mattr.c

linux下多线程程序设计,包括signals,mutex,simple_once

/********************************************************
 * An example source module to accompany...
 *
 * "Using POSIX Threads: Programming with Pthreads"
 *     by Brad nichols, Dick Buttlar, Jackie Farrell
 *     O'Reilly & Associates, Inc.
 *
 ********************************************************
 * mattr.c -- 
 *
 * Practice creating and modifying attributes
 */


#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>

#include <pthread.h>

#define MIN_REQ_SSIZE 10*8192

void *r1(void *not_used)
{
	int i;
	
	for (i=0; i<10000; i++) 
	{
		if (i%21 == 0) 
			printf(".");
	} 
	printf("\n");
	return(NULL);
}


extern int	main(void)
{
	int rtn;
	size_t def_stack_size;
	pthread_t thread;
	pthread_attr_t custom_attr;
	
	pthread_attr_init(&custom_attr);
	
	/*
	pthread_attr_setdetachstate(&custom_attr,
	PTHREAD_CREATE_DETACHED);
	*/
	pthread_attr_getstacksize(&custom_attr, &def_stack_size);
	if (def_stack_size < MIN_REQ_SSIZE) 
	{
		pthread_attr_setstacksize(&custom_attr, MIN_REQ_SSIZE);
	}
	pthread_create(&thread, &custom_attr, r1, NULL);
	
	if ((rtn = pthread_join(thread, NULL)) != 0)
		fprintf(stderr,"pthread_join: %s\n",strerror(rtn)), exit(1);
	
	return 0;
}