SDL_Quit_Wrapper(void)

    SDL_Quit();

printid(void)

    printf("Process %u:  exiting\n", SDL_ThreadID());

terminate(int sig)

    signal(SIGINT, terminate);

closemutex(int sig)

    Uint32 id = SDL_ThreadID();

    printf("Process %u:  Cleaning up...\n", id == mainthread ? 0 : id);

        SDL_KillThread(threads[i]);

    SDL_DestroyMutex(mutex);

    exit(sig);

Run(void *data)

    if (SDL_ThreadID() == mainthread)

        signal(SIGTERM, closemutex);

        printf("Process %u ready to work\n", SDL_ThreadID());

        if (SDL_mutexP(mutex) < 0) {

            fprintf(stderr, "Couldn't lock mutex: %s", SDL_GetError());

            exit(1);

        printf("Process %u, working!\n", SDL_ThreadID());

        SDL_Delay(1 * 1000);

        printf("Process %u, done!\n", SDL_ThreadID());

        if (SDL_mutexV(mutex) < 0) {

            fprintf(stderr, "Couldn't unlock mutex: %s", SDL_GetError());

            exit(1);

        SDL_Delay(10);

        if (SDL_ThreadID() == mainthread && doterminate) {

            printf("Process %u:  raising SIGTERM\n", SDL_ThreadID());

            raise(SIGTERM);

main(int argc, char *argv[])

    if (SDL_Init(0) < 0) {

        fprintf(stderr, "%s\n", SDL_GetError());

        exit(1);

    atexit(SDL_Quit_Wrapper);

    if ((mutex = SDL_CreateMutex()) == NULL) {

        fprintf(stderr, "Couldn't create mutex: %s\n", SDL_GetError());

        exit(1);

    mainthread = SDL_ThreadID();

    printf("Main thread: %u\n", mainthread);

    atexit(printid);

        if ((threads[i] = SDL_CreateThread(Run, NULL)) == NULL)

            fprintf(stderr, "Couldn't create thread!\n");

    signal(SIGINT, terminate);

    Run(NULL);