获得已终止线程的退出码

#include<stdio.h>
#include<pthread.h>
#include<string.h>
#include<sys/types.h>
#include<unistd.h>
void printids(const char *s){
pid_t pid;
pthread_t tid;
pid = getpid();
tid = pthread_self();
printf("%s pid %u tid %u (0x%x)\n",s,(unsigned int)pid,(unsigned int)tid,(unsigned
int)tid);
}
void *thr_fn1(void *arg)
{
        printids("new pthread:");
        printf("thread 1 return \n");
        return ((void *)1);
}
int main(void)
{
        int err=0;
        pthread_t tid1,tid2;
        void *tret;
        err=pthread_create(&tid1,NULL,thr_fn1,NULL);
        if(err!=0)
        {
                printf("can't create\n");
        }
        err=pthread_join(tid1,&tret);
        if(err!=0)
        printf("can't join with pthread 1",strerror(err));
        printf("pthread exit code %d\n",(int)tret);
        printids("main pthread:");
        //getchar();
        sleep(1);
        return 0;
}

输出：

[omcbo@DGSERNMC111 Privacy]$ ./pthead
new pthread: pid 23532 tid 3078073200 (0xb777ab70)
thread 1 return
pthread exit code 1
main pthread: pid 23532 tid 3078076624 (0xb777b8d0)

 

由于pthread库不是Linux系统默认的库，连接时需要使用库libpthread.a,所以在使用pthread_create创建线程时，在编译中要加-lpthread参数:
gcc -o pthread -lpthread pthread.c