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#include <pthread.h>
#include <unistd.h>
#include <stdio.h>
/* 线程控制块 */
static pthread_t tid1;
static pthread_t tid2;
/* 函数返回值检查 */
static void check_result(char* str,int result)
{
if (0 == result)
{
printf("%s successfully!\n",str);
}
else
{
printf("%s failed! error code is %d\n",str,result);
}
}
/* 线程1入口函数 */
static void* thread1_entry(void* parameter)
{
int i;
for (i = 0;i < 3;i++) /* 循环打印3次信息 */
{
printf("thread1 run count: %d\n",i);
sleep(2); /* 休眠2秒 */
}
printf("thread1 exited!\n");
return NULL;
}
/* 线程2入口函数*/
static void* thread2_entry(void* parameter)
{
int count = 0;
void* thread1_return_value;
/* 阻塞等待线程1运行结束 */
pthread_join(tid1, NULL);
/* 线程2打印信息开始输出 */
while(1)
{
/* 打印线程计数值输出 */
printf("thread2 run count: %d\n",count ++);
sleep(2); /* 休眠2秒 */
}
return NULL;
}
/* 用户应用入口 */
int application_init()
{
int result;
/* 创建线程1,属性为默认值,分离状态为默认值joinable,
* 入口函数是thread1_entry,入口函数参数为NULL */
result = pthread_create(&tid1,NULL,thread1_entry,NULL);
check_result("thread1 created",result);
/* 创建线程2,属性为默认值,分离状态为默认值joinable,
* 入口函数是thread2_entry,入口函数参数为NULL */
result = pthread_create(&tid2,NULL,thread2_entry,NULL);
check_result("thread2 created",result);
return 0;
}
int main()
{
int i ;
application_init();
i=10;
do{
sleep(1);
}while(i--);
}
运行结果:
-bash-3.2$ gcc join.c -pthread -o app
-bash-3.2$ ./app
thread1 created successfully!
thread2 created successfully!
thread1 run count: 0
thread1 run count: 1
thread1 run count: 2
thread1 exited!
thread2 run count: 0
thread2 run count: 1
thread2 run count: 2