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Copy pathSDL_sysmutex.c
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148 lines (120 loc) · 3.44 KB
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/*
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_thread.h"
#include "SDL_systhread_c.h"
#include <pspthreadman.h>
#include <pspkerror.h>
#define SCE_KERNEL_MUTEX_ATTR_RECURSIVE 0x0200U
struct SDL_mutex
{
SceLwMutexWorkarea lock;
};
/* Create a mutex */
SDL_mutex *SDL_CreateMutex(void)
{
SDL_mutex *mutex = NULL;
SceInt32 res = 0;
/* Allocate mutex memory */
mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
if (mutex) {
res = sceKernelCreateLwMutex(
&mutex->lock,
"SDL mutex",
SCE_KERNEL_MUTEX_ATTR_RECURSIVE,
0,
NULL);
if (res < 0) {
SDL_SetError("Error trying to create mutex: %lx", res);
}
} else {
SDL_OutOfMemory();
}
return mutex;
}
/* Free the mutex */
void SDL_DestroyMutex(SDL_mutex *mutex)
{
if (mutex) {
sceKernelDeleteLwMutex(&mutex->lock);
SDL_free(mutex);
}
}
/* Lock the mutex */
int SDL_LockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
{
#ifdef SDL_THREADS_DISABLED
return 0;
#else
SceInt32 res = 0;
if (mutex == NULL) {
return 0;
}
res = sceKernelLockLwMutex(&mutex->lock, 1, NULL);
if (res != SCE_KERNEL_ERROR_OK) {
return SDL_SetError("Error trying to lock mutex: %lx", res);
}
return 0;
#endif /* SDL_THREADS_DISABLED */
}
/* Try to lock the mutex */
int SDL_TryLockMutex(SDL_mutex *mutex)
{
#ifdef SDL_THREADS_DISABLED
return 0;
#else
SceInt32 res = 0;
if (!mutex) {
return 0;
}
res = sceKernelTryLockLwMutex(&mutex->lock, 1);
switch (res) {
case SCE_KERNEL_ERROR_OK:
return 0;
break;
case SCE_KERNEL_ERROR_WAIT_TIMEOUT:
return SDL_MUTEX_TIMEDOUT;
break;
default:
return SDL_SetError("Error trying to lock mutex: %lx", res);
break;
}
return -1;
#endif /* SDL_THREADS_DISABLED */
}
/* Unlock the mutex */
int SDL_UnlockMutex(SDL_mutex *mutex) SDL_NO_THREAD_SAFETY_ANALYSIS /* clang doesn't know about NULL mutexes */
{
#ifdef SDL_THREADS_DISABLED
return 0;
#else
SceInt32 res = 0;
if (mutex == NULL) {
return 0;
}
res = sceKernelUnlockLwMutex(&mutex->lock, 1);
if (res != 0) {
return SDL_SetError("Error trying to unlock mutex: %lx", res);
}
return 0;
#endif /* SDL_THREADS_DISABLED */
}
#endif /* SDL_THREAD_PSP */
/* vi: set ts=4 sw=4 expandtab: */