Path: utzoo!utgpu!watmath!clyde!att!rutgers!tut.cis.ohio-state.edu!ucbvax!pasteur!ames!haven!uflorida!gatech!ncsuvx!mcnc!rti!sas!walker
From: walker@sas.UUCP (Doug Walker)
Newsgroups: comp.sys.amiga.tech
Subject: Re: How to peek at queued Intution msgs?
Message-ID: <1017@sas.UUCP>
Date: 28 Apr 89 15:00:18 GMT
References: <11640015@hpfcdc.HP.COM>
Reply-To: walker@sas.UUCP (Doug Walker)
Organization: SAS Institute Inc, Cary NC
Lines: 13

In article <11640015@hpfcdc.HP.COM> cunniff@hpfcdc.HP.COM (Ross Cunniff) writes:
>What is the best way to look for a SPECIFIC message
>on a window's UserPort?   For example, say I have an

Messages in a MsgPort are simply items in a linked list, linked with a
Node structure by Exec.  For your application, you can simply do a Forbid()
(to prevent task switches), walk the linked list looking for the appropriate
cancellation code, then Permit().  If you found the cancel code, you would
then GetMsg() until you get it.

Anybody know why this wouldn't work?  How safe is it from DOS upgrades, etc?

--- Doug