SDL

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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifdef SDL_THREAD_PS2
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// PS2 thread management routines for SDL
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#include <stdio.h>
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#include <stdlib.h>
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#include "../SDL_systhread.h"
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#include "../SDL_thread_c.h"
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#include <kernel.h>
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static void FinishThread(SDL_Thread *thread)
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{
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    ee_thread_status_t info;
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    int res;
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    res = ReferThreadStatus(thread->handle, &info);
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    TerminateThread(thread->handle);
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    DeleteThread(thread->handle);
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    DeleteSema((int)thread->endfunc);
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    if (res > 0) {
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        SDL_free(info.stack);
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    }
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}
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static int childThread(void *arg)
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{
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    SDL_Thread *thread = (SDL_Thread *)arg;
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    int res = thread->userfunc(thread->userdata);
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    SignalSema((int)thread->endfunc);
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    return res;
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}
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bool SDL_SYS_CreateThread(SDL_Thread *thread,
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                          SDL_FunctionPointer pfnBeginThread,
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                          SDL_FunctionPointer pfnEndThread)
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{
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    ee_thread_status_t status;
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    ee_thread_t eethread;
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    ee_sema_t sema;
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    size_t stack_size;
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    int priority = 32;
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    // Set priority of new thread to the same as the current thread
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    // status.size = sizeof(ee_thread_t);
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    if (ReferThreadStatus(GetThreadId(), &status) == 0) {
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        priority = status.current_priority;
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    }
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    stack_size = thread->stacksize ? ((int)thread->stacksize) : 0x1800;
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    // Create EE Thread
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    eethread.attr = 0;
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    eethread.option = 0;
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    eethread.func = &childThread;
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    eethread.stack = SDL_malloc(stack_size);
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    eethread.stack_size = stack_size;
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    eethread.gp_reg = &_gp;
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    eethread.initial_priority = priority;
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    thread->handle = CreateThread(&eethread);
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    if (thread->handle < 0) {
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        return SDL_SetError("CreateThread() failed");
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    }
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    // Prepare el semaphore for the ending function
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    sema.init_count = 0;
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    sema.max_count = 1;
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    sema.option = 0;
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    thread->endfunc = (void *)CreateSema(&sema);
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    if (StartThread(thread->handle, thread) < 0) {
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        return SDL_SetError("StartThread() failed");
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    }
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    return true;
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}
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void SDL_SYS_SetupThread(const char *name)
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{
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    // Do nothing.
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}
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SDL_ThreadID SDL_GetCurrentThreadID(void)
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{
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    return (SDL_ThreadID)GetThreadId();
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}
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void SDL_SYS_WaitThread(SDL_Thread *thread)
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{
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    WaitSema((int)thread->endfunc);
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    ReleaseWaitThread(thread->handle);
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    FinishThread(thread);
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}
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void SDL_SYS_DetachThread(SDL_Thread *thread)
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{
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    // Do nothing.
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}
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bool SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
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{
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    int value;
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    if (priority == SDL_THREAD_PRIORITY_LOW) {
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        value = 111;
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    } else if (priority == SDL_THREAD_PRIORITY_HIGH) {
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        value = 32;
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    } else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) {
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        value = 16;
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    } else {
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        value = 50;
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    }
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    if (ChangeThreadPriority(GetThreadId(), value) < 0) {
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        return SDL_SetError("ChangeThreadPriority() failed");
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    }
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    return true;
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}
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#endif // SDL_THREAD_PS2
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