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130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
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Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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/* Simple test of the SDL threading code */
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include "SDL.h"
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static SDL_TLSID tls;
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static int alive = 0;
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static int testprio = 0;
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/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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static void
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quit(int rc)
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{
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SDL_Quit();
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exit(rc);
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}
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static const char *
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getprioritystr(SDL_ThreadPriority priority)
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{
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switch(priority)
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{
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case SDL_THREAD_PRIORITY_LOW: return "SDL_THREAD_PRIORITY_LOW";
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case SDL_THREAD_PRIORITY_NORMAL: return "SDL_THREAD_PRIORITY_NORMAL";
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case SDL_THREAD_PRIORITY_HIGH: return "SDL_THREAD_PRIORITY_HIGH";
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case SDL_THREAD_PRIORITY_TIME_CRITICAL: return "SDL_THREAD_PRIORITY_TIME_CRITICAL";
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}
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return "???";
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}
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int SDLCALL
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ThreadFunc(void *data)
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{
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SDL_ThreadPriority prio = SDL_THREAD_PRIORITY_NORMAL;
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SDL_TLSSet(tls, "baby thread", NULL);
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SDL_Log("Started thread %s: My thread id is %lu, thread data = %s\n",
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(char *) data, SDL_ThreadID(), (const char *)SDL_TLSGet(tls));
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while (alive) {
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SDL_Log("Thread '%s' is alive!\n", (char *) data);
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if (testprio) {
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SDL_Log("SDL_SetThreadPriority(%s):%d\n", getprioritystr(prio), SDL_SetThreadPriority(prio));
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if (++prio > SDL_THREAD_PRIORITY_TIME_CRITICAL)
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prio = SDL_THREAD_PRIORITY_LOW;
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}
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SDL_Delay(1 * 1000);
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}
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SDL_Log("Thread '%s' exiting!\n", (char *) data);
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return (0);
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}
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static void
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killed(int sig)
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{
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SDL_Log("Killed with SIGTERM, waiting 5 seconds to exit\n");
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SDL_Delay(5 * 1000);
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alive = 0;
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quit(0);
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}
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int
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main(int argc, char *argv[])
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{
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int arg = 1;
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SDL_Thread *thread;
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/* Enable standard application logging */
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
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/* Load the SDL library */
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if (SDL_Init(0) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return (1);
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}
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while (argv[arg] && *argv[arg] == '-') {
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if (SDL_strcmp(argv[arg], "--prio") == 0) {
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testprio = 1;
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}
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++arg;
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}
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tls = SDL_TLSCreate();
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SDL_assert(tls);
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SDL_TLSSet(tls, "main thread", NULL);
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SDL_Log("Main thread data initially: %s\n", (const char *)SDL_TLSGet(tls));
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alive = 1;
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thread = SDL_CreateThread(ThreadFunc, "One", "#1");
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if (thread == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
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quit(1);
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}
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SDL_Delay(5 * 1000);
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SDL_Log("Waiting for thread #1\n");
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alive = 0;
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SDL_WaitThread(thread, NULL);
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SDL_Log("Main thread data finally: %s\n", (const char *)SDL_TLSGet(tls));
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alive = 1;
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signal(SIGTERM, killed);
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thread = SDL_CreateThread(ThreadFunc, "Two", "#2");
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if (thread == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
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quit(1);
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}
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raise(SIGTERM);
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SDL_Quit(); /* Never reached */
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return (0); /* Never reached */
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}
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