Message 344744 - Python tracker

Message344744

Author	steve.dower
Recipients	David Hirschfeld, andzn, asvetlov, desbma, paul.moore, pitrou, steve.dower, tim.golden, vstinner, zach.ware
Date	2019-06-05.16:21:33
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1559751693.85.0.187275917436.issue28708@roundup.psfhosted.org>
In-reply-to

Content
> How does select() know the FD_SETSIZE? It doesn't have to. The actual number of descriptors is passed in, and the API presumably assumes that FD_SETSIZE is bigger than that (or else the caller would have crashed writing to invalid memory). I don't see why we'd make it a parameter though. If we have all the descriptors, just allocate a big enough array and pass it in?

Content

> How does select() know the FD_SETSIZE?

It doesn't have to. The actual number of descriptors is passed in, and the API presumably assumes that FD_SETSIZE is bigger than that (or else the caller would have crashed writing to invalid memory).

I don't see why we'd make it a parameter though. If we have all the descriptors, just allocate a big enough array and pass it in?

History
Date	User	Action	Args
2019-06-05 16:21:33	steve.dower	set	recipients: + steve.dower, paul.moore, pitrou, vstinner, tim.golden, asvetlov, zach.ware, desbma, David Hirschfeld, andzn
2019-06-05 16:21:33	steve.dower	set	messageid: <1559751693.85.0.187275917436.issue28708@roundup.psfhosted.org>
2019-06-05 16:21:33	steve.dower	link	issue28708 messages
2019-06-05 16:21:33	steve.dower	create