diff options
Diffstat (limited to 'macosx/plugins/Common/SDL/src/thread/pthread/SDL_sysmutex.c')
| -rw-r--r-- | macosx/plugins/Common/SDL/src/thread/pthread/SDL_sysmutex.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/macosx/plugins/Common/SDL/src/thread/pthread/SDL_sysmutex.c b/macosx/plugins/Common/SDL/src/thread/pthread/SDL_sysmutex.c deleted file mode 100644 index d06d948f..00000000 --- a/macosx/plugins/Common/SDL/src/thread/pthread/SDL_sysmutex.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2010 Sam Lantinga - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - - Sam Lantinga - slouken@libsdl.org -*/ -#include "SDL_config.h" - -#define _GNU_SOURCE -#include <pthread.h> - -#include "SDL_thread.h" - -#if !SDL_THREAD_PTHREAD_RECURSIVE_MUTEX && \ - !SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP -#define FAKE_RECURSIVE_MUTEX -#endif - -struct SDL_mutex -{ - pthread_mutex_t id; -#ifdef FAKE_RECURSIVE_MUTEX - int recursive; - pthread_t owner; -#endif -}; - -SDL_mutex * -SDL_CreateMutex(void) -{ - SDL_mutex *mutex; - pthread_mutexattr_t attr; - - /* Allocate the structure */ - mutex = (SDL_mutex *) SDL_calloc(1, sizeof(*mutex)); - if (mutex) { - pthread_mutexattr_init(&attr); -#if SDL_THREAD_PTHREAD_RECURSIVE_MUTEX - pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); -#elif SDL_THREAD_PTHREAD_RECURSIVE_MUTEX_NP - pthread_mutexattr_setkind_np(&attr, PTHREAD_MUTEX_RECURSIVE_NP); -#else - /* No extra attributes necessary */ -#endif - if (pthread_mutex_init(&mutex->id, &attr) != 0) { - SDL_SetError("pthread_mutex_init() failed"); - SDL_free(mutex); - mutex = NULL; - } - } else { - SDL_OutOfMemory(); - } - return (mutex); -} - -void -SDL_DestroyMutex(SDL_mutex * mutex) -{ - if (mutex) { - pthread_mutex_destroy(&mutex->id); - SDL_free(mutex); - } -} - -/* Lock the mutex */ -int -SDL_mutexP(SDL_mutex * mutex) -{ - int retval; -#ifdef FAKE_RECURSIVE_MUTEX - pthread_t this_thread; -#endif - - if (mutex == NULL) { - SDL_SetError("Passed a NULL mutex"); - return -1; - } - - retval = 0; -#ifdef FAKE_RECURSIVE_MUTEX - this_thread = pthread_self(); - if (mutex->owner == this_thread) { - ++mutex->recursive; - } else { - /* The order of operations is important. - We set the locking thread id after we obtain the lock - so unlocks from other threads will fail. - */ - if (pthread_mutex_lock(&mutex->id) == 0) { - mutex->owner = this_thread; - mutex->recursive = 0; - } else { - SDL_SetError("pthread_mutex_lock() failed"); - retval = -1; - } - } -#else - if (pthread_mutex_lock(&mutex->id) < 0) { - SDL_SetError("pthread_mutex_lock() failed"); - retval = -1; - } -#endif - return retval; -} - -int -SDL_mutexV(SDL_mutex * mutex) -{ - int retval; - - if (mutex == NULL) { - SDL_SetError("Passed a NULL mutex"); - return -1; - } - - retval = 0; -#ifdef FAKE_RECURSIVE_MUTEX - /* We can only unlock the mutex if we own it */ - if (pthread_self() == mutex->owner) { - if (mutex->recursive) { - --mutex->recursive; - } else { - /* The order of operations is important. - First reset the owner so another thread doesn't lock - the mutex and set the ownership before we reset it, - then release the lock semaphore. - */ - mutex->owner = 0; - pthread_mutex_unlock(&mutex->id); - } - } else { - SDL_SetError("mutex not owned by this thread"); - retval = -1; - } - -#else - if (pthread_mutex_unlock(&mutex->id) < 0) { - SDL_SetError("pthread_mutex_unlock() failed"); - retval = -1; - } -#endif /* FAKE_RECURSIVE_MUTEX */ - - return retval; -} - -/* vi: set ts=4 sw=4 expandtab: */ |