pthread_join监控线程退出的状态

 

#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
void *th_fn(void *arg)
{
    printf("new thread 0\n");
    return (void *)1;
}

void *th_fn1(void *arg)
{
    printf("new thread 1\n");
    pthread_exit((void *)2);
}

void *th_fn2(void *arg)
{
    while(1) {
        printf("new thread 2\n");
        sleep(1);
    }
}

int main()
{
    pthread_t ptid;
    void *tret;
    pthread_create(&ptid, NULL,th_fn ,NULL);
    //获取线程退出的状态
    pthread_join(ptid, &tret);
    printf("code 0 exit id = %d\n", (int)tret);

    pthread_create(&ptid, NULL,th_fn1 ,NULL);
    pthread_join(ptid, &tret);
    printf("code 1 exit id = %d\n", (int)tret);

    pthread_create(&ptid, NULL,th_fn2 ,NULL);
    sleep(3);
    pthread_cancel(ptid);
    pthread_join(ptid, &tret);
    printf("code 2 exit id = %d\n", (int)tret);

    return 1;
}

编译：

gcc pthread_join.c -lpthread -o pthread_join

输出：