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use crate::{ reactor::{ReactorHandle, Slot}, Result, }; use crossbeam_channel::{Receiver, Sender}; use log::trace; pub(crate) struct SocketState { readable: bool, writable: bool, error: bool, closed: bool, events: Receiver<SocketEvent>, handle: SocketStateHandle, } impl Default for SocketState { fn default() -> Self { let (sender, receiver) = crossbeam_channel::unbounded(); Self { readable: true, writable: true, error: false, closed: false, events: receiver, handle: SocketStateHandle { sender }, } } } #[derive(Clone)] pub struct SocketStateHandle { sender: Sender<SocketEvent>, } #[derive(Debug)] pub enum SocketEvent { Readable, Writable, Error, Closed, Wake, } impl SocketState { pub(crate) fn readable(&mut self) -> bool { self.readable } pub(crate) fn writable(&mut self) -> bool { self.writable } pub(crate) fn error(&mut self) -> bool { self.error } pub(crate) fn closed(&mut self) -> bool { self.closed } pub(crate) fn wait(&mut self) { self.handle_event(self.events.recv().expect("waiting for socket event failed")) } pub(crate) fn handle_read_result( &mut self, result: Result<()>, reactor: &dyn ReactorHandle, slot: Slot, ) -> Result<()> { self.readable = self.handle_io_result(result, self.readable)?; if !self.readable { reactor.poll_read(slot); } Ok(()) } pub(crate) fn handle_write_result( &mut self, result: Result<()>, reactor: &dyn ReactorHandle, slot: Slot, ) -> Result<()> { self.writable = self.handle_io_result(result, self.writable)?; if !self.writable { reactor.poll_write(slot); } Ok(()) } pub(crate) fn handle(&self) -> SocketStateHandle { self.handle.clone() } fn handle_io_result(&self, result: Result<()>, current: bool) -> Result<bool> { if let Err(err) = result { if err.wouldblock() { Ok(false) } else if err.interrupted() { self.handle.wake(); Ok(current) } else { Err(err) } } else { Ok(current) } } pub(crate) fn poll_events(&mut self) { while let Ok(event) = self.events.try_recv() { self.handle_event(event); } } fn handle_event(&mut self, event: SocketEvent) { trace!("Got event for socket: {:?}", event); match event { SocketEvent::Readable => self.readable = true, SocketEvent::Writable => self.writable = true, SocketEvent::Error => self.error = true, SocketEvent::Closed => self.closed = true, SocketEvent::Wake => {} } } } impl SocketStateHandle { pub fn send(&self, event: SocketEvent) { let _ = self.sender.send(event); } pub fn wake(&self) { self.send(SocketEvent::Wake); } }