testthread.c
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/*
Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely.
*/
/* Simple test of the SDL threading code */
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include "SDL.h"
static SDL_TLSID tls;
static int alive = 0;
/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
quit(int rc)
{
SDL_Quit();
exit(rc);
}
int SDLCALL
ThreadFunc(void *data)
{
SDL_TLSSet(tls, "baby thread", NULL);
SDL_Log("Started thread %s: My thread id is %lu, thread data = %s\n",
(char *) data, SDL_ThreadID(), (const char *)SDL_TLSGet(tls));
while (alive) {
SDL_Log("Thread '%s' is alive!\n", (char *) data);
SDL_Delay(1 * 1000);
}
SDL_Log("Thread '%s' exiting!\n", (char *) data);
return (0);
}
static void
killed(int sig)
{
SDL_Log("Killed with SIGTERM, waiting 5 seconds to exit\n");
SDL_Delay(5 * 1000);
alive = 0;
quit(0);
}
int
main(int argc, char *argv[])
{
SDL_Thread *thread;
/* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
/* Load the SDL library */
if (SDL_Init(0) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
return (1);
}
tls = SDL_TLSCreate();
SDL_assert(tls);
SDL_TLSSet(tls, "main thread", NULL);
SDL_Log("Main thread data initially: %s\n", (const char *)SDL_TLSGet(tls));
alive = 1;
thread = SDL_CreateThread(ThreadFunc, "One", "#1");
if (thread == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
quit(1);
}
SDL_Delay(5 * 1000);
SDL_Log("Waiting for thread #1\n");
alive = 0;
SDL_WaitThread(thread, NULL);
SDL_Log("Main thread data finally: %s\n", (const char *)SDL_TLSGet(tls));
alive = 1;
signal(SIGTERM, killed);
thread = SDL_CreateThread(ThreadFunc, "Two", "#2");
if (thread == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
quit(1);
}
raise(SIGTERM);
SDL_Quit(); /* Never reached */
return (0); /* Never reached */
}
SDL_TLSSet
#define SDL_TLSSet
Definition: SDL_dynapi_overrides.h:486
SDL_ThreadID
#define SDL_ThreadID
Definition: SDL_dynapi_overrides.h:479
ThreadFunc
int ThreadFunc(void *data)
Definition: testthread.c:33
SDL_GetError
#define SDL_GetError
Definition: SDL_dynapi_overrides.h:119
killed
static void killed(int sig)
Definition: testthread.c:47
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1967
main
int main(int argc, char *argv[])
Definition: testthread.c:56
SDL_TLSID
unsigned int SDL_TLSID
Definition: SDL_thread.h:52
SDL_LogError
#define SDL_LogError
Definition: SDL_dynapi_overrides.h:42
SDL_Log
#define SDL_Log
Definition: SDL_dynapi_overrides.h:37
SDL_Quit
#define SDL_Quit
Definition: SDL_dynapi_overrides.h:64
SDL_TLSCreate
#define SDL_TLSCreate
Definition: SDL_dynapi_overrides.h:484
SDL_LOG_PRIORITY_INFO
Definition: SDL_log.h:106
alive
static int alive
Definition: testthread.c:22
SDL_CreateThread
#define SDL_CreateThread
Definition: SDL_dynapi_overrides.h:47
SDL_Delay
#define SDL_Delay
Definition: SDL_dynapi_overrides.h:490
SDL_TLSGet
#define SDL_TLSGet
Definition: SDL_dynapi_overrides.h:485
SDL_assert
#define SDL_assert(condition)
Definition: SDL_assert.h:167
SDL_LogSetPriority
#define SDL_LogSetPriority
Definition: SDL_dynapi_overrides.h:242
NULL
#define NULL
Definition: begin_code.h:143
tls
static SDL_TLSID tls
Definition: testthread.c:21
quit
static void quit(int rc)
Definition: testthread.c:26
SDL_Thread
Definition: SDL_thread_c.h:54
SDL_Init
#define SDL_Init
Definition: SDL_dynapi_overrides.h:60
SDL.h
SDLCALL
#define SDLCALL
Definition: SDL_internal.h:31
SDL_LOG_CATEGORY_APPLICATION
Definition: SDL_log.h:66
SDL_WaitThread
#define SDL_WaitThread
Definition: SDL_dynapi_overrides.h:482