shithub: cstory

ref: ca5b0928075a22693d6bf07e7a5dbab41e3ca286
dir: /external/SDL2/test/testerror.c/

/*
  Copyright (C) 1997-2019 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
  freely.
*/

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

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

#include "SDL.h"

static int alive = 0;

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

int SDLCALL
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) {
        SDL_Log("Thread '%s' is alive!\n", (char *) data);
        SDL_Delay(1 * 1000);
    }
    SDL_Log("Child thread error string: %s\n", SDL_GetError());
    return (0);
}

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

    /* Enable standard application logging */
    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

    /* Load the SDL library */
    if (SDL_Init(0) < 0) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "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) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
        quit(1);
    }
    SDL_Delay(5 * 1000);
    SDL_Log("Waiting for thread #1\n");
    alive = 0;
    SDL_WaitThread(thread, NULL);

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

    SDL_Quit();
    return (0);
}