SDL 2.0
testthread.c
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1/*
2 Copyright (C) 1997-2019 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
22static int alive = 0;
23static int testprio = 0;
24
25/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
26static void
27quit(int rc)
28{
29 SDL_Quit();
30 exit(rc);
31}
32
33static const char *
35{
36 switch(priority)
37 {
38 case SDL_THREAD_PRIORITY_LOW: return "SDL_THREAD_PRIORITY_LOW";
39 case SDL_THREAD_PRIORITY_NORMAL: return "SDL_THREAD_PRIORITY_NORMAL";
40 case SDL_THREAD_PRIORITY_HIGH: return "SDL_THREAD_PRIORITY_HIGH";
41 case SDL_THREAD_PRIORITY_TIME_CRITICAL: return "SDL_THREAD_PRIORITY_TIME_CRITICAL";
42 }
43
44 return "???";
45}
46
47int SDLCALL
49{
51
52 SDL_TLSSet(tls, "baby thread", NULL);
53 SDL_Log("Started thread %s: My thread id is %lu, thread data = %s\n",
54 (char *) data, SDL_ThreadID(), (const char *)SDL_TLSGet(tls));
55 while (alive) {
56 SDL_Log("Thread '%s' is alive!\n", (char *) data);
57
58 if (testprio) {
59 SDL_Log("SDL_SetThreadPriority(%s):%d\n", getprioritystr(prio), SDL_SetThreadPriority(prio));
62 }
63
64 SDL_Delay(1 * 1000);
65 }
66 SDL_Log("Thread '%s' exiting!\n", (char *) data);
67 return (0);
68}
69
70static void
71killed(int sig)
72{
73 SDL_Log("Killed with SIGTERM, waiting 5 seconds to exit\n");
74 SDL_Delay(5 * 1000);
75 alive = 0;
76 quit(0);
77}
78
79int
80main(int argc, char *argv[])
81{
82 int arg = 1;
83 SDL_Thread *thread;
84
85 /* Enable standard application logging */
87
88 /* Load the SDL library */
89 if (SDL_Init(0) < 0) {
90 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
91 return (1);
92 }
93
94 while (argv[arg] && *argv[arg] == '-') {
95 if (SDL_strcmp(argv[arg], "--prio") == 0) {
96 testprio = 1;
97 }
98 ++arg;
99 }
100
101 tls = SDL_TLSCreate();
103 SDL_TLSSet(tls, "main thread", NULL);
104 SDL_Log("Main thread data initially: %s\n", (const char *)SDL_TLSGet(tls));
105
106 alive = 1;
107 thread = SDL_CreateThread(ThreadFunc, "One", "#1");
108 if (thread == NULL) {
109 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
110 quit(1);
111 }
112 SDL_Delay(5 * 1000);
113 SDL_Log("Waiting for thread #1\n");
114 alive = 0;
115 SDL_WaitThread(thread, NULL);
116
117 SDL_Log("Main thread data finally: %s\n", (const char *)SDL_TLSGet(tls));
118
119 alive = 1;
120 signal(SIGTERM, killed);
121 thread = SDL_CreateThread(ThreadFunc, "Two", "#2");
122 if (thread == NULL) {
123 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
124 quit(1);
125 }
126 raise(SIGTERM);
127
128 SDL_Quit(); /* Never reached */
129 return (0); /* Never reached */
130}
#define SDL_assert(condition)
Definition: SDL_assert.h:169
#define SDL_TLSCreate
#define SDL_GetError
#define SDL_TLSSet
#define SDL_CreateThread
#define SDL_SetThreadPriority
#define SDL_TLSGet
#define SDL_ThreadID
#define SDL_LogSetPriority
#define SDL_LogError
#define SDL_strcmp
#define SDL_Delay
#define SDL_WaitThread
#define SDL_Quit
#define SDL_Init
#define SDL_Log
#define SDLCALL
Definition: SDL_internal.h:49
@ SDL_LOG_PRIORITY_INFO
Definition: SDL_log.h:106
@ SDL_LOG_CATEGORY_APPLICATION
Definition: SDL_log.h:66
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
unsigned int SDL_TLSID
Definition: SDL_thread.h:52
SDL_ThreadPriority
Definition: SDL_thread.h:59
@ SDL_THREAD_PRIORITY_TIME_CRITICAL
Definition: SDL_thread.h:63
@ SDL_THREAD_PRIORITY_LOW
Definition: SDL_thread.h:60
@ SDL_THREAD_PRIORITY_HIGH
Definition: SDL_thread.h:62
@ SDL_THREAD_PRIORITY_NORMAL
Definition: SDL_thread.h:61
#define NULL
Definition: begin_code.h:167
int main(int argc, char *argv[])
Definition: testthread.c:80
static int testprio
Definition: testthread.c:23
static void quit(int rc)
Definition: testthread.c:27
static void killed(int sig)
Definition: testthread.c:71
static SDL_TLSID tls
Definition: testthread.c:21
static const char * getprioritystr(SDL_ThreadPriority priority)
Definition: testthread.c:34
int ThreadFunc(void *data)
Definition: testthread.c:48
static int alive
Definition: testthread.c:22