rust/src/test/run-pass/pipe-peek.rs

// xfail-fast

// 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.

extern mod extra;
use extra::timer::sleep;
use extra::uv;
use std::pipes;

proto! oneshot (
    waiting:send {
        signal -> !
    }
)

pub fn main() {
    let mut (c, p) = oneshot::init();

    assert!(!pipes::peek(&mut p));

    oneshot::client::signal(c);

    assert!(pipes::peek(&mut p));
}