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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/*!
Higher level communication abstractions.
*/
// NB: transitionary, de-mode-ing.
#[forbid(deprecated_mode)];
use core::pipes::{GenericChan, GenericSmartChan, GenericPort};
use core::pipes::{Chan, Port, Selectable, Peekable};
use core::pipes;
use core::prelude::*;
/// An extension of `pipes::stream` that allows both sending and receiving.
pub struct DuplexStream<T, U> {
priv chan: Chan<T>,
priv port: Port<U>,
}
impl<T: Owned, U: Owned> DuplexStream<T, U> : GenericChan<T> {
fn send(x: T) {
self.chan.send(move x)
}
}
impl<T: Owned, U: Owned> DuplexStream<T, U> : GenericSmartChan<T> {
fn try_send(x: T) -> bool {
self.chan.try_send(move x)
}
}
impl<T: Owned, U: Owned> DuplexStream<T, U> : GenericPort<U> {
fn recv() -> U {
self.port.recv()
}
fn try_recv() -> Option<U> {
self.port.try_recv()
}
}
impl<T: Owned, U: Owned> DuplexStream<T, U> : Peekable<U> {
pure fn peek() -> bool {
self.port.peek()
}
}
impl<T: Owned, U: Owned> DuplexStream<T, U> : Selectable {
pure fn header() -> *pipes::PacketHeader {
self.port.header()
}
}
/// Creates a bidirectional stream.
pub fn DuplexStream<T: Owned, U: Owned>()
-> (DuplexStream<T, U>, DuplexStream<U, T>)
{
let (p1, c2) = pipes::stream();
let (p2, c1) = pipes::stream();
(DuplexStream {
chan: move c1,
port: move p1
},
DuplexStream {
chan: move c2,
port: move p2
})
}
#[cfg(test)]
mod test {
use comm::DuplexStream;
#[test]
pub fn DuplexStream1() {
let (left, right) = DuplexStream();
left.send(~"abc");
right.send(123);
assert left.recv() == 123;
assert right.recv() == ~"abc";
}
}
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