queue hardware os

Computer Science An Overview 11th Edition

Queues are often used as the underlying structure of a buffer, which as intro-duced in Chapter 1, is a storage area for the temporary placement of data being transferred from one location to another. As the items of data arrive at the buffer,they  are  placed  at  the  tail  of  the  queue.  Then,  when  it  comes  time  to  forward items  to  their  final  destination,  they  are  forwarded  in  the  order  in  which  they appear at the head of the queue. Thus, items are forwarded in the same order inwhich they arrived.

发问：

0-php原函数 来实现 队列，  是 php原函数 去操纵缓冲区 来实现队列吗？？？ 问题1-电话客服系统，这一个个待接听的号码，是如何进入缓冲区的？是脚本先接收再放入缓冲区再操作，3步吗？ 问题2-缓冲区和硬件有关，和os有关，那么一套php代码又是怎么实现兼容不同的硬件和os的？？谢谢。