test/testsem.c
author Sam Lantinga <slouken@libsdl.org>
Tue, 09 May 2006 07:26:58 +0000
changeset 1790 828a17e05192
parent 1769 290b5baf2fca
child 1662 782fd950bd46
child 1895 c121d94672cb
child 5105 99acf3d856cb
permissions -rw-r--r--
Date: Mon, 8 May 2006 14:19:30 -0700
From: Bob Ippolito
Subject: SDL trunk (r2346) and Mac OS X

The current state of the trunk doesn't quite compile on Mac OS X,
I've attached a series of patches that gets it to compile and kills a
few warnings.

sdl-trunk-r2346-dlcompat-warnings.diff:
The dlcompat thing is just loaded with incorrect type signatures ..
some of them have changed since 10.2 and others are just flat wrong.
This puts it in sync with the latest headers. People on 10.2 will get
the warnings instead of people with new kits.
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/* Simple test of the SDL semaphore 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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#include "SDL_thread.h"
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#define NUM_THREADS 10
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static SDL_sem *sem;
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int alive = 1;
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int SDLCALL ThreadFunc(void *data)
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{
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	int threadnum = (int)(uintptr_t)data;
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	while ( alive ) {
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		SDL_SemWait(sem);
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		fprintf(stderr, "Thread number %d has got the semaphore (value = %d)!\n", threadnum, SDL_SemValue(sem));
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		SDL_Delay(200);
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		SDL_SemPost(sem);
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		fprintf(stderr, "Thread number %d has released the semaphore (value = %d)!\n", threadnum, SDL_SemValue(sem));
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		SDL_Delay(1); /* For the scheduler */
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	}
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	printf("Thread number %d exiting.\n", threadnum);
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	return 0;
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}
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static void killed(int sig)
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{
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	alive = 0;
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}
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int main(int argc, char **argv)
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{
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	SDL_Thread *threads[NUM_THREADS];
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	uintptr_t i;
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	int init_sem;
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	if(argc < 2) {
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		fprintf(stderr,"Usage: %s init_value\n", argv[0]);
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		return(1);
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	}
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	/* Load the SDL library */
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	if ( SDL_Init(0) < 0 ) {
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		fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
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		return(1);
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	}
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	signal(SIGTERM, killed);
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	signal(SIGINT, killed);
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	init_sem = atoi(argv[1]);
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	sem = SDL_CreateSemaphore(init_sem);
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	printf("Running %d threads, semaphore value = %d\n", NUM_THREADS, init_sem);
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	/* Create all the threads */
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	for( i = 0; i < NUM_THREADS; ++i ) {
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		threads[i] = SDL_CreateThread(ThreadFunc, (void*)i);
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	}
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	/* Wait 10 seconds */
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	SDL_Delay(10 * 1000);
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	/* Wait for all threads to finish */
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	printf("Waiting for threads to finish\n");
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	alive = 0;
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	for( i = 0; i < NUM_THREADS; ++i ) {
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		SDL_WaitThread(threads[i], NULL);
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	}
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	printf("Finished waiting for threads\n");
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	SDL_DestroySemaphore(sem);
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	SDL_Quit();
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	return(0);
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}