[issue12328] multiprocessing's overlapped PipeConnection on Windows

[sbt]

sbt <shibturn at gmail.com> added the comment:

Here is an updated patch (pipe_poll_fix.patch) which should be applied on top of sigint_event.patch.

It fixes the problems with PipeConnection.poll() and Queue.empty() and makes PipeListener.accept() use overlapped I/O.  This should make all the pipe releated blocking functions/methods interruptible on Windows.

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Added file: http://bugs.python.org/file23736/pipe_poll_fix.patch

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