| /* -*- mode: c; tab-width: 2; indent-tabs-mode: nil; -*- |
| Copyright (c) 2012 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. |
| */ |
| |
| /* 2013-01-06 Camilla Berglund <elmindreda@glfw.org> |
| * |
| * Added casts from time_t to DWORD to avoid warnings on VC++. |
| * Fixed time retrieval on POSIX systems. |
| */ |
| |
| #include "tinycthread.h" |
| #include <stdlib.h> |
| |
| /* Platform specific includes */ |
| #if defined(_TTHREAD_POSIX_) |
| #include <signal.h> |
| #include <sched.h> |
| #include <unistd.h> |
| #include <sys/time.h> |
| #include <errno.h> |
| #elif defined(_TTHREAD_WIN32_) |
| #include <process.h> |
| #include <sys/timeb.h> |
| #endif |
| |
| /* Standard, good-to-have defines */ |
| #ifndef NULL |
| #define NULL (void*)0 |
| #endif |
| #ifndef TRUE |
| #define TRUE 1 |
| #endif |
| #ifndef FALSE |
| #define FALSE 0 |
| #endif |
| |
| int mtx_init(mtx_t *mtx, int type) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| mtx->mAlreadyLocked = FALSE; |
| mtx->mRecursive = type & mtx_recursive; |
| InitializeCriticalSection(&mtx->mHandle); |
| return thrd_success; |
| #else |
| int ret; |
| pthread_mutexattr_t attr; |
| pthread_mutexattr_init(&attr); |
| if (type & mtx_recursive) |
| { |
| pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); |
| } |
| ret = pthread_mutex_init(mtx, &attr); |
| pthread_mutexattr_destroy(&attr); |
| return ret == 0 ? thrd_success : thrd_error; |
| #endif |
| } |
| |
| void mtx_destroy(mtx_t *mtx) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| DeleteCriticalSection(&mtx->mHandle); |
| #else |
| pthread_mutex_destroy(mtx); |
| #endif |
| } |
| |
| int mtx_lock(mtx_t *mtx) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| EnterCriticalSection(&mtx->mHandle); |
| if (!mtx->mRecursive) |
| { |
| while(mtx->mAlreadyLocked) Sleep(1000); /* Simulate deadlock... */ |
| mtx->mAlreadyLocked = TRUE; |
| } |
| return thrd_success; |
| #else |
| return pthread_mutex_lock(mtx) == 0 ? thrd_success : thrd_error; |
| #endif |
| } |
| |
| int mtx_timedlock(mtx_t *mtx, const struct timespec *ts) |
| { |
| /* FIXME! */ |
| (void)mtx; |
| (void)ts; |
| return thrd_error; |
| } |
| |
| int mtx_trylock(mtx_t *mtx) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| int ret = TryEnterCriticalSection(&mtx->mHandle) ? thrd_success : thrd_busy; |
| if ((!mtx->mRecursive) && (ret == thrd_success) && mtx->mAlreadyLocked) |
| { |
| LeaveCriticalSection(&mtx->mHandle); |
| ret = thrd_busy; |
| } |
| return ret; |
| #else |
| return (pthread_mutex_trylock(mtx) == 0) ? thrd_success : thrd_busy; |
| #endif |
| } |
| |
| int mtx_unlock(mtx_t *mtx) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| mtx->mAlreadyLocked = FALSE; |
| LeaveCriticalSection(&mtx->mHandle); |
| return thrd_success; |
| #else |
| return pthread_mutex_unlock(mtx) == 0 ? thrd_success : thrd_error;; |
| #endif |
| } |
| |
| #if defined(_TTHREAD_WIN32_) |
| #define _CONDITION_EVENT_ONE 0 |
| #define _CONDITION_EVENT_ALL 1 |
| #endif |
| |
| int cnd_init(cnd_t *cond) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| cond->mWaitersCount = 0; |
| |
| /* Init critical section */ |
| InitializeCriticalSection(&cond->mWaitersCountLock); |
| |
| /* Init events */ |
| cond->mEvents[_CONDITION_EVENT_ONE] = CreateEvent(NULL, FALSE, FALSE, NULL); |
| if (cond->mEvents[_CONDITION_EVENT_ONE] == NULL) |
| { |
| cond->mEvents[_CONDITION_EVENT_ALL] = NULL; |
| return thrd_error; |
| } |
| cond->mEvents[_CONDITION_EVENT_ALL] = CreateEvent(NULL, TRUE, FALSE, NULL); |
| if (cond->mEvents[_CONDITION_EVENT_ALL] == NULL) |
| { |
| CloseHandle(cond->mEvents[_CONDITION_EVENT_ONE]); |
| cond->mEvents[_CONDITION_EVENT_ONE] = NULL; |
| return thrd_error; |
| } |
| |
| return thrd_success; |
| #else |
| return pthread_cond_init(cond, NULL) == 0 ? thrd_success : thrd_error; |
| #endif |
| } |
| |
| void cnd_destroy(cnd_t *cond) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| if (cond->mEvents[_CONDITION_EVENT_ONE] != NULL) |
| { |
| CloseHandle(cond->mEvents[_CONDITION_EVENT_ONE]); |
| } |
| if (cond->mEvents[_CONDITION_EVENT_ALL] != NULL) |
| { |
| CloseHandle(cond->mEvents[_CONDITION_EVENT_ALL]); |
| } |
| DeleteCriticalSection(&cond->mWaitersCountLock); |
| #else |
| pthread_cond_destroy(cond); |
| #endif |
| } |
| |
| int cnd_signal(cnd_t *cond) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| int haveWaiters; |
| |
| /* Are there any waiters? */ |
| EnterCriticalSection(&cond->mWaitersCountLock); |
| haveWaiters = (cond->mWaitersCount > 0); |
| LeaveCriticalSection(&cond->mWaitersCountLock); |
| |
| /* If we have any waiting threads, send them a signal */ |
| if(haveWaiters) |
| { |
| if (SetEvent(cond->mEvents[_CONDITION_EVENT_ONE]) == 0) |
| { |
| return thrd_error; |
| } |
| } |
| |
| return thrd_success; |
| #else |
| return pthread_cond_signal(cond) == 0 ? thrd_success : thrd_error; |
| #endif |
| } |
| |
| int cnd_broadcast(cnd_t *cond) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| int haveWaiters; |
| |
| /* Are there any waiters? */ |
| EnterCriticalSection(&cond->mWaitersCountLock); |
| haveWaiters = (cond->mWaitersCount > 0); |
| LeaveCriticalSection(&cond->mWaitersCountLock); |
| |
| /* If we have any waiting threads, send them a signal */ |
| if(haveWaiters) |
| { |
| if (SetEvent(cond->mEvents[_CONDITION_EVENT_ALL]) == 0) |
| { |
| return thrd_error; |
| } |
| } |
| |
| return thrd_success; |
| #else |
| return pthread_cond_signal(cond) == 0 ? thrd_success : thrd_error; |
| #endif |
| } |
| |
| #if defined(_TTHREAD_WIN32_) |
| static int _cnd_timedwait_win32(cnd_t *cond, mtx_t *mtx, DWORD timeout) |
| { |
| int result, lastWaiter; |
| |
| /* Increment number of waiters */ |
| EnterCriticalSection(&cond->mWaitersCountLock); |
| ++ cond->mWaitersCount; |
| LeaveCriticalSection(&cond->mWaitersCountLock); |
| |
| /* Release the mutex while waiting for the condition (will decrease |
| the number of waiters when done)... */ |
| mtx_unlock(mtx); |
| |
| /* Wait for either event to become signaled due to cnd_signal() or |
| cnd_broadcast() being called */ |
| result = WaitForMultipleObjects(2, cond->mEvents, FALSE, timeout); |
| if (result == WAIT_TIMEOUT) |
| { |
| return thrd_timeout; |
| } |
| else if (result == (int)WAIT_FAILED) |
| { |
| return thrd_error; |
| } |
| |
| /* Check if we are the last waiter */ |
| EnterCriticalSection(&cond->mWaitersCountLock); |
| -- cond->mWaitersCount; |
| lastWaiter = (result == (WAIT_OBJECT_0 + _CONDITION_EVENT_ALL)) && |
| (cond->mWaitersCount == 0); |
| LeaveCriticalSection(&cond->mWaitersCountLock); |
| |
| /* If we are the last waiter to be notified to stop waiting, reset the event */ |
| if (lastWaiter) |
| { |
| if (ResetEvent(cond->mEvents[_CONDITION_EVENT_ALL]) == 0) |
| { |
| return thrd_error; |
| } |
| } |
| |
| /* Re-acquire the mutex */ |
| mtx_lock(mtx); |
| |
| return thrd_success; |
| } |
| #endif |
| |
| int cnd_wait(cnd_t *cond, mtx_t *mtx) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| return _cnd_timedwait_win32(cond, mtx, INFINITE); |
| #else |
| return pthread_cond_wait(cond, mtx) == 0 ? thrd_success : thrd_error; |
| #endif |
| } |
| |
| int cnd_timedwait(cnd_t *cond, mtx_t *mtx, const struct timespec *ts) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| struct timespec now; |
| if (clock_gettime(CLOCK_REALTIME, &now) == 0) |
| { |
| DWORD delta = (DWORD) ((ts->tv_sec - now.tv_sec) * 1000 + |
| (ts->tv_nsec - now.tv_nsec + 500000) / 1000000); |
| return _cnd_timedwait_win32(cond, mtx, delta); |
| } |
| else |
| return thrd_error; |
| #else |
| int ret; |
| ret = pthread_cond_timedwait(cond, mtx, ts); |
| if (ret == ETIMEDOUT) |
| { |
| return thrd_timeout; |
| } |
| return ret == 0 ? thrd_success : thrd_error; |
| #endif |
| } |
| |
| |
| /** Information to pass to the new thread (what to run). */ |
| typedef struct { |
| thrd_start_t mFunction; /**< Pointer to the function to be executed. */ |
| void * mArg; /**< Function argument for the thread function. */ |
| } _thread_start_info; |
| |
| /* Thread wrapper function. */ |
| #if defined(_TTHREAD_WIN32_) |
| static unsigned WINAPI _thrd_wrapper_function(void * aArg) |
| #elif defined(_TTHREAD_POSIX_) |
| static void * _thrd_wrapper_function(void * aArg) |
| #endif |
| { |
| thrd_start_t fun; |
| void *arg; |
| int res; |
| #if defined(_TTHREAD_POSIX_) |
| void *pres; |
| #endif |
| |
| /* Get thread startup information */ |
| _thread_start_info *ti = (_thread_start_info *) aArg; |
| fun = ti->mFunction; |
| arg = ti->mArg; |
| |
| /* The thread is responsible for freeing the startup information */ |
| free((void *)ti); |
| |
| /* Call the actual client thread function */ |
| res = fun(arg); |
| |
| #if defined(_TTHREAD_WIN32_) |
| return res; |
| #else |
| pres = malloc(sizeof(int)); |
| if (pres != NULL) |
| { |
| *(int*)pres = res; |
| } |
| return pres; |
| #endif |
| } |
| |
| int thrd_create(thrd_t *thr, thrd_start_t func, void *arg) |
| { |
| /* Fill out the thread startup information (passed to the thread wrapper, |
| which will eventually free it) */ |
| _thread_start_info* ti = (_thread_start_info*)malloc(sizeof(_thread_start_info)); |
| if (ti == NULL) |
| { |
| return thrd_nomem; |
| } |
| ti->mFunction = func; |
| ti->mArg = arg; |
| |
| /* Create the thread */ |
| #if defined(_TTHREAD_WIN32_) |
| *thr = (HANDLE)_beginthreadex(NULL, 0, _thrd_wrapper_function, (void *)ti, 0, NULL); |
| #elif defined(_TTHREAD_POSIX_) |
| if(pthread_create(thr, NULL, _thrd_wrapper_function, (void *)ti) != 0) |
| { |
| *thr = 0; |
| } |
| #endif |
| |
| /* Did we fail to create the thread? */ |
| if(!*thr) |
| { |
| free(ti); |
| return thrd_error; |
| } |
| |
| return thrd_success; |
| } |
| |
| thrd_t thrd_current(void) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| return GetCurrentThread(); |
| #else |
| return pthread_self(); |
| #endif |
| } |
| |
| int thrd_detach(thrd_t thr) |
| { |
| /* FIXME! */ |
| (void)thr; |
| return thrd_error; |
| } |
| |
| int thrd_equal(thrd_t thr0, thrd_t thr1) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| return thr0 == thr1; |
| #else |
| return pthread_equal(thr0, thr1); |
| #endif |
| } |
| |
| void thrd_exit(int res) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| ExitThread(res); |
| #else |
| void *pres = malloc(sizeof(int)); |
| if (pres != NULL) |
| { |
| *(int*)pres = res; |
| } |
| pthread_exit(pres); |
| #endif |
| } |
| |
| int thrd_join(thrd_t thr, int *res) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| if (WaitForSingleObject(thr, INFINITE) == WAIT_FAILED) |
| { |
| return thrd_error; |
| } |
| if (res != NULL) |
| { |
| DWORD dwRes; |
| GetExitCodeThread(thr, &dwRes); |
| *res = dwRes; |
| } |
| #elif defined(_TTHREAD_POSIX_) |
| void *pres; |
| int ires = 0; |
| if (pthread_join(thr, &pres) != 0) |
| { |
| return thrd_error; |
| } |
| if (pres != NULL) |
| { |
| ires = *(int*)pres; |
| free(pres); |
| } |
| if (res != NULL) |
| { |
| *res = ires; |
| } |
| #endif |
| return thrd_success; |
| } |
| |
| int thrd_sleep(const struct timespec *time_point, struct timespec *remaining) |
| { |
| struct timespec now; |
| #if defined(_TTHREAD_WIN32_) |
| DWORD delta; |
| #else |
| long delta; |
| #endif |
| |
| /* Get the current time */ |
| if (clock_gettime(CLOCK_REALTIME, &now) != 0) |
| return -2; // FIXME: Some specific error code? |
| |
| #if defined(_TTHREAD_WIN32_) |
| /* Delta in milliseconds */ |
| delta = (DWORD) ((time_point->tv_sec - now.tv_sec) * 1000 + |
| (time_point->tv_nsec - now.tv_nsec + 500000) / 1000000); |
| if (delta > 0) |
| { |
| Sleep(delta); |
| } |
| #else |
| /* Delta in microseconds */ |
| delta = (time_point->tv_sec - now.tv_sec) * 1000000L + |
| (time_point->tv_nsec - now.tv_nsec + 500L) / 1000L; |
| |
| /* On some systems, the usleep argument must be < 1000000 */ |
| while (delta > 999999L) |
| { |
| usleep(999999); |
| delta -= 999999L; |
| } |
| if (delta > 0L) |
| { |
| usleep((useconds_t)delta); |
| } |
| #endif |
| |
| /* We don't support waking up prematurely (yet) */ |
| if (remaining) |
| { |
| remaining->tv_sec = 0; |
| remaining->tv_nsec = 0; |
| } |
| return 0; |
| } |
| |
| 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; |
| } |
| |
| #if defined(_TTHREAD_EMULATE_CLOCK_GETTIME_) |
| int _tthread_clock_gettime(clockid_t clk_id, struct timespec *ts) |
| { |
| #if defined(_TTHREAD_WIN32_) |
| struct _timeb tb; |
| _ftime(&tb); |
| ts->tv_sec = (time_t)tb.time; |
| ts->tv_nsec = 1000000L * (long)tb.millitm; |
| #else |
| struct timeval tv; |
| gettimeofday(&tv, NULL); |
| ts->tv_sec = (time_t)tv.tv_sec; |
| ts->tv_nsec = 1000L * (long)tv.tv_usec; |
| #endif |
| return 0; |
| } |
| #endif // _TTHREAD_EMULATE_CLOCK_GETTIME_ |
| |