Atlas - torturethread.c
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[FILE BEGIN]
1/*
2  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
3
4  This software is provided 'as-is', without any express or implied
5  warranty.  In no event will the authors be held liable for any damages
6  arising from the use of this software.
7
8  Permission is granted to anyone to use this software for any purpose,
9  including commercial applications, and to alter it and redistribute it
10  freely.
11*/
12
13/* Simple test of the SDL threading code */
14
15#include <stdlib.h>
16#include <signal.h>
17
18#include <SDL3/SDL.h>
19#include <SDL3/SDL_main.h>
20#include <SDL3/SDL_test.h>
21
22#define NUMTHREADS 10
23
24static SDL_AtomicInt time_for_threads_to_die[NUMTHREADS];
25
26/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
27static void
28quit(int rc)
29{
30    SDL_Quit();
31    /* Let 'main()' return normally */
32    if (rc != 0) {
33        exit(rc);
34    }
35}
36
37static int SDLCALL
38SubThreadFunc(void *data)
39{
40    SDL_AtomicInt *flag = (SDL_AtomicInt *)data;
41    while (!SDL_GetAtomicInt(flag)) {
42        SDL_Delay(10);
43    }
44    return 0;
45}
46
47static int SDLCALL
48ThreadFunc(void *data)
49{
50    SDL_Thread *sub_threads[NUMTHREADS];
51    SDL_AtomicInt flags[NUMTHREADS];
52    int i;
53    int tid = (int)(uintptr_t)data;
54
55    SDL_Log("Creating Thread %d", tid);
56
57    for (i = 0; i < NUMTHREADS; i++) {
58        char name[64];
59        (void)SDL_snprintf(name, sizeof(name), "Child%d_%d", tid, i);
60        SDL_SetAtomicInt(&flags[i], 0);
61        sub_threads[i] = SDL_CreateThread(SubThreadFunc, name, &flags[i]);
62    }
63
64    SDL_Log("Thread '%d' waiting for signal", tid);
65    while (SDL_GetAtomicInt(&time_for_threads_to_die[tid]) != 1) {
66        ; /* do nothing */
67    }
68
69    SDL_Log("Thread '%d' sending signals to subthreads", tid);
70    for (i = 0; i < NUMTHREADS; i++) {
71        SDL_SetAtomicInt(&flags[i], 1);
72        SDL_WaitThread(sub_threads[i], NULL);
73    }
74
75    SDL_Log("Thread '%d' exiting!", tid);
76
77    return 0;
78}
79
80int main(int argc, char *argv[])
81{
82    SDL_Thread *threads[NUMTHREADS];
83    int i;
84    SDLTest_CommonState *state;
85
86    /* Initialize test framework */
87    state = SDLTest_CommonCreateState(argv, 0);
88    if (!state) {
89        return 1;
90    }
91
92    if (!SDLTest_CommonDefaultArgs(state, argc, argv)) {
93        SDL_Quit();
94        SDLTest_CommonDestroyState(state);
95        return 1;
96    }
97
98    (void)signal(SIGSEGV, SIG_DFL);
99    for (i = 0; i < NUMTHREADS; i++) {
100        char name[64];
101        (void)SDL_snprintf(name, sizeof(name), "Parent%d", i);
102        SDL_SetAtomicInt(&time_for_threads_to_die[i], 0);
103        threads[i] = SDL_CreateThread(ThreadFunc, name, (void *)(uintptr_t)i);
104
105        if (threads[i] == NULL) {
106            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s", SDL_GetError());
107            quit(1);
108        }
109    }
110
111    for (i = 0; i < NUMTHREADS; i++) {
112        SDL_SetAtomicInt(&time_for_threads_to_die[i], 1);
113    }
114
115    for (i = 0; i < NUMTHREADS; i++) {
116        SDL_WaitThread(threads[i], NULL);
117    }
118    SDL_Quit();
119    SDLTest_CommonDestroyState(state);
120    return 0;
121}
122
[FILE END]
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