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/*
Simple DirectMedia Layer
Copyright (C) 1997-2025 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_VITA
// VITA thread management routines for SDL
#include <stdio.h>
#include <stdlib.h>
#include "../SDL_systhread.h"
#include "../SDL_thread_c.h"
#include <psp2/types.h>
#include <psp2/kernel/threadmgr.h>
#define VITA_THREAD_STACK_SIZE_MIN 0x1000 // 4KiB
#define VITA_THREAD_STACK_SIZE_MAX 0x2000000 // 32MiB
#define VITA_THREAD_STACK_SIZE_DEFAULT 0x10000 // 64KiB
#define VITA_THREAD_NAME_MAX 32
#define VITA_THREAD_PRIORITY_LOW 191
#define VITA_THREAD_PRIORITY_NORMAL 160
#define VITA_THREAD_PRIORITY_HIGH 112
#define VITA_THREAD_PRIORITY_TIME_CRITICAL 64
static int ThreadEntry(SceSize args, void *argp)
{
SDL_RunThread(*(SDL_Thread **)argp);
return 0;
}
bool SDL_SYS_CreateThread(SDL_Thread *thread,
SDL_FunctionPointer pfnBeginThread,
SDL_FunctionPointer pfnEndThread)
{
char thread_name[VITA_THREAD_NAME_MAX];
size_t stack_size = VITA_THREAD_STACK_SIZE_DEFAULT;
SDL_strlcpy(thread_name, "SDL thread", VITA_THREAD_NAME_MAX);
if (thread->name) {
SDL_strlcpy(thread_name, thread->name, VITA_THREAD_NAME_MAX);
}
if (thread->stacksize) {
if (thread->stacksize < VITA_THREAD_STACK_SIZE_MIN) {
thread->stacksize = VITA_THREAD_STACK_SIZE_MIN;
}
if (thread->stacksize > VITA_THREAD_STACK_SIZE_MAX) {
thread->stacksize = VITA_THREAD_STACK_SIZE_MAX;
}
stack_size = thread->stacksize;
}
// Create new thread with the same priority as the current thread
thread->handle = sceKernelCreateThread(
thread_name, // name
ThreadEntry, // function to run
0, // priority. 0 means priority of calling thread
stack_size, // stack size
0, // attributes. always 0
0, // cpu affinity mask. 0 = all CPUs
NULL // opt. always NULL
);
if (thread->handle < 0) {
return SDL_SetError("sceKernelCreateThread() failed");
}
sceKernelStartThread(thread->handle, 4, &thread);
return true;
}
void SDL_SYS_SetupThread(const char *name)
{
// Do nothing.
}
SDL_ThreadID SDL_GetCurrentThreadID(void)
{
return (SDL_ThreadID)sceKernelGetThreadId();
}
void SDL_SYS_WaitThread(SDL_Thread *thread)
{
sceKernelWaitThreadEnd(thread->handle, NULL, NULL);
sceKernelDeleteThread(thread->handle);
}
void SDL_SYS_DetachThread(SDL_Thread *thread)
{
// Do nothing.
}
bool SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
{
int value = VITA_THREAD_PRIORITY_NORMAL;
switch (priority) {
case SDL_THREAD_PRIORITY_LOW:
value = VITA_THREAD_PRIORITY_LOW;
break;
case SDL_THREAD_PRIORITY_NORMAL:
value = VITA_THREAD_PRIORITY_NORMAL;
break;
case SDL_THREAD_PRIORITY_HIGH:
value = VITA_THREAD_PRIORITY_HIGH;
break;
case SDL_THREAD_PRIORITY_TIME_CRITICAL:
value = VITA_THREAD_PRIORITY_TIME_CRITICAL;
break;
}
if (sceKernelChangeThreadPriority(0, value) < 0) {
return SDL_SetError("sceKernelChangeThreadPriority() failed");
}
return true;
}
#endif // SDL_THREAD_VITA
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