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

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

 #define debug_Msg(fmt, arg...)\
     do{\
         printf("%s %d : ", __FILE__, __LINE__);\
         printf(fmt, ##arg);\
     }while()

 void * doPrint(void *arg)
 {
     debug_Msg("%s\n", (char*)arg);
     char * p = "thread is over";
     pthread_exit(p);
 }
 int main()
 {
     pthread_t pid;
     char * pt = "hello pthread";
     pthread_create(&pid, NULL, doPrint, pt);
     void * p = NULL;
     pthread_join(pid, &p);
     debug_Msg("return of thread : [%s]\n", (char*)p);

     return ;
 }

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  : hello pthread
xx_pthread_exit.c  : return of thread : [thread is over]