| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2021 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 |
| |
| /* Semaphore functions for the PSP. */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "SDL_error.h" |
| #include "SDL_thread.h" |
| |
| #include <pspthreadman.h> |
| #include <pspkerror.h> |
| |
| struct SDL_semaphore { |
| SceUID semid; |
| }; |
| |
| |
| /* Create a semaphore */ |
| SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) |
| { |
| SDL_sem *sem; |
| |
| sem = (SDL_sem *) malloc(sizeof(*sem)); |
| if (sem != NULL) { |
| /* TODO: Figure out the limit on the maximum value. */ |
| sem->semid = sceKernelCreateSema("SDL sema", 0, initial_value, 255, NULL); |
| if (sem->semid < 0) { |
| SDL_SetError("Couldn't create semaphore"); |
| free(sem); |
| sem = NULL; |
| } |
| } else { |
| SDL_OutOfMemory(); |
| } |
| |
| return sem; |
| } |
| |
| /* Free the semaphore */ |
| void SDL_DestroySemaphore(SDL_sem *sem) |
| { |
| if (sem != NULL) { |
| if (sem->semid > 0) { |
| sceKernelDeleteSema(sem->semid); |
| sem->semid = 0; |
| } |
| |
| free(sem); |
| } |
| } |
| |
| /* TODO: This routine is a bit overloaded. |
| * If the timeout is 0 then just poll the semaphore; if it's SDL_MUTEX_MAXWAIT, pass |
| * NULL to sceKernelWaitSema() so that it waits indefinitely; and if the timeout |
| * is specified, convert it to microseconds. */ |
| int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) |
| { |
| Uint32 *pTimeout; |
| int res; |
| |
| if (sem == NULL) { |
| SDL_SetError("Passed a NULL sem"); |
| return 0; |
| } |
| |
| if (timeout == 0) { |
| res = sceKernelPollSema(sem->semid, 1); |
| if (res < 0) { |
| return SDL_MUTEX_TIMEDOUT; |
| } |
| return 0; |
| } |
| |
| if (timeout == SDL_MUTEX_MAXWAIT) { |
| pTimeout = NULL; |
| } else { |
| timeout *= 1000; /* Convert to microseconds. */ |
| pTimeout = &timeout; |
| } |
| |
| res = sceKernelWaitSema(sem->semid, 1, pTimeout); |
| switch (res) { |
| case SCE_KERNEL_ERROR_OK: |
| return 0; |
| case SCE_KERNEL_ERROR_WAIT_TIMEOUT: |
| return SDL_MUTEX_TIMEDOUT; |
| default: |
| return SDL_SetError("sceKernelWaitSema() failed"); |
| } |
| } |
| |
| int SDL_SemTryWait(SDL_sem *sem) |
| { |
| return SDL_SemWaitTimeout(sem, 0); |
| } |
| |
| int SDL_SemWait(SDL_sem *sem) |
| { |
| return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT); |
| } |
| |
| /* Returns the current count of the semaphore */ |
| Uint32 SDL_SemValue(SDL_sem *sem) |
| { |
| SceKernelSemaInfo info; |
| |
| if (sem == NULL) { |
| SDL_SetError("Passed a NULL sem"); |
| return 0; |
| } |
| |
| if (sceKernelReferSemaStatus(sem->semid, &info) >= 0) { |
| return info.currentCount; |
| } |
| |
| return 0; |
| } |
| |
| int SDL_SemPost(SDL_sem *sem) |
| { |
| int res; |
| |
| if (sem == NULL) { |
| return SDL_SetError("Passed a NULL sem"); |
| } |
| |
| res = sceKernelSignalSema(sem->semid, 1); |
| if (res < 0) { |
| return SDL_SetError("sceKernelSignalSema() failed"); |
| } |
| |
| return 0; |
| } |
| |
| #endif /* SDL_THREAD_PSP */ |
| |
| /* vim: ts=4 sw=4 |
| */ |