rust/hedgewars-server/src/server/io.rs
author alfadur
Tue, 09 Apr 2019 21:08:35 +0300
changeset 14784 f43ab2bd76ae
parent 14462 98ef2913ec73
child 14785 65861ba8b4e8
permissions -rw-r--r--
add a thread for internal server IO and implement account checking with it
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use std::{
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    fs::{File, OpenOptions},
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    io::{Error, ErrorKind, Read, Result, Write},
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    sync::mpsc,
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    thread,
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};
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use crate::server::{
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    database::Database,
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    handlers::{IoResult, IoTask},
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};
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use mio::{Evented, Poll, PollOpt};
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use mio_extras::channel;
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pub type RequestId = u32;
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pub struct IOThread {
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    core_tx: mpsc::Sender<(RequestId, IoTask)>,
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    core_rx: channel::Receiver<(RequestId, IoResult)>,
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}
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impl IOThread {
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    pub fn new() -> Self {
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        let (core_tx, io_rx) = mpsc::channel();
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        let (io_tx, core_rx) = channel::channel();
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        let mut db = Database::new();
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        db.connect("localhost");
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        thread::spawn(move || {
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            while let Ok((request_id, task)) = io_rx.try_recv() {
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                match task {
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                    IoTask::GetAccount {
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                        nick,
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                        protocol,
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                        password_hash,
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                        client_salt,
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                        server_salt,
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                    } => {
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                        if let Ok(account) = db.get_account(
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                            &nick,
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                            protocol,
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                            &password_hash,
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                            &client_salt,
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                            &server_salt,
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                        ) {
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                            io_tx.send((request_id, IoResult::Account(account)));
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                        }
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                    }
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                }
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            }
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        });
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        Self { core_rx, core_tx }
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    }
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    pub fn send(&self, request_id: RequestId, task: IoTask) {
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        self.core_tx.send((request_id, task)).unwrap();
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    }
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    pub fn try_recv(&self) -> Option<(RequestId, IoResult)> {
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        match self.core_rx.try_recv() {
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            Ok(result) => Some(result),
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            Err(mpsc::TryRecvError::Empty) => None,
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            Err(mpsc::TryRecvError::Disconnected) => unreachable!(),
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        }
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    }
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    pub fn register_rx(&self, poll: &mio::Poll, token: mio::Token) -> Result<()> {
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        self.core_rx
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            .register(poll, token, mio::Ready::readable(), PollOpt::edge())
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    }
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}