连接线程

#include"string.h"
#include"stdio.h"
#include"stdlib.h"
#include"pthread.h"
void *thread_fun1(void *arg)
{
  printf("i am thread 1\n");
  return (void *)1;
}

void *thread_fun2(void *arg)
{
  printf("i am thread 2\n");
  pthread_detach(pthread_self());//用于分离线程，成功返回0，失败返回错误码
  pthread_exit((void *)2);
}

int main()
{
  int err1,err2;
  pthread_t tid1, tid2;
  void *rval1, *rval2;

  err1 = pthread_create(&tid1, NULL, thread_fun1, NULL);
  err2 = pthread_create(&tid2, NULL, thread_fun2, NULL);

  if(err1 || err2)
  {
     printf("create new thread failed\n");
     return 0;
  }
  printf("i am main thread\n");

  printf("join1 rval is %d\n",pthread_join(tid1, &rval1));
  printf("join2 rval is %d\n",pthread_join(tid2, &rval2));//连接成功返回0，否则返回错误码
  
  printf("thread1 err code is %d\n",(int *)rval1);
  printf("thread2 err code id %d\n",(int *)rval2);
  printf("i am main thread\n");
  return 0;
}

i am main thread
i am thread 2
i am thread 1
join1 rval is 0    //成功
join2 rval is 22     //失败，已经分离了，连接的话就会错误
thread1 err code is 1       
thread2 err code id -1216909312
i am main thread

 

。