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List:       gtk-app-devel
Subject:    Re: Can shared memory data be used as a signal like gtk-input-add does with a pipe?
From:       M G Berberich <berberic () fmi ! uni-passau ! de>
Date:       2001-09-28 7:21:05
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Am Donnerstag, den 27. September 2001 17:04:39 schrieb Marco Quezada:
> "Norris, Kendall P." wrote:
> 
> > I am writing an application with a gtk process for user interface and a
> > seperate process for my test application.  I was using pipes for
> > communication between the processes but am now using shared memory as my
> > IPC.  I used gdk-input-add to emit a signal when the pipe had a message.  Is
> > there a way I can use a variable in the shared memory space,  monitor the
> > memory address with gtk looking for a change of state and cause a signal to
> > be emitted?
> >
> I'm not sure if this is the best and or only way to do it but I just have a
> timeout that runs at a certain rate (10 Hz in my case) and looks at the value
> of the variable in memory, if the value changes then it goes in and does
> whatever processing it needs to do.

Maybe you should use signals [signal(2)] to inform the process, this
way it can be done without polling.

	MfG
	bmg

-- 
"Des is völlig wurscht, was heut beschlos- | M G Berberich
 sen wird: I bin sowieso dagegn!"          | berberic@fmi.uni-passau.de
(SPD-Stadtrat Kurt Schindler; Regensburg)  | www.fmi.uni-passau.de/~berberic

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