Unix 用Pthread_create 函数编程 小例子

参考https://blog.youkuaiyun.com/wallwind/article/details/6989513， 试试自己写个程序。

功能： 创建一个子线程，比较一下主线程和子线程所在的进程ID和个子的线程ID。

代码部分：

 test_pthread.c
#include <stdio.h>
#include <pthread.h>
pthread_t new_tid;
void printThread(const char* s)
{
    pid_t pid;
    pthread_t tid;
    pid = getpid();
    tid = pthread_self();
    printf("%s, pid is %lu, tid is %x \n", s, (unsigned long)pid, (unsigned long)tid);
}
void* entranThr(void* arg)
{
    printf("create a children thread\n");
    printThread("children thread");
}
void main()
{

    int err = 0;
    err = pthread_create(&new_tid, NULL, entranThr, NULL);
    pid_t pid;
    pthread_t tid;
    pid = getpid();
    tid = pthread_self();
    printf("main thread pid is %lu, tid is %x,new_tid is %x\n", (unsigned long)pid, (unsigned long)tid, (unsigned long)new_tid);
    sleep(5);
}

编译： cc test_pthread.c -lpthread

运行结果：

 ./a.out
main thread pid is 17603, tid is b77ac6c0,new_tid is b77abb70
create a children thread
children thread, pid is 17603, tid is b77abb70

总结：进程17603 下有两个线程，主线程0xb77ac6c0，子线程0xb77abb70.