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/*!
Higher level communication abstractions.
*/
// NB: transitionary, de-mode-ing.
#[forbid(deprecated_mode)];
use pipes::{Channel, Recv, Chan, Port, Selectable};
/// An extension of `pipes::stream` that allows both sending and receiving.
pub struct DuplexStream<T: Send, U: Send> {
priv chan: Chan<T>,
priv port: Port <U>,
}
impl<T: Send, U: Send> DuplexStream<T, U> : Channel<T> {
fn send(x: T) {
self.chan.send(move x)
}
fn try_send(x: T) -> bool {
self.chan.try_send(move x)
}
}
impl<T: Send, U: Send> DuplexStream<T, U> : Recv<U> {
fn recv() -> U {
self.port.recv()
}
fn try_recv() -> Option<U> {
self.port.try_recv()
}
pure fn peek() -> bool {
self.port.peek()
}
}
impl<T: Send, U: Send> DuplexStream<T, U> : Selectable {
pure fn header() -> *pipes::PacketHeader {
self.port.header()
}
}
/// Creates a bidirectional stream.
pub fn DuplexStream<T: Send, U: Send>()
-> (DuplexStream<T, U>, DuplexStream<U, T>)
{
let (c2, p1) = pipes::stream();
let (c1, p2) = pipes::stream();
(DuplexStream {
chan: c1,
port: p1
},
DuplexStream {
chan: c2,
port: p2
})
}
#[cfg(test)]
mod test {
#[legacy_exports];
#[test]
fn DuplexStream1() {
let (left, right) = DuplexStream();
left.send(~"abc");
right.send(123);
assert left.recv() == 123;
assert right.recv() == ~"abc";
}
}
|
