X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/4b9fef86b73d5262c31dab7e82aaed3f2d62e660..7516e3d43bd243928406a631bc5c9e89b2789f04:/src/xbt/xbt_thread.c?ds=sidebyside diff --git a/src/xbt/xbt_thread.c b/src/xbt/xbt_thread.c deleted file mode 100644 index 0aef1c1549..0000000000 --- a/src/xbt/xbt_thread.c +++ /dev/null @@ -1,436 +0,0 @@ -/* $Id$ */ - -/* xbt_thread -- portability layer over the pthread API */ - -/* Copyright 2006,2007 Malek Cherier, Martin Quinson - * All right 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 "portable.h" -#include "xbt/xbt_thread.h" /* This module */ -#include "xbt_modinter.h" /* Initialization/finalization of this module */ - - - -/* ********************************* PTHREAD IMPLEMENTATION ************************************ */ -#ifdef HAVE_PTHREAD_H -#include - -typedef struct xbt_thread_ { - pthread_t t; - void *param; - pvoid_f_pvoid_t *start_routine; -} s_xbt_thread_t ; - -/* thread-specific data containing the xbt_thread_t structure */ -static pthread_key_t xbt_self_thread_key; - -/* frees the xbt_thread_t corresponding to the current thread */ -static void xbt_thread_free_thread_data(void*d){ - free(d); -} - -void xbt_thread_mod_init(void) { - int errcode; - - if ((errcode=pthread_key_create(&xbt_self_thread_key, NULL))) - THROW0(system_error,errcode,"pthread_key_create failed for xbt_self_thread_key"); -} -void xbt_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"); -} - -static void * wrapper_start_routine(void *s) { - xbt_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_thread_t xbt_thread_create(pvoid_f_pvoid_t start_routine, - void* param) { - int errcode; - - xbt_thread_t res_thread=xbt_new(s_xbt_thread_t,1); - res_thread->start_routine = start_routine; - res_thread->param = param; - - - 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; -} - -void -xbt_thread_join(xbt_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)); - free(thread); -} - -void xbt_thread_exit(int *retval) { - pthread_exit(retval); -} - -xbt_thread_t xbt_thread_self(void) { - return pthread_getspecific(xbt_self_thread_key); -} - -#include -void xbt_thread_yield(void) { - sched_yield(); -} -/****** mutex related functions ******/ -typedef struct xbt_mutex_ { - pthread_mutex_t m; -} s_xbt_mutex_t; - -xbt_mutex_t xbt_mutex_init(void) { - xbt_mutex_t res = xbt_new(s_xbt_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_mutex_lock(xbt_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_mutex_unlock(xbt_mutex_t mutex) { - int errcode; - - if ((errcode=pthread_mutex_unlock(&(mutex->m)))) - THROW2(system_error,errcode,"pthread_mutex_unlock(%p) failed: %s", - mutex, strerror(errcode)); -} - -void xbt_mutex_destroy(xbt_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_thcond_ { - pthread_cond_t c; -} s_xbt_thcond_t; - -xbt_thcond_t xbt_thcond_init(void) { - xbt_thcond_t res = xbt_new(s_xbt_thcond_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_thcond_wait(xbt_thcond_t cond, xbt_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_thcond_signal(xbt_thcond_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_thcond_broadcast(xbt_thcond_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_thcond_destroy(xbt_thcond_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); -} - -/* ********************************* WINDOWS IMPLEMENTATION ************************************ */ - -#elif defined(WIN32) - -typedef struct xbt_thread_ { - HANDLE handle; /* the win thread handle */ - unsigned long id; /* the win thread id */ - pvoid_f_pvoid_t *start_routine; - void* param; -} s_xbt_thread_t ; - -/* key to the TLS containing the xbt_thread_t structure */ -static unsigned long xbt_self_thread_key; - -void xbt_thread_mod_init(void) { - xbt_self_thread_key = TlsAlloc(); -} -void xbt_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_thread_t t = (xbt_thread_t)s; - - if(!TlsSetValue(xbt_self_thread_key,t)) - THROW0(system_error,(int)GetLastError(),"TlsSetValue of data describing the created thread failed"); - - return (DWORD)t->start_routine(t->param); -} - - -xbt_thread_t xbt_thread_create(pvoid_f_pvoid_t start_routine, - void* param) { - - xbt_thread_t t = xbt_new(s_xbt_thread_t,1); - - t->start_routine = start_routine ; - t->param = param; - - t->handle = CreateThread(NULL,0, - (LPTHREAD_START_ROUTINE)wrapper_start_routine, - t,0,&(t->id)); - - if(!t->handle) { - xbt_free(t); - THROW0(system_error,(int)GetLastError(),"CreateThread failed"); - } - - return t; -} - -void -xbt_thread_join(xbt_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); - free(thread); -} - -void xbt_thread_exit(int *retval) { - if(retval) - ExitThread(*retval); - else - ExitThread(0); -} - -xbt_thread_t xbt_thread_self(void) { - return TlsGetValue(xbt_self_thread_key); -} - -void xbt_thread_yield(void) { - Sleep(0); -} - -/****** mutex related functions ******/ -typedef struct xbt_mutex_ { - CRITICAL_SECTION lock; -} s_xbt_mutex_t; - -xbt_mutex_t xbt_mutex_init(void) { - xbt_mutex_t res = xbt_new(s_xbt_mutex_t,1); - - /* initialize the critical section object */ - InitializeCriticalSection(&(res->lock)); - - return res; -} - -void xbt_mutex_lock(xbt_mutex_t mutex) { - - EnterCriticalSection(& mutex->lock); -} - -void xbt_mutex_unlock(xbt_mutex_t mutex) { - - LeaveCriticalSection (& mutex->lock); - -} - -void xbt_mutex_destroy(xbt_mutex_t mutex) { - - if (!mutex) return; - - DeleteCriticalSection(& mutex->lock); - free(mutex); -} - -/***** condition related functions *****/ - enum { - SIGNAL = 0, - BROADCAST = 1, - MAX_EVENTS = 2 - }; - -typedef struct xbt_thcond_ { - HANDLE events[MAX_EVENTS]; - - unsigned int waiters_count; /* the number of waiters */ - CRITICAL_SECTION waiters_count_lock; /* protect access to waiters_count */ -} s_xbt_thcond_t; - -xbt_thcond_t xbt_thcond_init(void) { - - xbt_thcond_t res = xbt_new0(s_xbt_thcond_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_thcond_wait(xbt_thcond_t cond, xbt_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_thcond_signal(xbt_thcond_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_thread_yield(); -} - -void xbt_thcond_broadcast(xbt_thcond_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_thcond_destroy(xbt_thcond_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"); -} - -#endif