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From: Jeff Webb <w1@codecraftsmen.org>
To: "xenomai@xenomai.org" <xenomai@xenomai.org>
Subject: RE: select() unblocks when no data to read()
Date: Wed, 08 May 2019 01:53:51 +0000	[thread overview]
Message-ID: <VpFdLbJqKpBKdxuwpEr9vxR2VBu2j4uXIps1EM68ktxueh7Q9bRQeHRA56sFDKeY1xbPcvb6TuGG01MVtxNt03OdF6N1b3YIEPjJnzbRjqk=@codecraftsmen.org> (raw)

I am having trouble using select() to perform a timed wait on a UDD file descriptor to detect interrupts from a custom PCI card.  After some searching, I came across this thread from 2017 that describes my exact issue:

https://xenomai.org/pipermail/xenomai/2017-July/037494.html

I am using x86-64 instead of ARM, but I am having the same trouble.  The original poster did a great job of describing the problem, so I won't repeat it.  If I use only read() without select(), things work as expected, but I need to implement a timeout.

It sounds like Philippe was going to look into the issue further.  Has any progress on this issue been made since the last post in this thread?

Thanks,

-Jeff Webb



             reply	other threads:[~2019-05-08  1:53 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-08  1:53 Jeff Webb [this message]
2019-05-09 14:19 ` select() unblocks when no data to read() Greg Gallagher
2019-05-10  1:26   ` Jeff Webb
2019-05-10  1:37     ` Greg Gallagher
2019-05-22 13:02       ` Jeff Webb
2019-05-10  8:24     ` Philippe Gerum
2019-05-22 13:06       ` Jeff Webb

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