testlock.c File Reference

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

Include dependency graph for testlock.c:

Go to the source code of this file.

Functions
static void	SDL_Quit_Wrapper (void)
void	printid (void)
void	terminate (int sig)
void	closemutex (int sig)
int	Run (void *data)
int	main (int argc, char *argv[])

Variables
static SDL_mutex *	mutex = NULL
static SDL_threadID	mainthread
static SDL_Thread *	threads [6]
static SDL_atomic_t	doterminate

Function Documentation

void closemutex

(

int

sig

)

Definition at line 52 of file testlock.c.

References i, mainthread, NULL, SDL_AtomicSet, SDL_DestroyMutex, SDL_Log, SDL_ThreadID, and SDL_WaitThread.

Referenced by Run().

{
    SDL_threadID id = SDL_ThreadID();
    int i;
    SDL_Log("Process %lu:  Cleaning up...\n", id == mainthread ? 0 : id);
    SDL_AtomicSet(&doterminate, 1);
    for (i = 0; i < 6; ++i)
        SDL_WaitThread(threads[i], NULL);
    SDL_DestroyMutex(mutex);
    exit(sig);
}

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 93 of file testlock.c.

References i, mainthread, NULL, printid(), Run(), SDL_AtomicSet, SDL_CreateMutex, SDL_CreateThread, SDL_GetError, SDL_Init, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, SDL_LogError, SDL_LogSetPriority, SDL_Quit_Wrapper(), SDL_snprintf, SDL_ThreadID, and terminate().

{
    int i;
    int maxproc = 6;

    /* 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, "%s\n", SDL_GetError());
        exit(1);
    }
    atexit(SDL_Quit_Wrapper);

    SDL_AtomicSet(&doterminate, 0);

    if ((mutex = SDL_CreateMutex()) == NULL) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create mutex: %s\n", SDL_GetError());
        exit(1);
    }

    mainthread = SDL_ThreadID();
    SDL_Log("Main thread: %lu\n", mainthread);
    atexit(printid);
    for (i = 0; i < maxproc; ++i) {
        char name[64];
        SDL_snprintf(name, sizeof (name), "Worker%d", i);
        if ((threads[i] = SDL_CreateThread(Run, name, NULL)) == NULL)
            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread!\n");
    }
    signal(SIGINT, terminate);
    Run(NULL);

    return (0);                 /* Never reached */
}

void printid

(

void

)

Definition at line 39 of file testlock.c.

References SDL_Log, and SDL_ThreadID.

Referenced by main().

{
    SDL_Log("Process %lu:  exiting\n", SDL_ThreadID());
}

int Run

(

void *

data

)

Definition at line 65 of file testlock.c.

References closemutex(), mainthread, SDL_AtomicGet, SDL_Delay, SDL_GetError, SDL_LockMutex, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LogError, SDL_ThreadID, and SDL_UnlockMutex.

Referenced by main(), and SDL_WinRTInitNonXAMLApp().

{
    if (SDL_ThreadID() == mainthread)
        signal(SIGTERM, closemutex);
    while (!SDL_AtomicGet(&doterminate)) {
        SDL_Log("Process %lu ready to work\n", SDL_ThreadID());
        if (SDL_LockMutex(mutex) < 0) {
            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't lock mutex: %s", SDL_GetError());
            exit(1);
        }
        SDL_Log("Process %lu, working!\n", SDL_ThreadID());
        SDL_Delay(1 * 1000);
        SDL_Log("Process %lu, done!\n", SDL_ThreadID());
        if (SDL_UnlockMutex(mutex) < 0) {
            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't unlock mutex: %s", SDL_GetError());
            exit(1);
        }
        /* If this sleep isn't done, then threads may starve */
        SDL_Delay(10);
    }
    if (SDL_ThreadID() == mainthread && SDL_AtomicGet(&doterminate)) {
        SDL_Log("Process %lu:  raising SIGTERM\n", SDL_ThreadID());
        raise(SIGTERM);
    }
    return (0);
}

static void SDL_Quit_Wrapper ( void  )

static

Definition at line 33 of file testlock.c.

References SDL_Quit.

Referenced by main().

{
    SDL_Quit();
}

void terminate

(

int

sig

)

Definition at line 45 of file testlock.c.

References SDL_AtomicSet.

Referenced by main().

{
    signal(SIGINT, terminate);
    SDL_AtomicSet(&doterminate, 1);
}

Variable Documentation

SDL_atomic_t doterminate

static

Definition at line 26 of file testlock.c.

SDL_threadID mainthread

static

Definition at line 24 of file testlock.c.

Referenced by closemutex(), main(), and Run().

SDL_mutex* mutex = NULL

static

Definition at line 23 of file testlock.c.

Referenced by SDL_CreateMutex(), SDL_DestroyMutex(), SDL_Generic_GetTLSData(), and SDL_ThreadID().

SDL_Thread* threads[6]

static

Definition at line 25 of file testlock.c.

Referenced by main().