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// Copyright © 2021 Mozilla Foundation
//
// This program is made available under an ISC-style license. See the
// accompanying file LICENSE for details
use std::{collections::VecDeque, io::Result};
use bytes::BytesMut;
use mio::{event::Source, Interest, Registry, Token};
#[cfg(unix)]
mod unix;
use crate::messages::RemoteHandle;
#[cfg(unix)]
pub use self::unix::*;
#[cfg(windows)]
mod windows;
#[cfg(windows)]
pub use self::windows::*;
impl Source for Pipe {
fn register(&mut self, registry: &Registry, token: Token, interests: Interest) -> Result<()> {
self.io.register(registry, token, interests)
}
fn reregister(&mut self, registry: &Registry, token: Token, interests: Interest) -> Result<()> {
self.io.reregister(registry, token, interests)
}
fn deregister(&mut self, registry: &Registry) -> Result<()> {
self.io.deregister(registry)
}
}
const HANDLE_QUEUE_LIMIT: usize = 16;
#[derive(Debug)]
pub struct ConnectionBuffer {
pub buf: BytesMut,
handles: VecDeque<RemoteHandle>,
}
impl ConnectionBuffer {
pub fn with_capacity(cap: usize) -> Self {
ConnectionBuffer {
buf: BytesMut::with_capacity(cap),
handles: VecDeque::with_capacity(HANDLE_QUEUE_LIMIT),
}
}
pub fn is_empty(&self) -> bool {
self.buf.is_empty()
}
pub fn push_handle(&mut self, handle: RemoteHandle) {
assert!(self.handles.len() < self.handles.capacity());
self.handles.push_back(handle)
}
pub fn pop_handle(&mut self) -> Option<RemoteHandle> {
self.handles.pop_front()
}
}
pub trait RecvMsg {
// Receive data from the associated connection. `recv_msg` expects the capacity of
// the `ConnectionBuffer` members have been adjusted appropriately by the caller.
fn recv_msg(&mut self, buf: &mut ConnectionBuffer) -> Result<usize>;
}
pub trait SendMsg {
// Send data on the associated connection. `send_msg` consumes and adjusts the length of the
// `ConnectionBuffer` members based on the size of the successful send operation.
fn send_msg(&mut self, buf: &mut ConnectionBuffer) -> Result<usize>;
}
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