Unit 'Linux'	Package
[Overview][Constants][Types][Procedures and functions][Index]	[#rtl]

epoll_ctl

Modify an epoll file descriptor.

Declaration

Source position: linux.pp line 304

function epoll_ctl(

epfd: cint;

op: cint;

fd: cint;

event: PEpoll_Event

):cint;

Description

epoll_ctl performs the op operation on epoll file descriptor epfd. The operation will be monitored on file descriptor fd, and is optionally controlled by event.

op can be one of the following values:

EPOLL_CTL_ADD: Add filedescriptor to list of events.
EPOLL_CTL_MOD: Modify event for filedescriptor.
EPOLL_CTL_DEL: Delete event for filedescriptor.

The events field in event_data is a bitmask of one or more of the following values:

EPOLLIN: The file is ready for read operations
EPOLLOUT: The file is ready for write operations.
EPOLLPRI: Urgent data is available for read operations.
EPOLLERR: An error condition is signaled on the file descriptor.
EPOLLHUP: A Hang up happened on the file descriptor.
EPOLLET: Set the Edge Triggered behaviour for the file descriptor.
EPOLLONESHOT: Set One-Shot behaviour for the file descriptor. The event will be triggered only once.

Errors

On error -1 is returned, and errno is set accordingly.

epoll_create		Create new epoll file descriptor.
epoll_wait		Wait for an event on an epoll file descriptor.
fpClose		Close file descriptor.

epoll_ctl

Declaration

Description

Errors

See also