add limited timed wait to semaphore

[steveklabnik]

Issue by drewcrawford
Thursday Jan 29, 2015 at 08:18 GMT

For earlier discussion, see rust-lang/rust#21741

This issue was labelled with: A-libs, A-threads, I-enhancement in the Rust repository

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I think Semaphore could use timeout variants of acquire and access, besides just blocking forever.

The underlying Condvar already has timeout support, so it's just a matter of bubbling it up to semaphore. Looking at sempahore.rs, it seems like low-hanging fruit to add.

I think the biggest question is whether it should be called acquire_timeout and access_timeout (following Condvar's wait_timeout) or whether it should be called try_acquire and try_access (following Mutex and RwLock).

If there's a decision rendered on the syntax, this would be a good feature for a new contributor.

[crlf0710]

semaphore had been gone for long, so i think this can be closed now. @Centril