Linux多線程實例練習 - pthread_exit() 與 pthread_join()

Linux多線程實例練習 - pthread_exit 與 pthread_join

pthread_exit()：終止當前線程

void pthread_exit(void* retval);

pthread_join()：阻塞當前的線程，直到另外一個線程運行結束

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

 

1、代碼　　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(0)

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 0;
}

2、CentOS 下編譯通過

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

3、運行結果

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