bjoernager/rust
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Add a selectable trait.

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This commit is contained in:
Eric Holk 2012-07-13 15:39:31 -07:00
parent 0487663e7d
commit 436d263aed
1 changed files with 14 additions and 2 deletions
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16
src/libcore/pipes.rs
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@ -318,10 +318,22 @@ fn select2<A: send, B: send>(
}
}
fn selecti<T: send>(endpoints: &[&recv_packet<T>]) -> uint {
trait selectable {
pure fn header() -> *packet_header;
}
fn selecti<T: selectable>(endpoints: &[T]) -> uint {
wait_many(endpoints.map(|p| p.header()))
}
fn select2i<A: selectable, B: selectable>(a: A, b: B) -> either<(), ()> {
alt wait_many([a.header(), b.header()]/_) {
0 { left(()) }
1 { right(()) }
_ { fail "wait returned unexpected index" }
}
}
#[doc = "Waits on a set of endpoints. Returns a message, its index,
and a list of the remaining endpoints."]
fn select<T: send>(+endpoints: ~[recv_packet<T>])
@ -552,7 +564,7 @@ class port_set<T: send> {
}
}
impl private_methods/&<T: send> for pipes::port<T> {
impl<T: send> of selectable for pipes::port<T> {
pure fn header() -> *pipes::packet_header unchecked {
alt self.endp {
some(endp) {