55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
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#include <stdio.h>
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#include <SDL2/SDL.h>
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SDL_mutex *s_lock = NULL;
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SDL_cond *s_cond = NULL;
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int work_thread(void *arg) {
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SDL_LockMutex(s_lock);
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printf("<=========work_thread sleep=========>\n");
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sleep(10);
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printf("<=========work_thread wait condition=========>\n");
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SDL_CondWait(s_cond, s_lock);
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printf("<=========work_thread receive signal=========>\n");
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printf("<=========work_thread end=========>\n");
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SDL_UnlockMutex(s_lock);
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return 0;
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}
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#undef main
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int main()
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{
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s_lock = SDL_CreateMutex();
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s_cond = SDL_CreateCond();
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SDL_Thread *t = SDL_CreateThread(work_thread, "work_thread", NULL);
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if (!t) {
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printf("SDL_CreateThread() failed\n");
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return -1;
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}
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for (int i = 0; i < 2; i++) {
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sleep(2);
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printf("main execute\n");
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}
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printf("SDL_LockMutex(s_lock) before\n");
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SDL_LockMutex(s_lock);
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printf("SDL_LockMutex(s_lock) after\n");
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printf("SDL_CondSignal(s_cond) before\n");
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SDL_CondSignal(s_cond);
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printf("SDL_CondSignal(s_cond) after\n");
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sleep(10);
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printf("SDL_UnlockMutex(s_lock) before\n");
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SDL_UnlockMutex(s_lock);
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printf("SDL_UnlockMutex(s_lock) after\n");
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SDL_WaitThread(t, NULL);
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SDL_DestroyMutex(s_lock);
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SDL_DestroyCond(s_cond);
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return 0;
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}
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