERT((act & ~ETHR_RWMTX_WAIT_FLGS__) == 0);
+ ETHR_ASSERT(act & ETHR_RWMTX_W_WAIT_FLG__);
+ act |= ETHR_RWMTX_W_FLG__;
+ }
+
+ /*
+ * If we have multiple write waiters, there
+ * is no need to modify mtxb->flgs; otherwise,
+ * we need to clear the write wait bit...
+ */
+ if (!multiple_w_waiters(rwmtx)) {
+ new = ETHR_RWMTX_W_FLG__;
+ if (tse->next != rwmtx->mtxb.q) {
+ ETHR_ASSERT(tse->next->uflgs == ETHR_RWMTX_R_WAIT_FLG__);
+ new |= ETHR_RWMTX_R_WAIT_FLG__;
+ }
+
+ rwlock_wake_set_flags(rwmtx, new, act);
+ }
+
+ wake_writer(&rwmtx->mtxb, 1);
+ }
+ else {
+ int rs;
+
+ if (rwmtx->type == ETHR_RWMUTEX_TYPE_NORMAL) {
+ rs = rwmtx->tdata.rs;
+ new = (long) rs;
+ rwmtx->tdata.rs = 0;
+ }
+ else {
+ ethr_rwmutex_type type = rwmtx->type;
+ int length = (type == ETHR_RWMUTEX_TYPE_FREQUENT_READ
+ ? reader_groups_array_size
+ : main_threads_array_size);
+ int ix;
+
+ rs = 0;
+ for (ix = 0; ix < length; ix++) {
+ int wrs = rwmtx->tdata.ra[ix].data.waiting_readers;
+ rwmtx->tdata.ra[ix].data.waiting_readers = 0;
+ ETHR_ASSERT(wrs >= 0);
+ if (wrs) {
+ rs += wrs;
+ rwmutex_freqread_rdrs_add(rwmtx, type, ix, wrs);
+ }
+ }
+ new = ETHR_RWMTX_R_FLG__;
+ }
+
+ if (rwmtx->rq_end->next != rwmtx->mtxb.q)
+ new |= ETHR_RWMTX_W_WAIT_FLG__;
+
+ rwlock_wake_set_flags(rwmtx, new, act);
+ wake_readers(rwmtx, rs);
+ }
+}
+
+static ethr_rwmtx_readers_array__ *
+alloc_readers_array(int length, ethr_rwmutex_lived lived)
+{
+ ethr_rwmtx_readers_array__ *ra;
+ size_t sz;
+ void *mem;
+
+ sz = sizeof(ethr_rwmtx_readers_array__) * (length + 1);
+
+ switch (lived) {
+ case ETHR_RWMUTEX_LONG_LIVED:
+ mem = ethr_mem__.ll.alloc(sz);
+ break;
+ case ETHR_RWMUTEX_SHORT_LIVED:
+ mem = ethr_mem__.sl.alloc(sz);
+ break;
+ default:
+ mem = ethr_mem__.std.alloc(sz);
+ break;
+ }
+ if (!mem)
+ return NULL;
+
+ if ((((unsigned long) mem) & ETHR_CACHE_LINE_MASK) == 0) {
+ ra = (ethr_rwmtx_readers_array__ *) mem;
+ ra->data.byte_offset = 0;
+ }
+ else {
+ ra = ((ethr_rwmtx_readers_array__ *)
+ ((((unsigned long) mem) & ~ETHR_CACHE_LINE_MASK)
+ + ETHR_CACHE_LINE_SIZE));
+ ra->data.byte_offset = (int) ((unsigned long) ra
+ - (unsigned long) mem);
+ }
+ ra->data.lived = lived;
+ return ra;
+}
+
+static void
+free_readers_array(ethr_rwmtx_readers_array__ *ra)
+{
+ void *ptr = (void *) (((char *) ra) - ra->data.byte_offset);
+ switch (ra->data.lived) {
+ case ETHR_RWMUTEX_LONG_LIVED:
+ ethr_mem__.ll.free(ptr);
+ break;
+ case ETHR_RWMUTEX_SHORT_LIVED:
+ ethr_mem__.sl.free(ptr);
+ break;
+ default:
+ ethr_mem__.std.free(ptr);
+ break;
+ }
+}
+
+int
+ethr_rwmutex_init_opt(ethr_rwmutex *rwmtx, ethr_rwmutex_opt *opt)
+{
+ int res;
+ ethr_rwmtx_readers_array__ *ra = NULL;
+#if ETHR_XCHK
+ if (ethr_not_completely_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!rwmtx) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+ rwmtx->initialized = ETHR_RWMUTEX_INITIALIZED;
+#endif
+ ETHR_MTX_HARD_DEBUG_FENCE_INIT(rwmtx);
+ rwmtx->rq_end = NULL;
+ rwmtx->type = opt ? opt->type : ETHR_RWMUTEX_TYPE_NORMAL;
+ switch (rwmtx->type) {
+ case ETHR_RWMUTEX_TYPE_FREQUENT_READ:
+ if (main_threads_array_size <= reader_groups_array_size) {
+ /* No point using reader groups... */
+ rwmtx->type = ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ;
+ }
+ /* Fall through */
+ case ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ: {
+ int length;
+
+ length = (rwmtx->type == ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ
+ ? main_threads_array_size
+ : reader_groups_array_size);
+
+ if (length == 1) {
+ /* No point using a frequent reader type... */
+ rwmtx->type = ETHR_RWMUTEX_TYPE_NORMAL;
+ }
+ else {
+ int ix;
+ ra = alloc_readers_array(length,
+ (opt
+ ? opt->lived
+ : ETHR_RWMUTEX_UNKNOWN_LIVED));
+ if (!ra) {
+ res = ENOMEM;
+ goto error;
+ }
+
+ rwmtx->tdata.ra = ra;
+
+ for (ix = 0; ix < length; ix++) {
+ ethr_atomic_init(&rwmtx->tdata.ra[ix].data.readers, 0);
+ rwmtx->tdata.ra[ix].data.waiting_readers = 0;
+ }
+ break;
+ }
+ }
+ case ETHR_RWMUTEX_TYPE_NORMAL:
+ rwmtx->tdata.rs = 0;
+ break;
+ default:
+ res = EINVAL;
+ goto error;
+ }
+ res = mtxb_init(&rwmtx->mtxb,
+ default_rwmtx_main_spincount,
+ opt ? opt->main_spincount : -1,
+ default_rwmtx_aux_spincount,
+ opt ? opt->aux_spincount : -1);
+ if (res == 0)
+ return 0;
+
+ error:
+
+ if (ra)
+ free_readers_array(ra);
+
+#if ETHR_XCHK
+ rwmtx->initialized = 0;
+#endif
+ return res;
+}
+
+int
+ethr_rwmutex_init(ethr_rwmutex *rwmtx)
+{
+ return ethr_rwmutex_init_opt(rwmtx, NULL);
+}
+
+int
+ethr_rwmutex_destroy(ethr_rwmutex *rwmtx)
+{
+ int res;
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+#endif
+ if (rwmtx->type != ETHR_RWMUTEX_TYPE_NORMAL) {
+ long act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+ if (act == ETHR_RWMTX_R_FLG__)
+ rwmutex_try_complete_runlock(rwmtx, act, NULL, 0, 0, 0);
+ }
+ res = mtxb_destroy(&rwmtx->mtxb);
+ if (res != 0)
+ return res;
+ if (rwmtx->type != ETHR_RWMUTEX_TYPE_NORMAL)
+ free_readers_array(rwmtx->tdata.ra);
+#if ETHR_XCHK
+ rwmtx->initialized = 0;
+#endif
+ return 0;
+}
+
+#define ETHR_MAX_TRYRLOCK_TRIES 5
+
+int
+ethr_rwmutex_tryrlock(ethr_rwmutex *rwmtx)
+{
+ int res = 0;
+ long act;
+
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+
+ switch (rwmtx->type) {
+ case ETHR_RWMUTEX_TYPE_NORMAL: {
+#ifdef ETHR_RLOCK_WITH_INC_DEC
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+ if (act & (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__))
+ res = EBUSY;
+ else {
+ act = ethr_atomic_inc_read_acqb(&rwmtx->mtxb.flgs);
+ if (act & (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__)) {
+ rwmutex_incdec_restore_failed_tryrlock(rwmtx);
+ res = EBUSY;
+ }
+ }
+#else
+ long exp = 0;
+ int tries = 0;
+
+ while (1) {
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs, exp+1, exp);
+ if (act == exp) {
+ res = 0;
+ break;
+ }
+ if (tries > ETHR_MAX_TRYRLOCK_TRIES
+ || (act & (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__))) {
+ res = EBUSY;
+ break;
+ }
+ tries++;
+ exp = act;
+ }
+#endif
+ break;
+ }
+
+ case ETHR_RWMUTEX_TYPE_FREQUENT_READ:
+ case ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ: {
+ ethr_ts_event *tse = ethr_get_ts_event();
+
+ rwmutex_freqread_rdrs_inc(rwmtx, tse);
+
+ ETHR_MEMORY_BARRIER;
+
+ act = ethr_atomic_read_acqb(&rwmtx->mtxb.flgs);
+
+ if (act != ETHR_RWMTX_R_FLG__) {
+ while (1) {
+ long exp, new;
+
+ if (act & ~(ETHR_RWMTX_R_FLG__|ETHR_RWMTX_R_WAIT_FLG__)) {
+ rwmutex_freqread_restore_failed_tryrlock(rwmtx, tse);
+ res = EBUSY;
+ break;
+ }
+
+ if (act & ETHR_RWMTX_R_FLG__)
+ break;
+
+ exp = act;
+ new = act | ETHR_RWMTX_R_FLG__;
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs, new, exp);
+ if (act == exp)
+ break;
+ }
+ }
+
+ ethr_leave_ts_event(tse);
+ break;
+ }
+ }
+
+ ETHR_MTX_HARD_DEBUG_LFS_TRYRLOCK(&rwmtx->mtxb, res);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+
+ return res;
+}
+
+void
+ethr_rwmutex_rlock(ethr_rwmutex *rwmtx)
+{
+ long act;
+
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+
+ switch (rwmtx->type) {
+ case ETHR_RWMUTEX_TYPE_NORMAL: {
+#ifdef ETHR_RLOCK_WITH_INC_DEC
+ act = ethr_atomic_inc_read_acqb(&rwmtx->mtxb.flgs);
+ if (act & (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__))
+ rwmutex_normal_rlock_wait(rwmtx, act);
+#else
+ long exp = 0;
+
+ while (1) {
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs, exp+1, exp);
+ if (act == exp) {
+ break;
+ }
+
+ if (act & (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_W_WAIT_FLG__)) {
+ rwmutex_normal_rlock_wait(rwmtx, act);
+ break;
+ }
+ exp = act;
+ }
+#endif
+ break;
+ }
+
+ case ETHR_RWMUTEX_TYPE_FREQUENT_READ:
+ case ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ: {
+ ethr_ts_event *tse = ethr_get_ts_event();
+
+ rwmutex_freqread_rdrs_inc(rwmtx, tse);
+
+ ETHR_MEMORY_BARRIER;
+
+ act = ethr_atomic_read_acqb(&rwmtx->mtxb.flgs);
+
+ if (act != ETHR_RWMTX_R_FLG__) {
+ while (1) {
+ long exp, new;
+
+ if (act & ~(ETHR_RWMTX_R_FLG__|ETHR_RWMTX_R_WAIT_FLG__)) {
+ rwmutex_freqread_rlock_wait(rwmtx, tse, act);
+ break;
+ }
+
+ if (act & ETHR_RWMTX_R_FLG__)
+ break;
+
+ exp = act;
+ new = act | ETHR_RWMTX_R_FLG__;
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs, new, exp);
+ if (act == exp)
+ break;
+ }
+ }
+
+ ethr_leave_ts_event(tse);
+ break;
+ }
+ }
+
+ ETHR_MTX_HARD_DEBUG_LFS_RLOCK(&rwmtx->mtxb);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+}
+
+void
+ethr_rwmutex_runlock(ethr_rwmutex *rwmtx)
+{
+ long act;
+
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+ ETHR_MTX_HARD_DEBUG_LFS_RUNLOCK(&rwmtx->mtxb);
+
+ switch (rwmtx->type) {
+ case ETHR_RWMUTEX_TYPE_NORMAL:
+ act = ethr_atomic_dec_read_relb(&rwmtx->mtxb.flgs);
+ if ((act & ETHR_RWMTX_WAIT_FLGS__)
+ && (act & ~ETHR_RWMTX_WAIT_FLGS__) == 0) {
+ ETHR_ASSERT((act & ETHR_RWMTX_W_FLG__) == 0);
+ rwmutex_unlock_wake(rwmtx, 0, act);
+ }
+ break;
+
+ case ETHR_RWMUTEX_TYPE_FREQUENT_READ:
+ case ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ: {
+ ethr_ts_event *tse = ethr_get_ts_event();
+
+ act = rwmutex_freqread_rdrs_dec_read_relb(rwmtx, tse);
+
+ ETHR_ASSERT(act >= 0);
+
+ ETHR_WRITE_MEMORY_BARRIER;
+
+ if (act == 0) {
+
+#ifndef ETHR_WRITE_MEMORY_BARRIER_IS_FULL
+ ETHR_READ_MEMORY_BARRIER;
+#endif
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+
+ if ((act & ETHR_RWMTX_W_FLG__) == 0
+ && (act & (ETHR_RWMTX_WAIT_FLGS__
+ | ETHR_RWMTX_R_PEND_UNLCK_MASK__))) {
+ rwmutex_try_complete_runlock(rwmtx, act, tse, 1, 0, 0);
+ }
+
+ }
+
+ ethr_leave_ts_event(tse);
+ break;
+ }
+ }
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+}
+
+int
+ethr_rwmutex_tryrwlock(ethr_rwmutex *rwmtx)
+{
+ int res = 0;
+ long act;
+
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+
+ switch (rwmtx->type) {
+ case ETHR_RWMUTEX_TYPE_NORMAL:
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs,
+ ETHR_RWMTX_W_FLG__, 0);
+ if (act != 0)
+ res = EBUSY;
+ break;
+
+ case ETHR_RWMUTEX_TYPE_FREQUENT_READ:
+ case ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ:
+
+ res = 0;
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+
+ do {
+
+ if (act & (ETHR_RWMTX_W_FLG__|ETHR_RWMTX_WAIT_FLGS__)) {
+ res = EBUSY;
+ break;
+ }
+
+ if (act & ETHR_RWMTX_R_MASK__) {
+ res = rwmutex_try_complete_runlock(rwmtx, act, NULL,
+ 0, 1, 1);
+ break;
+ }
+
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs,
+ ETHR_RWMTX_W_FLG__, 0);
+
+ } while (act != 0);
+
+ break;
+ }
+
+ ETHR_MTX_HARD_DEBUG_LFS_TRYRWLOCK(&rwmtx->mtxb, res);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+
+ return res;
+}
+
+void
+ethr_rwmutex_rwlock(ethr_rwmutex *rwmtx)
+{
+ long act;
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+
+ switch (rwmtx->type) {
+ case ETHR_RWMUTEX_TYPE_NORMAL:
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs,
+ ETHR_RWMTX_W_FLG__, 0);
+ if (act != 0)
+ rwmutex_normal_rwlock_wait(rwmtx, act);
+ break;
+
+ case ETHR_RWMUTEX_TYPE_FREQUENT_READ:
+ case ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ:
+
+ act = ethr_atomic_read(&rwmtx->mtxb.flgs);
+
+ do {
+
+ if (act != 0) {
+ rwmutex_freqread_rwlock_wait(rwmtx, act);
+ break;
+ }
+
+ act = ethr_atomic_cmpxchg_acqb(&rwmtx->mtxb.flgs,
+ ETHR_RWMTX_W_FLG__, 0);
+
+ } while (act != 0);
+
+ break;
+ }
+
+ ETHR_MTX_HARD_DEBUG_LFS_RWLOCK(&rwmtx->mtxb);
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+
+}
+
+void
+ethr_rwmutex_rwunlock(ethr_rwmutex *rwmtx)
+{
+ long act;
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+ ETHR_MTX_HARD_DEBUG_LFS_RWUNLOCK(&rwmtx->mtxb);
+
+ switch (rwmtx->type) {
+ case ETHR_RWMUTEX_TYPE_NORMAL:
+ act = ethr_atomic_cmpxchg_relb(&rwmtx->mtxb.flgs,
+ 0, ETHR_RWMTX_W_FLG__);
+ if (act != ETHR_RWMTX_W_FLG__)
+ rwmutex_unlock_wake(rwmtx, 1, act);
+ break;
+
+ case ETHR_RWMUTEX_TYPE_FREQUENT_READ:
+ case ETHR_RWMUTEX_TYPE_EXTREMELY_FREQUENT_READ:
+ act = ethr_atomic_cmpxchg_relb(&rwmtx->mtxb.flgs, 0,
+ ETHR_RWMTX_W_FLG__);
+ if (act != ETHR_RWMTX_W_FLG__)
+ rwmutex_unlock_wake(rwmtx, 1, act);
+ break;
+ }
+
+ ETHR_MTX_HARD_DEBUG_FENCE_CHK(rwmtx);
+}
+
+#else
+/* -- pthread read/write mutex --------------------------------------------- */
+
+int
+ethr_rwmutex_init(ethr_rwmutex *rwmtx)
+{
+#if ETHR_XCHK
+ if (!rwmtx) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+ rwmtx->initialized = ETHR_RWMUTEX_INITIALIZED;
+#endif
+ return pthread_rwlock_init(&rwmtx->pt_rwlock, write_pref_attr);
+}
+
+int
+ethr_rwmutex_init_opt(ethr_rwmutex *rwmtx, ethr_rwmutex_opt *opt)
+{
+ return ethr_rwmutex_init(rwmtx);
+}
+
+int
+ethr_rwmutex_destroy(ethr_rwmutex *rwmtx)
+{
+ int res;
+#if ETHR_XCHK
+ if (ethr_not_inited__) {
+ ETHR_ASSERT(0);
+ return EACCES;
+ }
+ if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
+ ETHR_ASSERT(0);
+ return EINVAL;
+ }
+#endif
+ res = pthread_rwlock_destroy(&rwmtx->pt_rwlock);
+#if ETHR_XCHK
+ rwmtx->initialized = 0;
+#endif
+ return res;
+}
+
+/* -- Exported symbols of inline functions --------------------------------- */
+
+int
+ethr_rwmutex_tryrlock(ethr_rwmutex *rwmtx)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ return ethr_rwmutex_tryrlock__(rwmtx);
+}
+
+void
+ethr_rwmutex_rlock(ethr_rwmutex *rwmtx)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ ethr_rwmutex_rlock__(rwmtx);
+}
+
+void
+ethr_rwmutex_runlock(ethr_rwmutex *rwmtx)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ ethr_rwmutex_runlock__(rwmtx);
+}
+
+int
+ethr_rwmutex_tryrwlock(ethr_rwmutex *rwmtx)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ return ethr_rwmutex_tryrwlock__(rwmtx);
+}
+
+void
+ethr_rwmutex_rwlock(ethr_rwmutex *rwmtx)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ return ethr_rwmutex_rwlock__(rwmtx);
+}
+
+void
+ethr_rwmutex_rwunlock(ethr_rwmutex *rwmtx)
+{
+ ETHR_ASSERT(!ethr_not_inited__);
+ ETHR_ASSERT(rwmtx);
+ ETHR_ASSERT(rwmtx->initialized == ETHR_RWMUTEX_INITIALIZED);
+
+ ethr_rwmutex_rwunlock__(rwmtx);
+}
+
+#endif /* pthread */
+
+
+#if defined(ETHR_USE_OWN_RWMTX_IMPL__) || defined(ETHR_USE_OWN_MTX_IMPL__)
+
+#ifdef ETHR_MTX_HARD_DEBUG_Q
+static void
+hard_debug_chk_q__(struct ethr_mutex_base_ *mtxb, int is_rwmtx)
+{
+ int res;
+ long flgs = ethr_atomic_read(&mtxb->flgs);
+
+ ETHR_MTX_HARD_ASSERT(res == 0);
+
+ ETHR_MTX_HARD_ASSERT(!(flgs & ETHR_RWMTX_R_WAIT_FLG__) || is_rwmtx);
+
+ if (!(flgs & ETHR_RWMTX_WAIT_FLGS__)) {
+ ETHR_MTX_HARD_ASSERT(!mtxb->q);
+ if (is_rwmtx) {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ ETHR_MTX_HARD_ASSERT(!rwmtx->rq_end);
+ ETHR_MTX_HARD_ASSERT(!rwmtx->rs);
+ }
+ }
+ else {
+ ethr_ts_event *tse;
+ int ws = 0, rs = 0, rsf = 0, ref = 0;
+
+ ETHR_MTX_HARD_ASSERT(mtxb->q);
+
+ tse = mtxb->q;
+
+ do {
+ long type;
+
+ ETHR_MTX_HARD_ASSERT(tse->next->prev == tse);
+ ETHR_MTX_HARD_ASSERT(tse->prev->next == tse);
+
+ type = ethr_atomic_read(&tse->uaflgs);
+ ETHR_MTX_HARD_ASSERT(type == tse->uflgs);
+ switch (type) {
+ case ETHR_RWMTX_W_WAIT_FLG__:
+ ws++;
+ break;
+ case ETHR_RWMTX_R_WAIT_FLG__: {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ ETHR_MTX_HARD_ASSERT(is_rwmtx);
+ if (!rsf)
+ rsf = 1;
+ ETHR_MTX_HARD_ASSERT(!ref);
+ if (rwmtx->rq_end == tse) {
+ ETHR_MTX_HARD_ASSERT(
+ tse->next == rwmtx->mtxb.q
+ || tse->next->uflgs == ETHR_RWMTX_W_WAIT_FLG__);
+ ref = 1;
+ }
+ rs++;
+ break;
+ }
+ default:
+ ETHR_MTX_HARD_ASSERT(! "invalid wait type found");
+ }
+
+ tse = tse->next;
+ } while (tse != mtxb->q);
+
+ if (is_rwmtx) {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ ETHR_MTX_HARD_ASSERT(rs == rwmtx->rs);
+ }
+
+#ifdef ETHR_MTX_HARD_DEBUG_WSQ
+ ETHR_MTX_HARD_ASSERT(ws == mtxb->ws);
+#endif
+
+ if (flgs & ETHR_RWMTX_W_WAIT_FLG__)
+ ETHR_MTX_HARD_ASSERT(ws);
+ else
+ ETHR_MTX_HARD_ASSERT(!ws);
+
+ if (flgs & ETHR_RWMTX_R_WAIT_FLG__) {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ ETHR_MTX_HARD_ASSERT(is_rwmtx);
+ ETHR_MTX_HARD_ASSERT(rwmtx->rq_end);
+ ETHR_MTX_HARD_ASSERT(rsf);
+ ETHR_MTX_HARD_ASSERT(ref);
+ ETHR_MTX_HARD_ASSERT(rs);
+ }
+ else {
+ if (is_rwmtx) {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ ETHR_MTX_HARD_ASSERT(!rwmtx->rq_end);
+ }
+ ETHR_MTX_HARD_ASSERT(!rsf);
+ ETHR_MTX_HARD_ASSERT(!ref);
+ ETHR_MTX_HARD_ASSERT(!rs);
+ }
+ }
+}
+
+#elif defined(ETHR_MTX_HARD_DEBUG_WSQ)
+
+static void
+hard_debug_chk_q__(struct ethr_mutex_base_ *mtxb, int is_rwmtx)
+{
+ int ws = 0;
+ int rs = 0;
+
+ if (mtxb->q) {
+ ethr_ts_event *tse = mtxb->q;
+ do {
+ switch (tse->uflgs) {
+ case ETHR_RWMTX_W_WAIT_FLG__:
+ ws++;
+ break;
+ case ETHR_RWMTX_R_WAIT_FLG__:
+ rs++;
+ break;
+ default:
+ ETHR_MTX_HARD_ASSERT(0);
+ break;
+ }
+ tse = tse->next;
+ } while (tse != mtxb->q);
+ }
+
+ ETHR_MTX_HARD_ASSERT(mtxb->ws == ws);
+ if (is_rwmtx) {
+ ethr_rwmutex *rwmtx = (ethr_rwmutex *) mtxb;
+ ETHR_MTX_HARD_ASSERT(rwmtx->rs == rs);
+ }
+}
+
+#endif
+
+#endif
diff --git a/erts/lib_src/common/ethread.c b/erts/lib_src/common/ethread.c
deleted file mode 100644
index 9c88233934..0000000000
--- a/erts/lib_src/common/ethread.c
+++ /dev/null
@@ -1,3369 +0,0 @@
-/*
- * %CopyrightBegin%
- *
- * Copyright Ericsson AB 2004-2010. All Rights Reserved.
- *
- * The contents of this file are subject to the Erlang Public License,
- * Version 1.1, (the "License"); you may not use this file except in
- * compliance with the License. You should have received a copy of the
- * Erlang Public License along with this software. If not, it can be
- * retrieved online at http://www.erlang.org/.
- *
- * Software distributed under the License is distributed on an "AS IS"
- * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
- * the License for the specific language governing rights and limitations
- * under the License.
- *
- * %CopyrightEnd%
- */
-
-/*
- * Description: A Thread library for use in the ERTS and other OTP
- * applications.
- * Author: Rickard Green
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#undef ETHR_STACK_GUARD_SIZE
-
-#if defined(ETHR_PTHREADS)
-
-#ifdef ETHR_TIME_WITH_SYS_TIME
-# include <time.h>
-# include <sys/time.h>
-#else
-# ifdef ETHR_HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-#include <sys/types.h>
-#include <unistd.h>
-#include <signal.h>
-
-#ifdef ETHR_HAVE_PTHREAD_ATTR_SETGUARDSIZE
-# define ETHR_STACK_GUARD_SIZE (pagesize)
-#endif
-
-#elif defined(ETHR_WIN32_THREADS)
-
-#undef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
-#include <process.h>
-#include <winerror.h>
-
-#else
-#error "Missing thread implementation"
-#endif
-
-#include <limits.h>
-
-#define ETHR_FORCE_INLINE_FUNCS
-#define ETHR_INLINE_FUNC_NAME_(X) X ## __
-#include "ethread.h"
-
-#ifndef ETHR_HAVE_ETHREAD_DEFINES
-#error Missing configure defines
-#endif
-
-/*
- * ----------------------------------------------------------------------------
- * Common stuff
- * ----------------------------------------------------------------------------
- */
-
-#define ETHR_MAX_THREADS 2048 /* Has to be an even power of 2 */
-
-static int ethr_not_inited = 1;
-
-#define ASSERT(A) ETHR_ASSERT((A))
-
-static void *(*allocp)(size_t) = malloc;
-static void *(*reallocp)(void *, size_t) = realloc;
-static void (*freep)(void *) = free;
-
-#ifndef ETHR_HAVE_OPTIMIZED_ATOMIC_OPS
-ethr_atomic_protection_t ethr_atomic_protection__[1 << ETHR_ATOMIC_ADDR_BITS];
-#endif
-
-void *(*thread_create_prepare_func)(void) = NULL;
-void (*thread_create_parent_func)(void *) = NULL;
-void (*thread_create_child_func)(void *) = NULL;
-
-typedef struct ethr_xhndl_list_ ethr_xhndl_list;
-struct ethr_xhndl_list_ {
- ethr_xhndl_list *next;
- void (*funcp)(void);
-};
-
-static size_t pagesize;
-#define ETHR_PAGE_ALIGN(SZ) (((((size_t) (SZ)) - 1)/pagesize + 1)*pagesize)
-static size_t min_stack_size; /* kilo words */
-static size_t max_stack_size; /* kilo words */
-#define ETHR_B2KW(B) ((((size_t) (B)) - 1)/(sizeof(void *)*1024) + 1)
-#define ETHR_KW2B(KW) (((size_t) (KW))*sizeof(void *)*1024)
-
-ethr_mutex xhndl_mtx;
-ethr_xhndl_list *xhndl_list;
-
-static int
-init_common(ethr_init_data *id)
-{
- int res;
- if (id) {
- allocp = id->alloc;
- reallocp = id->realloc;
- freep = id->free;
- thread_create_prepare_func = id->thread_create_prepare_func;
- thread_create_parent_func = id->thread_create_parent_func;
- thread_create_child_func = id->thread_create_child_func;
- }
- if (!allocp || !reallocp || !freep)
- return EINVAL;
-
-#ifdef _SC_PAGESIZE
- pagesize = (size_t) sysconf(_SC_PAGESIZE);
-#elif defined(HAVE_GETPAGESIZE)
- pagesize = (size_t) getpagesize();
-#else
- pagesize = (size_t) 4*1024; /* Guess 4 KB */
-#endif
-
- /* User needs at least 4 KB */
- min_stack_size = 4*1024;
-#if SIZEOF_VOID_P == 8
- /* Double that on 64-bit archs */
- min_stack_size *= 2;
-#endif
- /* On some systems as much as about 4 KB is used by the system */
- min_stack_size += 4*1024;
- /* There should be room for signal handlers */
-#ifdef SIGSTKSZ
- min_stack_size += SIGSTKSZ;
-#else
- min_stack_size += pagesize;
-#endif
- /* The system may think that we need more stack */
-#if defined(PTHREAD_STACK_MIN)
- if (min_stack_size < PTHREAD_STACK_MIN)
- min_stack_size = PTHREAD_STACK_MIN;
-#elif defined(_SC_THREAD_STACK_MIN)
- {
- size_t thr_min_stk_sz = (size_t) sysconf(_SC_THREAD_STACK_MIN);
- if (min_stack_size < thr_min_stk_sz)
- min_stack_size = thr_min_stk_sz;
- }
-#endif
- /* The guard is at least on some platforms included in the stack size
- passed when creating threads */
-#ifdef ETHR_STACK_GUARD_SIZE
- min_stack_size += ETHR_STACK_GUARD_SIZE;
-#endif
- min_stack_size = ETHR_PAGE_ALIGN(min_stack_size);
-
- min_stack_size = ETHR_B2KW(min_stack_size);
-
- max_stack_size = 32*1024*1024;
-#if SIZEOF_VOID_P == 8
- max_stack_size *= 2;
-#endif
- max_stack_size = ETHR_B2KW(max_stack_size);
-
- xhndl_list = NULL;
-
- res = ethr_mutex_init(&xhndl_mtx);
- if (res != 0)
- return res;
-
- res = ethr_mutex_set_forksafe(&xhndl_mtx);
- if (res != 0 && res != ENOTSUP)
- return res;
-
- return 0;
-}
-
-int
-ethr_install_exit_handler(void (*funcp)(void))
-{
- ethr_xhndl_list *xhp;
- int res;
-
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
-
- if (!funcp)
- return EINVAL;
-
- xhp = (ethr_xhndl_list *) (*allocp)(sizeof(ethr_xhndl_list));
- if (!xhp)
- return ENOMEM;
-
- res = ethr_mutex_lock__(&xhndl_mtx);
- if (res != 0) {
- (*freep)((void *) xhp);
- return res;
- }
-
- xhp->funcp = funcp;
- xhp->next = xhndl_list;
- xhndl_list = xhp;
-
- res = ethr_mutex_unlock__(&xhndl_mtx);
- if (res != 0)
- abort();
-
- return res;
-}
-
-static void
-run_exit_handlers(void)
-{
- int res;
- ethr_xhndl_list *xhp;
-
- res = ethr_mutex_lock__(&xhndl_mtx);
- if (res != 0)
- abort();
-
- xhp = xhndl_list;
-
- res = ethr_mutex_unlock__(&xhndl_mtx);
- if (res != 0)
- abort();
-
- for (; xhp; xhp = xhp->next)
- (*xhp->funcp)();
-}
-
-#if defined(ETHR_PTHREADS)
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
- * pthread implementation *
-\* */
-
-typedef struct {
- pthread_mutex_t mtx;
- pthread_cond_t cnd;
- int initialized;
- void *(*thr_func)(void *);
- void *arg;
- void *prep_func_res;
-} thr_wrap_data_;
-
-static int no_ethreads;
-static ethr_mutex no_ethrs_mtx;
-
-#ifndef ETHR_HAVE_PTHREAD_ATFORK
-#define ETHR_HAVE_PTHREAD_ATFORK 0
-#endif
-
-#if !ETHR_HAVE_PTHREAD_ATFORK
-#warning "Cannot enforce fork-safety"
-#endif
-
-#ifdef ETHR_HAVE_PTHREAD_RWLOCK_INIT
-static pthread_rwlockattr_t write_pref_attr_data;
-static pthread_rwlockattr_t *write_pref_attr;
-#endif
-
-/*
- * ----------------------------------------------------------------------------
- * Static functions
- * ----------------------------------------------------------------------------
- */
-
-/*
- * Functions with safe_ prefix aborts on failure. To be used when
- * we cannot recover after failure.
- */
-
-static ETHR_INLINE void
-safe_mutex_lock(pthread_mutex_t *mtxp)
-{
- int res = pthread_mutex_lock(mtxp);
- if (res != 0)
- abort();
-}
-
-static ETHR_INLINE void
-safe_mutex_unlock(pthread_mutex_t *mtxp)
-{
- int res = pthread_mutex_unlock(mtxp);
- if (res != 0)
- abort();
-}
-
-static ETHR_INLINE void
-safe_cond_signal(pthread_cond_t *cndp)
-{
- int res = pthread_cond_signal(cndp);
- if (res != 0)
- abort();
-}
-
-#ifdef ETHR_HAVE_ETHR_REC_MUTEX_INIT
-
-static volatile int rec_mtx_attr_need_init = 1;
-static pthread_mutexattr_t rec_mtx_attr;
-
-static int init_rec_mtx_attr(void);
-
-#endif
-
-#if ETHR_HAVE_PTHREAD_ATFORK
-
-static ethr_mutex forksafe_mtx = ETHR_MUTEX_INITER;
-
-static void lock_mutexes(void)
-{
- ethr_mutex *m = &forksafe_mtx;
- do {
-
- safe_mutex_lock(&m->pt_mtx);
-
- m = m->next;
-
- } while (m != &forksafe_mtx);
-}
-
-static void unlock_mutexes(void)
-{
- ethr_mutex *m = forksafe_mtx.prev;
- do {
-
- safe_mutex_unlock(&m->pt_mtx);
-
- m = m->prev;
-
- } while (m->next != &forksafe_mtx);
-}
-
-#if ETHR_INIT_MUTEX_IN_CHILD_AT_FORK
-
-static void reinit_mutexes(void)
-{
- ethr_mutex *m = forksafe_mtx.prev;
- do {
- pthread_mutexattr_t *attrp = NULL;
-
-#ifdef ETHR_HAVE_ETHR_REC_MUTEX_INIT
- if (m->is_rec_mtx) {
- if (rec_mtx_attr_need_init) {
- int res = init_rec_mtx_attr();
- if (res != 0)
- abort();
- }
- attrp = &rec_mtx_attr;
- }
-#endif
- if (pthread_mutex_init(&m->pt_mtx, attrp) != 0)
- abort();
-
- m = m->prev;
-
- } while (m->next != &forksafe_mtx);
-}
-
-#endif
-
-static int
-init_forksafe(void)
-{
- static int init_done = 0;
- int res = 0;
-
- if (init_done)
- return res;
-
- forksafe_mtx.prev = &forksafe_mtx;
- forksafe_mtx.next = &forksafe_mtx;
-
- res = pthread_atfork(lock_mutexes,
- unlock_mutexes,
-#if ETHR_INIT_MUTEX_IN_CHILD_AT_FORK
- reinit_mutexes
-#else
- unlock_mutexes
-#endif
- );
-
- init_done = 1;
- return res;
-}
-
-#endif
-
-
-#ifdef ETHR_HAVE_ETHR_REC_MUTEX_INIT
-
-#if defined(ETHR_HAVE_PTHREAD_MUTEXATTR_SETTYPE)
-
-#define SET_REC_MUTEX_ATTR(AP) \
- pthread_mutexattr_settype((AP), PTHREAD_MUTEX_RECURSIVE);
-
-#elif defined(ETHR_HAVE_PTHREAD_MUTEXATTR_SETKIND_NP)
-
-#define SET_REC_MUTEX_ATTR(AP) \
- pthread_mutexattr_setkind_np((AP), PTHREAD_MUTEX_RECURSIVE_NP);
-
-#else
-
-#error "Don't know how to set recursive mutex attributes"
-
-#endif
-
-static int
-init_rec_mtx_attr(void)
-{
- int res, mres;
- static pthread_mutex_t attrinit_mtx = PTHREAD_MUTEX_INITIALIZER;
-
- mres = pthread_mutex_lock(&attrinit_mtx);
- if (mres != 0)
- return mres;
- /* Got here under race conditions; check again ... */
- if (!rec_mtx_attr_need_init)
- res = 0;
- else {
- res = pthread_mutexattr_init(&rec_mtx_attr);
- if (res == 0) {
- res = SET_REC_MUTEX_ATTR(&rec_mtx_attr);
- if (res == 0)
- rec_mtx_attr_need_init = 0;
- else
- (void) pthread_mutexattr_destroy(&rec_mtx_attr);
- }
- }
-
- mres = pthread_mutex_unlock(&attrinit_mtx);
- if (mres != 0)
- return mres;
- return res;
-}
-
-#endif /* #if ETHR_HAVE_ETHR_REC_MUTEX_INIT */
-
-static ETHR_INLINE void thr_exit_cleanup(void)
-{
- run_exit_handlers();
- safe_mutex_lock(&no_ethrs_mtx.pt_mtx);
- ASSERT(no_ethreads > 0);
- no_ethreads--;
- safe_mutex_unlock(&no_ethrs_mtx.pt_mtx);
-}
-
-static void *thr_wrapper(void *vtwd)
-{
- void *res;
- thr_wrap_data_ *twd = (thr_wrap_data_ *) vtwd;
- void *(*thr_func)(void *) = twd->thr_func;
- void *arg = twd->arg;
-
- safe_mutex_lock(&twd->mtx);
-
- if (thread_create_child_func)
- (*thread_create_child_func)(twd->prep_func_res);
-
- twd->initialized = 1;
-
- safe_cond_signal(&twd->cnd);
- safe_mutex_unlock(&twd->mtx);
-
- res = (*thr_func)(arg);
- thr_exit_cleanup();
- return res;
-}
-
-
-/*
- * ----------------------------------------------------------------------------
- * Exported functions
- * ----------------------------------------------------------------------------
- */
-
-int
-ethr_init(ethr_init_data *id)
-{
- int res;
-
- if (!ethr_not_inited)
- return EINVAL;
-
- ethr_not_inited = 0;
-
- res = init_common(id);
- if (res != 0)
- goto error;
-
-#if ETHR_HAVE_PTHREAD_ATFORK
- init_forksafe();
-#endif
-
- no_ethreads = 1;
- res = ethr_mutex_init(&no_ethrs_mtx);
- if (res != 0)
- goto error;
- res = ethr_mutex_set_forksafe(&no_ethrs_mtx);
- if (res != 0 && res != ENOTSUP)
- goto error;
-
-#ifndef ETHR_HAVE_OPTIMIZED_ATOMIC_OPS
- {
- int i;
- for (i = 0; i < (1 << ETHR_ATOMIC_ADDR_BITS); i++) {
-#ifdef ETHR_HAVE_PTHREAD_SPIN_LOCK
- res = pthread_spin_init(&ethr_atomic_protection__[i].u.spnlck, 0);
-#else
- res = ethr_mutex_init(&ethr_atomic_protection__[i].u.mtx);
-#endif
- if (res != 0)
- goto error;
- }
- }
-#endif
-
-#ifdef ETHR_HAVE_PTHREAD_RWLOCK_INIT
-#if defined(ETHR_HAVE_PTHREAD_RWLOCKATTR_SETKIND_NP) \
- && defined(ETHR_HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP)
- res = pthread_rwlockattr_init(&write_pref_attr_data);
- if (res != 0)
- goto error;
- res = pthread_rwlockattr_setkind_np(
- &write_pref_attr_data,
- PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
- if (res != 0)
- goto error;
- write_pref_attr = &write_pref_attr_data;
-#else
- write_pref_attr = NULL;
-#endif
-#endif
-
-
- return 0;
-
- error:
- ethr_not_inited = 1;
- return res;
-
-}
-
-int
-ethr_thr_create(ethr_tid *tid, void * (*func)(void *), void *arg,
- ethr_thr_opts *opts)
-{
- thr_wrap_data_ twd;
- pthread_attr_t attr;
- int res, dres;
- int use_stack_size = (opts && opts->suggested_stack_size >= 0
- ? opts->suggested_stack_size
- : -1 /* Use system default */);
-
-#ifdef ETHR_MODIFIED_DEFAULT_STACK_SIZE
- if (use_stack_size < 0)
- use_stack_size = ETHR_MODIFIED_DEFAULT_STACK_SIZE;
-#endif
-
- twd.initialized = 0;
- twd.thr_func = func;
- twd.arg = arg;
-
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!tid || !func) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
-
- /* Call prepare func if it exist */
- if (thread_create_prepare_func)
- twd.prep_func_res = (*thread_create_prepare_func)();
- else
- twd.prep_func_res = NULL;
-
- /* Set som thread attributes */
- res = pthread_attr_init(&attr);
- if (res != 0)
- goto cleanup_parent_func;
- res = pthread_mutex_init(&twd.mtx, NULL);
- if (res != 0)
- goto cleanup_attr_destroy;
- res = pthread_cond_init(&twd.cnd, NULL);
- if (res != 0)
- goto cleanup_mutex_destroy;
-
- /* Schedule child thread in system scope (if possible) ... */
- res = pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
- if (res != 0 && res != ENOTSUP)
- goto cleanup_cond_destroy;
-
- if (use_stack_size >= 0) {
- size_t suggested_stack_size = (size_t) use_stack_size;
- size_t stack_size;
-#ifdef DEBUG
- suggested_stack_size /= 2; /* Make sure we got margin */
-#endif
-#ifdef ETHR_STACK_GUARD_SIZE
- /* The guard is at least on some platforms included in the stack size
- passed when creating threads */
- suggested_stack_size += ETHR_B2KW(ETHR_STACK_GUARD_SIZE);
-#endif
- if (suggested_stack_size < min_stack_size)
- stack_size = ETHR_KW2B(min_stack_size);
- else if (suggested_stack_size > max_stack_size)
- stack_size = ETHR_KW2B(max_stack_size);
- else
- stack_size = ETHR_PAGE_ALIGN(ETHR_KW2B(suggested_stack_size));
- (void) pthread_attr_setstacksize(&attr, stack_size);
- }
-
-#ifdef ETHR_STACK_GUARD_SIZE
- (void) pthread_attr_setguardsize(&attr, ETHR_STACK_GUARD_SIZE);
-#endif
-
- /* Detached or joinable... */
- res = pthread_attr_setdetachstate(&attr,
- (opts && opts->detached
- ? PTHREAD_CREATE_DETACHED
- : PTHREAD_CREATE_JOINABLE));
- if (res != 0)
- goto cleanup_cond_destroy;
-
- res = pthread_mutex_lock(&twd.mtx);
-
- if (res != 0)
- goto cleanup_cond_destroy;
-
- safe_mutex_lock(&no_ethrs_mtx.pt_mtx);
- if (no_ethreads < ETHR_MAX_THREADS) {
- no_ethreads++;
- safe_mutex_unlock(&no_ethrs_mtx.pt_mtx);
- }
- else {
- res = EAGAIN;
- safe_mutex_unlock(&no_ethrs_mtx.pt_mtx);
- goto cleanup_mutex_unlock;
- }
-
- res = pthread_create((pthread_t *) tid, &attr, thr_wrapper, (void *) &twd);
-
- if (res != 0) {
- safe_mutex_lock(&no_ethrs_mtx.pt_mtx);
- ASSERT(no_ethreads > 0);
- no_ethreads--;
- safe_mutex_unlock(&no_ethrs_mtx.pt_mtx);
- }
- else {
-
- /* Wait for child to initialize... */
- while (!twd.initialized) {
- res = pthread_cond_wait(&twd.cnd, &twd.mtx);
- if (res != 0 && res != EINTR)
- break;
- }
-
- }
-
- /* Cleanup... */
- cleanup_mutex_unlock:
- dres = pthread_mutex_unlock(&twd.mtx);
- if (res == 0)
- res = dres;
- cleanup_cond_destroy:
- dres = pthread_cond_destroy(&twd.cnd);
- if (res == 0)
- res = dres;
- cleanup_mutex_destroy:
- dres = pthread_mutex_destroy(&twd.mtx);
- if (res == 0)
- res = dres;
- cleanup_attr_destroy:
- dres = pthread_attr_destroy(&attr);
- if (res == 0)
- res = dres;
- cleanup_parent_func:
- if (thread_create_parent_func)
- (*thread_create_parent_func)(twd.prep_func_res);
-
- return res;
-}
-
-int
-ethr_thr_join(ethr_tid tid, void **res)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
- return pthread_join((pthread_t) tid, res);
-}
-
-int
-ethr_thr_detach(ethr_tid tid)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
- return pthread_detach((pthread_t) tid);
-}
-
-void
-ethr_thr_exit(void *res)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return;
- }
-#endif
- thr_exit_cleanup();
- pthread_exit(res);
-}
-
-ethr_tid
-ethr_self(void)
-{
- return (ethr_tid) pthread_self();
-}
-
-int
-ethr_equal_tids(ethr_tid tid1, ethr_tid tid2)
-{
- return pthread_equal((pthread_t) tid1, (pthread_t) tid2);
-}
-
-
-/*
- * Mutex functions
- */
-
-
-int
-ethr_mutex_init(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx) {
- ASSERT(0);
- return EINVAL;
- }
- mtx->initialized = ETHR_MUTEX_INITIALIZED;
-#endif
- mtx->prev = NULL;
- mtx->next = NULL;
- mtx->is_rec_mtx = 0;
- return pthread_mutex_init(&mtx->pt_mtx, NULL);
-}
-
-#ifdef ETHR_HAVE_ETHR_REC_MUTEX_INIT
-
-int
-ethr_rec_mutex_init(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx) {
- ASSERT(0);
- return EINVAL;
- }
- mtx->initialized = ETHR_MUTEX_INITIALIZED;
-#endif
- if (rec_mtx_attr_need_init)
- init_rec_mtx_attr();
-
- mtx->prev = NULL;
- mtx->next = NULL;
- mtx->is_rec_mtx = 1;
- return pthread_mutex_init(&mtx->pt_mtx, &rec_mtx_attr);
-}
-
-#endif /* #if ETHR_HAVE_ETHR_REC_MUTEX_INIT */
-
-int
-ethr_mutex_destroy(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- if (mtx->next) {
- ASSERT(mtx->prev);
- ethr_mutex_unset_forksafe(mtx);
- }
-#if ETHR_XCHK
- mtx->initialized = 0;
-#endif
- return pthread_mutex_destroy(&mtx->pt_mtx);
-}
-
-int ethr_mutex_set_forksafe(ethr_mutex *mtx)
-{
- int res;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
-#if ETHR_HAVE_PTHREAD_ATFORK
- res = pthread_mutex_lock(&forksafe_mtx.pt_mtx);
- if (res != 0)
- return res;
- if (!forksafe_mtx.next) {
- ASSERT(!forksafe_mtx.prev);
- init_forksafe();
- }
- if (mtx->next) {
- /* forksafe already set for this mutex */
- ASSERT(mtx->prev);
- }
- else {
- mtx->next = forksafe_mtx.next;
- mtx->prev = &forksafe_mtx;
- forksafe_mtx.next->prev = mtx;
- forksafe_mtx.next = mtx;
- }
-
- res = pthread_mutex_unlock(&forksafe_mtx.pt_mtx);
-
-#else /* #if ETHR_HAVE_PTHREAD_ATFORK */
- res = ENOTSUP;
-#endif /* #if ETHR_HAVE_PTHREAD_ATFORK */
- return res;
-}
-
-int ethr_mutex_unset_forksafe(ethr_mutex *mtx)
-{
- int res;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
-#if ETHR_HAVE_PTHREAD_ATFORK
- res = pthread_mutex_lock(&forksafe_mtx.pt_mtx);
- if (res != 0)
- return res;
- if (!forksafe_mtx.next) {
- ASSERT(!forksafe_mtx.prev);
- init_forksafe();
- }
- if (!mtx->next) {
- /* forksafe already unset for this mutex */
- ASSERT(!mtx->prev);
- }
- else {
- mtx->prev->next = mtx->next;
- mtx->next->prev = mtx->prev;
- mtx->next = NULL;
- mtx->prev = NULL;
- }
- res = pthread_mutex_unlock(&forksafe_mtx.pt_mtx);
-
-#else /* #if ETHR_HAVE_PTHREAD_ATFORK */
- res = ENOTSUP;
-#endif /* #if ETHR_HAVE_PTHREAD_ATFORK */
- return res;
-}
-
-int
-ethr_mutex_trylock(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_mutex_trylock__(mtx);
-}
-
-int
-ethr_mutex_lock(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_mutex_lock__(mtx);
-}
-
-int
-ethr_mutex_unlock(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_mutex_unlock__(mtx);
-}
-
-/*
- * Condition variable functions
- */
-
-int
-ethr_cond_init(ethr_cond *cnd)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd) {
- ASSERT(0);
- return EINVAL;
- }
- cnd->initialized = ETHR_COND_INITIALIZED;
-#endif
- return pthread_cond_init(&cnd->pt_cnd, NULL);
-}
-
-int
-ethr_cond_destroy(ethr_cond *cnd)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd || cnd->initialized != ETHR_COND_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
- cnd->initialized = 0;
-#endif
- return pthread_cond_destroy(&cnd->pt_cnd);
-}
-
-int
-ethr_cond_signal(ethr_cond *cnd)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd || cnd->initialized != ETHR_COND_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return pthread_cond_signal(&cnd->pt_cnd);
-}
-
-int
-ethr_cond_broadcast(ethr_cond *cnd)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd || cnd->initialized != ETHR_COND_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return pthread_cond_broadcast(&cnd->pt_cnd);
-}
-
-int
-ethr_cond_wait(ethr_cond *cnd, ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd
- || cnd->initialized != ETHR_COND_INITIALIZED
- || !mtx
- || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return pthread_cond_wait(&cnd->pt_cnd, &mtx->pt_mtx);
-}
-
-int
-ethr_cond_timedwait(ethr_cond *cnd, ethr_mutex *mtx, ethr_timeval *timeout)
-{
- struct timespec to;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd
- || cnd->initialized != ETHR_COND_INITIALIZED
- || !mtx
- || mtx->initialized != ETHR_MUTEX_INITIALIZED
- || !timeout) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
-
- to.tv_sec = timeout->tv_sec;
- to.tv_nsec = timeout->tv_nsec;
-
- return pthread_cond_timedwait(&cnd->pt_cnd, &mtx->pt_mtx, &to);
-}
-
-
-#ifdef ETHR_HAVE_PTHREAD_RWLOCK_INIT
-
-int
-ethr_rwmutex_init(ethr_rwmutex *rwmtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!rwmtx) {
- ASSERT(0);
- return EINVAL;
- }
- rwmtx->initialized = ETHR_RWMUTEX_INITIALIZED;
-#endif
- return pthread_rwlock_init(&rwmtx->pt_rwlock, write_pref_attr);
-}
-
-int
-ethr_rwmutex_destroy(ethr_rwmutex *rwmtx)
-{
- int res;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = pthread_rwlock_destroy(&rwmtx->pt_rwlock);
-#if ETHR_XCHK
- rwmtx->initialized = 0;
-#endif
- return res;
-}
-
-int
-ethr_rwmutex_tryrlock(ethr_rwmutex *rwmtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_rwmutex_tryrlock__(rwmtx);
-}
-
-int
-ethr_rwmutex_rlock(ethr_rwmutex *rwmtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_rwmutex_rlock__(rwmtx);
-}
-
-int
-ethr_rwmutex_runlock(ethr_rwmutex *rwmtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_rwmutex_runlock__(rwmtx);
-}
-
-int
-ethr_rwmutex_tryrwlock(ethr_rwmutex *rwmtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_rwmutex_tryrwlock__(rwmtx);
-}
-
-int
-ethr_rwmutex_rwlock(ethr_rwmutex *rwmtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_rwmutex_rwlock__(rwmtx);
-}
-
-int
-ethr_rwmutex_rwunlock(ethr_rwmutex *rwmtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_rwmutex_rwunlock__(rwmtx);
-}
-
-#endif /* #ifdef ETHR_HAVE_PTHREAD_RWLOCK_INIT */
-
-/*
- * Current time
- */
-
-int
-ethr_time_now(ethr_timeval *time)
-{
- int res;
- struct timeval tv;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!time) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
-
- res = gettimeofday(&tv, NULL);
- time->tv_sec = (long) tv.tv_sec;
- time->tv_nsec = ((long) tv.tv_usec)*1000;
- return res;
-}
-
-/*
- * Thread specific data
- */
-
-int
-ethr_tsd_key_create(ethr_tsd_key *keyp)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!keyp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return pthread_key_create((pthread_key_t *) keyp, NULL);
-}
-
-int
-ethr_tsd_key_delete(ethr_tsd_key key)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
- return pthread_key_delete((pthread_key_t) key);
-}
-
-int
-ethr_tsd_set(ethr_tsd_key key, void *value)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
- return pthread_setspecific((pthread_key_t) key, value);
-}
-
-void *
-ethr_tsd_get(ethr_tsd_key key)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return NULL;
- }
-#endif
- return pthread_getspecific((pthread_key_t) key);
-}
-
-/*
- * Signal functions
- */
-
-#if ETHR_HAVE_ETHR_SIG_FUNCS
-
-int ethr_sigmask(int how, const sigset_t *set, sigset_t *oset)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!set && !oset) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return pthread_sigmask(how, set, oset);
-}
-
-int ethr_sigwait(const sigset_t *set, int *sig)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!set || !sig) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- if (sigwait(set, sig) < 0)
- return errno;
- return 0;
-}
-
-#endif /* #if ETHR_HAVE_ETHR_SIG_FUNCS */
-
-#elif defined(ETHR_WIN32_THREADS)
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
- * Native win32 threads implementation *
-\* */
-
-#define INVALID_TID -1
-
-/* The spin count values are more or less taken out of the blue */
-#define ETHR_MUTEX_SPIN_COUNT 5000
-#define ETHR_COND_SPIN_COUNT 1000
-
-ethr_tid serial_shift; /* Bits to shift serial when constructing a tid */
-ethr_tid last_serial; /* Last thread table serial used */
-ethr_tid last_ix; /* Last thread table index used */
-ethr_tid thr_ix_mask; /* Mask used to mask out thread table index from a tid */
-
-/* Event used for conditional variables. On per thread. */
-/*typedef struct cnd_wait_event__ cnd_wait_event_;*/
-struct cnd_wait_event__ {
- HANDLE handle;
- cnd_wait_event_ *prev;
- cnd_wait_event_ *next;
- int in_queue;
-};
-
-/* Thread specific data. Stored in the thread table */
-typedef struct {
- ethr_tid thr_id;
- HANDLE thr_handle;
- ethr_tid joiner;
- void *result;
- cnd_wait_event_ wait_event;
-} thr_data_;
-
-/* Argument passed to thr_wrapper() */
-typedef struct {
- void * (*func)(void *);
- void * arg;
- thr_data_ *ptd;
- thr_data_ *td;
- int res;
- void *prep_func_res;
-} thr_wrap_data_;
-
-
-static CRITICAL_SECTION thr_table_cs; /* Critical section used to protect
- the thread table from concurrent
- accesses. */
-static CRITICAL_SECTION fake_static_init_cs; /* Critical section used to protect
- initialazition of 'statically
- initialized' mutexes */
-static thr_data_ * thr_table[ETHR_MAX_THREADS]; /* The thread table */
-
-static DWORD tls_own_thr_data;
-
-static thr_data_ main_thr_data;
-
-#define THR_IX(TID) ((TID) & thr_ix_mask)
-#define OWN_THR_DATA ((thr_data_ *) TlsGetValue(tls_own_thr_data))
-
-/*
- * ----------------------------------------------------------------------------
- * Static functions
- * ----------------------------------------------------------------------------
- */
-
-static int
-get_errno(void)
-{
- switch (GetLastError()) {
- case ERROR_INVALID_FUNCTION: return EINVAL; /* 1 */
- case ERROR_FILE_NOT_FOUND: return ENOENT; /* 2 */
- case ERROR_PATH_NOT_FOUND: return ENOENT; /* 3 */
- case ERROR_TOO_MANY_OPEN_FILES: return EMFILE; /* 4 */
- case ERROR_ACCESS_DENIED: return EACCES; /* 5 */
- case ERROR_INVALID_HANDLE: return EBADF; /* 6 */
- case ERROR_ARENA_TRASHED: return ENOMEM; /* 7 */
- case ERROR_NOT_ENOUGH_MEMORY: return ENOMEM; /* 8 */
- case ERROR_INVALID_BLOCK: return ENOMEM; /* 9 */
- case ERROR_BAD_ENVIRONMENT: return E2BIG; /* 10 */
- case ERROR_BAD_FORMAT: return ENOEXEC; /* 11 */
- case ERROR_INVALID_ACCESS: return EINVAL; /* 12 */
- case ERROR_INVALID_DATA: return EINVAL; /* 13 */
- case ERROR_OUTOFMEMORY: return ENOMEM; /* 14 */
- case ERROR_INVALID_DRIVE: return ENOENT; /* 15 */
- case ERROR_CURRENT_DIRECTORY: return EACCES; /* 16 */
- case ERROR_NOT_SAME_DEVICE: return EXDEV; /* 17 */
- case ERROR_NO_MORE_FILES: return ENOENT; /* 18 */
- case ERROR_WRITE_PROTECT: return EACCES; /* 19 */
- case ERROR_BAD_UNIT: return EACCES; /* 20 */
- case ERROR_NOT_READY: return EACCES; /* 21 */
- case ERROR_BAD_COMMAND: return EACCES; /* 22 */
- case ERROR_CRC: return EACCES; /* 23 */
- case ERROR_BAD_LENGTH: return EACCES; /* 24 */
- case ERROR_SEEK: return EACCES; /* 25 */
- case ERROR_NOT_DOS_DISK: return EACCES; /* 26 */
- case ERROR_SECTOR_NOT_FOUND: return EACCES; /* 27 */
- case ERROR_OUT_OF_PAPER: return EACCES; /* 28 */
- case ERROR_WRITE_FAULT: return EACCES; /* 29 */
- case ERROR_READ_FAULT: return EACCES; /* 30 */
- case ERROR_GEN_FAILURE: return EACCES; /* 31 */
- case ERROR_SHARING_VIOLATION: return EACCES; /* 32 */
- case ERROR_LOCK_VIOLATION: return EACCES; /* 33 */
- case ERROR_WRONG_DISK: return EACCES; /* 34 */
- case ERROR_SHARING_BUFFER_EXCEEDED: return EACCES; /* 36 */
- case ERROR_BAD_NETPATH: return ENOENT; /* 53 */
- case ERROR_NETWORK_ACCESS_DENIED: return EACCES; /* 65 */
- case ERROR_BAD_NET_NAME: return ENOENT; /* 67 */
- case ERROR_FILE_EXISTS: return EEXIST; /* 80 */
- case ERROR_CANNOT_MAKE: return EACCES; /* 82 */
- case ERROR_FAIL_I24: return EACCES; /* 83 */
- case ERROR_INVALID_PARAMETER: return EINVAL; /* 87 */
- case ERROR_NO_PROC_SLOTS: return EAGAIN; /* 89 */
- case ERROR_DRIVE_LOCKED: return EACCES; /* 108 */
- case ERROR_BROKEN_PIPE: return EPIPE; /* 109 */
- case ERROR_DISK_FULL: return ENOSPC; /* 112 */
- case ERROR_INVALID_TARGET_HANDLE: return EBADF; /* 114 */
- case ERROR_WAIT_NO_CHILDREN: return ECHILD; /* 128 */
- case ERROR_CHILD_NOT_COMPLETE: return ECHILD; /* 129 */
- case ERROR_DIRECT_ACCESS_HANDLE: return EBADF; /* 130 */
- case ERROR_NEGATIVE_SEEK: return EINVAL; /* 131 */
- case ERROR_SEEK_ON_DEVICE: return EACCES; /* 132 */
- case ERROR_DIR_NOT_EMPTY: return ENOTEMPTY;/* 145 */
- case ERROR_NOT_LOCKED: return EACCES; /* 158 */
- case ERROR_BAD_PATHNAME: return ENOENT; /* 161 */
- case ERROR_MAX_THRDS_REACHED: return EAGAIN; /* 164 */
- case ERROR_LOCK_FAILED: return EACCES; /* 167 */
- case ERROR_ALREADY_EXISTS: return EEXIST; /* 183 */
- case ERROR_INVALID_STARTING_CODESEG: return ENOEXEC; /* 188 */
- case ERROR_INVALID_STACKSEG: return ENOEXEC; /* 189 */
- case ERROR_INVALID_MODULETYPE: return ENOEXEC; /* 190 */
- case ERROR_INVALID_EXE_SIGNATURE: return ENOEXEC; /* 191 */
- case ERROR_EXE_MARKED_INVALID: return ENOEXEC; /* 192 */
- case ERROR_BAD_EXE_FORMAT: return ENOEXEC; /* 193 */
- case ERROR_ITERATED_DATA_EXCEEDS_64k: return ENOEXEC; /* 194 */
- case ERROR_INVALID_MINALLOCSIZE: return ENOEXEC; /* 195 */
- case ERROR_DYNLINK_FROM_INVALID_RING: return ENOEXEC; /* 196 */
- case ERROR_IOPL_NOT_ENABLED: return ENOEXEC; /* 197 */
- case ERROR_INVALID_SEGDPL: return ENOEXEC; /* 198 */
- case ERROR_AUTODATASEG_EXCEEDS_64k: return ENOEXEC; /* 199 */
- case ERROR_RING2SEG_MUST_BE_MOVABLE: return ENOEXEC; /* 200 */
- case ERROR_RELOC_CHAIN_XEEDS_SEGLIM: return ENOEXEC; /* 201 */
- case ERROR_INFLOOP_IN_RELOC_CHAIN: return ENOEXEC; /* 202 */
- case ERROR_FILENAME_EXCED_RANGE: return ENOENT; /* 206 */
- case ERROR_NESTING_NOT_ALLOWED: return EAGAIN; /* 215 */
- case ERROR_NOT_ENOUGH_QUOTA: return ENOMEM; /* 1816 */
- default: return EINVAL;
- }
-}
-
-static ETHR_INLINE thr_data_ *
-tid2thr(ethr_tid tid)
-{
- ethr_tid ix;
- thr_data_ *td;
-
- if (tid < 0)
- return NULL;
- ix = THR_IX(tid);
- if (ix >= ETHR_MAX_THREADS)
- return NULL;
- td = thr_table[ix];
- if (!td)
- return NULL;
- if (td->thr_id != tid)
- return NULL;
- return td;
-}
-
-static ETHR_INLINE void
-new_tid(ethr_tid *new_tid, ethr_tid *new_serial, ethr_tid *new_ix)
-{
- ethr_tid tmp_serial = last_serial;
- ethr_tid tmp_ix = last_ix + 1;
- ethr_tid start_ix = tmp_ix;
-
-
- do {
- if (tmp_ix >= ETHR_MAX_THREADS) {
- tmp_serial++;
- if ((tmp_serial << serial_shift) < 0)
- tmp_serial = 0;
- tmp_ix = 0;
- }
- if (!thr_table[tmp_ix]) {
- *new_tid = (tmp_serial << serial_shift) | tmp_ix;
- *new_serial = tmp_serial;
- *new_ix = tmp_ix;
- return;
- }
- tmp_ix++;
- } while (tmp_ix != start_ix);
-
- *new_tid = INVALID_TID;
- *new_serial = INVALID_TID;
- *new_ix = INVALID_TID;
-
-}
-
-
-static void thr_exit_cleanup(thr_data_ *td, void *res)
-{
-
- ASSERT(td == OWN_THR_DATA);
-
- run_exit_handlers();
-
- EnterCriticalSection(&thr_table_cs);
- CloseHandle(td->wait_event.handle);
- if (td->thr_handle == INVALID_HANDLE_VALUE) {
- /* We are detached; cleanup thread table */
- ASSERT(td->joiner == INVALID_TID);
- ASSERT(td == thr_table[THR_IX(td->thr_id)]);
- thr_table[THR_IX(td->thr_id)] = NULL;
- if (td != &main_thr_data)
- (*freep)((void *) td);
- }
- else {
- /* Save result and let joining thread cleanup */
- td->result = res;
- }
- LeaveCriticalSection(&thr_table_cs);
-}
-
-static unsigned __stdcall thr_wrapper(LPVOID args)
-{
- void *(*func)(void*) = ((thr_wrap_data_ *) args)->func;
- void *arg = ((thr_wrap_data_ *) args)->arg;
- thr_data_ *td = ((thr_wrap_data_ *) args)->td;
-
- td->wait_event.handle = CreateEvent(NULL, FALSE, FALSE, NULL);
- if (td->wait_event.handle == INVALID_HANDLE_VALUE
- || !TlsSetValue(tls_own_thr_data, (LPVOID) td)) {
- ((thr_wrap_data_ *) args)->res = get_errno();
- if (td->wait_event.handle != INVALID_HANDLE_VALUE)
- CloseHandle(td->wait_event.handle);
- SetEvent(((thr_wrap_data_ *) args)->ptd->wait_event.handle);
- _endthreadex((unsigned) 0);
- ASSERT(0);
- }
-
- td->wait_event.prev = NULL;
- td->wait_event.next = NULL;
- td->wait_event.in_queue = 0;
-
- if (thread_create_child_func)
- (*thread_create_child_func)(((thr_wrap_data_ *) args)->prep_func_res);
-
- ASSERT(td == OWN_THR_DATA);
-
- ((thr_wrap_data_ *) args)->res = 0;
- SetEvent(((thr_wrap_data_ *) args)->ptd->wait_event.handle);
-
- thr_exit_cleanup(td, (*func)(arg));
- return 0;
-}
-
-int
-ethr_fake_static_mutex_init(ethr_mutex *mtx)
-{
- EnterCriticalSection((CRITICAL_SECTION *) &fake_static_init_cs);
- /* Got here under race conditions; check again... */
- if (!mtx->initialized) {
- if (!InitializeCriticalSectionAndSpinCount(&mtx->cs,
- ETHR_MUTEX_SPIN_COUNT))
- return get_errno();
- mtx->initialized = ETHR_MUTEX_INITIALIZED;
- }
- LeaveCriticalSection((CRITICAL_SECTION *) &fake_static_init_cs);
- return 0;
-}
-
-static int
-fake_static_cond_init(ethr_cond *cnd)
-{
- EnterCriticalSection((CRITICAL_SECTION *) &fake_static_init_cs);
- /* Got here under race conditions; check again... */
- if (!cnd->initialized) {
- if (!InitializeCriticalSectionAndSpinCount(&cnd->cs,
- ETHR_COND_SPIN_COUNT))
- return get_errno();
- cnd->queue = NULL;
- cnd->queue_end = NULL;
- cnd->initialized = ETHR_COND_INITIALIZED;
- }
- LeaveCriticalSection((CRITICAL_SECTION *) &fake_static_init_cs);
- return 0;
-}
-
-#ifdef __GNUC__
-#define LL_LITERAL(X) X##LL
-#else
-#define LL_LITERAL(X) X##i64
-#endif
-
-#define EPOCH_JULIAN_DIFF LL_LITERAL(11644473600)
-
-static ETHR_INLINE void
-get_curr_time(long *sec, long *nsec)
-{
- SYSTEMTIME t;
- FILETIME ft;
- LONGLONG lft;
-
- GetSystemTime(&t);
- SystemTimeToFileTime(&t, &ft);
- memcpy(&lft, &ft, sizeof(lft));
- *nsec = ((long) (lft % LL_LITERAL(10000000)))*100;
- *sec = (long) ((lft / LL_LITERAL(10000000)) - EPOCH_JULIAN_DIFF);
-}
-
-static cnd_wait_event_ *cwe_freelist;
-static CRITICAL_SECTION cwe_cs;
-
-static int
-alloc_cwe(cnd_wait_event_ **cwe_res)
-{
- cnd_wait_event_ *cwe;
- EnterCriticalSection(&cwe_cs);
- cwe = cwe_freelist;
- if (cwe) {
- cwe_freelist = cwe->next;
- LeaveCriticalSection(&cwe_cs);
- }
- else {
- LeaveCriticalSection(&cwe_cs);
- cwe = (*allocp)(sizeof(cnd_wait_event_));
- if (!cwe)
- return ENOMEM;
- cwe->handle = CreateEvent(NULL, FALSE, FALSE, NULL);
- if (cwe->handle == INVALID_HANDLE_VALUE) {
- int res = get_errno();
- (*freep)(cwe);
- return res;
- }
- }
- *cwe_res = cwe;
- return 0;
-}
-
-static
-free_cwe(cnd_wait_event_ *cwe)
-{
- EnterCriticalSection(&cwe_cs);
- cwe->next = cwe_freelist;
- cwe_freelist = cwe;
- LeaveCriticalSection(&cwe_cs);
-}
-
-static ETHR_INLINE int
-condwait(ethr_cond *cnd,
- ethr_mutex *mtx,
- int with_timeout,
- ethr_timeval *timeout)
-{
- int res;
- thr_data_ *td;
- cnd_wait_event_ *cwe;
- DWORD code;
- long time; /* time until timeout in milli seconds */
-
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-
- if (!mtx
- || mtx->initialized != ETHR_MUTEX_INITIALIZED
- || !cnd
- || (cnd->initialized && cnd->initialized != ETHR_COND_INITIALIZED)
- || (with_timeout && !timeout)) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
-
- td = OWN_THR_DATA;
- if (td)
- cwe = &td->wait_event;
- else { /* A non-ethread thread */
- res = alloc_cwe(&cwe);
- if (res != 0)
- return res;
- }
-
- if (!cnd->initialized)
- fake_static_cond_init(cnd);
- EnterCriticalSection(&cnd->cs);
-
- ASSERT(!cwe->in_queue);
- if (cnd->queue_end) {
- ASSERT(cnd->queue);
- cwe->prev = cnd->queue_end;
- cwe->next = NULL;
- cnd->queue_end->next = cwe;
- cnd->queue_end = cwe;
- }
- else {
- ASSERT(!cnd->queue);
- cwe->prev = NULL;
- cwe->next = NULL;
- cnd->queue = cwe;
- cnd->queue_end = cwe;
- }
- cwe->in_queue = 1;
-
- LeaveCriticalSection(&cnd->cs);
-
- LeaveCriticalSection(&mtx->cs);
-
- if (!with_timeout)
- time = INFINITE;
- else {
- long sec, nsec;
- ASSERT(timeout);
- get_curr_time(&sec, &nsec);
- time = (timeout->tv_sec - sec)*1000;
- time += (timeout->tv_nsec - nsec + 500)/1000000;
- if (time < 0)
- time = 0;
- }
-
- /* wait for event to signal */
- code = WaitForSingleObject(cwe->handle, time);
-
- EnterCriticalSection(&mtx->cs);
-
- if (code == WAIT_OBJECT_0) {
- /* We were woken by a signal or a broadcast ... */
- res = 0;
-
- /* ... no need to remove event from wait queue since this was
- taken care of by the signal or broadcast */
-#ifdef DEBUG
- EnterCriticalSection(&cnd->cs);
- ASSERT(!cwe->in_queue);
- LeaveCriticalSection(&cnd->cs);
-#endif
-
- }
- else {
- /* We timed out... */
- res = ETIMEDOUT;
-
- /* ... probably have to remove event from wait queue ... */
- EnterCriticalSection(&cnd->cs);
-
- if (cwe->in_queue) { /* ... but we must check that we are in queue
- since a signal or broadcast after timeout
- may have removed us from the queue */
- if (cwe->prev) {
- cwe->prev->next = cwe->next;
- }
- else {
- ASSERT(cnd->queue == cwe);
- cnd->queue = cwe->next;
- }
-
- if (cwe->next) {
- cwe->next->prev = cwe->prev;
- }
- else {
- ASSERT(cnd->queue_end == cwe);
- cnd->queue_end = cwe->prev;
- }
- cwe->in_queue = 0;
- }
-
- LeaveCriticalSection(&cnd->cs);
-
- }
-
- if (!td)
- free_cwe(cwe);
-
- return res;
-
-}
-
-
-/*
- * ----------------------------------------------------------------------------
- * Exported functions
- * ----------------------------------------------------------------------------
- */
-
-int
-ethr_init(ethr_init_data *id)
-{
-#ifdef _WIN32_WINNT
- DWORD major = (_WIN32_WINNT >> 8) & 0xff;
- DWORD minor = _WIN32_WINNT & 0xff;
- OSVERSIONINFO os_version;
-#endif
- int err = 0;
- thr_data_ *td = &main_thr_data;
- unsigned long i;
-
- if (!ethr_not_inited)
- return EINVAL;
-
-#ifdef _WIN32_WINNT
- os_version.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
- GetVersionEx(&os_version);
- if (os_version.dwPlatformId != VER_PLATFORM_WIN32_NT
- || os_version.dwMajorVersion < major
- || (os_version.dwMajorVersion == major
- && os_version.dwMinorVersion < minor))
- return ENOTSUP;
-#endif
-
- ASSERT(ETHR_MAX_THREADS > 0);
- for (i = ETHR_MAX_THREADS - 1, serial_shift = 0;
- i;
- serial_shift++, i >>= 1);
- thr_ix_mask = ~(~((ethr_tid) 0) << serial_shift);
-
- tls_own_thr_data = TlsAlloc();
- if (tls_own_thr_data == TLS_OUT_OF_INDEXES)
- goto error;
-
- last_serial = 0;
- last_ix = 0;
-
- td->thr_id = 0;
- td->thr_handle = GetCurrentThread();
- td->joiner = INVALID_TID;
- td->result = NULL;
- td->wait_event.handle = CreateEvent(NULL, FALSE, FALSE, NULL);
- if (td->wait_event.handle == INVALID_HANDLE_VALUE)
- goto error;
- td->wait_event.prev = NULL;
- td->wait_event.next = NULL;
- td->wait_event.in_queue = 0;
- thr_table[0] = td;
-
- if (!TlsSetValue(tls_own_thr_data, (LPVOID) td))
- goto error;
-
- ASSERT(td == OWN_THR_DATA);
-
-
- cwe_freelist = NULL;
- if (!InitializeCriticalSectionAndSpinCount(&cwe_cs,
- ETHR_MUTEX_SPIN_COUNT))
- goto error;
-
- for (i = 1; i < ETHR_MAX_THREADS; i++)
- thr_table[i] = NULL;
-
- if (!InitializeCriticalSectionAndSpinCount(&thr_table_cs,
- ETHR_MUTEX_SPIN_COUNT))
- goto error;
- if (!InitializeCriticalSectionAndSpinCount(&fake_static_init_cs,
- ETHR_MUTEX_SPIN_COUNT))
- goto error;
- ethr_not_inited = 0;
-
- err = init_common(id);
- if (err)
- goto error;
-
- return 0;
-
- error:
- ethr_not_inited = 1;
- if (err == 0)
- err = get_errno();
- ASSERT(err != 0);
- if (td->thr_handle != INVALID_HANDLE_VALUE)
- CloseHandle(td->thr_handle);
- if (td->wait_event.handle != INVALID_HANDLE_VALUE)
- CloseHandle(td->wait_event.handle);
- return err;
-}
-
-/*
- * Thread functions.
- */
-
-int
-ethr_thr_create(ethr_tid *tid, void * (*func)(void *), void *arg,
- ethr_thr_opts *opts)
-{
- int err = 0;
- thr_wrap_data_ twd;
- thr_data_ *my_td, *child_td = NULL;
- ethr_tid child_tid, child_serial, child_ix;
- DWORD code;
- unsigned ID;
- unsigned stack_size = 0; /* 0 = system default */
- int use_stack_size = (opts && opts->suggested_stack_size >= 0
- ? opts->suggested_stack_size
- : -1 /* Use system default */);
-
-#ifdef ETHR_MODIFIED_DEFAULT_STACK_SIZE
- if (use_stack_size < 0)
- use_stack_size = ETHR_MODIFIED_DEFAULT_STACK_SIZE;
-#endif
-
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!tid || !func) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
-
- my_td = OWN_THR_DATA;
- if (!my_td) {
- /* Only ethreads are allowed to call this function */
- ASSERT(0);
- return EACCES;
- }
-
- if (use_stack_size >= 0) {
- size_t suggested_stack_size = (size_t) use_stack_size;
-#ifdef DEBUG
- suggested_stack_size /= 2; /* Make sure we got margin */
-#endif
- if (suggested_stack_size < min_stack_size)
- stack_size = (unsigned) ETHR_KW2B(min_stack_size);
- else if (suggested_stack_size > max_stack_size)
- stack_size = (unsigned) ETHR_KW2B(max_stack_size);
- else
- stack_size =
- (unsigned) ETHR_PAGE_ALIGN(ETHR_KW2B(suggested_stack_size));
- }
-
- EnterCriticalSection(&thr_table_cs);
-
- /* Call prepare func if it exist */
- if (thread_create_prepare_func)
- twd.prep_func_res = (*thread_create_prepare_func)();
- else
- twd.prep_func_res = NULL;
-
- /* Find a new thread id to use */
- new_tid(&child_tid, &child_serial, &child_ix);
- if (child_tid == INVALID_TID) {
- err = EAGAIN;
- goto error;
- }
-
- ASSERT(child_ix == THR_IX(child_tid));
-
- *tid = child_tid;
-
- ASSERT(!thr_table[child_ix]);
-
- /* Alloc thread data */
- thr_table[child_ix] = child_td = (thr_data_ *) (*allocp)(sizeof(thr_data_));
- if (!child_td) {
- err = ENOMEM;
- goto error;
- }
-
- /* Init thread data */
-
- child_td->thr_id = child_tid;
- child_td->thr_handle = INVALID_HANDLE_VALUE;
- child_td->joiner = INVALID_TID;
- child_td->result = NULL;
- /* 'child_td->wait_event' is initialized by child thread */
-
-
- /* Init thread wrapper data */
-
- twd.func = func;
- twd.arg = arg;
- twd.ptd = my_td;
- twd.td = child_td;
- twd.res = 0;
-
- ASSERT(!my_td->wait_event.in_queue);
-
- /* spawn the thr_wrapper function */
- child_td->thr_handle = (HANDLE) _beginthreadex(NULL,
- stack_size,
- thr_wrapper,
- (LPVOID) &twd,
- 0,
- &ID);
- if (child_td->thr_handle == (HANDLE) 0) {
- child_td->thr_handle = INVALID_HANDLE_VALUE;
- goto error;
- }
-
- ASSERT(child_td->thr_handle != INVALID_HANDLE_VALUE);
-
- /* Wait for child to finish initialization */
- code = WaitForSingleObject(my_td->wait_event.handle, INFINITE);
- if (twd.res || code != WAIT_OBJECT_0) {
- err = twd.res;
- goto error;
- }
-
- if (opts && opts->detached) {
- CloseHandle(child_td->thr_handle);
- child_td->thr_handle = INVALID_HANDLE_VALUE;
- }
-
- last_serial = child_serial;
- last_ix = child_ix;
-
- ASSERT(thr_table[child_ix] == child_td);
-
- if (thread_create_parent_func)
- (*thread_create_parent_func)(twd.prep_func_res);
-
- LeaveCriticalSection(&thr_table_cs);
-
- return 0;
-
- error:
-
- if (err == 0)
- err = get_errno();
- ASSERT(err != 0);
-
- if (thread_create_parent_func)
- (*thread_create_parent_func)(twd.prep_func_res);
-
- if (child_ix != INVALID_TID) {
-
- if (child_td) {
- ASSERT(thr_table[child_ix] == child_td);
-
- if (child_td->thr_handle != INVALID_HANDLE_VALUE) {
- WaitForSingleObject(child_td->thr_handle, INFINITE);
- CloseHandle(child_td->thr_handle);
- }
-
- (*freep)((void *) child_td);
- thr_table[child_ix] = NULL;
- }
- }
-
- *tid = INVALID_TID;
-
- LeaveCriticalSection(&thr_table_cs);
- return err;
-}
-
-int ethr_thr_join(ethr_tid tid, void **res)
-{
- int err = 0;
- DWORD code;
- thr_data_ *td;
- thr_data_ *my_td;
-
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
-
- my_td = OWN_THR_DATA;
-
- if (!my_td) {
- /* Only ethreads are allowed to call this function */
- ASSERT(0);
- return EACCES;
- }
-
- EnterCriticalSection(&thr_table_cs);
-
- td = tid2thr(tid);
- if (!td)
- err = ESRCH;
- else if (td->thr_handle == INVALID_HANDLE_VALUE /* i.e. detached */
- || td->joiner != INVALID_TID) /* i.e. someone else is joining */
- err = EINVAL;
- else if (my_td == td)
- err = EDEADLK;
- else
- td->joiner = my_td->thr_id;
-
- LeaveCriticalSection(&thr_table_cs);
-
- if (err)
- goto error;
-
- /* Wait for thread to terminate */
- code = WaitForSingleObject(td->thr_handle, INFINITE);
- if (code != WAIT_OBJECT_0)
- goto error;
-
- EnterCriticalSection(&thr_table_cs);
-
- ASSERT(td == tid2thr(tid));
- ASSERT(td->thr_handle != INVALID_HANDLE_VALUE);
- ASSERT(td->joiner == my_td->thr_id);
-
- if (res)
- *res = td->result;
-
- CloseHandle(td->thr_handle);
- ASSERT(td == thr_table[THR_IX(td->thr_id)]);
- thr_table[THR_IX(td->thr_id)] = NULL;
- if (td != &main_thr_data)
- (*freep)((void *) td);
-
- LeaveCriticalSection(&thr_table_cs);
-
- return 0;
-
- error:
- if (err == 0)
- err = get_errno();
- ASSERT(err != 0);
- return err;
-}
-
-
-int
-ethr_thr_detach(ethr_tid tid)
-{
- int res;
- DWORD code;
- thr_data_ *td;
-
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
-
- if (!OWN_THR_DATA) {
- /* Only ethreads are allowed to call this function */
- ASSERT(0);
- return EACCES;
- }
-
- EnterCriticalSection(&thr_table_cs);
-
- td = tid2thr(tid);
- if (!td)
- res = ESRCH;
- if (td->thr_handle == INVALID_HANDLE_VALUE /* i.e. detached */
- || td->joiner != INVALID_TID) /* i.e. someone is joining */
- res = EINVAL;
- else {
- res = 0;
- CloseHandle(td->thr_handle);
- td->thr_handle = INVALID_HANDLE_VALUE;
- }
-
- LeaveCriticalSection(&thr_table_cs);
-
- return res;
-}
-
-
-void
-ethr_thr_exit(void *res)
-{
- thr_data_ *td;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return;
- }
-#endif
- td = OWN_THR_DATA;
- if (!td) {
- /* Only ethreads are allowed to call this function */
- ASSERT(0);
- return;
- }
- thr_exit_cleanup(td, res);
- _endthreadex((unsigned) 0);
-}
-
-ethr_tid
-ethr_self(void)
-{
- thr_data_ *td;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return INVALID_TID;
- }
-#endif
- /* It is okay for non-ethreads (i.e. native win32 threads) to call
- ethr_self(). They will however be returned the INVALID_TID. */
- td = OWN_THR_DATA;
- if (!td)
- return INVALID_TID;
- return td->thr_id;
-}
-
-int
-ethr_equal_tids(ethr_tid tid1, ethr_tid tid2)
-{
- /* INVALID_TID does not equal any tid, not even the INVALID_TID */
- return tid1 == tid2 && tid1 != INVALID_TID;
-}
-
-/*
- * Mutex functions.
- */
-
-int
-ethr_mutex_init(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- if (!InitializeCriticalSectionAndSpinCount(&mtx->cs, ETHR_MUTEX_SPIN_COUNT))
- return get_errno();
- mtx->initialized = ETHR_MUTEX_INITIALIZED;
-#if ETHR_XCHK
- mtx->is_rec_mtx = 0;
-#endif
- return 0;
-}
-
-int
-ethr_rec_mutex_init(ethr_mutex *mtx)
-{
- int res;
- res = ethr_mutex_init(mtx);
-#if ETHR_XCHK
- mtx->is_rec_mtx = 1;
-#endif
- return res;
-}
-
-int
-ethr_mutex_destroy(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- DeleteCriticalSection(&mtx->cs);
- mtx->initialized = 0;
- return 0;
-}
-
-int ethr_mutex_set_forksafe(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
- return 0; /* No fork() */
-}
-
-int ethr_mutex_unset_forksafe(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
- return 0; /* No fork() */
-}
-
-int
-ethr_mutex_trylock(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx
- || (mtx->initialized && mtx->initialized != ETHR_MUTEX_INITIALIZED)) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- if (!mtx->initialized) {
- int res = ethr_fake_static_mutex_init(mtx);
- if (res != 0)
- return res;
- }
- return ethr_mutex_trylock__(mtx);
-}
-
-int
-ethr_mutex_lock(ethr_mutex *mtx)
-{
- int res;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx
- || (mtx->initialized && mtx->initialized != ETHR_MUTEX_INITIALIZED)) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_mutex_lock__(mtx);
-}
-
-int
-ethr_mutex_unlock(ethr_mutex *mtx)
-{
-#if ETHR_XCHK
- int res;
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!mtx || mtx->initialized != ETHR_MUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_mutex_unlock__(mtx);
-}
-
-/*
- * Condition variable functions.
- */
-
-int
-ethr_cond_init(ethr_cond *cnd)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- if (!InitializeCriticalSectionAndSpinCount(&cnd->cs, ETHR_COND_SPIN_COUNT))
- return get_errno();
- cnd->queue = NULL;
- cnd->queue_end = NULL;
- cnd->initialized = ETHR_COND_INITIALIZED;
- return 0;
-}
-
-int
-ethr_cond_destroy(ethr_cond *cnd)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd
- || (cnd->initialized && cnd->initialized != ETHR_COND_INITIALIZED)
- || cnd->queue) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- DeleteCriticalSection(&cnd->cs);
- cnd->initialized = 0;
- return 0;
-}
-
-int
-ethr_cond_signal(ethr_cond *cnd)
-{
- cnd_wait_event_ *cwe;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd
- || (cnd->initialized && cnd->initialized != ETHR_COND_INITIALIZED)) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- if (!cnd->initialized) {
- int res = fake_static_cond_init(cnd);
- if (res != 0)
- return res;
- }
- EnterCriticalSection(&cnd->cs);
- cwe = cnd->queue;
- if (cwe) {
- ASSERT(cwe->in_queue);
- SetEvent(cnd->queue->handle);
- if (cwe->next)
- cwe->next->prev = NULL;
- else {
- ASSERT(cnd->queue_end == cnd->queue);
- cnd->queue_end = NULL;
- }
- cnd->queue = cwe->next;
- cwe->in_queue = 0;
- }
- LeaveCriticalSection(&cnd->cs);
- return 0;
-}
-
-int
-ethr_cond_broadcast(ethr_cond *cnd)
-{
- cnd_wait_event_ *cwe;
-
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!cnd
- || (cnd->initialized && cnd->initialized != ETHR_COND_INITIALIZED)) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- if (!cnd->initialized) {
- int res = fake_static_cond_init(cnd);
- if (res != 0)
- return res;
- }
- EnterCriticalSection(&cnd->cs);
- for (cwe = cnd->queue; cwe; cwe = cwe->next) {
- ASSERT(cwe->in_queue);
- SetEvent(cwe->handle);
- cwe->in_queue = 0;
- }
- cnd->queue = NULL;
- cnd->queue_end = NULL;
- LeaveCriticalSection(&cnd->cs);
- return 0;
-
-}
-
-int
-ethr_cond_wait(ethr_cond *cnd, ethr_mutex *mtx)
-{
- return condwait(cnd, mtx, 0, NULL);
-}
-
-int
-ethr_cond_timedwait(ethr_cond *cnd, ethr_mutex *mtx, ethr_timeval *timeout)
-{
- return condwait(cnd, mtx, 1, timeout);
-}
-
-int
-ethr_time_now(ethr_timeval *time)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!time) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- get_curr_time(&time->tv_sec, &time->tv_nsec);
- return 0;
-}
-
-/*
- * Thread specific data
- */
-
-int
-ethr_tsd_key_create(ethr_tsd_key *keyp)
-{
- DWORD key;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!keyp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- key = TlsAlloc();
- if (key == TLS_OUT_OF_INDEXES)
- return get_errno();
- *keyp = (ethr_tsd_key) key;
- return 0;
-}
-
-int
-ethr_tsd_key_delete(ethr_tsd_key key)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
- if (!TlsFree((DWORD) key))
- return get_errno();
- return 0;
-}
-
-int
-ethr_tsd_set(ethr_tsd_key key, void *value)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
-#endif
- if (!TlsSetValue((DWORD) key, (LPVOID) value))
- return get_errno();
- return 0;
-}
-
-void *
-ethr_tsd_get(ethr_tsd_key key)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return NULL;
- }
-#endif
- return (void *) TlsGetValue((DWORD) key);
-}
-
-/* Misc */
-
-#ifndef ETHR_HAVE_OPTIMIZED_LOCKS
-
-int
-ethr_do_spinlock_init(ethr_spinlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- if (InitializeCriticalSectionAndSpinCount(&lock->cs, INT_MAX))
- return 0;
- else
- return get_errno();
-}
-
-int
-ethr_do_rwlock_init(ethr_rwlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- lock->counter = 0;
- if (InitializeCriticalSectionAndSpinCount(&lock->cs, INT_MAX))
- return 0;
- else
- return get_errno();
-}
-
-#endif /* #ifndef ETHR_HAVE_OPTIMIZED_ATOMIC_OPS */
-
-#else
-#error "Missing thread implementation"
-#endif
-
-/* Atomics */
-
-int
-ethr_atomic_init(ethr_atomic_t *var, long i)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!var) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_init__(var, i);
-}
-
-int
-ethr_atomic_set(ethr_atomic_t *var, long i)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!var) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_set__(var, i);
-}
-
-int
-ethr_atomic_read(ethr_atomic_t *var, long *i)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!var || !i) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_read__(var, i);
-}
-
-
-int
-ethr_atomic_addtest(ethr_atomic_t *var, long incr, long *testp)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!var || !testp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_addtest__(var, incr, testp);
-}
-
-int
-ethr_atomic_inctest(ethr_atomic_t *incp, long *testp)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!incp || !testp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_inctest__(incp, testp);
-}
-
-int
-ethr_atomic_dectest(ethr_atomic_t *decp, long *testp)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!decp || !testp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_dectest__(decp, testp);
-}
-
-int
-ethr_atomic_add(ethr_atomic_t *var, long incr)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!var) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_add__(var, incr);
-}
-
-int
-ethr_atomic_inc(ethr_atomic_t *incp)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!incp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_inc__(incp);
-}
-
-int
-ethr_atomic_dec(ethr_atomic_t *decp)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!decp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_dec__(decp);
-}
-
-int
-ethr_atomic_and_old(ethr_atomic_t *var, long mask, long *old)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!var || !old) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_and_old__(var, mask, old);
-}
-
-int
-ethr_atomic_or_old(ethr_atomic_t *var, long mask, long *old)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!var || !old) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_or_old__(var, mask, old);
-}
-
-int
-ethr_atomic_xchg(ethr_atomic_t *var, long new, long *old)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!var || !old) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_xchg__(var, new, old);
-}
-
-int
-ethr_atomic_cmpxchg(ethr_atomic_t *var, long new, long expected, long *old)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!var || !old) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_atomic_cmpxchg__(var, new, expected, old);
-}
-
-/* Spinlocks and rwspinlocks */
-
-int
-ethr_spinlock_init(ethr_spinlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_spinlock_init__(lock);
-}
-
-int
-ethr_spinlock_destroy(ethr_spinlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_spinlock_destroy__(lock);
-}
-
-
-int
-ethr_spin_unlock(ethr_spinlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_spin_unlock__(lock);
-}
-
-int
-ethr_spin_lock(ethr_spinlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_spin_lock__(lock);
-}
-
-int
-ethr_rwlock_init(ethr_rwlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_rwlock_init__(lock);
-}
-
-int
-ethr_rwlock_destroy(ethr_rwlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_rwlock_destroy__(lock);
-}
-
-int
-ethr_read_unlock(ethr_rwlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_read_unlock__(lock);
-}
-
-int
-ethr_read_lock(ethr_rwlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_read_lock__(lock);
-}
-
-int
-ethr_write_unlock(ethr_rwlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_write_unlock__(lock);
-}
-
-int
-ethr_write_lock(ethr_rwlock_t *lock)
-{
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!lock) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- return ethr_write_lock__(lock);
-}
-
-
-int
-ethr_gate_init(ethr_gate *gp)
-{
- int res;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!gp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_init(&gp->mtx);
- if (res != 0)
- return res;
- res = ethr_cond_init(&gp->cnd);
- if (res != 0) {
- ethr_mutex_destroy(&gp->mtx);
- return res;
- }
- gp->open = 0;
- return 0;
-}
-
-int
-ethr_gate_destroy(ethr_gate *gp)
-{
- int res, dres;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!gp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_destroy(&gp->mtx);
- dres = ethr_cond_destroy(&gp->cnd);
- if (res == 0)
- res = dres;
- gp->open = 0;
- return res;
-}
-
-int
-ethr_gate_close(ethr_gate *gp)
-{
- int res;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!gp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_lock__(&gp->mtx);
- if (res != 0)
- return res;
- gp->open = 0;
- res = ethr_mutex_unlock__(&gp->mtx);
- return res;
-}
-
-int
-ethr_gate_let_through(ethr_gate *gp, unsigned no)
-{
- int res, ures;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!gp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_lock__(&gp->mtx);
- if (res != 0)
- return res;
- gp->open += no;
- res = (gp->open == 1
- ? ethr_cond_signal(&gp->cnd)
- : ethr_cond_broadcast(&gp->cnd));
- ures = ethr_mutex_unlock__(&gp->mtx);
- if (res != 0)
- res = ures;
- return res;
-}
-
-int
-ethr_gate_swait(ethr_gate *gp, int spincount)
-{
- int res, ures, n;
-#if ETHR_XCHK
- if (ethr_not_inited) {
- ASSERT(0);
- return EACCES;
- }
- if (!gp) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- n = spincount;
- res = ethr_mutex_lock__(&gp->mtx);
- if (res != 0)
- return res;
- while (n >= 0 && !gp->open) {
- res = ethr_mutex_unlock__(&gp->mtx);
- if (res != 0)
- return res;
- res = ethr_mutex_lock__(&gp->mtx);
- if (res != 0)
- return res;
- n--;
- }
- while (!gp->open) {
- res = ethr_cond_wait(&gp->cnd, &gp->mtx);
- if (res != 0 && res != EINTR)
- goto done;
- }
- gp->open--;
- done:
- ures = ethr_mutex_unlock__(&gp->mtx);
- if (res == 0)
- res = ures;
- return res;
-}
-
-
-int
-ethr_gate_wait(ethr_gate *gp)
-{
- return ethr_gate_swait(gp, 0);
-}
-
-
-/* rwmutex fallback */
-#ifdef ETHR_USE_RWMTX_FALLBACK
-
-int
-ethr_rwmutex_init(ethr_rwmutex *rwmtx)
-{
- int res;
-#if ETHR_XCHK
- if (!rwmtx) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_init(&rwmtx->mtx);
- if (res != 0)
- return res;
- ethr_cond_init(&rwmtx->rcnd);
- if (res != 0)
- goto error_cleanup1;
- res = ethr_cond_init(&rwmtx->wcnd);
- if (res != 0)
- goto error_cleanup2;
- rwmtx->readers = 0;
- rwmtx->waiting_readers = 0;
- rwmtx->waiting_writers = 0;
-#if ETHR_XCHK
- rwmtx->initialized = ETHR_RWMUTEX_INITIALIZED;
-#endif
- return 0;
- error_cleanup2:
- ethr_cond_destroy(&rwmtx->rcnd);
- error_cleanup1:
- ethr_mutex_destroy(&rwmtx->mtx);
- return res;
-}
-
-int
-ethr_rwmutex_destroy(ethr_rwmutex *rwmtx)
-{
- int res, pres;
-#if ETHR_XCHK
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
- rwmtx->initialized = 0;
-#endif
- res = ethr_mutex_destroy(&rwmtx->mtx);
- pres = ethr_cond_destroy(&rwmtx->rcnd);
- if (res == 0)
- res = pres;
- pres = ethr_cond_destroy(&rwmtx->wcnd);
- if (res == 0)
- res = pres;
- return res;
-}
-
-int
-ethr_rwmutex_tryrlock(ethr_rwmutex *rwmtx)
-{
- int res;
-#if ETHR_XCHK
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_trylock__(&rwmtx->mtx);
- if (res != 0)
- return res;
- if (rwmtx->waiting_writers) {
- res = ethr_mutex_unlock__(&rwmtx->mtx);
- if (res == 0)
- return EBUSY;
- return res;
- }
- rwmtx->readers++;
- return ethr_mutex_unlock__(&rwmtx->mtx);
-}
-
-int
-ethr_rwmutex_rlock(ethr_rwmutex *rwmtx)
-{
- int res;
-#if ETHR_XCHK
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_lock__(&rwmtx->mtx);
- if (res != 0)
- return res;
- while (rwmtx->waiting_writers) {
- rwmtx->waiting_readers++;
- res = ethr_cond_wait(&rwmtx->rcnd, &rwmtx->mtx);
- rwmtx->waiting_readers--;
- if (res != 0 && res != EINTR) {
- (void) ethr_mutex_unlock__(&rwmtx->mtx);
- return res;
- }
- }
- rwmtx->readers++;
- return ethr_mutex_unlock__(&rwmtx->mtx);
-}
-
-int
-ethr_rwmutex_runlock(ethr_rwmutex *rwmtx)
-{
- int res, ures;
-#if ETHR_XCHK
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_lock__(&rwmtx->mtx);
- if (res != 0)
- return res;
- rwmtx->readers--;
- if (!rwmtx->readers && rwmtx->waiting_writers)
- res = ethr_cond_signal(&rwmtx->wcnd);
- ures = ethr_mutex_unlock__(&rwmtx->mtx);
- if (res == 0)
- res = ures;
- return res;
-}
-
-int
-ethr_rwmutex_tryrwlock(ethr_rwmutex *rwmtx)
-{
- int res;
-#if ETHR_XCHK
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_trylock__(&rwmtx->mtx);
- if (res != 0)
- return res;
- if (!rwmtx->readers && !rwmtx->waiting_writers)
- return 0;
- else {
- res = ethr_mutex_unlock__(&rwmtx->mtx);
- if (res == 0)
- return EBUSY;
- return res;
- }
-}
-
-int
-ethr_rwmutex_rwlock(ethr_rwmutex *rwmtx)
-{
- int res;
-#if ETHR_XCHK
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = ethr_mutex_lock__(&rwmtx->mtx);
- if (res != 0)
- return res;
- if (!rwmtx->readers && !rwmtx->waiting_writers)
- return 0;
-
- while (rwmtx->readers) {
- rwmtx->waiting_writers++;
- res = ethr_cond_wait(&rwmtx->wcnd, &rwmtx->mtx);
- rwmtx->waiting_writers--;
- if (res != 0 && res != EINTR) {
- (void) ethr_rwmutex_rwunlock(rwmtx);
- return res;
- }
- }
- return 0;
-}
-
-int
-ethr_rwmutex_rwunlock(ethr_rwmutex *rwmtx)
-{
- int res, ures;
-#if ETHR_XCHK
- if (!rwmtx || rwmtx->initialized != ETHR_RWMUTEX_INITIALIZED) {
- ASSERT(0);
- return EINVAL;
- }
-#endif
- res = 0;
- if (rwmtx->waiting_writers)
- res = ethr_cond_signal(&rwmtx->wcnd);
- else if (rwmtx->waiting_readers)
- res = ethr_cond_broadcast(&rwmtx->rcnd);
- ures = ethr_mutex_unlock__(&rwmtx->mtx);
- if (res == 0)
- res = ures;
- return res;
-}
-
-#endif /* #ifdef ETHR_USE_RWMTX_FALLBACK */
-
-void
-ethr_compiler_barrier(void)
-{
-
-}
-
-#ifdef DEBUG
-
-#include <stdio.h>
-int ethr_assert_failed(char *f, int l, char *a)
-{
- fprintf(stderr, "%s:%d: Assertion failed: %s\n", f, l, a);
- abort();
- return 0;
-}
-
-#endif
-
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 16:56:07 +0000