Atlas - SDL_systhread.c
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21#include "SDL_internal.h"
22
23#ifdef SDL_THREAD_PS2
24
25// PS2 thread management routines for SDL
26
27#include <stdio.h>
28#include <stdlib.h>
29
30#include "../SDL_systhread.h"
31#include "../SDL_thread_c.h"
32#include <kernel.h>
33
34static void FinishThread(SDL_Thread *thread)
35{
36    ee_thread_status_t info;
37    int res;
38
39    res = ReferThreadStatus(thread->handle, &info);
40    TerminateThread(thread->handle);
41    DeleteThread(thread->handle);
42    DeleteSema((int)thread->endfunc);
43
44    if (res > 0) {
45        SDL_free(info.stack);
46    }
47}
48
49static int childThread(void *arg)
50{
51    SDL_Thread *thread = (SDL_Thread *)arg;
52    int res = thread->userfunc(thread->userdata);
53    SignalSema((int)thread->endfunc);
54    return res;
55}
56
57bool SDL_SYS_CreateThread(SDL_Thread *thread,
58                          SDL_FunctionPointer pfnBeginThread,
59                          SDL_FunctionPointer pfnEndThread)
60{
61    ee_thread_status_t status;
62    ee_thread_t eethread;
63    ee_sema_t sema;
64    size_t stack_size;
65    int priority = 32;
66
67    // Set priority of new thread to the same as the current thread
68    // status.size = sizeof(ee_thread_t);
69    if (ReferThreadStatus(GetThreadId(), &status) == 0) {
70        priority = status.current_priority;
71    }
72
73    stack_size = thread->stacksize ? ((int)thread->stacksize) : 0x1800;
74
75    // Create EE Thread
76    eethread.attr = 0;
77    eethread.option = 0;
78    eethread.func = &childThread;
79    eethread.stack = SDL_malloc(stack_size);
80    eethread.stack_size = stack_size;
81    eethread.gp_reg = &_gp;
82    eethread.initial_priority = priority;
83    thread->handle = CreateThread(&eethread);
84
85    if (thread->handle < 0) {
86        return SDL_SetError("CreateThread() failed");
87    }
88
89    // Prepare el semaphore for the ending function
90    sema.init_count = 0;
91    sema.max_count = 1;
92    sema.option = 0;
93    thread->endfunc = (void *)CreateSema(&sema);
94
95    if (StartThread(thread->handle, thread) < 0) {
96        return SDL_SetError("StartThread() failed");
97    }
98    return true;
99}
100
101void SDL_SYS_SetupThread(const char *name)
102{
103    // Do nothing.
104}
105
106SDL_ThreadID SDL_GetCurrentThreadID(void)
107{
108    return (SDL_ThreadID)GetThreadId();
109}
110
111void SDL_SYS_WaitThread(SDL_Thread *thread)
112{
113    WaitSema((int)thread->endfunc);
114    ReleaseWaitThread(thread->handle);
115    FinishThread(thread);
116}
117
118void SDL_SYS_DetachThread(SDL_Thread *thread)
119{
120    // Do nothing.
121}
122
123bool SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
124{
125    int value;
126
127    if (priority == SDL_THREAD_PRIORITY_LOW) {
128        value = 111;
129    } else if (priority == SDL_THREAD_PRIORITY_HIGH) {
130        value = 32;
131    } else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) {
132        value = 16;
133    } else {
134        value = 50;
135    }
136
137    if (ChangeThreadPriority(GetThreadId(), value) < 0) {
138        return SDL_SetError("ChangeThreadPriority() failed");
139    }
140    return true;
141}
142
143#endif // SDL_THREAD_PS2
144
[FILE END]
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