Linux多线程实例练习 - pthread_exit() 与 pthread_join()

Linux多线程实例练习 - pthread_exit 与 pthread_join

pthread_exit()：终止当前线程

void pthread_exit(void* retval);

pthread_join()：阻塞当前的线程，直到另外一个线程运行结束

int pthread_join(pthread_t thread, void **retval);

 

1、代码　　xx_pthread_exit.c

 1 #include <pthread.h>

 2 #include <stdio.h>

 3 #include <unistd.h>

 4 

 5 #define debug_Msg(fmt, arg...)\

 6     do{\

 7         printf("%s %d : ", __FILE__, __LINE__);\                                                     

 8         printf(fmt, ##arg);\

 9     }while(0)

10 

11 void * doPrint(void *arg)

12 {

13     debug_Msg("%s\n", (char*)arg);

14     char * p = "thread is over";

15  pthread_exit(p);

16 }

17 int main()

18 {

19     pthread_t pid;

20     char * pt = "hello pthread";

21     pthread_create(&pid, NULL, doPrint, pt);

22     void * p = NULL;

23     pthread_join(pid, &p);

24     debug_Msg("return of thread : [%s]\n", (char*)p);

25     

26     return 0;

27 }

2、CentOS 下编译通过

g++ -g -c -o xx_pthread_exit.o xx_pthread_exit.c 

g++ -g -o xx_pthread_exit xx_pthread_exit.o -lpthread

3、运行结果

$ ./xx_pthread_exit 

xx_pthread_exit.c 13 : hello pthread

xx_pthread_exit.c 24 : return of thread : [thread is over]