多线程实例 同步锁

多线程实例 :lp.c

#include <pthread.h>
#include
<stdio.h>
#include
<sys/time.h>
#include
<string.h>
#define MAX 10

pthread_t thread[
2];
pthread_mutex_t mut;
int number=0, i;

void *thread1()
{
printf (
"thread1 : I'm thread 1\n");
for (i = 0; i < MAX; i++)
{
printf(
"thread1 : number = %d\n",number);
pthread_mutex_lock(
&mut);
number
++;
pthread_mutex_unlock(
&mut);
sleep(
2);
}
printf(
"thread1 :主函数在等我完成任务吗?\n");

pthread_exit(NULL);

}

void *thread2()
{
printf(
"thread2 : I'm thread 2\n");
for (i = 0; i < MAX; i++)
{
printf(
"thread2 : number = %d\n",number);
pthread_mutex_lock(
&mut);
number
++;
pthread_mutex_unlock(
&mut);
sleep(
3);
}
printf(
"thread2 :主函数在等我完成任务吗?\n");
pthread_exit(NULL);
}


void thread_create(void)
{
int temp;
memset(
&thread, 0, sizeof(thread)); //comment1
//创建线程
if((temp = pthread_create(&thread[0], NULL, thread1, NULL)) != 0) //comment2
printf("线程1创建失败!\n");
else
printf(
"线程1被创建\n");
if((temp = pthread_create(&thread[1], NULL, thread2, NULL)) != 0) //comment3
printf("线程2创建失败");
else
printf(
"线程2被创建\n");
}

void thread_wait(void)
{
//等待线程结束
if(thread[0] !=0) { //comment4
pthread_join(thread[0],NULL);
printf(
"线程1已经结束\n");
}
if(thread[1] !=0) { //comment5
pthread_join(thread[1],NULL);
printf(
"线程2已经结束\n");
}
}

int main()
{
//用默认属性初始化互斥锁
pthread_mutex_init(&mut,NULL);
printf(
"我是主函数哦,我正在创建线程,呵呵\n");
thread_create();
printf(
"我是主函数哦,我正在等待线程完成任务阿,呵呵\n");
thread_wait();
return 0;
}

  

编译 :

       gcc -lpthread -o thread_example lp.c

你可能感兴趣的:(多线程)