线程pthread_mutex_init()锁的应用

/* ************************************************************************
 *       Filename:  m_mutex.c
 *    Description:  
 *        Version:  1.0
 *        Created:  2011年04月22日 17时49分29秒
 *       Revision:  none
 *       Compiler:  gcc
 *         Author:  wenhao (wh), hnrain1004@gmail.com
 *        Company:  sunplusapp
 * ************************************************************************/


#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

void *function(void *arg);
pthread_mutex_t mutex;
int counter = 0;
int main(int argc, char *argv[])
{
	int rc1,rc2;
	
	char *str1="wenhaoll";
	char *str2="linglong";
	pthread_t thread1,thread2;

	pthread_mutex_init(&mutex,NULL);
	if((rc1 = pthread_create(&thread1,NULL,function,str1)))
	{
		fprintf(stdout,"thread 1 create failed: %d\n",rc1);
	}

	if(rc2=pthread_create(&thread2,NULL,function,str2))
	{
		fprintf(stdout,"thread 2 create failed: %d\n",rc2);
	}

	pthread_join(thread1,NULL);
	pthread_join(thread2,NULL);
	return 0;
}

void *function(void *arg)
{
	char *m;
	m = (char *)arg;
	pthread_mutex_lock(&mutex);
	while(*m != '\0')
	{
		printf("%c",*m);
		fflush(stdout);
		m++;
		sleep(1);
	}
	printf("\n");
	pthread_mutex_unlock(&mutex);
}