Feature #11122: exception-free non-blocking Queue/SizedQueue operations

• Status: Assigned
• Assignee: matz (Yukihiro Matsumoto)
• Target version: -

[normalperson (Eric Wong)]

I would like to reduce exceptions for non-blocking operations on
Queue/SizedQueue in the same way we are reducing exceptions for non-blocking
I/O with *_nonblock(..., exception: false) methods.

However, I'm unclear what the API would be, since queues return Ruby objects
instead of String buffers or number of bytes written, so any special
object/symbol we would return could conflict with existing applications.

Perhaps something like:

queue.pop(nonblock: :WAIT)
queue.push(obj, nonblock: :WAIT)

Which would allow user to specify which object to raise when a queue is empty
or full (similar to Timeout.timeout allowing specific exception to raise).

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Assigned