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Diffstat (limited to 'erts/lib_src/ose/ethread.c')
| -rw-r--r-- | erts/lib_src/ose/ethread.c | 654 |
1 files changed, 654 insertions, 0 deletions
diff --git a/erts/lib_src/ose/ethread.c b/erts/lib_src/ose/ethread.c new file mode 100644 index 0000000000..7d5101d115 --- /dev/null +++ b/erts/lib_src/ose/ethread.c @@ -0,0 +1,654 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2010-2011. 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: OSE implementation of the ethread library + * Author: Lukas Larsson + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <stdio.h> +#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 <limits.h> + +#define ETHR_INLINE_FUNC_NAME_(X) X ## __ +#define ETHREAD_IMPL__ + +#include "ethread.h" +#include "ethr_internal.h" + +#include "erl_printf.h" +#include "efs.h" + +#include "ose_spi.h" + +#include "string.h" + +#ifndef ETHR_HAVE_ETHREAD_DEFINES +#error Missing configure defines +#endif + +#define ETHR_INVALID_TID_ID -1 + +static ethr_tid main_thr_tid; +static const char* own_tid_key = "ethread_own_tid"; +char* ethr_ts_event_key__ = "ethread_tse"; + +#define ETHREADWRAPDATASIG 1 + +/* Init data sent to thr_wrapper() */ +typedef struct { + SIGSELECT sig_no; + ethr_ts_event *tse; + ethr_tid *tid; + ethr_sint32_t result; + void *(*thr_func)(void *); + void *arg; + void *prep_func_res; + const char *name; +} ethr_thr_wrap_data__; + +union SIGNAL { + SIGSELECT sig_no; + ethr_thr_wrap_data__ data; +}; + +#define ETHR_GET_OWN_TID__ ((ethr_tid *) get_envp(current_process(),\ + own_tid_key)) + +/* + * -------------------------------------------------------------------------- + * Static functions + * -------------------------------------------------------------------------- + */ + +static PROCESS blockId(void) { + static PROCESS bid = (PROCESS)0; + + if (bid == 0) { + bid = create_block("Erlang-VM", 0, 0, 0, 0); + } + + return bid; +} + +static void thr_exit_cleanup(ethr_tid *tid, void *res) +{ + + ETHR_ASSERT(tid == ETHR_GET_OWN_TID__); + + tid->res = res; + + ethr_run_exit_handlers__(); + ethr_ts_event_destructor__((void *) ethr_get_tse__()); +} + +/* For debug purpose. The process name will be stored in a per-process pointer + * for quick access. + */ +static OSPPDKEY nameKey = 0; + +//static OS_PROCESS(thr_wrapper); +static OS_PROCESS(thr_wrapper) +{ + ethr_tid my_tid; + ethr_sint32_t result; + void *res; + void *(*thr_func)(void *); + void *arg; + ethr_ts_event *tsep = NULL; + + { + PROCESS pid = current_process(); + + const char *execMode = get_pid_info(pid, OSE_PI_SUPERVISOR) + ? "Supervisor" + : "User"; + PROCESS bid = get_bid(pid); + + /* In the call below, 16 is a secret number provided by frbr that makes + * the function return current domain. */ + OSADDRESS domain = get_pid_info(current_process(), 16); + + fprintf(stderr,"[0x%x] New process. Bid:0x%x, domain:%d, exec mode:%s\n", + current_process(), bid, domain, execMode); + } + + { + SIGSELECT sigsel[] = {1,ETHREADWRAPDATASIG}; + union SIGNAL *init_msg = receive(sigsel); + + { + char **name = (char**)ose_get_ppdata(nameKey); + + *name = (char*)alloc(strlen(init_msg->data.name)+1, 0); + strcpy(*name, init_msg->data.name); + } + + thr_func = init_msg->data.thr_func; + arg = init_msg->data.arg; + + result = (ethr_sint32_t) ethr_make_ts_event__(&tsep); + + if (result == 0) { + tsep->iflgs |= ETHR_TS_EV_ETHREAD; + my_tid = *init_msg->data.tid; + set_envp(current_process(), own_tid_key, (OSADDRESS)&my_tid); + if (ethr_thr_child_func__) + ethr_thr_child_func__(init_msg->data.prep_func_res); + } + + init_msg->data.result = result; + + send(&init_msg,sender(&init_msg)); + } + + /* pthread mutex api says we have to do this */ + /*erts_fprintf(stderr, "(%s / %d) curr_pid 0x%x / signal_fsem to 0x%x (fsem val %d)\n", + __FUNCTION__, __LINE__, current_process(), current_process(), get_fsem(current_process()));*/ + signal_fsem(current_process()); + ETHR_ASSERT(get_fsem(current_process()) == 0); + + res = result == 0 ? (*thr_func)(arg) : NULL; + + thr_exit_cleanup(&my_tid, res); +} + +/* internal exports */ + +int ethr_set_tse__(ethr_ts_event *tsep) +{ + return set_envp(current_process(),ethr_ts_event_key__, (OSADDRESS) tsep); +} + +ethr_ts_event *ethr_get_tse__(void) +{ + return (ethr_ts_event *) get_envp(current_process(),ethr_ts_event_key__); +} + +#if defined(ETHR_PPC_RUNTIME_CONF__) + +static int +ppc_init__(void) +{ + int pid; + + + ethr_runtime__.conf.have_lwsync = 0; + + return 0; +} + +#endif + +#if defined(ETHR_X86_RUNTIME_CONF__) + +void +ethr_x86_cpuid__(int *eax, int *ebx, int *ecx, int *edx) +{ +#if ETHR_SIZEOF_PTR == 4 + int have_cpuid; + /* + * If it is possible to toggle eflags bit 21, + * we have the cpuid instruction. + */ + __asm__ ("pushf\n\t" + "popl %%eax\n\t" + "movl %%eax, %%ecx\n\t" + "xorl $0x200000, %%eax\n\t" + "pushl %%eax\n\t" + "popf\n\t" + "pushf\n\t" + "popl %%eax\n\t" + "movl $0x0, %0\n\t" + "xorl %%ecx, %%eax\n\t" + "jz no_cpuid\n\t" + "movl $0x1, %0\n\t" + "no_cpuid:\n\t" + : "=r"(have_cpuid) + : + : "%eax", "%ecx", "cc"); + if (!have_cpuid) { + *eax = *ebx = *ecx = *edx = 0; + return; + } +#endif +#if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__ + /* + * When position independet code is used in 32-bit mode, the B register + * is used for storage of global offset table address, and we may not + * use it as input or output in an asm. We need to save and restore the + * B register explicitly (for some reason gcc doesn't provide this + * service to us). + */ + __asm__ ("pushl %%ebx\n\t" + "cpuid\n\t" + "movl %%ebx, %1\n\t" + "popl %%ebx\n\t" + : "=a"(*eax), "=r"(*ebx), "=c"(*ecx), "=d"(*edx) + : "0"(*eax) + : "cc"); +#else + __asm__ ("cpuid\n\t" + : "=a"(*eax), "=b"(*ebx), "=c"(*ecx), "=d"(*edx) + : "0"(*eax) + : "cc"); +#endif +} + +#endif /* ETHR_X86_RUNTIME_CONF__ */ + +/* + * -------------------------------------------------------------------------- + * Exported functions + * -------------------------------------------------------------------------- + */ + +int +ethr_init(ethr_init_data *id) +{ + int res; + + if (!ethr_not_inited__) + return EINVAL; + + +#if defined(ETHR_PPC_RUNTIME_CONF__) + res = ppc_init__(); + if (res != 0) + goto error; +#endif + + res = ethr_init_common__(id); + if (res != 0) + goto error; + + main_thr_tid.id = current_process(); + main_thr_tid.tsd_key_index = 0; + + set_envp(current_process(),own_tid_key,(OSADDRESS)&main_thr_tid); + /*erts_fprintf(stderr, "(%s / %d) curr_pid 0x%x / signal_fsem to 0x%x (fsem_val %d)\n", + __FUNCTION__, __LINE__, current_process(), current_process(), get_fsem(current_process()));*/ + signal_fsem(current_process()); + + ETHR_ASSERT(&main_thr_tid == ETHR_GET_OWN_TID__); + + ose_create_ppdata("ProcName", &nameKey); + + ethr_not_inited__ = 0; + + return 0; + error: + ethr_not_inited__ = 1; + return res; + +} + +int +ethr_late_init(ethr_late_init_data *id) +{ + int res = ethr_late_init_common__(id); + if (res != 0) + return res; + ethr_not_completely_inited__ = 0; + return res; +} + +int +ethr_thr_create(ethr_tid *tid, void * (*func)(void *), void *arg, + ethr_thr_opts *opts) +{ + int res; + int use_stack_size = (opts && opts->suggested_stack_size >= 0 + ? opts->suggested_stack_size + : 0x200 /* Use system default */); + union SIGNAL *init_msg; + SIGSELECT sigsel[] = {1,ETHREADWRAPDATASIG}; + void *prep_func_res; + +#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_completely_inited__) { + ETHR_ASSERT(0); + return EACCES; + } + if (!tid || !func) { + ETHR_ASSERT(0); + return EINVAL; + } +#endif + + if (use_stack_size >= 0) { + size_t suggested_stack_size = (size_t) use_stack_size; + size_t stack_size; +#ifdef ETHR_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 < ethr_min_stack_size__) + stack_size = ETHR_KW2B(ethr_min_stack_size__); + else if (suggested_stack_size > ethr_max_stack_size__) + stack_size = ETHR_KW2B(ethr_max_stack_size__); + else + stack_size = ETHR_PAGE_ALIGN(ETHR_KW2B(suggested_stack_size)); + use_stack_size = stack_size; + } + + init_msg = alloc(sizeof(ethr_thr_wrap_data__), ETHREADWRAPDATASIG); + + /* Call prepare func if it exist */ + if (ethr_thr_prepare_func__) + init_msg->data.prep_func_res = ethr_thr_prepare_func__(); + else + init_msg->data.prep_func_res = NULL; + + /*erts_fprintf(stderr, "creating process %s / stack %d\n", opts->name, use_stack_size);*/ + +#if 0 + ramlog_printf("[0x%x] process '%s', coreNo = %u\n", + current_process(), opts->name, opts->coreNo); +#endif + tid->id = create_process(/*OS_PRI_PROC*/OS_BG_PROC, opts->name, thr_wrapper, + use_stack_size, /*opts->prio+5*/31, 0, + blockId(), NULL, 0, 0); + + if (ose_bind_process(tid->id, opts->coreNo)) { + printf("[0x%x] Binding pid 0x%x (%s) to core no %u.\n", + current_process(), tid->id, opts->name, opts->coreNo); + } + + /*FIXME!!! Normally this shouldn't be used in shared mode. Still there is + * a problem with stdin fd in fd_ processes which should be further + * investigated */ + efs_clone(tid->id); + + tid->tsd_key_index = 0; + tid->res = NULL; + + init_msg->data.tse = ethr_get_ts_event(); + init_msg->data.thr_func = func; + init_msg->data.arg = arg; + init_msg->data.tid = tid; + init_msg->data.name = opts->name; + + send(&init_msg, tid->id); + + start(tid->id); + init_msg = receive(sigsel); + + res = init_msg->data.result; + prep_func_res = init_msg->data.prep_func_res; + + free_buf(&init_msg); + /* Cleanup... */ + + if (ethr_thr_parent_func__) + ethr_thr_parent_func__(prep_func_res); + + return res; +} + +int +ethr_thr_join(ethr_tid tid, void **res) +{ + SIGSELECT sigsel[] = {1,OS_ATTACH_SIG}; +#if ETHR_XCHK + if (ethr_not_inited__) { + ETHR_ASSERT(0); + return EACCES; + } +#endif + + if (tid.id == ETHR_INVALID_TID_ID) + return EINVAL; + + attach(NULL,tid.id); + receive(sigsel); + + if (res) + *res = tid.res; + + return 0; +} + +int +ethr_thr_detach(ethr_tid tid) +{ +#if ETHR_XCHK + if (ethr_not_inited__) { + ETHR_ASSERT(0); + return EACCES; + } +#endif + return 0; +} + +void +ethr_thr_exit(void *res) +{ + ethr_tid *tid; +#if ETHR_XCHK + if (ethr_not_inited__) { + ETHR_ASSERT(0); + return; + } +#endif + tid = ETHR_GET_OWN_TID__; + if (!tid) { + ETHR_ASSERT(0); + kill_proc(current_process()); + } + thr_exit_cleanup(tid, res); + /* Harakiri possible? */ + kill_proc(current_process()); +} + +ethr_tid +ethr_self(void) +{ + ethr_tid *tid; +#if ETHR_XCHK + if (ethr_not_inited__) { + ethr_tid dummy_tid = {ETHR_INVALID_TID_ID, 0, NULL}; + ETHR_ASSERT(0); + return dummy_tid; + } +#endif + tid = ETHR_GET_OWN_TID__; + if (!tid) { + ethr_tid dummy_tid = {ETHR_INVALID_TID_ID, 0, NULL}; + return dummy_tid; + } + return *tid; +} + +int +ethr_equal_tids(ethr_tid tid1, ethr_tid tid2) +{ + return tid1.id == tid2.id && tid1.id != ETHR_INVALID_TID_ID; +} + + +/* + * Thread specific events + */ + +ethr_ts_event * +ethr_get_ts_event(void) +{ + return ethr_get_ts_event__(); +} + +void +ethr_leave_ts_event(ethr_ts_event *tsep) +{ + ethr_leave_ts_event__(tsep); +} + +/* + * Thread specific data + */ + +int +ethr_tsd_key_create(ethr_tsd_key *keyp) +{ + ethr_tid *tid = ETHR_GET_OWN_TID__; + ethr_tsd_key key; + +#if ETHR_XCHK + if (ethr_not_inited__) { + ETHR_ASSERT(0); + return EACCES; + } + if (!keyp) { + ETHR_ASSERT(0); + return EINVAL; + } +#endif + if (tid->tsd_key_index > 999) + return EAGAIN; + + /* ethread_tsd_key_YYYYYYYY_XXX\0 */ + key = malloc(sizeof(ethr_tsd_key)+sizeof(char)*(strlen("ethread_tsd_key_0xYYYYYYYY_XXX")+1)); + /* What do we do it tds_key_index happens to wrap? Slot search? */ + sprintf(key->key,"ethread_tsd_key_0x%x_%d",tid->id,tid->tsd_key_index++); + key->id = current_process(); + + *keyp = key; + + return 0; +} + +int +ethr_tsd_key_delete(ethr_tsd_key key) +{ +#if ETHR_XCHK + if (ethr_not_inited__) { + ETHR_ASSERT(0); + return EACCES; + } +#endif + free(key); + return 0; +} + +int +ethr_tsd_set(ethr_tsd_key key, void *value) +{ +#if ETHR_XCHK + if (ethr_not_inited__) { + ETHR_ASSERT(0); + return EACCES; + } +#endif + return set_envp(current_process(), key->key, (OSADDRESS)value)?0:1; +} + +void * +ethr_tsd_get(ethr_tsd_key key) +{ +#if ETHR_XCHK + if (ethr_not_inited__) { + ETHR_ASSERT(0); + return NULL; + } +#endif + return (void*)get_envp(current_process(),key->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__) { + ETHR_ASSERT(0); + return EACCES; + } + if (!set && !oset) { + ETHR_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__) { + ETHR_ASSERT(0); + return EACCES; + } + if (!set || !sig) { + ETHR_ASSERT(0); + return EINVAL; + } +#endif + if (sigwait(set, sig) < 0) + return errno; + return 0; +} + +#endif /* #if ETHR_HAVE_ETHR_SIG_FUNCS */ + +ETHR_IMPL_NORETURN__ +ethr_abort__(void) +{ + abort(); +} + +const char *procName(void); +const char * +procName(void) { + char **procName_p = (char**)ose_get_ppdata(nameKey); + if (procName_p) { + return *procName_p; + } + + return NULL; +} |