小葫芦藤

摘要： # include int poll (struct pollfd *fds, unsigned int nfds, int timeout);和select()不一样，poll()没有使用低效的三个基于位的文件描述符set，而是采用了一个单独的结构体pollfd数组，由fds指针指向这个组。pollfd结构体定义如下：#include struct pollfd {int fd; /* file descriptor */short events; /* requested events to watch */short revents; /* returned events witnes. 阅读全文