Add a helper for sending a message on task failure

This commit is contained in:
Keegan McAllister 2013-12-06 16:39:59 -08:00
parent 73e2e57535
commit 68cc30c1df

View file

@ -3,9 +3,23 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use std::task;
use std::comm::SharedChan;
use std::task::TaskBuilder;
pub fn spawn_named<S: IntoSendStr>(name: S, f: proc()) {
let mut builder = task::task();
builder.name(name);
builder.spawn(f);
}
/// Arrange to send a particular message to a channel if the task built by
/// this `TaskBuilder` fails.
pub fn send_on_failure<T: Send>(builder: &mut TaskBuilder, msg: T, dest: SharedChan<T>) {
let port = builder.future_result();
do spawn {
match port.recv() {
Ok(()) => (),
Err(..) => dest.send(msg),
}
}
}