| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2024 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" |
| |
| #ifdef SDL_THREAD_PSP |
| |
| // An implementation of mutexes using semaphores |
| |
| #include "SDL_systhread_c.h" |
| |
| #include <pspthreadman.h> |
| #include <pspkerror.h> |
| |
| #define SCE_KERNEL_MUTEX_ATTR_RECURSIVE 0x0200U |
| |
| struct SDL_Mutex |
| { |
| SceLwMutexWorkarea lock; |
| }; |
| |
| SDL_Mutex *SDL_CreateMutex(void) |
| { |
| SDL_Mutex *mutex = (SDL_Mutex *)SDL_malloc(sizeof(*mutex)); |
| if (mutex) { |
| const SceInt32 res = sceKernelCreateLwMutex( |
| &mutex->lock, |
| "SDL mutex", |
| SCE_KERNEL_MUTEX_ATTR_RECURSIVE, |
| 0, |
| NULL); |
| |
| if (res < 0) { |
| SDL_free(mutex); |
| mutex = NULL; |
| SDL_SetError("Error trying to create mutex: %lx", res); |
| } |
| } |
| return mutex; |
| } |
| |
| void SDL_DestroyMutex(SDL_Mutex *mutex) |
| { |
| if (mutex) { |
| sceKernelDeleteLwMutex(&mutex->lock); |
| SDL_free(mutex); |
| } |
| } |
| |
| void SDL_LockMutex(SDL_Mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS // clang doesn't know about NULL mutexes |
| { |
| #ifndef SDL_THREADS_DISABLED |
| if (mutex != NULL) { |
| const SceInt32 res = sceKernelLockLwMutex(&mutex->lock, 1, NULL); |
| SDL_assert(res == SCE_KERNEL_ERROR_OK); // assume we're in a lot of trouble if this assert fails. |
| } |
| #endif // SDL_THREADS_DISABLED |
| } |
| |
| int SDL_TryLockMutex(SDL_Mutex *mutex) |
| { |
| int retval = 0; |
| #ifndef SDL_THREADS_DISABLED |
| if (mutex) { |
| const SceInt32 res = sceKernelTryLockLwMutex(&mutex->lock, 1); |
| if (res == SCE_KERNEL_ERROR_OK) { |
| retval = 0; |
| } else if (res == SCE_KERNEL_ERROR_WAIT_TIMEOUT) { |
| retval = SDL_MUTEX_TIMEDOUT; |
| } else { |
| SDL_assert(!"Error trying to lock mutex"); // assume we're in a lot of trouble if this assert fails. |
| retval = SDL_MUTEX_TIMEDOUT; |
| } |
| } |
| #endif // SDL_THREADS_DISABLED |
| return retval; |
| } |
| |
| void SDL_UnlockMutex(SDL_Mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS // clang doesn't know about NULL mutexes |
| { |
| #ifndef SDL_THREADS_DISABLED |
| if (mutex != NULL) { |
| const SceInt32 res = sceKernelUnlockLwMutex(&mutex->lock, 1); |
| SDL_assert(res == 0); // assume we're in a lot of trouble if this assert fails. |
| } |
| #endif // SDL_THREADS_DISABLED |
| } |
| |
| #endif // SDL_THREAD_PSP |