77 lines
1.4 KiB
Rust
77 lines
1.4 KiB
Rust
|
/*!
|
||
|
|
|
||
|
|
Higher level communication abstractions.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
// NB: transitionary, de-mode-ing.
|
||
|
|
#[forbid(deprecated_mode)];
|
||
|
|
#[forbid(deprecated_pattern)];
|
||
|
|
|
||
|
|
// Make sure we follow the new conventions
|
||
|
|
#[forbid(non_camel_case_types)];
|
||
|
|
|
||
|
|
import pipes::{channel, recv, chan, port, selectable};
|
||
|
|
|
||
|
|
export DuplexStream;
|
||
|
|
|
||
|
|
/// An extension of `pipes::stream` that allows both sending and receiving.
|
||
|
|
struct DuplexStream<T: send, U: send> : channel<T>, recv<U>, selectable {
|
||
|
|
priv chan: chan<T>;
|
||
|
|
priv port: port<U>;
|
||
|
|
|
||
|
|
fn send(+x: T) {
|
||
|
|
self.chan.send(x)
|
||
|
|
}
|
||
|
|
|
||
|
|
fn try_send(+x: T) -> bool {
|
||
|
|
self.chan.try_send(x)
|
||
|
|
}
|
||
|
|
|
||
|
|
fn recv() -> U {
|
||
|
|
self.port.recv()
|
||
|
|
}
|
||
|
|
|
||
|
|
fn try_recv() -> option<U> {
|
||
|
|
self.port.try_recv()
|
||
|
|
}
|
||
|
|
|
||
|
|
pure fn peek() -> bool {
|
||
|
|
self.port.peek()
|
||
|
|
}
|
||
|
|
|
||
|
|
pure fn header() -> *pipes::packet_header {
|
||
|
|
self.port.header()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Creates a bidirectional stream.
|
||
|
|
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 {
|
||
|
|
#[test]
|
||
|
|
fn DuplexStream1() {
|
||
|
|
let (left, right) = DuplexStream();
|
||
|
|
|
||
|
|
left.send(~"abc");
|
||
|
|
right.send(123);
|
||
|
|
|
||
|
|
assert left.recv() == 123;
|
||
|
|
assert right.recv() == ~"abc";
|
||
|
|
}
|
||
|
|
}
|