Xref: utzoo comp.unix.questions:18641 comp.os.misc:1058
Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!mcnc!rti!xyzzy!kan
From: kan@dg-rtp.dg.com (Victor Kan)
Newsgroups: comp.unix.questions,comp.os.misc
Subject: An equivalent of select() but for message queues?
Summary: Does it exist?
Message-ID: <1731@xyzzy.UUCP>
Date: 29 Dec 89 01:41:18 GMT
Sender: usenet@xyzzy.UUCP
Reply-To: kan@tom.dg.com ()
Organization: Data General Corporation, Research Triangle Park, NC
Lines: 22

Does anyone know if there's a Unix system call that's analogous 
to select() but works on message queues rather than file descriptors?

Basically, I want to have a high resolution time out mechanism for 
msgrcv() rather than just blocking until a message of the right type 
comes in, or polling.  I know I can kludge it with alarm signals or 
select() on a dummy file descriptor with a timeout value, but I'd 
prefer to avoid this.

It seems like such an obvious feature; how do non-Unix OS's do this, 
if at all?  Any Mach, QNX or other message based systems users out 
there with the answer?

Please reply by e-mail and I'll summarize to comp.unix.questions.

kan@dg-rtp.dg.com or ...!mcnc!rti!xyzzy!kan should work.

Thanks for any info!

| Victor Kan               | I speak only for myself.               |  ***
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