X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d6ae7b948dffd7f9268106a86f9de21d7d0a3621..6ced0985aaa3ec81be59edb34c1753a9c9b9751a:/src/xbt/xbt_os_thread.c diff --git a/src/xbt/xbt_os_thread.c b/src/xbt/xbt_os_thread.c index 46196d6be7..dc723291cd 100644 --- a/src/xbt/xbt_os_thread.c +++ b/src/xbt/xbt_os_thread.c @@ -1,1006 +1,88 @@ -/* $Id$ */ - /* xbt_os_thread -- portability layer over the pthread API */ /* Used in RL to get win/lin portability, and in SG when CONTEXT_THREAD */ -/* in SG, when using CONTEXT_UCONTEXT, xbt_os_thread_stub is used instead */ +/* in SG, when using HAVE_UCONTEXT_CONTEXTS, xbt_os_thread_stub is used instead */ -/* Copyright 2006,2007 Malek Cherier, Martin Quinson - * All right reserved. */ +/* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ -#include "xbt/sysdep.h" -#include "xbt/ex.h" -#include "xbt/ex_interface.h" /* We play crude games with exceptions */ -#include "portable.h" -#include "xbt/xbt_os_time.h" /* Portable time facilities */ -#include "xbt/xbt_os_thread.h" /* This module */ -#include "xbt_modinter.h" /* Initialization/finalization of this module */ - -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync_os,xbt,"Synchronization mechanism (OS-level)"); - -/* ********************************* PTHREAD IMPLEMENTATION ************************************ */ -#ifdef HAVE_PTHREAD_H - -#include -#include - -#ifdef HAVE_MUTEX_TIMEDLOCK -/* redefine the function header since we fail to get this from system headers on amd (at least) */ -int pthread_mutex_timedlock(pthread_mutex_t *mutex, - const struct timespec *abs_timeout); -#endif - - -/* use named sempahore when sem_init() does not work */ -#ifndef HAVE_SEM_INIT - static int next_sem_ID = 0; - static xbt_os_mutex_t next_sem_ID_lock; -#endif - -typedef struct xbt_os_thread_ { - pthread_t t; - char *name; - void *param; - pvoid_f_pvoid_t start_routine; - ex_ctx_t *exception; -} s_xbt_os_thread_t ; -static xbt_os_thread_t main_thread = NULL; - -/* thread-specific data containing the xbt_os_thread_t structure */ -static pthread_key_t xbt_self_thread_key; -static int thread_mod_inited = 0; - -/* frees the xbt_os_thread_t corresponding to the current thread */ -static void xbt_os_thread_free_thread_data(void*d){ - free(d); -} - -/* callback: context fetching */ -static ex_ctx_t *_os_thread_ex_ctx(void) { - return xbt_os_thread_self()->exception; -} - -/* callback: termination */ -static void _os_thread_ex_terminate(xbt_ex_t * e) { - xbt_ex_display(e); - - abort(); - /* FIXME: there should be a configuration variable to choose to kill everyone or only this one */ -} - -void xbt_os_thread_mod_init(void) { - int errcode; - - if (thread_mod_inited) - return; - - if ((errcode=pthread_key_create(&xbt_self_thread_key, NULL))) - THROW0(system_error,errcode,"pthread_key_create failed for xbt_self_thread_key"); - - main_thread=xbt_new(s_xbt_os_thread_t,1); - main_thread->name = (char*)"main"; - main_thread->start_routine = NULL; - main_thread->param = NULL; - main_thread->exception = xbt_new(ex_ctx_t, 1); - XBT_CTX_INITIALIZE(main_thread->exception); - - __xbt_ex_ctx = _os_thread_ex_ctx; - __xbt_ex_terminate = _os_thread_ex_terminate; - - thread_mod_inited = 1; - - #ifndef HAVE_SEM_WAIT - next_sem_ID_lock = xbt_os_mutex_init(); - #endif - -} -void xbt_os_thread_mod_exit(void) { - /* FIXME: don't try to free our key on shutdown. - Valgrind detects no leak if we don't, and whine if we try to */ -// int errcode; - -// if ((errcode=pthread_key_delete(xbt_self_thread_key))) -// THROW0(system_error,errcode,"pthread_key_delete failed for xbt_self_thread_key"); - free(main_thread->exception); - free(main_thread); - main_thread = NULL; - thread_mod_inited=0; -#ifndef HAVE_SEM_WAIT - xbt_os_mutex_destroy(next_sem_ID_lock); -#endif -} - -static void * wrapper_start_routine(void *s) { - xbt_os_thread_t t = s; - int errcode; - - if ((errcode=pthread_setspecific(xbt_self_thread_key,t))) - THROW0(system_error,errcode, - "pthread_setspecific failed for xbt_self_thread_key"); - - return (*(t->start_routine))(t->param); -} - -xbt_os_thread_t xbt_os_thread_create(const char*name, - pvoid_f_pvoid_t start_routine, - void* param) { - int errcode; - - xbt_os_thread_t res_thread=xbt_new(s_xbt_os_thread_t,1); - res_thread->name = xbt_strdup(name); - res_thread->start_routine = start_routine; - res_thread->param = param; - res_thread->exception = xbt_new(ex_ctx_t, 1); - XBT_CTX_INITIALIZE(res_thread->exception); - - if ((errcode = pthread_create(&(res_thread->t), NULL, - wrapper_start_routine, res_thread))) - THROW1(system_error,errcode, - "pthread_create failed: %s",strerror(errcode)); - - return res_thread; -} - -const char* xbt_os_thread_name(xbt_os_thread_t t) { - return t->name; -} - -const char* xbt_os_thread_self_name(void) { - xbt_os_thread_t self = xbt_os_thread_self(); - return self?self->name:"main"; -} -void -xbt_os_thread_join(xbt_os_thread_t thread,void ** thread_return) { - - int errcode; - - if ((errcode = pthread_join(thread->t,thread_return))) - THROW1(system_error,errcode, "pthread_join failed: %s", - strerror(errcode)); - if (thread->exception) - free(thread->exception); - - if (thread->name) - free(thread->name); - - if (thread == main_thread) /* just killed main thread */ - main_thread = NULL; - - free(thread); -} - -void xbt_os_thread_exit(int *retval) { - pthread_exit(retval); -} - -xbt_os_thread_t xbt_os_thread_self(void) { - xbt_os_thread_t res; - - if (!thread_mod_inited) - return NULL; - - res = pthread_getspecific(xbt_self_thread_key); - if (!res) - res = main_thread; - - return res; -} - +#include "src/internal_config.h" +#if HAVE_PTHREAD_SETAFFINITY +#define _GNU_SOURCE #include -void xbt_os_thread_yield(void) { - sched_yield(); -} -void xbt_os_thread_cancel(xbt_os_thread_t t) { - pthread_cancel(t->t); -} -/****** mutex related functions ******/ -typedef struct xbt_os_mutex_ { - /* KEEP IT IN SYNC WITH xbt_thread.c */ - pthread_mutex_t m; -} s_xbt_os_mutex_t; - -#include -#include - -xbt_os_mutex_t xbt_os_mutex_init(void) { - xbt_os_mutex_t res = xbt_new(s_xbt_os_mutex_t,1); - int errcode; - - if ((errcode = pthread_mutex_init(&(res->m),NULL))) - THROW1(system_error,errcode,"pthread_mutex_init() failed: %s", - strerror(errcode)); - - return res; -} - -void xbt_os_mutex_acquire(xbt_os_mutex_t mutex) { - int errcode; - - if ((errcode=pthread_mutex_lock(&(mutex->m)))) - THROW2(system_error,errcode,"pthread_mutex_lock(%p) failed: %s", - mutex, strerror(errcode)); -} - - -void xbt_os_mutex_timedacquire(xbt_os_mutex_t mutex, double delay) { - int errcode; - - if (delay < 0) { - xbt_os_mutex_acquire(mutex); - - } else if (delay == 0) { - errcode=pthread_mutex_trylock(&(mutex->m)); - - switch (errcode) { - case 0: - return; - case ETIMEDOUT: - THROW1(timeout_error,0,"mutex %p not ready",mutex); - default: - THROW2(system_error,errcode,"xbt_mutex_timedacquire(%p) failed: %s",mutex, strerror(errcode)); - } - - - } else { - -#ifdef HAVE_MUTEX_TIMEDLOCK - struct timespec ts_end; - double end = delay + xbt_os_time(); - - ts_end.tv_sec = (time_t) floor(end); - ts_end.tv_nsec = (long) ( ( end - ts_end.tv_sec) * 1000000000); - DEBUG2("pthread_mutex_timedlock(%p,%p)",&(mutex->m), &ts_end); - - errcode=pthread_mutex_timedlock(&(mutex->m),&ts_end); - -#else /* Well, let's reimplement it since those lazy libc dudes didn't */ - double start = xbt_os_time(); - do { - errcode = pthread_mutex_trylock(&(mutex->m)); - if (errcode == EBUSY) - xbt_os_thread_yield(); - } while (errcode == EBUSY && xbt_os_time()-start m)))) - THROW2(system_error,errcode,"pthread_mutex_unlock(%p) failed: %s", - mutex, strerror(errcode)); -} - -void xbt_os_mutex_destroy(xbt_os_mutex_t mutex) { - int errcode; - - if (!mutex) return; - - if ((errcode=pthread_mutex_destroy(&(mutex->m)))) - THROW2(system_error,errcode,"pthread_mutex_destroy(%p) failed: %s", - mutex, strerror(errcode)); - free(mutex); -} - -/***** condition related functions *****/ -typedef struct xbt_os_cond_ { - /* KEEP IT IN SYNC WITH xbt_thread.c */ - pthread_cond_t c; -} s_xbt_os_cond_t; - -xbt_os_cond_t xbt_os_cond_init(void) { - xbt_os_cond_t res = xbt_new(s_xbt_os_cond_t,1); - int errcode; - if ((errcode=pthread_cond_init(&(res->c),NULL))) - THROW1(system_error,errcode,"pthread_cond_init() failed: %s", - strerror(errcode)); - - return res; -} - -void xbt_os_cond_wait(xbt_os_cond_t cond, xbt_os_mutex_t mutex) { - int errcode; - if ((errcode=pthread_cond_wait(&(cond->c),&(mutex->m)))) - THROW3(system_error,errcode,"pthread_cond_wait(%p,%p) failed: %s", - cond,mutex, strerror(errcode)); -} - - -void xbt_os_cond_timedwait(xbt_os_cond_t cond, xbt_os_mutex_t mutex, double delay) { - int errcode; - struct timespec ts_end; - double end = delay + xbt_os_time(); - - if (delay < 0) { - xbt_os_cond_wait(cond,mutex); - } else { - ts_end.tv_sec = (time_t) floor(end); - ts_end.tv_nsec = (long) ( ( end - ts_end.tv_sec) * 1000000000); - DEBUG3("pthread_cond_timedwait(%p,%p,%p)",&(cond->c),&(mutex->m), &ts_end); - switch ( (errcode=pthread_cond_timedwait(&(cond->c),&(mutex->m), &ts_end)) ) { - case 0: - return; - case ETIMEDOUT: - THROW3(timeout_error,errcode,"condition %p (mutex %p) wasn't signaled before timeout (%f)", - cond,mutex, delay); - default: - THROW4(system_error,errcode,"pthread_cond_timedwait(%p,%p,%f) failed: %s", - cond,mutex, delay, strerror(errcode)); - } - } -} - -void xbt_os_cond_signal(xbt_os_cond_t cond) { - int errcode; - if ((errcode=pthread_cond_signal(&(cond->c)))) - THROW2(system_error,errcode,"pthread_cond_signal(%p) failed: %s", - cond, strerror(errcode)); -} - -void xbt_os_cond_broadcast(xbt_os_cond_t cond){ - int errcode; - if ((errcode=pthread_cond_broadcast(&(cond->c)))) - THROW2(system_error,errcode,"pthread_cond_broadcast(%p) failed: %s", - cond, strerror(errcode)); -} -void xbt_os_cond_destroy(xbt_os_cond_t cond){ - int errcode; - - if (!cond) return; - - if ((errcode=pthread_cond_destroy(&(cond->c)))) - THROW2(system_error,errcode,"pthread_cond_destroy(%p) failed: %s", - cond, strerror(errcode)); - free(cond); -} - -void *xbt_os_thread_getparam(void) { - xbt_os_thread_t t = xbt_os_thread_self(); - return t?t->param:NULL; -} - -typedef struct xbt_os_sem_ { - #ifndef HAVE_SEM_INIT - char* name; - #endif - sem_t s; - sem_t *ps; -}s_xbt_os_sem_t ; - -#ifndef SEM_FAILED -#define SEM_FAILED (-1) #endif -xbt_os_sem_t -xbt_os_sem_init(unsigned int value) { - xbt_os_sem_t res = xbt_new(s_xbt_os_sem_t,1); - - /* On some systems (MAC OS X), only the stub of sem_init is to be found. - * Any attempt to use it leads to ENOSYS (function not implemented). - * If such a prehistoric system is detected, do the job with sem_open instead - */ -#ifdef HAVE_SEM_INIT - if(sem_init(&(res->s),0,value) != 0) - THROW1(system_error,errno,"sem_init() failed: %s", strerror(errno)); - res->ps = &(res->s); - -#else /* damn, no sem_init(). Reimplement it */ - - xbt_os_mutex_acquire(next_sem_ID_lock); - res->name = bprintf("/%d.%d",(*xbt_getpid)(),++next_sem_ID); - xbt_os_mutex_release(next_sem_ID_lock); - - res->ps = sem_open(res->name, O_CREAT, 0644, value); - if ((res->ps == (sem_t *)SEM_FAILED) && (errno == ENAMETOOLONG)) { - /* Old darwins only allow 13 chars. Did you create *that* amount of semaphores? */ - res->name[13] = '\0'; - res->ps = sem_open(res->name, O_CREAT, 0644, 1); - } - if ((res->ps == (sem_t *)SEM_FAILED)) - THROW1(system_error,errno,"sem_open() failed: %s",strerror(errno)); - - /* Remove the name from the semaphore namespace: we never join on it */ - if(sem_unlink(res->name) < 0) - THROW1(system_error,errno,"sem_unlink() failed: %s", strerror(errno)); - -#endif - - return res; -} - -void -xbt_os_sem_acquire(xbt_os_sem_t sem) { - if(!sem) - THROW0(arg_error,EINVAL,"Cannot acquire of the NULL semaphore"); - if(sem_wait(sem->ps) < 0) - THROW1(system_error,errno,"sem_wait() failed: %s", strerror(errno)); -} - -void xbt_os_sem_timedacquire(xbt_os_sem_t sem, double delay) { - int errcode; - - if(!sem) - THROW0(arg_error,EINVAL,"Cannot acquire of the NULL semaphore"); - - if (delay < 0) { - xbt_os_sem_acquire(sem); - } else if (delay==0) { - errcode = sem_trywait(sem->ps); - - switch (errcode) { - case 0: - return; - case ETIMEDOUT: - THROW1(timeout_error,0,"semaphore %p not ready",sem); - default: - THROW2(system_error,errcode,"xbt_os_sem_timedacquire(%p) failed: %s",sem, strerror(errcode)); - } - - } else { -#ifdef HAVE_SEM_WAIT - struct timespec ts_end; - double end = delay + xbt_os_time(); - - ts_end.tv_sec = (time_t) floor(end); - ts_end.tv_nsec = (long) ( ( end - ts_end.tv_sec) * 1000000000); - DEBUG2("sem_timedwait(%p,%p)",sem->ps,&ts_end); - errcode = sem_timedwait(sem->s,&ts_end); - -#else /* Okay, reimplement this function then */ - double start = xbt_os_time(); - do { - errcode = sem_trywait(sem->ps); - if (errcode == EBUSY) - xbt_os_thread_yield(); - } while (errcode == EBUSY && xbt_os_time()-start ps) < 0) - THROW1(system_error,errno,"sem_post() failed: %s", - strerror(errno)); -} - -void -xbt_os_sem_destroy(xbt_os_sem_t sem) -{ - if(!sem) - THROW0(arg_error,EINVAL,"Cannot destroy the NULL sempahore"); +#include -#ifdef HAVE_SEM_INIT - if(sem_destroy(sem->ps)) < 0) - THROW1(system_error,errno,"sem_destroy() failed: %s", - strerror(errno)); +#include +#include +#include + +#if defined(_WIN32) +#include +#elif defined(__MACH__) && defined(__APPLE__) +#include +#include +#include #else - if(sem_close(sem->ps) < 0) - THROW1(system_error,errno,"sem_close() failed: %s", - strerror(errno)); - xbt_free(sem->name); - +#include #endif - xbt_free(sem); -} -void -xbt_os_sem_get_value(xbt_os_sem_t sem, int* svalue) -{ - if(!sem) - THROW0(arg_error,EINVAL,"Cannot get the value of the NULL semaphore"); - - if(sem_getvalue(&(sem->s),svalue) < 0) - THROW1(system_error,errno,"sem_getvalue() failed: %s", - strerror(errno)); -} - -/* ********************************* WINDOWS IMPLEMENTATION ************************************ */ - -#elif defined(WIN32) +#include "xbt/sysdep.h" +#include "xbt/ex.h" +#include "src/internal_config.h" +#include "xbt/xbt_os_time.h" /* Portable time facilities */ +#include "xbt/xbt_os_thread.h" /* This module */ +#include "src/xbt_modinter.h" /* Initialization/finalization of this module */ -#include +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync_os, xbt, "Synchronization mechanism (OS-level)"); typedef struct xbt_os_thread_ { - char *name; - HANDLE handle; /* the win thread handle */ - unsigned long id; /* the win thread id */ + pthread_t t; + void *param; pvoid_f_pvoid_t start_routine; - void* param; -} s_xbt_os_thread_t ; - -/* so we can specify the size of the stack of the threads */ -#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION -#define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000 -#endif - -/* the default size of the stack of the threads (in bytes)*/ -#define XBT_DEFAULT_THREAD_STACK_SIZE 4096 - -/* key to the TLS containing the xbt_os_thread_t structure */ -static unsigned long xbt_self_thread_key; - -void xbt_os_thread_mod_init(void) { - xbt_self_thread_key = TlsAlloc(); -} -void xbt_os_thread_mod_exit(void) { - - if (!TlsFree(xbt_self_thread_key)) - THROW0(system_error,(int)GetLastError(),"TlsFree() failed to cleanup the thread submodule"); -} - -static DWORD WINAPI wrapper_start_routine(void *s) { - xbt_os_thread_t t = (xbt_os_thread_t)s; - DWORD* rv; - - if(!TlsSetValue(xbt_self_thread_key,t)) - THROW0(system_error,(int)GetLastError(),"TlsSetValue of data describing the created thread failed"); - - rv = (DWORD*)((t->start_routine)(t->param)); - - return rv ? *rv : 0; - -} - - -xbt_os_thread_t xbt_os_thread_create(const char *name,pvoid_f_pvoid_t start_routine, - void* param) { - - xbt_os_thread_t t = xbt_new(s_xbt_os_thread_t,1); - - t->name = xbt_strdup(name); - t->start_routine = start_routine ; - t->param = param; - - t->handle = CreateThread(NULL,XBT_DEFAULT_THREAD_STACK_SIZE, - (LPTHREAD_START_ROUTINE)wrapper_start_routine, - t,STACK_SIZE_PARAM_IS_A_RESERVATION,&(t->id)); - - if(!t->handle) { - xbt_free(t); - THROW0(system_error,(int)GetLastError(),"CreateThread failed"); - } - - return t; -} - -const char* xbt_os_thread_name(xbt_os_thread_t t) { - return t->name; -} - -const char* xbt_os_thread_self_name(void) { - xbt_os_thread_t t = xbt_os_thread_self(); - return t?t->name:"main"; -} - -void -xbt_os_thread_join(xbt_os_thread_t thread,void ** thread_return) { - - if(WAIT_OBJECT_0 != WaitForSingleObject(thread->handle,INFINITE)) - THROW0(system_error,(int)GetLastError(), "WaitForSingleObject failed"); - - if(thread_return){ - - if(!GetExitCodeThread(thread->handle,(DWORD*)(*thread_return))) - THROW0(system_error,(int)GetLastError(), "GetExitCodeThread failed"); - } - - CloseHandle(thread->handle); - - if(thread->name) - free(thread->name); - - free(thread); -} - -void xbt_os_thread_exit(int *retval) { - if(retval) - ExitThread(*retval); - else - ExitThread(0); -} - -xbt_os_thread_t xbt_os_thread_self(void) { - return TlsGetValue(xbt_self_thread_key); -} - -void *xbt_os_thread_getparam(void) { - xbt_os_thread_t t = xbt_os_thread_self(); - return t->param; -} - - -void xbt_os_thread_yield(void) { - Sleep(0); -} -void xbt_os_thread_cancel(xbt_os_thread_t t) { - if(!TerminateThread(t->handle,0)) - THROW0(system_error,(int)GetLastError(), "TerminateThread failed"); -} +} s_xbt_os_thread_t; /****** mutex related functions ******/ typedef struct xbt_os_mutex_ { - /* KEEP IT IN SYNC WITH xbt_thread.c */ - CRITICAL_SECTION lock; + pthread_mutex_t m; } s_xbt_os_mutex_t; -xbt_os_mutex_t xbt_os_mutex_init(void) { - xbt_os_mutex_t res = xbt_new(s_xbt_os_mutex_t,1); - - /* initialize the critical section object */ - InitializeCriticalSection(&(res->lock)); - - return res; -} - -void xbt_os_mutex_acquire(xbt_os_mutex_t mutex) { - EnterCriticalSection(& mutex->lock); -} - -void xbt_os_mutex_timedacquire(xbt_os_mutex_t mutex, double delay) { - THROW_UNIMPLEMENTED; -} - -void xbt_os_mutex_release(xbt_os_mutex_t mutex) { - - LeaveCriticalSection (&mutex->lock); - -} - -void xbt_os_mutex_destroy(xbt_os_mutex_t mutex) { - - if (!mutex) return; - - DeleteCriticalSection(& mutex->lock); - free(mutex); -} - -/***** condition related functions *****/ - enum { /* KEEP IT IN SYNC WITH xbt_thread.c */ - SIGNAL = 0, - BROADCAST = 1, - MAX_EVENTS = 2 - }; - -typedef struct xbt_os_cond_ { - /* KEEP IT IN SYNC WITH xbt_thread.c */ - HANDLE events[MAX_EVENTS]; - - unsigned int waiters_count; /* the number of waiters */ - CRITICAL_SECTION waiters_count_lock; /* protect access to waiters_count */ -} s_xbt_os_cond_t; - -xbt_os_cond_t xbt_os_cond_init(void) { - - xbt_os_cond_t res = xbt_new0(s_xbt_os_cond_t,1); - - memset(& res->waiters_count_lock,0,sizeof(CRITICAL_SECTION)); - - /* initialize the critical section object */ - InitializeCriticalSection(& res->waiters_count_lock); - - res->waiters_count = 0; - - /* Create an auto-reset event */ - res->events[SIGNAL] = CreateEvent (NULL, FALSE, FALSE, NULL); - - if(!res->events[SIGNAL]){ - DeleteCriticalSection(& res->waiters_count_lock); - free(res); - THROW0(system_error,0,"CreateEvent failed for the signals"); - } - - /* Create a manual-reset event. */ - res->events[BROADCAST] = CreateEvent (NULL, TRUE, FALSE,NULL); - - if(!res->events[BROADCAST]){ - - DeleteCriticalSection(& res->waiters_count_lock); - CloseHandle(res->events[SIGNAL]); - free(res); - THROW0(system_error,0,"CreateEvent failed for the broadcasts"); - } - - return res; -} - -void xbt_os_cond_wait(xbt_os_cond_t cond, xbt_os_mutex_t mutex) { - - unsigned long wait_result; - int is_last_waiter; - - /* lock the threads counter and increment it */ - EnterCriticalSection (& cond->waiters_count_lock); - cond->waiters_count++; - LeaveCriticalSection (& cond->waiters_count_lock); - - /* unlock the mutex associate with the condition */ - LeaveCriticalSection (& mutex->lock); - - /* wait for a signal (broadcast or no) */ - wait_result = WaitForMultipleObjects (2, cond->events, FALSE, INFINITE); - - if(wait_result == WAIT_FAILED) - THROW0(system_error,0,"WaitForMultipleObjects failed, so we cannot wait on the condition"); - - /* we have a signal lock the condition */ - EnterCriticalSection (& cond->waiters_count_lock); - cond->waiters_count--; - - /* it's the last waiter or it's a broadcast ? */ - is_last_waiter = ((wait_result == WAIT_OBJECT_0 + BROADCAST - 1) && (cond->waiters_count == 0)); - - LeaveCriticalSection (& cond->waiters_count_lock); - - /* yes it's the last waiter or it's a broadcast - * only reset the manual event (the automatic event is reset in the WaitForMultipleObjects() function - * by the system. - */ - if (is_last_waiter) - if(!ResetEvent (cond->events[BROADCAST])) - THROW0(system_error,0,"ResetEvent failed"); - - /* relock the mutex associated with the condition in accordance with the posix thread specification */ - EnterCriticalSection (& mutex->lock); -} -void xbt_os_cond_timedwait(xbt_os_cond_t cond, xbt_os_mutex_t mutex, double delay) { - - unsigned long wait_result = WAIT_TIMEOUT; - int is_last_waiter; - unsigned long end = (unsigned long)(delay * 1000); - - - if (delay < 0) { - xbt_os_cond_wait(cond,mutex); - } else { - DEBUG3("xbt_cond_timedwait(%p,%p,%lu)",&(cond->events),&(mutex->lock),end); - - /* lock the threads counter and increment it */ - EnterCriticalSection (& cond->waiters_count_lock); - cond->waiters_count++; - LeaveCriticalSection (& cond->waiters_count_lock); - - /* unlock the mutex associate with the condition */ - LeaveCriticalSection (& mutex->lock); - /* wait for a signal (broadcast or no) */ - - wait_result = WaitForMultipleObjects (2, cond->events, FALSE, end); - - switch(wait_result) { - case WAIT_TIMEOUT: - THROW3(timeout_error,GetLastError(),"condition %p (mutex %p) wasn't signaled before timeout (%f)",cond,mutex, delay); - case WAIT_FAILED: - THROW0(system_error,GetLastError(),"WaitForMultipleObjects failed, so we cannot wait on the condition"); - } - - /* we have a signal lock the condition */ - EnterCriticalSection (& cond->waiters_count_lock); - cond->waiters_count--; - - /* it's the last waiter or it's a broadcast ? */ - is_last_waiter = ((wait_result == WAIT_OBJECT_0 + BROADCAST - 1) && (cond->waiters_count == 0)); - - LeaveCriticalSection (& cond->waiters_count_lock); - - /* yes it's the last waiter or it's a broadcast - * only reset the manual event (the automatic event is reset in the WaitForMultipleObjects() function - * by the system. - */ - if (is_last_waiter) - if(!ResetEvent (cond->events[BROADCAST])) - THROW0(system_error,0,"ResetEvent failed"); - - /* relock the mutex associated with the condition in accordance with the posix thread specification */ - EnterCriticalSection (& mutex->lock); - } - /*THROW_UNIMPLEMENTED;*/ -} - -void xbt_os_cond_signal(xbt_os_cond_t cond) { - int have_waiters; - - EnterCriticalSection (& cond->waiters_count_lock); - have_waiters = cond->waiters_count > 0; - LeaveCriticalSection (& cond->waiters_count_lock); - - if (have_waiters) - if(!SetEvent(cond->events[SIGNAL])) - THROW0(system_error,0,"SetEvent failed"); - - xbt_os_thread_yield(); -} - -void xbt_os_cond_broadcast(xbt_os_cond_t cond){ - int have_waiters; - - EnterCriticalSection (& cond->waiters_count_lock); - have_waiters = cond->waiters_count > 0; - LeaveCriticalSection (& cond->waiters_count_lock); - - if (have_waiters) - SetEvent(cond->events[BROADCAST]); -} - -void xbt_os_cond_destroy(xbt_os_cond_t cond){ - int error = 0; - - if (!cond) return; - - if(!CloseHandle(cond->events[SIGNAL])) - error = 1; - - if(!CloseHandle(cond->events[BROADCAST])) - error = 1; - - DeleteCriticalSection(& cond->waiters_count_lock); - - xbt_free(cond); - - if (error) - THROW0(system_error,0,"Error while destroying the condition"); -} - -typedef struct xbt_os_sem_ { - HANDLE h; - unsigned int value; - CRITICAL_SECTION value_lock; /* protect access to value of the semaphore */ -}s_xbt_os_sem_t ; - -#ifndef INT_MAX -# define INT_MAX 32767 /* let's be safe by underestimating this value: this is for 16bits only */ -#endif - -xbt_os_sem_t -xbt_os_sem_init(unsigned int value) -{ - xbt_os_sem_t res; - - if(value > INT_MAX) - THROW1(arg_error,value,"Semaphore initial value too big: %ud cannot be stored as a signed int",value); - - res = (xbt_os_sem_t)xbt_new0(s_xbt_os_sem_t,1); - - if(!(res->h = CreateSemaphore(NULL,value,(long)INT_MAX,NULL))) { - THROW1(system_error,GetLastError(),"CreateSemaphore() failed: %s", - strerror(GetLastError())); - return NULL; - } - - res->value = value; - - InitializeCriticalSection(&(res->value_lock)); - - return res; -} - -void -xbt_os_sem_acquire(xbt_os_sem_t sem) -{ - if(!sem) - THROW0(arg_error,EINVAL,"Cannot acquire the NULL semaphore"); - - /* wait failure */ - if(WAIT_OBJECT_0 != WaitForSingleObject(sem->h,INFINITE)) - THROW1(system_error,GetLastError(),"WaitForSingleObject() failed: %s", - strerror(GetLastError())); - EnterCriticalSection(&(sem->value_lock)); - sem->value--; - LeaveCriticalSection(&(sem->value_lock)); -} +#include +#include -void xbt_os_sem_timedacquire(xbt_os_sem_t sem, double timeout) +xbt_os_mutex_t xbt_os_mutex_init(void) { - long seconds; - long milliseconds; - double end = timeout + xbt_os_time(); - - if(!sem) - THROW0(arg_error,EINVAL,"Cannot acquire the NULL semaphore"); - - if (timeout < 0) - { - xbt_os_sem_acquire(sem); - } - else /* timeout can be zero <-> try acquire ) */ - { - - seconds = (long) floor(end); - milliseconds = (long)( ( end - seconds) * 1000); - milliseconds += (seconds * 1000); - - switch(WaitForSingleObject(sem->h,milliseconds)) - { - case WAIT_OBJECT_0: - EnterCriticalSection(&(sem->value_lock)); - sem->value--; - LeaveCriticalSection(&(sem->value_lock)); - return; + pthread_mutexattr_t Attr; + pthread_mutexattr_init(&Attr); + pthread_mutexattr_settype(&Attr, PTHREAD_MUTEX_RECURSIVE); - case WAIT_TIMEOUT: - THROW2(timeout_error,GetLastError(),"semaphore %p wasn't signaled before timeout (%f)",sem,timeout); - return; + xbt_os_mutex_t res = xbt_new(s_xbt_os_mutex_t, 1); + int errcode = pthread_mutex_init(&(res->m), &Attr); + xbt_assert(errcode==0, "pthread_mutex_init() failed: %s", strerror(errcode)); - default: - THROW3(system_error,GetLastError(),"WaitForSingleObject(%p,%f) failed: %s",sem,timeout, strerror(GetLastError())); - } - } + return res; } -void -xbt_os_sem_release(xbt_os_sem_t sem) +void xbt_os_mutex_acquire(xbt_os_mutex_t mutex) { - if(!sem) - THROW0(arg_error,EINVAL,"Cannot release the NULL semaphore"); - - if(!ReleaseSemaphore(sem->h,1, NULL)) - THROW1(system_error,GetLastError(),"ReleaseSemaphore() failed: %s", - strerror(GetLastError())); - EnterCriticalSection (&(sem->value_lock)); - sem->value++; - LeaveCriticalSection(&(sem->value_lock)); + int errcode = pthread_mutex_lock(&(mutex->m)); + xbt_assert(errcode==0, "pthread_mutex_lock(%p) failed: %s", mutex, strerror(errcode)); } -void -xbt_os_sem_destroy(xbt_os_sem_t sem) +void xbt_os_mutex_release(xbt_os_mutex_t mutex) { - if(!sem) - THROW0(arg_error,EINVAL,"Cannot destroy the NULL semaphore"); - - if(!CloseHandle(sem->h)) - THROW1(system_error,GetLastError(),"CloseHandle() failed: %s", - strerror(GetLastError())); - - DeleteCriticalSection(&(sem->value_lock)); - - xbt_free(sem); - + int errcode = pthread_mutex_unlock(&(mutex->m)); + xbt_assert(errcode==0, "pthread_mutex_unlock(%p) failed: %s", mutex, strerror(errcode)); } -void -xbt_os_sem_get_value(xbt_os_sem_t sem, int* svalue) +void xbt_os_mutex_destroy(xbt_os_mutex_t mutex) { - if(!sem) - THROW0(arg_error,EINVAL,"Cannot get the value of the NULL semaphore"); + if (!mutex) + return; - EnterCriticalSection(&(sem->value_lock)); - *svalue = sem->value; - LeaveCriticalSection(&(sem->value_lock)); + int errcode = pthread_mutex_destroy(&(mutex->m)); + xbt_assert(errcode == 0, "pthread_mutex_destroy(%p) failed: %s", mutex, strerror(errcode)); + free(mutex); } - -#endif