/*这份代码经源码格式软件格式化过     yang_hx@neusoft.com      *///非分离线程使用join函数例子：#include<stdlib.h>#include<pthread.h>#include<stdio.h>#include<sched.h>#include<errno.h>void*consumer(void*p){    static a=0 ;    a++;    printf("<<<<<<<<<<<<<<<<<<<<<(%u),%d\n",(unsigned)pthread_self(),a);    pthread_exit(NULL);}//如果主函数加上pthread_join(t1, NULL);才可以一直创建线程，如下， int main(int argc, char *argv[])    {           pthread_t  t1, t2, t3;         int ret;         do{                 ret = pthread_create(&t1, NULL, consumer, NULL);                  if(ret != 0)                  {                               printf("create failed,%d\n", ret);                          exit(1);                 } pthread_join(t1, NULL);                          }while(1);         sleep(1);      return 0; }