1 /*
2 Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
3
4 This software is provided 'as-is', without any express or implied
5 warranty. In no event will the authors be held liable for any damages
6 arising from the use of this software.
7
8 Permission is granted to anyone to use this software for any purpose,
9 including commercial applications, and to alter it and redistribute it
10 freely.
11 */
12
13 /* Simple test of the SDL threading code and error handling */
14
15 #include <stdio.h>
16 #include <stdlib.h>
17 #include <signal.h>
18
19 #include "SDL.h"
20
21 static int alive = 0;
22
23 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
24 static void
quit(int rc)25 quit(int rc)
26 {
27 SDL_Quit();
28 exit(rc);
29 }
30
31 int SDLCALL
ThreadFunc(void * data)32 ThreadFunc(void *data)
33 {
34 /* Set the child thread error string */
35 SDL_SetError("Thread %s (%lu) had a problem: %s",
36 (char *) data, SDL_ThreadID(), "nevermind");
37 while (alive) {
38 SDL_Log("Thread '%s' is alive!\n", (char *) data);
39 SDL_Delay(1 * 1000);
40 }
41 SDL_Log("Child thread error string: %s\n", SDL_GetError());
42 return (0);
43 }
44
45 int
main(int argc,char * argv[])46 main(int argc, char *argv[])
47 {
48 SDL_Thread *thread;
49
50 /* Enable standard application logging */
51 SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
52
53 /* Load the SDL library */
54 if (SDL_Init(0) < 0) {
55 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
56 return (1);
57 }
58
59 /* Set the error value for the main thread */
60 SDL_SetError("No worries");
61
62 alive = 1;
63 thread = SDL_CreateThread(ThreadFunc, NULL, "#1");
64 if (thread == NULL) {
65 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
66 quit(1);
67 }
68 SDL_Delay(5 * 1000);
69 SDL_Log("Waiting for thread #1\n");
70 alive = 0;
71 SDL_WaitThread(thread, NULL);
72
73 SDL_Log("Main thread error string: %s\n", SDL_GetError());
74
75 SDL_Quit();
76 return (0);
77 }
78