Module epoll 

A minimal, safe epoll primitive for the QUIC-mimicry driver (3c.1).

yipd is #![forbid(unsafe_code)], but the QUIC pump (bin/yipd/src/quic.rs) needs the same “wait on UDP + TUN with a caller-chosen timeout” capability that crate::poll::run_poll has — except quinn-proto’s decoupled I/O and dynamic timers want the loop outside yip-io, with the driver choosing min(Connection::poll_timeout(), 10ms) per iteration. This module exposes exactly that as a small safe wrapper (Epoll) so all the epoll/fcntl unsafe stays here, in the one crate permitted to hold it.

This is intentionally not an event loop — it only blocks until one of the two fds is readable (or the timeout fires) and reports which. The driver owns the recv/send/timer logic.

Structs

Epoll

An epoll instance watching a UDP socket fd and a TUN/TAP fd for EPOLLIN.

Ready

Which of the two watched fds became readable in the last Epoll::wait.

Functions

read_fd

Read from a raw fd into buf, returning the number of bytes read.

set_nonblocking

Set a file descriptor to non-blocking mode via fcntl(O_NONBLOCK).

write_fd

Write buf to a raw fd, returning the number of bytes written.