llist_test_threads.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.
 *
 ********************************************************
 * llist_test_threads.c --
 * 
 * Exercizer program using multi-threaded access to linked list 
 */
#include "llist_threads.h"
#include <stdio.h>
#include <stdlib.h>

#define MAXDATALEN 80

void *build_list (void *);

llist_t ll; 
int maxlen=MAXDATALEN;

extern int	main(void) 
{ 
	pthread_t       thread1, thread2;
	int             smallint1 = 2;
	int             smallint2 = 3;
	
	llist_init(&ll);
	
	pthread_create(&thread1, NULL, build_list, (void *) &smallint1); 
	
	pthread_create(&thread2, NULL, build_list, (void *) &smallint2); 
	
	pthread_join(thread1, NULL);
	pthread_join(thread2, NULL);
	
	llist_show(&ll);
	
	return 0;
}


/*
 * build_list -- makes entries to the linked list using multiples of the input arg
 */
void *build_list (void *arg) 
{
	int *factorp = (int *)arg;
	unsigned int multiple;
	char *stringp;
	int i;
	
	for (i = 0; i < 1000; i++) 
	{
		multiple = (*factorp) * i;
		stringp = malloc(maxlen);
		if (stringp == NULL) 
			perror("malloc");
		sprintf (stringp, "%d is a multiple of %d", multiple, *factorp);
		llist_insert_data(multiple, stringp, &ll);
	}
	return NULL;
}