testthread.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include "SDL.h"

Include dependency graph for testthread.c:

Go to the source code of this file.

Functions
static void	quit (int rc)
static const char *	getprioritystr (SDL_ThreadPriority priority)
int	ThreadFunc (void *data)
static void	killed (int sig)
int	main (int argc, char *argv[])

Variables
static SDL_TLSID	tls
static int	alive = 0
static int	testprio = 0

Function Documentation

static const char* getprioritystr ( SDL_ThreadPriority  priority )

static

Definition at line 34 of file testthread.c.

References SDL_THREAD_PRIORITY_HIGH, SDL_THREAD_PRIORITY_LOW, SDL_THREAD_PRIORITY_NORMAL, and SDL_THREAD_PRIORITY_TIME_CRITICAL.

Referenced by ThreadFunc().

{
    switch(priority)
    {
    case SDL_THREAD_PRIORITY_LOW: return "SDL_THREAD_PRIORITY_LOW";
    case SDL_THREAD_PRIORITY_NORMAL: return "SDL_THREAD_PRIORITY_NORMAL";
    case SDL_THREAD_PRIORITY_HIGH: return "SDL_THREAD_PRIORITY_HIGH";
    case SDL_THREAD_PRIORITY_TIME_CRITICAL: return "SDL_THREAD_PRIORITY_TIME_CRITICAL";
    }

    return "???";
}

static void killed ( int  sig )

static

Definition at line 71 of file testthread.c.

References alive, quit(), SDL_Delay, and SDL_Log.

Referenced by main().

{
    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[]
	)

Definition at line 80 of file testthread.c.

References alive, killed(), NULL, quit(), SDL_assert, SDL_CreateThread, SDL_Delay, SDL_GetError, SDL_Init, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, SDL_LogError, SDL_LogSetPriority, SDL_Quit, SDL_strcmp, SDL_TLSCreate, SDL_TLSGet, SDL_TLSSet, SDL_WaitThread, testprio, ThreadFunc(), and tls.

{
    int arg = 1;
    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);
    }

    while (argv[arg] && *argv[arg] == '-') {
        if (SDL_strcmp(argv[arg], "--prio") == 0) {
            testprio = 1;
        }
        ++arg;
    }

    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 */
}

static void quit ( int  rc )

static

Definition at line 27 of file testthread.c.

References SDL_Quit.

{
    SDL_Quit();
    exit(rc);
}

int ThreadFunc

(

void *

data

)

Definition at line 48 of file testthread.c.

References alive, getprioritystr(), NULL, SDL_Delay, SDL_Log, SDL_SetThreadPriority, SDL_THREAD_PRIORITY_LOW, SDL_THREAD_PRIORITY_NORMAL, SDL_THREAD_PRIORITY_TIME_CRITICAL, SDL_ThreadID, SDL_TLSGet, SDL_TLSSet, testprio, and tls.

{
    SDL_ThreadPriority prio = SDL_THREAD_PRIORITY_NORMAL;

    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);

        if (testprio) {
            SDL_Log("SDL_SetThreadPriority(%s):%d\n", getprioritystr(prio), SDL_SetThreadPriority(prio));
            if (++prio > SDL_THREAD_PRIORITY_TIME_CRITICAL)
                prio = SDL_THREAD_PRIORITY_LOW;
        }

        SDL_Delay(1 * 1000);
    }
    SDL_Log("Thread '%s' exiting!\n", (char *) data);
    return (0);
}

Variable Documentation

int alive = 0

static

Definition at line 22 of file testthread.c.

int testprio = 0

static

Definition at line 23 of file testthread.c.

Referenced by main(), and ThreadFunc().

SDL_TLSID tls

static

Definition at line 21 of file testthread.c.

Referenced by main(), and ThreadFunc().