111 lines
2.5 KiB
Rust
111 lines
2.5 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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/*!
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Higher level communication abstractions.
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*/
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use core::comm::{GenericChan, GenericSmartChan, GenericPort};
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use core::comm::{Chan, Port, Selectable, Peekable};
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use core::pipes;
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/// An extension of `pipes::stream` that allows both sending and receiving.
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pub struct DuplexStream<T, U> {
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priv chan: Chan<T>,
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priv port: Port<U>,
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}
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// Allow these methods to be used without import:
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pub impl<T:Owned,U:Owned> DuplexStream<T, U> {
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fn send(&self, x: T) {
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self.chan.send(x)
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}
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fn try_send(&self, x: T) -> bool {
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self.chan.try_send(x)
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}
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fn recv(&self, ) -> U {
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self.port.recv()
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}
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fn try_recv(&self) -> Option<U> {
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self.port.try_recv()
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}
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fn peek(&self) -> bool {
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self.port.peek()
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}
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}
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impl<T:Owned,U:Owned> GenericChan<T> for DuplexStream<T, U> {
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fn send(&self, x: T) {
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self.chan.send(x)
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}
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}
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impl<T:Owned,U:Owned> GenericSmartChan<T> for DuplexStream<T, U> {
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fn try_send(&self, x: T) -> bool {
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self.chan.try_send(x)
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}
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}
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impl<T:Owned,U:Owned> GenericPort<U> for DuplexStream<T, U> {
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fn recv(&self) -> U {
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self.port.recv()
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}
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fn try_recv(&self) -> Option<U> {
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self.port.try_recv()
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}
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}
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impl<T:Owned,U:Owned> Peekable<U> for DuplexStream<T, U> {
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fn peek(&self) -> bool {
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self.port.peek()
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}
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}
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impl<T:Owned,U:Owned> Selectable for DuplexStream<T, U> {
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fn header(&self) -> *pipes::PacketHeader {
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self.port.header()
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}
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}
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/// Creates a bidirectional stream.
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pub fn DuplexStream<T:Owned,U:Owned>()
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-> (DuplexStream<T, U>, DuplexStream<U, T>)
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{
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let (p1, c2) = comm::stream();
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let (p2, c1) = comm::stream();
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(DuplexStream {
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chan: c1,
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port: p1
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},
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DuplexStream {
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chan: c2,
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port: p2
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})
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}
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#[cfg(test)]
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mod test {
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use comm::DuplexStream;
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#[test]
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pub fn DuplexStream1() {
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let (left, right) = DuplexStream();
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left.send(~"abc");
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right.send(123);
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assert!(left.recv() == 123);
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assert!(right.recv() == ~"abc");
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}
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}
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