Question

我目前正在运行此循环以关闭我的所有＆＃34;工厂＆＃34;然而，执行没有到达pthread_join()之后的print语句。我的理解是，如果线程已经终止，那么pthread_join()将立即返回。我怀疑factory_thread挂了

 stop_thread_factories = true;

 for(int i=0; i<factories; i++) {
    printf("stopping Candy factory %d\n",i); 
    pthread_join(*factoryThreads[i], NULL);
    printf("Candy factory %d stopped!\n",i);
    //unction waits for the thread specified by thread to terminate. 
}

这是工厂线程功能，我已经添加了打印语句，以查看它被卡住的位置。

void* factory_thread(void* arg){

int i = (intptr_t)arg;

int wait_time;
while(stop_thread_factories == false){

    wait_time = rand()%4;   //wait times will be from 0 to 3
    printf("\tFactory %d ships candy & waits %ds\n", i, wait_time);

    //following steps in the outline in the assignment

    candy_t* newCandy = malloc(sizeof(candy_t));
    newCandy->time_stamp_in_ms = current_time_in_ms();
    newCandy->factory_number = i;
    printf("about to insert\n");
    bbuff_blocking_insert(newCandy);
    printf("done inserting\n");
    stats_record_produced(i);
    sleep(wait_time);
}

printf("Candy-factory %d done\n", i);

pthread_exit(NULL);

printf("Just finished the exit call\n");

return NULL;

}

然而，这是我留下的输出，程序挂起在下一行。任何建议或提示将不胜感激！顺便说一句，这是为了学校作业。

stopping Candy factory 0
Candy-factory 0 done

程序在pthread_join（）

0 个答案: