epoll_create - 打开一个epoll的文件描述符

内容简介

#include  

int epoll_create(int size) 

描述

Open an epoll file descriptor by requesting the kernel allocate an event backing store dimensioned for size descriptors. The size is not the maximum size of the backing store but just a hint to the kernel about how to dimension internal structures. The returned file descriptor will be used for all the subsequent calls to the epoll interface. The file descriptor returned by epoll_create(2) must be closed by using close(2).

返回值

When successful, epoll_create(2) returns a non-negative integer identifying the descriptor. When an error occurs, epoll_create(2) returns -1 and errno is set appropriately.

错误

Error Code	描述
EINVAL	size is not positive.
ENFILE	The system limit on the total number of open files has been reached.
ENOMEM	There was insufficient memory to create the kernel object.

遵循于

epoll_create(2) 在Linux内核2.5.44 推出了一个新的API。该接口应该由Linux kernel 2.5.66。

另请参阅

• close (2)

• epoll_ctl (2)

• epoll_wait (2)