#include <stdio.h> #include <unistd.h> #include <pthread.h>
int tickets=1000; pthread_mutex_t mutex;
void* sellticket(void*arg){         //加锁         while(1){         pthread_mutex_lock(&mutex);         if(tickets>0){             usleep(6000);             printf("%ld正在卖%d张门票\n",pthread_self(),tickets);             tickets --;         }else{             pthread_mutex_unlock(&mutex);             break;         }         pthread_mutex_unlock(&mutex);         }         return NULL;  }
int main(){     //创建一个互斥量     pthread_mutex_init(&mutex,NULL);     //创建3个子线程     pthread_t tid1,tid2,tid3;     pthread_create(&tid1,NULL,sellticket,NULL);     pthread_create(&tid2,NULL,sellticket,NULL);     pthread_create(&tid3,NULL,sellticket,NULL);
    //回收子线程     pthread_join(tid1,NULL);     pthread_join(tid2,NULL);     pthread_join(tid3,NULL);
    pthread_exit(NULL);//退出主线程
    //设置线程分离     //pthread_detach(tid1);     //pthread_detach(tid2);     //pthread_detach(tid3);     pthread_mutex_destroy(&mutex);     return 0; }