pthread_cond_sample.c

来自「linux下的多线程的创建及信号同步」· C语言 代码 · 共 40 行

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

pthread_mutex_t mutex_id;
pthread_cond_t  cond_id;
int number;
void* thread_fun(void *nothing)
{
	pthread_mutex_lock(&mutex_id);
	pthread_cond_wait(&cond_id,&mutex_id);
	printf("pthread cond sample\n");
	pthread_mutex_unlock(&mutex_id);

}

void *thread2_fun(void *nothing)
{
	
	pthread_mutex_lock(&mutex_id);
	number=100;
	if(number>=100)
		pthread_cond_signal(&cond_id);
	printf("cond send singal\n");
	sleep(3);
	pthread_mutex_unlock(&mutex_id);

}

int main(int argc,char *argv[])
{
	pthread_mutex_init(&mutex_id,NULL);
	pthread_cond_init(&cond_id,NULL);
	pthread_t pthread1_id,pthread2_id;
	pthread_create(&pthread1_id,NULL,thread_fun,NULL);
	sleep(1);
	pthread_create(&pthread2_id,NULL,thread2_fun,NULL);
	sleep(10);
	return 0;
}