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 */
14
15 #include <stdio.h>
16 #include <stdlib.h>
17 #include <signal.h>
18
19 #include "SDL.h"
20
21 static SDL_TLSID tls;
22 static int alive = 0;
23
24 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
25 static void
quit(int rc)26 quit(int rc)
27 {
28 SDL_Quit();
29 exit(rc);
30 }
31
32 int SDLCALL
ThreadFunc(void * data)33 ThreadFunc(void *data)
34 {
35 SDL_TLSSet(tls, "baby thread", NULL);
36 SDL_Log("Started thread %s: My thread id is %lu, thread data = %s\n",
37 (char *) data, SDL_ThreadID(), (const char *)SDL_TLSGet(tls));
38 while (alive) {
39 SDL_Log("Thread '%s' is alive!\n", (char *) data);
40 SDL_Delay(1 * 1000);
41 }
42 SDL_Log("Thread '%s' exiting!\n", (char *) data);
43 return (0);
44 }
45
46 static void
killed(int sig)47 killed(int sig)
48 {
49 SDL_Log("Killed with SIGTERM, waiting 5 seconds to exit\n");
50 SDL_Delay(5 * 1000);
51 alive = 0;
52 quit(0);
53 }
54
55 int
main(int argc,char * argv[])56 main(int argc, char *argv[])
57 {
58 SDL_Thread *thread;
59
60 /* Enable standard application logging */
61 SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
62
63 /* Load the SDL library */
64 if (SDL_Init(0) < 0) {
65 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
66 return (1);
67 }
68
69 tls = SDL_TLSCreate();
70 SDL_assert(tls);
71 SDL_TLSSet(tls, "main thread", NULL);
72 SDL_Log("Main thread data initially: %s\n", (const char *)SDL_TLSGet(tls));
73
74 alive = 1;
75 thread = SDL_CreateThread(ThreadFunc, "One", "#1");
76 if (thread == NULL) {
77 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
78 quit(1);
79 }
80 SDL_Delay(5 * 1000);
81 SDL_Log("Waiting for thread #1\n");
82 alive = 0;
83 SDL_WaitThread(thread, NULL);
84
85 SDL_Log("Main thread data finally: %s\n", (const char *)SDL_TLSGet(tls));
86
87 alive = 1;
88 signal(SIGTERM, killed);
89 thread = SDL_CreateThread(ThreadFunc, "Two", "#2");
90 if (thread == NULL) {
91 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
92 quit(1);
93 }
94 raise(SIGTERM);
95
96 SDL_Quit(); /* Never reached */
97 return (0); /* Never reached */
98 }
99