多线程：线程标示（id）-thread_id.c

#include            /*printf()*/

#include          /*pthread_create(),pthread_self()*/

#include           /*getpid(),sleep()*/

 

void *create(void *arg)       /*无参函数，arg好多余*/

{

    printf("New thread .... \n");

    printf("This thread's id is %u  \n", (unsigned int)pthread_self());/*获取并打印线程*/

    printf("The process pid is %d  \n",getpid());  /*获取进程id(应该和main中获取的一样)*/

    return (void *)0;

}

 

int main(int argc,char *argv[])  /*无参函数，argc argv[]好多余*/

{

    pthread_t tid;

    int error;

 

    printf("Main thread is starting ... \n");

 

    error = pthread_create(&tid, NULL, create, NULL);/*创建线程（线程处于就绪态）*/

 

    if(error)

    {

        printf("thread is not created ... \n");

        return -1;

    }

    printf("The main process's pid is %d  \n",getpid());  /*获取进程*/

    sleep(1);                                           /*主进程睡眠，让线程运行*/

    return 0;                                     /*应该有一个pthread_join()效果更好*/

}

运行结果：

tu

 

 

从运行结果看，在主进程和线程中获取的进程id都是主进程id；获取并打印线程id成功；