Atlas - testthread.c
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[FILE BEGIN]
1/*
2  Copyright (C) 1997-2018 Sam Lantinga <[email protected]>
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
21static SDL_TLSID tls;
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 *
34getprioritystr(SDL_ThreadPriority priority)
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
48ThreadFunc(void *data)
49{
50    SDL_ThreadPriority prio = SDL_THREAD_PRIORITY_NORMAL;
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));
60            if (++prio > SDL_THREAD_PRIORITY_TIME_CRITICAL)
61                prio = SDL_THREAD_PRIORITY_LOW;
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 */
86    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
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}
131
[FILE END]
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