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// Copyright 2013 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.
use container::Container;
use kinds::Send;
use vec::OwnedVector;
use cell::Cell;
use option::*;
use unstable::sync::{Exclusive, exclusive};
use clone::Clone;
pub struct MessageQueue<T> {
// XXX: Another mystery bug fixed by boxing this lock
priv queue: ~Exclusive<~[T]>
}
impl<T: Send> MessageQueue<T> {
pub fn new() -> MessageQueue<T> {
MessageQueue {
queue: ~exclusive(~[])
}
}
pub fn push(&mut self, value: T) {
unsafe {
let value = Cell::new(value);
self.queue.with(|q| q.push(value.take()) );
}
}
pub fn pop(&mut self) -> Option<T> {
unsafe {
do self.queue.with |q| {
if !q.is_empty() {
Some(q.shift())
} else {
None
}
}
}
}
}
impl<T> Clone for MessageQueue<T> {
fn clone(&self) -> MessageQueue<T> {
MessageQueue {
queue: self.queue.clone()
}
}
}
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