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https://github.com/libsdl-org/SDL.git
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122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
/*
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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.
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*/
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/* Simple test of the SDL threading code */
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#include <stdlib.h>
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#include <signal.h>
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#include <SDL3/SDL.h>
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#include <SDL3/SDL_main.h>
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#include <SDL3/SDL_test.h>
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#define NUMTHREADS 10
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static SDL_AtomicInt time_for_threads_to_die[NUMTHREADS];
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/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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static void
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quit(int rc)
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{
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SDL_Quit();
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/* Let 'main()' return normally */
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if (rc != 0) {
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exit(rc);
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}
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}
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static int SDLCALL
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SubThreadFunc(void *data)
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{
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SDL_AtomicInt *flag = (SDL_AtomicInt *)data;
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while (!SDL_GetAtomicInt(flag)) {
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SDL_Delay(10);
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}
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return 0;
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}
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static int SDLCALL
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ThreadFunc(void *data)
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{
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SDL_Thread *sub_threads[NUMTHREADS];
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SDL_AtomicInt flags[NUMTHREADS];
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int i;
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int tid = (int)(uintptr_t)data;
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SDL_Log("Creating Thread %d\n", tid);
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for (i = 0; i < NUMTHREADS; i++) {
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char name[64];
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(void)SDL_snprintf(name, sizeof(name), "Child%d_%d", tid, i);
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SDL_SetAtomicInt(&flags[i], 0);
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sub_threads[i] = SDL_CreateThread(SubThreadFunc, name, &flags[i]);
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}
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SDL_Log("Thread '%d' waiting for signal\n", tid);
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while (SDL_GetAtomicInt(&time_for_threads_to_die[tid]) != 1) {
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; /* do nothing */
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}
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SDL_Log("Thread '%d' sending signals to subthreads\n", tid);
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for (i = 0; i < NUMTHREADS; i++) {
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SDL_SetAtomicInt(&flags[i], 1);
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SDL_WaitThread(sub_threads[i], NULL);
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}
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SDL_Log("Thread '%d' exiting!\n", tid);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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SDL_Thread *threads[NUMTHREADS];
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int i;
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SDLTest_CommonState *state;
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/* Initialize test framework */
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state = SDLTest_CommonCreateState(argv, 0);
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if (!state) {
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return 1;
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}
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if (!SDLTest_CommonDefaultArgs(state, argc, argv)) {
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SDL_Quit();
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SDLTest_CommonDestroyState(state);
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return 1;
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}
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(void)signal(SIGSEGV, SIG_DFL);
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for (i = 0; i < NUMTHREADS; i++) {
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char name[64];
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(void)SDL_snprintf(name, sizeof(name), "Parent%d", i);
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SDL_SetAtomicInt(&time_for_threads_to_die[i], 0);
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threads[i] = SDL_CreateThread(ThreadFunc, name, (void *)(uintptr_t)i);
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if (threads[i] == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
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quit(1);
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}
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}
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for (i = 0; i < NUMTHREADS; i++) {
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SDL_SetAtomicInt(&time_for_threads_to_die[i], 1);
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}
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for (i = 0; i < NUMTHREADS; i++) {
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SDL_WaitThread(threads[i], NULL);
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}
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SDL_Quit();
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SDLTest_CommonDestroyState(state);
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return 0;
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}
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