pthread_mutex_sample.c

linux下的多线程的创建及信号同步

#include <pthread.h>
#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include <semaphore.h>

int number;
pthread_mutex_t  mutex_id;
void* thread_fun(void *arg)
{
	int i=0;
	printf("count=%d\n",*((int*)arg));
	pthread_mutex_lock(&mutex_id);
	for(i=0;i<5;i++)
	{
		number++;
		printf("number=%d\n",number);
		sleep(1);
	}
	pthread_mutex_unlock(&mutex_id);
}



int main(int argc,char *argv[])
{
	int i=0;
	int count=99;
	pthread_mutex_init(&mutex_id,NULL);
	pthread_t thread_id,thread2_id;
	pthread_create(&thread_id,NULL,thread_fun,&count);
	sleep(1);
	pthread_mutex_lock(&mutex_id);
	for(i=0;i<5;i++)
	{
		number--;
		printf("number=%d\n",number);
		sleep(1);
	}
	pthread_mutex_unlock(&mutex_id);
	printf("main,,,\n");
	pthread_mutex_destroy(&mutex_id);
	return 0;
}