SDL  2.0
testthread.c
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1 /*
2  Copyright (C) 1997-2018 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
26 quit(int rc)
27 {
28  SDL_Quit();
29  exit(rc);
30 }
31 
32 int SDLCALL
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
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
56 main(int argc, char *argv[])
57 {
58  SDL_Thread *thread;
59 
60  /* Enable standard application logging */
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 }
#define SDL_TLSSet
#define SDL_ThreadID
int ThreadFunc(void *data)
Definition: testthread.c:33
#define SDL_GetError
static void killed(int sig)
Definition: testthread.c:47
int main(int argc, char *argv[])
Definition: testthread.c:56
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
unsigned int SDL_TLSID
Definition: SDL_thread.h:52
#define SDL_LogError
#define SDL_Log
#define SDL_Quit
#define SDL_TLSCreate
static int alive
Definition: testthread.c:22
#define SDL_CreateThread
#define SDL_Delay
#define SDL_TLSGet
#define SDL_assert(condition)
Definition: SDL_assert.h:169
#define SDL_LogSetPriority
#define NULL
Definition: begin_code.h:164
static SDL_TLSID tls
Definition: testthread.c:21
static void quit(int rc)
Definition: testthread.c:26
#define SDL_Init
#define SDLCALL
Definition: SDL_internal.h:45
#define SDL_WaitThread