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

void pthread_exit(void* retval);

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

 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 }

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

$ ./xx_pthread_exit 
xx_pthread_exit.c 13 : hello pthread
xx_pthread_exit.c 24 : return of thread : [thread is over]