author Ryan C. Gordon <icculus@icculus.org>
Sun, 02 Oct 2011 00:29:16 -0400
changeset 5969 3a041d215edc
parent 5535 96594ac5fd1a
child 7517 965d57022c01
permissions -rw-r--r--
1.3 API CHANGE: Add support for naming threads.

  Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it

/* Simple test of the SDL threading code and error handling */

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>

#include "SDL.h"
#include "SDL_thread.h"

static int alive = 0;

/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
quit(int rc)

ThreadFunc(void *data)
    /* Set the child thread error string */
    SDL_SetError("Thread %s (%lu) had a problem: %s",
                 (char *) data, SDL_ThreadID(), "nevermind");
    while (alive) {
        printf("Thread '%s' is alive!\n", (char *) data);
        SDL_Delay(1 * 1000);
    printf("Child thread error string: %s\n", SDL_GetError());
    return (0);

main(int argc, char *argv[])
    SDL_Thread *thread;

    /* Load the SDL library */
    if (SDL_Init(0) < 0) {
        fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
        return (1);

    /* Set the error value for the main thread */
    SDL_SetError("No worries");

    alive = 1;
    thread = SDL_CreateThread(ThreadFunc, NULL, "#1");
    if (thread == NULL) {
        fprintf(stderr, "Couldn't create thread: %s\n", SDL_GetError());
    SDL_Delay(5 * 1000);
    printf("Waiting for thread #1\n");
    alive = 0;
    SDL_WaitThread(thread, NULL);

    printf("Main thread error string: %s\n", SDL_GetError());

    return (0);