Message 135623 - Python tracker

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Author	pitrou
Recipients	asksol, brian.curtin, gregory.p.smith, jnoller, neologix, pitrou
Date	2011-05-09.18:39:21
SpamBayes Score	2.909752e-05
Marked as misclassified	No
Message-id	<1304966363.67.0.392142624447.issue12040@psf.upfronthosting.co.za>
In-reply-to

Content
This patch exposes a new read-only property of multiprocessing.Process objects, named "sentinel". As the doc indicates, this is a file descriptor undex Unix, and a handle under Windows. Both are suitable for flexible polling/waiting with the appropriate OS primitives. They become ready when the process has ended. Under Unix, this also replaces the repeated polling in _Popen.wait() (called from Process.join()) with a regular select() call, making it friendlier with CPU low-power states. This is necessary for issue9205.

This patch exposes a new read-only property of multiprocessing.Process objects, named "sentinel".
As the doc indicates, this is a file descriptor undex Unix, and a handle under Windows. Both are suitable for flexible polling/waiting with the appropriate OS primitives. They become ready when the process has ended.
Under Unix, this also replaces the repeated polling in _Popen.wait() (called from Process.join()) with a regular select() call, making it friendlier with CPU low-power states.

This is necessary for issue9205.

History
Date	User	Action	Args
2011-05-09 18:39:23	pitrou	set	recipients: + pitrou, gregory.p.smith, jnoller, brian.curtin, asksol, neologix
2011-05-09 18:39:23	pitrou	set	messageid: <1304966363.67.0.392142624447.issue12040@psf.upfronthosting.co.za>
2011-05-09 18:39:21	pitrou	link	issue12040 messages
2011-05-09 18:39:21	pitrou	create