mirror of
https://github.com/glfw/glfw.git
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Added TinyCThread to support directory.
This commit is contained in:
Camilla Berglund
parent
ab373308b0
commit
d0c7a7a2c4
588
support/tinycthread.c
Normal file
588
support/tinycthread.c
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@ -0,0 +1,588 @@
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/*
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Copyright (c) 2011 Marcus Geelnard
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*/
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/* Activate some POSIX functionality (e.g. recursive mutexes) */
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#define _GNU_SOURCE
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#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE < 500)
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#undef _XOPEN_SOURCE
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#define _XOPEN_SOURCE 500
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#endif
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#include "tinycthread.h"
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#include <stdlib.h>
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/* Platform specific includes */
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#if defined(_TTHREAD_POSIX_)
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#include <signal.h>
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#include <sched.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <errno.h>
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#elif defined(_TTHREAD_WIN32_)
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#include <process.h>
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#include <sys/timeb.h>
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#endif
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/* Standard, good-to-have defines */
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#ifndef NULL
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#define NULL (void*)0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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int mtx_init(mtx_t *mtx, int type)
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{
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#if defined(_TTHREAD_WIN32_)
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mtx->mAlreadyLocked = FALSE;
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mtx->mRecursive = type & mtx_recursive;
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InitializeCriticalSection(&mtx->mHandle);
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return thrd_success;
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#else
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int ret;
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pthread_mutexattr_t attr;
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pthread_mutexattr_init(&attr);
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if (type & mtx_recursive)
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{
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pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
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}
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ret = pthread_mutex_init(mtx, &attr);
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pthread_mutexattr_destroy(&attr);
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return ret == 0 ? thrd_success : thrd_error;
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#endif
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}
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void mtx_destroy(mtx_t *mtx)
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{
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#if defined(_TTHREAD_WIN32_)
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DeleteCriticalSection(&mtx->mHandle);
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#else
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pthread_mutex_destroy(mtx);
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#endif
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}
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int mtx_lock(mtx_t *mtx)
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{
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#if defined(_TTHREAD_WIN32_)
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EnterCriticalSection(&mtx->mHandle);
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if (!mtx->mRecursive)
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{
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while(mtx->mAlreadyLocked) Sleep(1000); /* Simulate deadlock... */
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mtx->mAlreadyLocked = TRUE;
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}
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return thrd_success;
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#else
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return pthread_mutex_lock(mtx) == 0 ? thrd_success : thrd_error;
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#endif
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}
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int mtx_timedlock(mtx_t *mtx, const xtime *xt)
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{
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/* FIXME! */
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return thrd_error;
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}
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int mtx_trylock(mtx_t *mtx)
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{
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#if defined(_TTHREAD_WIN32_)
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int ret = TryEnterCriticalSection(&mtx->mHandle) ? thrd_success : thrd_busy;
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if ((!mtx->mRecursive) && (ret == thrd_success) && mtx->mAlreadyLocked)
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{
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LeaveCriticalSection(&mtx->mHandle);
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ret = thrd_busy;
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}
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return ret;
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#else
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return (pthread_mutex_trylock(mtx) == 0) ? thrd_success : thrd_busy;
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#endif
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}
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int mtx_unlock(mtx_t *mtx)
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{
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#if defined(_TTHREAD_WIN32_)
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mtx->mAlreadyLocked = FALSE;
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LeaveCriticalSection(&mtx->mHandle);
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return thrd_success;
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#else
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return pthread_mutex_unlock(mtx) == 0 ? thrd_success : thrd_error;;
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#endif
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}
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#if defined(_TTHREAD_WIN32_)
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#define _CONDITION_EVENT_ONE 0
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#define _CONDITION_EVENT_ALL 1
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#endif
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int cnd_init(cnd_t *cond)
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{
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#if defined(_TTHREAD_WIN32_)
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cond->mWaitersCount = 0;
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/* Init critical section */
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InitializeCriticalSection(&cond->mWaitersCountLock);
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/* Init events */
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cond->mEvents[_CONDITION_EVENT_ONE] = CreateEvent(NULL, FALSE, FALSE, NULL);
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if (cond->mEvents[_CONDITION_EVENT_ONE] == NULL)
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{
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cond->mEvents[_CONDITION_EVENT_ALL] = NULL;
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return thrd_error;
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}
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cond->mEvents[_CONDITION_EVENT_ALL] = CreateEvent(NULL, TRUE, FALSE, NULL);
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if (cond->mEvents[_CONDITION_EVENT_ALL] == NULL)
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{
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CloseHandle(cond->mEvents[_CONDITION_EVENT_ONE]);
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cond->mEvents[_CONDITION_EVENT_ONE] = NULL;
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return thrd_error;
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}
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return thrd_success;
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#else
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return pthread_cond_init(cond, NULL) == 0 ? thrd_success : thrd_error;
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#endif
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}
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void cnd_destroy(cnd_t *cond)
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{
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#if defined(_TTHREAD_WIN32_)
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if (cond->mEvents[_CONDITION_EVENT_ONE] != NULL)
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{
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CloseHandle(cond->mEvents[_CONDITION_EVENT_ONE]);
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}
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if (cond->mEvents[_CONDITION_EVENT_ALL] != NULL)
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{
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CloseHandle(cond->mEvents[_CONDITION_EVENT_ALL]);
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}
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DeleteCriticalSection(&cond->mWaitersCountLock);
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#else
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pthread_cond_destroy(cond);
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#endif
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}
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int cnd_signal(cnd_t *cond)
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{
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#if defined(_TTHREAD_WIN32_)
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int haveWaiters;
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/* Are there any waiters? */
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EnterCriticalSection(&cond->mWaitersCountLock);
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haveWaiters = (cond->mWaitersCount > 0);
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LeaveCriticalSection(&cond->mWaitersCountLock);
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/* If we have any waiting threads, send them a signal */
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if(haveWaiters)
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{
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if (SetEvent(cond->mEvents[_CONDITION_EVENT_ONE]) == 0)
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{
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return thrd_error;
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}
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}
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return thrd_success;
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#else
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return pthread_cond_signal(cond) == 0 ? thrd_success : thrd_error;
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#endif
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}
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int cnd_broadcast(cnd_t *cond)
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{
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#if defined(_TTHREAD_WIN32_)
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int haveWaiters;
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/* Are there any waiters? */
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EnterCriticalSection(&cond->mWaitersCountLock);
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haveWaiters = (cond->mWaitersCount > 0);
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LeaveCriticalSection(&cond->mWaitersCountLock);
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/* If we have any waiting threads, send them a signal */
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if(haveWaiters)
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{
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if (SetEvent(cond->mEvents[_CONDITION_EVENT_ALL]) == 0)
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{
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return thrd_error;
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}
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}
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return thrd_success;
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#else
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return pthread_cond_signal(cond) == 0 ? thrd_success : thrd_error;
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#endif
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}
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#if defined(_TTHREAD_WIN32_)
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static int _cnd_timedwait_win32(cnd_t *cond, mtx_t *mtx, DWORD timeout)
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{
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int result, lastWaiter;
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/* Increment number of waiters */
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EnterCriticalSection(&cond->mWaitersCountLock);
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++ cond->mWaitersCount;
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LeaveCriticalSection(&cond->mWaitersCountLock);
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/* Release the mutex while waiting for the condition (will decrease
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the number of waiters when done)... */
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mtx_unlock(mtx);
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/* Wait for either event to become signaled due to cnd_signal() or
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cnd_broadcast() being called */
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result = WaitForMultipleObjects(2, cond->mEvents, FALSE, timeout);
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if (result == WAIT_TIMEOUT)
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{
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return thrd_timeout;
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}
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else if (result == (int)WAIT_FAILED)
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{
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return thrd_error;
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}
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/* Check if we are the last waiter */
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EnterCriticalSection(&cond->mWaitersCountLock);
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-- cond->mWaitersCount;
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lastWaiter = (result == (WAIT_OBJECT_0 + _CONDITION_EVENT_ALL)) &&
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(cond->mWaitersCount == 0);
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LeaveCriticalSection(&cond->mWaitersCountLock);
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/* If we are the last waiter to be notified to stop waiting, reset the event */
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if (lastWaiter)
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{
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if (ResetEvent(cond->mEvents[_CONDITION_EVENT_ALL]) == 0)
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{
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return thrd_error;
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}
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}
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/* Re-acquire the mutex */
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mtx_lock(mtx);
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return thrd_success;
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}
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#endif
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int cnd_wait(cnd_t *cond, mtx_t *mtx)
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{
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#if defined(_TTHREAD_WIN32_)
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return _cnd_timedwait_win32(cond, mtx, INFINITE);
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#else
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return pthread_cond_wait(cond, mtx) == 0 ? thrd_success : thrd_error;
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#endif
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}
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int cnd_timedwait(cnd_t *cond, mtx_t *mtx, const xtime *xt)
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{
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#if defined(_TTHREAD_WIN32_)
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xtime now;
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DWORD delta;
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xtime_get(&now, TIME_UTC);
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delta = (xt->sec - now.sec) * 1000 +
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(xt->nsec - now.nsec + 500000) / 1000000;
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return _cnd_timedwait_win32(cond, mtx, delta);
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#else
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struct timespec ts;
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int ret;
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ts.tv_sec = xt->sec;
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ts.tv_nsec = xt->nsec;
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ret = pthread_cond_timedwait(cond, mtx, &ts);
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if (ret == ETIMEDOUT)
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{
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return thrd_timeout;
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}
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return ret == 0 ? thrd_success : thrd_error;
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#endif
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}
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/** Information to pass to the new thread (what to run). */
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typedef struct {
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thrd_start_t mFunction; /**< Pointer to the function to be executed. */
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void * mArg; /**< Function argument for the thread function. */
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} _thread_start_info;
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/* Thread wrapper function. */
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#if defined(_TTHREAD_WIN32_)
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unsigned WINAPI _thrd_wrapper_function(void * aArg)
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#elif defined(_TTHREAD_POSIX_)
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void * _thrd_wrapper_function(void * aArg)
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#endif
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{
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thrd_start_t fun;
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void *arg;
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int res;
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#if defined(_TTHREAD_POSIX_)
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void *pres;
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#endif
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/* Get thread startup information */
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_thread_start_info *ti = (_thread_start_info *) aArg;
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fun = ti->mFunction;
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arg = ti->mArg;
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/* The thread is responsible for freeing the startup information */
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free((void *)ti);
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/* Call the actual client thread function */
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res = fun(arg);
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#if defined(_TTHREAD_WIN32_)
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return res;
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#else
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pres = malloc(sizeof(int));
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if (pres != NULL)
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{
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*(int*)pres = res;
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}
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return pres;
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#endif
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}
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int thrd_create(thrd_t *thr, thrd_start_t func, void *arg)
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{
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/* Fill out the thread startup information (passed to the thread wrapper,
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which will eventually free it) */
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_thread_start_info* ti = (_thread_start_info*)malloc(sizeof(_thread_start_info));
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if (ti == NULL)
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{
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return thrd_nomem;
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}
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ti->mFunction = func;
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ti->mArg = arg;
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/* Create the thread */
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#if defined(_TTHREAD_WIN32_)
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*thr = (HANDLE)_beginthreadex(NULL, 0, _thrd_wrapper_function, (void *)ti, 0, NULL);
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#elif defined(_TTHREAD_POSIX_)
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if(pthread_create(thr, NULL, _thrd_wrapper_function, (void *)ti) != 0)
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{
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*thr = 0;
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}
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#endif
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/* Did we fail to create the thread? */
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if(!*thr)
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{
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free(ti);
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return thrd_error;
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}
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return thrd_success;
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}
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thrd_t thrd_current(void)
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{
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#if defined(_TTHREAD_WIN32_)
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return GetCurrentThread();
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#else
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return pthread_self();
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#endif
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}
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int thrd_detach(thrd_t thr)
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{
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/* FIXME! */
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return thrd_error;
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}
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int thrd_equal(thrd_t thr0, thrd_t thr1)
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{
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#if defined(_TTHREAD_WIN32_)
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return thr0 == thr1;
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#else
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return pthread_equal(thr0, thr1);
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#endif
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}
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void thrd_exit(int res)
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{
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#if defined(_TTHREAD_WIN32_)
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ExitThread(res);
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#else
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void *pres = malloc(sizeof(int));
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if (pres != NULL)
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{
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*(int*)pres = res;
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}
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pthread_exit(pres);
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#endif
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}
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int thrd_join(thrd_t thr, int *res)
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{
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#if defined(_TTHREAD_WIN32_)
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if (WaitForSingleObject(thr, INFINITE) == WAIT_FAILED)
|
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{
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return thrd_error;
|
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}
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if (res != NULL)
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{
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DWORD dwRes;
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GetExitCodeThread(thr, &dwRes);
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*res = dwRes;
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}
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#elif defined(_TTHREAD_POSIX_)
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void *pres;
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int ires = 0;
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if (pthread_join(thr, &pres) != 0)
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{
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return thrd_error;
|
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}
|
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if (pres != NULL)
|
||||
{
|
||||
ires = *(int*)pres;
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free(pres);
|
||||
}
|
||||
if (res != NULL)
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{
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*res = ires;
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}
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#endif
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return thrd_success;
|
||||
}
|
||||
|
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void thrd_sleep(const xtime *xt)
|
||||
{
|
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xtime now;
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||||
#if defined(_TTHREAD_WIN32_)
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DWORD delta;
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#else
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long delta;
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#endif
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/* Get the current time */
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xtime_get(&now, TIME_UTC);
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||||
|
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#if defined(_TTHREAD_WIN32_)
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/* Delta in milliseconds */
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delta = (xt->sec - now.sec) * 1000 +
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||||
(xt->nsec - now.nsec + 500000) / 1000000;
|
||||
if (delta > 0)
|
||||
{
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||||
Sleep(delta);
|
||||
}
|
||||
#else
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/* Delta in microseconds */
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||||
delta = (xt->sec - now.sec) * 1000000L +
|
||||
(xt->nsec - now.nsec + 500L) / 1000L;
|
||||
|
||||
/* On some systems, the usleep argument must be < 1000000 */
|
||||
while (delta > 999999L)
|
||||
{
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||||
usleep(999999);
|
||||
delta -= 999999L;
|
||||
}
|
||||
if (delta > 0L)
|
||||
{
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||||
usleep((useconds_t)delta);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
void thrd_yield(void)
|
||||
{
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
Sleep(0);
|
||||
#else
|
||||
sched_yield();
|
||||
#endif
|
||||
}
|
||||
|
||||
int tss_create(tss_t *key, tss_dtor_t dtor)
|
||||
{
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
/* FIXME: The destructor function is not supported yet... */
|
||||
if (dtor != NULL)
|
||||
{
|
||||
return thrd_error;
|
||||
}
|
||||
*key = TlsAlloc();
|
||||
if (*key == TLS_OUT_OF_INDEXES)
|
||||
{
|
||||
return thrd_error;
|
||||
}
|
||||
#else
|
||||
if (pthread_key_create(key, dtor) != 0)
|
||||
{
|
||||
return thrd_error;
|
||||
}
|
||||
#endif
|
||||
return thrd_success;
|
||||
}
|
||||
|
||||
void tss_delete(tss_t key)
|
||||
{
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
TlsFree(key);
|
||||
#else
|
||||
pthread_key_delete(key);
|
||||
#endif
|
||||
}
|
||||
|
||||
void *tss_get(tss_t key)
|
||||
{
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
return TlsGetValue(key);
|
||||
#else
|
||||
return pthread_getspecific(key);
|
||||
#endif
|
||||
}
|
||||
|
||||
int tss_set(tss_t key, void *val)
|
||||
{
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
if (TlsSetValue(key, val) == 0)
|
||||
{
|
||||
return thrd_error;
|
||||
}
|
||||
#else
|
||||
if (pthread_setspecific(key, val) != 0)
|
||||
{
|
||||
return thrd_error;
|
||||
}
|
||||
#endif
|
||||
return thrd_success;
|
||||
}
|
||||
|
||||
int xtime_get(xtime *xt, int base)
|
||||
{
|
||||
if (base == TIME_UTC)
|
||||
{
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
struct _timeb tb;
|
||||
_ftime(&tb);
|
||||
xt->sec = (time_t)tb.time;
|
||||
xt->nsec = 1000000 * (long)tb.millitm;
|
||||
#else
|
||||
struct timeval tv;
|
||||
gettimeofday(&tv, NULL);
|
||||
xt->sec = (time_t)tv.tv_sec;
|
||||
xt->nsec = 1000 * (long)tv.tv_usec;
|
||||
#endif
|
||||
return base;
|
||||
}
|
||||
else
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
404
support/tinycthread.h
Normal file
404
support/tinycthread.h
Normal file
@ -0,0 +1,404 @@
|
||||
/*
|
||||
Copyright (c) 2011 Marcus Geelnard
|
||||
|
||||
This software is provided 'as-is', without any express or implied
|
||||
warranty. In no event will the authors be held liable for any damages
|
||||
arising from the use of this software.
|
||||
|
||||
Permission is granted to anyone to use this software for any purpose,
|
||||
including commercial applications, and to alter it and redistribute it
|
||||
freely, subject to the following restrictions:
|
||||
|
||||
1. The origin of this software must not be misrepresented; you must not
|
||||
claim that you wrote the original software. If you use this software
|
||||
in a product, an acknowledgment in the product documentation would be
|
||||
appreciated but is not required.
|
||||
|
||||
2. Altered source versions must be plainly marked as such, and must not be
|
||||
misrepresented as being the original software.
|
||||
|
||||
3. This notice may not be removed or altered from any source
|
||||
distribution.
|
||||
*/
|
||||
|
||||
#ifndef _TINYCTHREAD_H_
|
||||
#define _TINYCTHREAD_H_
|
||||
|
||||
/**
|
||||
* @file
|
||||
* @mainpage TinyCThread API Reference
|
||||
*
|
||||
* @section intro_sec Introduction
|
||||
* TinyCThread is a minimal, portable implementation of basic threading
|
||||
* classes for C.
|
||||
*
|
||||
* They closely mimic the functionality and naming of the C1X standard, and
|
||||
* should be easily replaceable with the corresponding standard variants.
|
||||
*
|
||||
* @section port_sec Portability
|
||||
* The Win32 variant uses the native Win32 API for implementing the thread
|
||||
* classes, while for other systems, the POSIX threads API (pthread) is used.
|
||||
*
|
||||
* @section misc_sec Miscellaneous
|
||||
* The following special keywords are available: #_Thread_local.
|
||||
*
|
||||
* For more detailed information, browse the different sections of this
|
||||
* documentation. A good place to start is:
|
||||
* tinycthread.h.
|
||||
*/
|
||||
|
||||
/* Which platform are we on? */
|
||||
#if !defined(_TTHREAD_PLATFORM_DEFINED_)
|
||||
#if defined(_WIN32) || defined(__WIN32__) || defined(__WINDOWS__)
|
||||
#define _TTHREAD_WIN32_
|
||||
#else
|
||||
#define _TTHREAD_POSIX_
|
||||
#endif
|
||||
#define _TTHREAD_PLATFORM_DEFINED_
|
||||
#endif
|
||||
|
||||
/* Generic includes */
|
||||
#include <time.h>
|
||||
|
||||
/* Platform specific includes */
|
||||
#if defined(_TTHREAD_POSIX_)
|
||||
#include <pthread.h>
|
||||
#elif defined(_TTHREAD_WIN32_)
|
||||
#ifndef WIN32_LEAN_AND_MEAN
|
||||
#define WIN32_LEAN_AND_MEAN
|
||||
#define __UNDEF_LEAN_AND_MEAN
|
||||
#endif
|
||||
#include <windows.h>
|
||||
#ifdef __UNDEF_LEAN_AND_MEAN
|
||||
#undef WIN32_LEAN_AND_MEAN
|
||||
#undef __UNDEF_LEAN_AND_MEAN
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/** TinyCThread version (major number). */
|
||||
#define TINYCTHREAD_VERSION_MAJOR 1
|
||||
/** TinyCThread version (minor number). */
|
||||
#define TINYCTHREAD_VERSION_MINOR 0
|
||||
/** TinyCThread version (full version). */
|
||||
#define TINYCTHREAD_VERSION (TINYCTHREAD_VERSION_MAJOR * 100 + TINYCTHREAD_VERSION_MINOR)
|
||||
|
||||
/**
|
||||
* @def _Thread_local
|
||||
* Thread local storage keyword.
|
||||
* A variable that is declared with the @c _Thread_local keyword makes the
|
||||
* value of the variable local to each thread (known as thread-local storage,
|
||||
* or TLS). Example usage:
|
||||
* @code
|
||||
* // This variable is local to each thread.
|
||||
* _Thread_local int variable;
|
||||
* @endcode
|
||||
* @note The @c _Thread_local keyword is a macro that maps to the corresponding
|
||||
* compiler directive (e.g. @c __declspec(thread)).
|
||||
* @note This directive is currently not supported on Mac OS X (it will give
|
||||
* a compiler error), since compile-time TLS is not supported in the Mac OS X
|
||||
* executable format. Also, some older versions of MinGW (before GCC 4.x) do
|
||||
* not support this directive.
|
||||
* @hideinitializer
|
||||
*/
|
||||
|
||||
/* FIXME: Check for a PROPER value of __STDC_VERSION__ to know if we have C1X or
|
||||
not (the spec is still draft)... */
|
||||
#if !(defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201102L)) && !defined(_Thread_local)
|
||||
#if defined(__GNUC__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_CC) || defined(__IBMCPP__)
|
||||
#define _Thread_local __thread
|
||||
#else
|
||||
#define _Thread_local __declspec(thread)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* Macros */
|
||||
#define TSS_DTOR_ITERATIONS 0
|
||||
|
||||
/* Function return values */
|
||||
#define thrd_error 0 /**< The requested operation failed */
|
||||
#define thrd_success 1 /**< The requested operation succeeded */
|
||||
#define thrd_timeout 2 /**< The time specified in the call was reached without acquiring the requested resource */
|
||||
#define thrd_busy 3 /**< The requested operation failed because a tesource requested by a test and return function is already in use */
|
||||
#define thrd_nomem 4 /**< The requested operation failed because it was unable to allocate memory */
|
||||
|
||||
/* Mutex types */
|
||||
#define mtx_plain 1
|
||||
#define mtx_timed 2
|
||||
#define mtx_try 4
|
||||
#define mtx_recursive 8
|
||||
|
||||
/** Time specification */
|
||||
typedef struct {
|
||||
time_t sec; /**< Seconds */
|
||||
long nsec; /**< Nanoseconds */
|
||||
} xtime;
|
||||
|
||||
/* Mutex */
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
typedef struct {
|
||||
CRITICAL_SECTION mHandle; /* Critical section handle */
|
||||
int mAlreadyLocked; /* TRUE if the mutex is already locked */
|
||||
int mRecursive; /* TRUE if the mutex is recursive */
|
||||
} mtx_t;
|
||||
#else
|
||||
typedef pthread_mutex_t mtx_t;
|
||||
#endif
|
||||
|
||||
/** Create a mutex object.
|
||||
* @param mtx A mutex object.
|
||||
* @param type Bit-mask that must have one of the following six values:
|
||||
* @li @c mtx_plain for a simple non-recursive mutex
|
||||
* @li @c mtx_timed for a non-recursive mutex that supports timeout
|
||||
* @li @c mtx_try for a non-recursive mutex that supports test and return
|
||||
* @li @c mtx_plain | @c mtx_recursive (same as @c mtx_plain, but recursive)
|
||||
* @li @c mtx_timed | @c mtx_recursive (same as @c mtx_timed, but recursive)
|
||||
* @li @c mtx_try | @c mtx_recursive (same as @c mtx_try, but recursive)
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
*/
|
||||
int mtx_init(mtx_t *mtx, int type);
|
||||
|
||||
/** Release any resources used by the given mutex.
|
||||
* @param mtx A mutex object.
|
||||
*/
|
||||
void mtx_destroy(mtx_t *mtx);
|
||||
|
||||
/** Lock the given mutex.
|
||||
* Blocks until the given mutex can be locked. If the mutex is non-recursive, and
|
||||
* the calling thread already has a lock on the mutex, this call will block
|
||||
* forever.
|
||||
* @param mtx A mutex object.
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
*/
|
||||
int mtx_lock(mtx_t *mtx);
|
||||
|
||||
/** NOT YET IMPLEMENTED.
|
||||
*/
|
||||
int mtx_timedlock(mtx_t *mtx, const xtime *xt);
|
||||
|
||||
/** Try to lock the given mutex.
|
||||
* The specified mutex shall support either test and return or timeout. If the
|
||||
* mutex is already locked, the function returns without blocking.
|
||||
* @param mtx A mutex object.
|
||||
* @return @ref thrd_success on success, or @ref thrd_busy if the resource
|
||||
* requested is already in use, or @ref thrd_error if the request could not be
|
||||
* honored.
|
||||
*/
|
||||
int mtx_trylock(mtx_t *mtx);
|
||||
|
||||
/** Unlock the given mutex.
|
||||
* @param mtx A mutex object.
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
*/
|
||||
int mtx_unlock(mtx_t *mtx);
|
||||
|
||||
/* Condition variable */
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
typedef struct {
|
||||
HANDLE mEvents[2]; /* Signal and broadcast event HANDLEs. */
|
||||
unsigned int mWaitersCount; /* Count of the number of waiters. */
|
||||
CRITICAL_SECTION mWaitersCountLock; /* Serialize access to mWaitersCount. */
|
||||
} cnd_t;
|
||||
#else
|
||||
typedef pthread_cond_t cnd_t;
|
||||
#endif
|
||||
|
||||
/** Create a condition variable object.
|
||||
* @param cond A condition variable object.
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
*/
|
||||
int cnd_init(cnd_t *cond);
|
||||
|
||||
/** Release any resources used by the given condition variable.
|
||||
* @param cond A condition variable object.
|
||||
*/
|
||||
void cnd_destroy(cnd_t *cond);
|
||||
|
||||
/** Signal a condition variable.
|
||||
* Unblocks one of the threads that are blocked on the given condition variable
|
||||
* at the time of the call. If no threads are blocked on the condition variable
|
||||
* at the time of the call, the function does nothing and return success.
|
||||
* @param cond A condition variable object.
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
*/
|
||||
int cnd_signal(cnd_t *cond);
|
||||
|
||||
/** Broadcast a condition variable.
|
||||
* Unblocks all of the threads that are blocked on the given condition variable
|
||||
* at the time of the call. If no threads are blocked on the condition variable
|
||||
* at the time of the call, the function does nothing and return success.
|
||||
* @param cond A condition variable object.
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
*/
|
||||
int cnd_broadcast(cnd_t *cond);
|
||||
|
||||
/** Wait for a condition variable to become signaled.
|
||||
* The function atomically unlocks the given mutex and endeavors to block until
|
||||
* the given condition variable is signaled by a call to cnd_signal or to
|
||||
* cnd_broadcast. When the calling thread becomes unblocked it locks the mutex
|
||||
* before it returns.
|
||||
* @param cond A condition variable object.
|
||||
* @param mtx A mutex object.
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
*/
|
||||
int cnd_wait(cnd_t *cond, mtx_t *mtx);
|
||||
|
||||
/** Wait for a condition variable to become signaled.
|
||||
* The function atomically unlocks the given mutex and endeavors to block until
|
||||
* the given condition variable is signaled by a call to cnd_signal or to
|
||||
* cnd_broadcast, or until after the specified time. When the calling thread
|
||||
* becomes unblocked it locks the mutex before it returns.
|
||||
* @param cond A condition variable object.
|
||||
* @param mtx A mutex object.
|
||||
* @param xt A point in time at which the request will time out (absolute time).
|
||||
* @return @ref thrd_success upon success, or @ref thrd_timeout if the time
|
||||
* specified in the call was reached without acquiring the requested resource, or
|
||||
* @ref thrd_error if the request could not be honored.
|
||||
*/
|
||||
int cnd_timedwait(cnd_t *cond, mtx_t *mtx, const xtime *xt);
|
||||
|
||||
/* Thread */
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
typedef HANDLE thrd_t;
|
||||
#else
|
||||
typedef pthread_t thrd_t;
|
||||
#endif
|
||||
|
||||
/** Thread start function.
|
||||
* Any thread that is started with the @ref thrd_create() function must be
|
||||
* started through a function of this type.
|
||||
* @param arg The thread argument (the @c arg argument of the corresponding
|
||||
* @ref thrd_create() call).
|
||||
* @return The thread return value, which can be obtained by another thread
|
||||
* by using the @ref thrd_join() function.
|
||||
*/
|
||||
typedef int (*thrd_start_t)(void *arg);
|
||||
|
||||
/** Create a new thread.
|
||||
* @param thr Identifier of the newly created thread.
|
||||
* @param func A function pointer to the function that will be executed in
|
||||
* the new thread.
|
||||
* @param arg An argument to the thread function.
|
||||
* @return @ref thrd_success on success, or @ref thrd_nomem if no memory could
|
||||
* be allocated for the thread requested, or @ref thrd_error if the request
|
||||
* could not be honored.
|
||||
* @note A thread’s identifier may be reused for a different thread once the
|
||||
* original thread has exited and either been detached or joined to another
|
||||
* thread.
|
||||
*/
|
||||
int thrd_create(thrd_t *thr, thrd_start_t func, void *arg);
|
||||
|
||||
/** Identify the calling thread.
|
||||
* @return The identifier of the calling thread.
|
||||
*/
|
||||
thrd_t thrd_current(void);
|
||||
|
||||
/** NOT YET IMPLEMENTED.
|
||||
*/
|
||||
int thrd_detach(thrd_t thr);
|
||||
|
||||
/** Compare two thread identifiers.
|
||||
* The function determines if two thread identifiers refer to the same thread.
|
||||
* @return Zero if the two thread identifiers refer to different threads.
|
||||
* Otherwise a nonzero value is returned.
|
||||
*/
|
||||
int thrd_equal(thrd_t thr0, thrd_t thr1);
|
||||
|
||||
/** Terminate execution of the calling thread.
|
||||
* @param res Result code of the calling thread.
|
||||
*/
|
||||
void thrd_exit(int res);
|
||||
|
||||
/** Wait for a thread to terminate.
|
||||
* The function joins the given thread with the current thread by blocking
|
||||
* until the other thread has terminated.
|
||||
* @param thr The thread to join with.
|
||||
* @param res If this pointer is not NULL, the function will store the result
|
||||
* code of the given thread in the integer pointed to by @c res.
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
*/
|
||||
int thrd_join(thrd_t thr, int *res);
|
||||
|
||||
/** Put the calling thread to sleep.
|
||||
* Suspend execution of the calling thread until after the time specified by the
|
||||
* xtime object.
|
||||
* @param xt A point in time at which the thread will resume (absolute time).
|
||||
*/
|
||||
void thrd_sleep(const xtime *xt);
|
||||
|
||||
/** Yield execution to another thread.
|
||||
* Permit other threads to run, even if the current thread would ordinarily
|
||||
* continue to run.
|
||||
*/
|
||||
void thrd_yield(void);
|
||||
|
||||
/* Thread local storage */
|
||||
#if defined(_TTHREAD_WIN32_)
|
||||
typedef DWORD tss_t;
|
||||
#else
|
||||
typedef pthread_key_t tss_t;
|
||||
#endif
|
||||
|
||||
/** Destructor function for a thread-specific storage.
|
||||
* @param val The value of the destructed thread-specific storage.
|
||||
*/
|
||||
typedef void (*tss_dtor_t)(void *val);
|
||||
|
||||
/** Create a thread-specific storage.
|
||||
* @param key The unique key identifier that will be set if the function is
|
||||
* successful.
|
||||
* @param dtor Destructor function. This can be NULL.
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
* @note The destructor function is not supported under Windows. If @c dtor is
|
||||
* not NULL when calling this function under Windows, the function will fail
|
||||
* and return @ref thrd_error.
|
||||
*/
|
||||
int tss_create(tss_t *key, tss_dtor_t dtor);
|
||||
|
||||
/** Delete a thread-specific storage.
|
||||
* The function releases any resources used by the given thread-specific
|
||||
* storage.
|
||||
* @param key The key that shall be deleted.
|
||||
*/
|
||||
void tss_delete(tss_t key);
|
||||
|
||||
/** Get the value for a thread-specific storage.
|
||||
* @param key The thread-specific storage identifier.
|
||||
* @return The value for the current thread held in the given thread-specific
|
||||
* storage.
|
||||
*/
|
||||
void *tss_get(tss_t key);
|
||||
|
||||
/** Set the value for a thread-specific storage.
|
||||
* @param key The thread-specific storage identifier.
|
||||
* @param val The value of the thread-specific storage to set for the current
|
||||
* thread.
|
||||
* @return @ref thrd_success on success, or @ref thrd_error if the request could
|
||||
* not be honored.
|
||||
*/
|
||||
int tss_set(tss_t key, void *val);
|
||||
|
||||
/* Timing */
|
||||
enum
|
||||
{
|
||||
TIME_UTC = 1
|
||||
};
|
||||
|
||||
/** Get the current time.
|
||||
* Set the xtime object to hold the current time based on the given time base.
|
||||
* @param xt Will be filled out with the current time.
|
||||
* @param base Time base (must be @c TIME_UTC).
|
||||
* @return The non-zero value @c base if the function is successful, otherwise
|
||||
* it returns zero.
|
||||
*/
|
||||
int xtime_get(xtime *xt, int base);
|
||||
|
||||
#endif /* _TINYTHREAD_H_ */
|
||||
Loading…
Reference in New Issue
Block a user