146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2023 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_PS2
|
|
|
|
/* Semaphore functions for the PS2. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <timer_alarm.h>
|
|
|
|
#include <kernel.h>
|
|
|
|
struct SDL_semaphore
|
|
{
|
|
s32 semid;
|
|
};
|
|
|
|
static void usercb(struct timer_alarm_t *alarm, void *arg)
|
|
{
|
|
iReleaseWaitThread((int)arg);
|
|
}
|
|
|
|
/* Create a semaphore */
|
|
SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
|
|
{
|
|
SDL_sem *sem;
|
|
ee_sema_t sema;
|
|
|
|
sem = (SDL_sem *)SDL_malloc(sizeof(*sem));
|
|
if (sem != NULL) {
|
|
/* TODO: Figure out the limit on the maximum value. */
|
|
sema.init_count = initial_value;
|
|
sema.max_count = 255;
|
|
sema.option = 0;
|
|
sem->semid = CreateSema(&sema);
|
|
|
|
if (sem->semid < 0) {
|
|
SDL_SetError("Couldn't create semaphore");
|
|
SDL_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) {
|
|
DeleteSema(sem->semid);
|
|
sem->semid = 0;
|
|
}
|
|
|
|
SDL_free(sem);
|
|
}
|
|
}
|
|
|
|
int SDL_SemWaitTimeoutNS(SDL_sem *sem, Sint64 timeoutNS)
|
|
{
|
|
int ret;
|
|
struct timer_alarm_t alarm;
|
|
InitializeTimerAlarm(&alarm);
|
|
|
|
if (sem == NULL) {
|
|
return SDL_InvalidParamError("sem");
|
|
}
|
|
|
|
if (timeoutNS == 0) {
|
|
if (PollSema(sem->semid) < 0) {
|
|
return SDL_MUTEX_TIMEDOUT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (timeoutNS != SDL_MUTEX_MAXWAIT) {
|
|
SetTimerAlarm(&alarm, MSec2TimerBusClock(SDL_NS_TO_MS(timeoutNS)), &usercb, (void *)GetThreadId());
|
|
}
|
|
|
|
ret = WaitSema(sem->semid);
|
|
StopTimerAlarm(&alarm);
|
|
|
|
if (ret < 0) {
|
|
return SDL_MUTEX_TIMEDOUT;
|
|
}
|
|
return 0; // Wait condition satisfied.
|
|
}
|
|
|
|
/* Returns the current count of the semaphore */
|
|
Uint32 SDL_SemValue(SDL_sem *sem)
|
|
{
|
|
ee_sema_t info;
|
|
|
|
if (sem == NULL) {
|
|
SDL_InvalidParamError("sem");
|
|
return 0;
|
|
}
|
|
|
|
if (ReferSemaStatus(sem->semid, &info) >= 0) {
|
|
return info.count;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int SDL_SemPost(SDL_sem *sem)
|
|
{
|
|
int res;
|
|
|
|
if (sem == NULL) {
|
|
return SDL_InvalidParamError("sem");
|
|
}
|
|
|
|
res = SignalSema(sem->semid);
|
|
if (res < 0) {
|
|
return SDL_SetError("sceKernelSignalSema() failed");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* SDL_THREAD_PS2 */
|