diff options
Diffstat (limited to '3rdparty/SDL2/src/thread/psp/SDL_sysmutex.c')
-rw-r--r-- | 3rdparty/SDL2/src/thread/psp/SDL_sysmutex.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/3rdparty/SDL2/src/thread/psp/SDL_sysmutex.c b/3rdparty/SDL2/src/thread/psp/SDL_sysmutex.c deleted file mode 100644 index 78129fa69ae..00000000000 --- a/3rdparty/SDL2/src/thread/psp/SDL_sysmutex.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> - - 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. -*/ -#include "../../SDL_internal.h" - -#if SDL_THREAD_PSP - -/* An implementation of mutexes using semaphores */ - -#include "SDL_thread.h" -#include "SDL_systhread_c.h" - - -struct SDL_mutex -{ - int recursive; - SDL_threadID owner; - SDL_sem *sem; -}; - -/* Create a mutex */ -SDL_mutex * -SDL_CreateMutex(void) -{ - SDL_mutex *mutex; - - /* Allocate mutex memory */ - mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex)); - if (mutex) { - /* Create the mutex semaphore, with initial value 1 */ - mutex->sem = SDL_CreateSemaphore(1); - mutex->recursive = 0; - mutex->owner = 0; - if (!mutex->sem) { - SDL_free(mutex); - mutex = NULL; - } - } else { - SDL_OutOfMemory(); - } - return mutex; -} - -/* Free the mutex */ -void -SDL_DestroyMutex(SDL_mutex * mutex) -{ - if (mutex) { - if (mutex->sem) { - SDL_DestroySemaphore(mutex->sem); - } - SDL_free(mutex); - } -} - -/* Lock the semaphore */ -int -SDL_mutexP(SDL_mutex * mutex) -{ -#if SDL_THREADS_DISABLED - return 0; -#else - SDL_threadID this_thread; - - if (mutex == NULL) { - return SDL_SetError("Passed a NULL mutex"); - } - - this_thread = SDL_ThreadID(); - 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. - */ - SDL_SemWait(mutex->sem); - mutex->owner = this_thread; - mutex->recursive = 0; - } - - return 0; -#endif /* SDL_THREADS_DISABLED */ -} - -/* Unlock the mutex */ -int -SDL_mutexV(SDL_mutex * mutex) -{ -#if SDL_THREADS_DISABLED - return 0; -#else - if (mutex == NULL) { - return SDL_SetError("Passed a NULL mutex"); - } - - /* If we don't own the mutex, we can't unlock it */ - if (SDL_ThreadID() != mutex->owner) { - return SDL_SetError("mutex not owned by this thread"); - } - - 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; - SDL_SemPost(mutex->sem); - } - return 0; -#endif /* SDL_THREADS_DISABLED */ -} - -#endif /* SDL_THREAD_PSP */ - -/* vi: set ts=4 sw=4 expandtab: */ |