Linux--多线程之线程连接pthread

#include "apue.h" /** 1.main函数的线程称为初始线程或主线程，主线程在main函数返回的时候，会导致 整个线程结束。可以在主线程中使用pthread_exit函数 退出主线程 如此， 进程会等待所有的线程结束时候才终止 当一个线程被pthread_join之后 另外一个线程不能再pthread_join它 */ struct person{ int age; char name[10]; }; void *thread_fun(void *person1){ int i; for(i=0;i<5;i++){ printf("fun1 age =%d name=%s \n",((struct person*)person1)->age,((struct person*)person1)->name); sleep(1); } printf(" fun 1 ended\n"); return (void *)1; } void *thread_fun2(void *person1){ int i; for(i=0;i<5;i++){ printf("fun2 age =%d name=%s \n",((struct person*)person1)->age,((struct person*)person1)->name); sleep(2); } printf(" fun 2 ended\n"); return (void *)2; } int main(){ pthread_t tid1,tid2; int err1,err2; //初始化结构体1 struct person per; per.age = 20; strcpy(per.name,"liu pan"); //初始化结构体2 struct person per2; per2.age = 18; strcpy(per2.name,"li si"); //创建线程 err1 = pthread_create(&tid1,NULL,thread_fun,&per); err2 = pthread_create(&tid2,NULL,thread_fun2,&per2); if(err1||err2){//err1或者err2不等于0时 perror(" fail to create thread "); return -1; } printf("success to create thread err1 =%d err2 =%d\n ",err1,err2); printf("pid1 = %lu tid2 = %lu \n",tid1,tid2); //连接线程 void *rval,*rval2; pthread_join(tid1,&rval); pthread_join(tid2,&rval2); printf("rval = %d rval2 = %d \n",(int)rval,(int)rval2);//打印线程函数返回值 printf("start to quit main thread \n "); //主线程退出 pthread_exit(NULL);//always succeeds }