To understand the backlog argument, we must realize that for a given listening socket, the kernel maintains two queues :要明白backlog参数的含义,我们必须明白对于一个listening socket,kernel维护者两个队列: 1.An incomplete connection queue, which contains an entry for each SYN t
MySQL 各种超时参数的含义 今日在查看锁超时的设置时,看到show variables like '%timeout%';语句输出结果中的十几种超时参数时突然想整理一下,不知道大家有没有想过,这么多的timeout参数,到底有什么区别,都是做什么用的呢? MySQL [(none)]> show variables like '%timeout%'; +------------------------------+----------+ | Variable_name | Value | +
首先,需要明确main函数是什么? 答:main函数是C语言约定的入口函数 C99标准里面是这样描述的: Program startup The function called at program startup is named main.The implementation declares no prototype for this function. It shall be defined with a return type of int and with no parameters: