torturethread.c File Reference

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

Include dependency graph for torturethread.c:

Go to the source code of this file.

Macros
#define	NUMTHREADS   10

Functions
static void	quit (int rc)
int	SubThreadFunc (void *data)
int	ThreadFunc (void *data)
int	main (int argc, char *argv[])

Variables
static SDL_atomic_t	time_for_threads_to_die [NUMTHREADS]

Macro Definition Documentation

#define NUMTHREADS   10

Definition at line 22 of file torturethread.c.

Referenced by main(), and ThreadFunc().

Function Documentation

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

Definition at line 77 of file torturethread.c.

References i, NULL, NUMTHREADS, quit(), SDL_AtomicSet, SDL_CreateThread, SDL_GetError, SDL_Init, SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, SDL_LogError, SDL_LogSetPriority, SDL_Quit, SDL_snprintf, SDL_WaitThread, ThreadFunc(), and threads.

{
    SDL_Thread *threads[NUMTHREADS];
    int i;

    /* 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);
    }

    signal(SIGSEGV, SIG_DFL);
    for (i = 0; i < NUMTHREADS; i++) {
        char name[64];
        SDL_snprintf(name, sizeof (name), "Parent%d", i);
        SDL_AtomicSet(&time_for_threads_to_die[i], 0);
        threads[i] = SDL_CreateThread(ThreadFunc, name, (void*) (uintptr_t) i);

        if (threads[i] == NULL) {
            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
            quit(1);
        }
    }

    for (i = 0; i < NUMTHREADS; i++) {
        SDL_AtomicSet(&time_for_threads_to_die[i], 1);
    }

    for (i = 0; i < NUMTHREADS; i++) {
        SDL_WaitThread(threads[i], NULL);
    }
    SDL_Quit();
    return (0);
}

static void quit ( int  rc )

static

Definition at line 28 of file torturethread.c.

References SDL_Quit.

{
    SDL_Quit();
    exit(rc);
}

int SubThreadFunc

(

void *

data

)

Definition at line 35 of file torturethread.c.

Referenced by ThreadFunc().

{
    while (!*(int volatile *) data) {
        ;                       /* SDL_Delay(10); *//* do nothing */
    }
    return 0;
}

int ThreadFunc

(

void *

data

)

Definition at line 44 of file torturethread.c.

References i, NULL, NUMTHREADS, SDL_AtomicGet, SDL_CreateThread, SDL_Log, SDL_snprintf, SDL_WaitThread, and SubThreadFunc().

{
    SDL_Thread *sub_threads[NUMTHREADS];
    int flags[NUMTHREADS];
    int i;
    int tid = (int) (uintptr_t) data;

    SDL_Log("Creating Thread %d\n", tid);

    for (i = 0; i < NUMTHREADS; i++) {
        char name[64];
        SDL_snprintf(name, sizeof (name), "Child%d_%d", tid, i);
        flags[i] = 0;
        sub_threads[i] = SDL_CreateThread(SubThreadFunc, name, &flags[i]);
    }

    SDL_Log("Thread '%d' waiting for signal\n", tid);
    while (SDL_AtomicGet(&time_for_threads_to_die[tid]) != 1) {
        ;                       /* do nothing */
    }

    SDL_Log("Thread '%d' sending signals to subthreads\n", tid);
    for (i = 0; i < NUMTHREADS; i++) {
        flags[i] = 1;
        SDL_WaitThread(sub_threads[i], NULL);
    }

    SDL_Log("Thread '%d' exiting!\n", tid);

    return 0;
}

Variable Documentation

SDL_atomic_t time_for_threads_to_die[NUMTHREADS]

static

Definition at line 24 of file torturethread.c.