epoll_create - create an epoll instance

Syntax	#include <sys/epoll.h> int epoll_create (int size)
Description	The epoll functions are a scalable I/O event notification mechanism and thus an alternative to the POSIX functions select() and poll(). epoll_create() creates an epoll instance and returns a file descriptor referring to the new epoll instance. This file descriptor is used for all the subsequent calls to the epoll interface. When no longer required, the file descriptor returned by epoll_create() should be closed by using close(). The size argument is ignored, but must be greater than zero.
Return val.	File descriptor
		if successful.
	-1	if an error occurs; errno is set to indicate the error.
Errors	epoll_create() will fail if:
	EINVAL ENFILE ENOMEM	size is not positive. The system-wide limit on the total number of open files has been reached. There was insufficient memory to create the kernel object .
See also	epoll_ctl(), epoll_wait()