Module epoll 

epoll I/O multiplexing

Linux-compatible epoll implementation for event-driven I/O. Used by Rust’s mio/tokio for async I/O on VeridianOS.

Architecture

Each epoll instance is an fd-based object containing:

• An interest list (fds being monitored + event masks)
• A ready list (fds with pending events)

Supports both level-triggered (default) and edge-triggered modes.

Structs

EpollEvent

Event structure passed to/from user space (matches Linux struct epoll_event).

EpollNode

VfsNode wrapper around an epoll instance.

Constants

EPOLLERR

Error condition.

EPOLLET

Edge-triggered mode.

EPOLLHUP

Hang up (peer closed connection).

EPOLLIN

Available for read.

EPOLLONESHOT

One-shot mode (disables after first event).

EPOLLOUT

Available for write.

EPOLL_CTL_ADD

Add fd to interest list.

EPOLL_CTL_DEL

Remove fd from interest list.

EPOLL_CTL_MOD

Modify events for an fd.

Functions

epoll_create

Create a new epoll instance. Returns the epoll ID (used as a pseudo-fd).

epoll_ctl

Perform a control operation on an epoll instance.

epoll_destroy

Destroy an epoll instance.

epoll_wait

Wait for events on an epoll instance.

init

Initialize the epoll subsystem.