Linux多线程编程之创建两个子线程,分别执行子线程函数(注意编译方式)

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

//Linux多线程编程之创建两个子线程,分别执行子线程函数(注意编译方式)

/*
int pthread_join(pthread_t thread, void **retval);
int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg);
void pthread_exit(void *retval);
pthread_t pthread_self(void);
*/

/*
linux中线程属于第三方库开发
安装线程库man手册：
sudo  apt-get install   manpages manpages-dev
sudo  apt-get install   manpages-posix-dev
编译：
gcc  -o   bin   src.c   -lpthread  //指定线程库链接
*/

//线程1执行函数
void *pthread_1(void *arg)
{
printf("pthread 1 run...\n");
int i =2;
while(i--){
printf("thread1 i =%d\n",i);
sleep(1);
}
pthread_exit(NULL);
return NULL;
}

//线程2执行函数
void  *pthread_2(void *arg)
{
printf("pthread 2 run..\n");

sleep(3);
printf("pthread 2 exit\n");

pthread_exit(NULL);
return NULL;
}

int main(void)
{
//打印线程id号
printf("main thread tid = 0x%x\n",pthread_self());

//创建子线程1
pthread_t tid1;//定义子线程标识符
pthread_create(&tid1,NULL,pthread_1,NULL);//pthread_1即线程执行函数

//创建子线程2
pthread_t tid2;//定义子线程标识符
pthread_create(&tid2,NULL,pthread_2,NULL);//pthread_2即线程执行函数

//阻塞等待子线程结束，回收子线程结束8kb物理内存
pthread_join(tid1,NULL);
pthread_join(tid2,NULL);
printf("child pthread exit\n");

//sleep(5);
printf("main pthread exit\n");
pthread_exit(NULL);  //结束主线程

return 0;
}

//编译：gcc 38_pthread.c -lpthread
/*
$ ./a.out
main thread tid = 0xb75c26c0
pthread 2 run..
pthread 1 run...
thread1 i =1
thread1 i =0
pthread 2 exit
child pthread exit
main pthread exit
*/