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use std::time::Duration; use std::thread; use std::sync::{ Arc, atomic::{AtomicBool, Ordering} }; use std::io::ErrorKind::Interrupted; use queen_io::{ epoll::{Epoll, Events, Token, Ready, EpollOpt}, queue::mpsc::Queue }; use nson::{ Message, message_id::MessageId }; use crate::Wire; use crate::error::{Result, Error, RecvError, Code}; pub use hook::{Hook, NonHook}; pub use switch::Switch; pub use slot::Slot; mod hook; mod switch; mod slot; #[derive(Clone)] pub struct Socket { inner: Arc<Inner> } struct Inner { id: MessageId, queue: Queue<Packet>, run: AtomicBool } impl Socket { pub fn new(id: MessageId, hook: impl Hook) -> Result<Self> { let queue = Queue::new()?; let socket = Socket { inner: Arc::new(Inner { id, queue: queue.clone(), run: AtomicBool::new(true) }) }; let mut main_loop = MainLoop::new( id, queue, hook, )?; let socket2 = socket.clone(); thread::Builder::new().name("socket".to_string()).spawn(move || { let ret = main_loop.run(); if ret.is_err() { log::error!("socket loop exit: {:?}", ret); } else { log::trace!("socket loop exit"); } socket2.inner.run.store(false, Ordering::Relaxed); main_loop.hook.stop(&main_loop.switch); }).unwrap(); Ok(socket) } pub fn id(&self) -> &MessageId { &self.inner.id } pub fn stop(&self) { self.inner.run.store(false, Ordering::Relaxed); self.inner.queue.push(Packet::Close); } pub fn running(&self) -> bool { self.inner.run.load(Ordering::Relaxed) } pub fn connect( &self, slot_id: MessageId, root: bool, attr: Message, capacity: Option<usize>, timeout: Option<Duration> ) -> Result<Wire<Message>> { let (wire1, wire2) = Wire::pipe(capacity.unwrap_or(64), attr)?; let packet = Packet::NewSlot(slot_id, root, wire1); self.inner.queue.push(packet); let ret = wire2.wait(Some(timeout.unwrap_or_else(|| Duration::from_secs(10))))?; if let Some(code) = Code::get(&ret) { if code != Code::Ok { return Err(Error::ErrorCode(code)) } } else { unreachable!() } Ok(wire2) } } impl Drop for Socket { fn drop(&mut self) { if Arc::strong_count(&self.inner) <= 2 { self.stop() } } } struct MainLoop<H> { epoll: Epoll, events: Events, queue: Queue<Packet>, hook: H, switch: Switch } enum Packet { NewSlot(MessageId, bool, Wire<Message>), Close } impl<H: Hook> MainLoop<H> { const QUEUE_TOKEN: Token = Token(usize::max_value()); fn new(socket_id: MessageId, queue: Queue<Packet>, hook: H) -> Result<MainLoop<H>> { Ok(MainLoop { epoll: Epoll::new()?, events: Events::with_capacity(1024), queue, hook, switch: Switch::new(socket_id) }) } fn run(&mut self) -> Result<()> { self.epoll.add(&self.queue, Self::QUEUE_TOKEN, Ready::readable(), EpollOpt::level())?; loop { let size = match self.epoll.wait(&mut self.events, None) { Ok(size) => size, Err(err) => { if err.kind() == Interrupted { continue; } else { return Err(err.into()) } } }; for i in 0..size { let event = self.events.get(i).unwrap(); let token = event.token(); match token { Self::QUEUE_TOKEN => { if let Some(packet) = self.queue.pop() { match packet { Packet::NewSlot(id, root, wire) => { self.switch.add_slot(&self.epoll, &self.hook, id, root, wire)?; } Packet::Close => { return Ok(()) } } } } _ => { let token = token.0; if let Some(slot) = self.switch.slots.get(token) { match slot.wire.recv() { Ok(message) => { self.switch.recv_message(&self.epoll, &self.hook, token, message)?; } Err(err) => { if !matches!(err, RecvError::Empty) { self.switch.del_slot(&self.epoll, &self.hook, token)?; } } } } } } } } } }