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 static int testprio = 0;
24 
25 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
26 static void
27 quit(int rc)
28 {
29  SDL_Quit();
30  exit(rc);
31 }
32 
33 static 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 
47 int 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 
70 static void
71 killed(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 
79 int
80 main(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();
102  SDL_assert(tls);
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 }
SDL.h
SDL_SetThreadPriority
#define SDL_SetThreadPriority
Definition: SDL_dynapi_overrides.h:477
SDL_GetError
#define SDL_GetError
Definition: SDL_dynapi_overrides.h:113
SDL_TLSSet
#define SDL_TLSSet
Definition: SDL_dynapi_overrides.h:482
SDL_LOG_CATEGORY_APPLICATION
@ SDL_LOG_CATEGORY_APPLICATION
Definition: SDL_log.h:66
NULL
#define NULL
Definition: begin_code.h:164
testprio
static int testprio
Definition: testthread.c:23
killed
static void killed(int sig)
Definition: testthread.c:71
SDL_THREAD_PRIORITY_TIME_CRITICAL
@ SDL_THREAD_PRIORITY_TIME_CRITICAL
Definition: SDL_thread.h:63
SDLCALL
#define SDLCALL
Definition: SDL_internal.h:45
SDL_THREAD_PRIORITY_HIGH
@ SDL_THREAD_PRIORITY_HIGH
Definition: SDL_thread.h:62
SDL_Thread
Definition: SDL_thread_c.h:55
SDL_THREAD_PRIORITY_LOW
@ SDL_THREAD_PRIORITY_LOW
Definition: SDL_thread.h:60
SDL_LogError
#define SDL_LogError
Definition: SDL_dynapi_overrides.h:36
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
main
int main(int argc, char *argv[])
Definition: testthread.c:80
SDL_Log
#define SDL_Log
Definition: SDL_dynapi_overrides.h:31
SDL_TLSID
unsigned int SDL_TLSID
Definition: SDL_thread.h:52
SDL_Quit
#define SDL_Quit
Definition: SDL_dynapi_overrides.h:58
alive
static int alive
Definition: testthread.c:22
SDL_Delay
#define SDL_Delay
Definition: SDL_dynapi_overrides.h:486
SDL_CreateThread
#define SDL_CreateThread
Definition: SDL_dynapi_overrides.h:41
SDL_assert
#define SDL_assert(condition)
Definition: SDL_assert.h:169
SDL_TLSGet
#define SDL_TLSGet
Definition: SDL_dynapi_overrides.h:481
SDL_TLSCreate
#define SDL_TLSCreate
Definition: SDL_dynapi_overrides.h:480
SDL_LOG_PRIORITY_INFO
@ SDL_LOG_PRIORITY_INFO
Definition: SDL_log.h:106
SDL_LogSetPriority
#define SDL_LogSetPriority
Definition: SDL_dynapi_overrides.h:236
SDL_THREAD_PRIORITY_NORMAL
@ SDL_THREAD_PRIORITY_NORMAL
Definition: SDL_thread.h:61
tls
static SDL_TLSID tls
Definition: testthread.c:21
quit
static void quit(int rc)
Definition: testthread.c:27
SDL_strcmp
#define SDL_strcmp
Definition: SDL_dynapi_overrides.h:417
SDL_Init
#define SDL_Init
Definition: SDL_dynapi_overrides.h:54
SDL_ThreadPriority
SDL_ThreadPriority
Definition: SDL_thread.h:59
SDL_ThreadID
#define SDL_ThreadID
Definition: SDL_dynapi_overrides.h:475
SDL_WaitThread
#define SDL_WaitThread
Definition: SDL_dynapi_overrides.h:478
ThreadFunc
int ThreadFunc(void *data)
Definition: testthread.c:48
getprioritystr
static const char * getprioritystr(SDL_ThreadPriority priority)
Definition: testthread.c:34