aboutsummaryrefslogtreecommitdiffstats
path: root/erts/lib_src/common/ethread.c
diff options
context:
space:
mode:
Diffstat (limited to 'erts/lib_src/common/ethread.c')
-rw-r--r--erts/lib_src/common/ethread.c3369
1 files changed, 0 insertions, 3369 deletions
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 2024-11-12 12:03:43 +0000