[openbeos] Re: input_server filter issue
- From: Michael Phipps <mphipps1@xxxxxxxxxxxxxxxx>
- To: openbeos@xxxxxxxxxxxxx
- Date: Wed, 17 Mar 2004 22:33:51 -0500
Jérôme -
That is a very good catch of a race condition (it shouldn't happen - the
lowest time it can take for a SS to get invoked is 30 seconds, but still...)
I fixed it, as you suggested, but the input_server still crashes.
Any other ideas?
On 2004-03-17 at 05:54:06 [-0500], Jérôme Duval wrote:
> Hi Michael,
>
> I have a idea which can happen to be your problem. Let me explain :
>
> Your BMessageFilter is installed in your SSISFilter::SSISFilter() with
> AddFilter().
> But SSISFilter *fltr is still NULL, not inited, when timeUpFunc may be
> called.
>
> One thing you can try :
>
> SSISFilter *fltr = NULL;
>
> if (fltr)
> fltr->CheckTime();
>
> i also have a doubt about having be_app and be_app_messenger available in a
> loaded addon, but why not.
>
> Hope it helps,
> Jerome
>
> Selon Michael Phipps <mphipps1@xxxxxxxxxxxxxxxx>:
>
> > I have been working on an input server filter for ScreenSaver. The
general
> > gist of it is that we add a BMessageRunner to the input_server. It's job
is
> > to post a message to the Input Server every N seconds (where N is what
you
> > set in the screen saver preferences app). A BMessageFilter catches that
> > message and calls a function checking to see if keys were hit and, if
not,
> > to
> >
> > invoke screensaver.
> >
> > Now, I am sure that I have done something dumb... But my problem is that
> > when
> >
> > I create a BMessageFilter and call be_app->AddFilter(filter); At that
> > point, the Input Server crashes. So, obviously, I can't do a whole lot of
> > debugging.
> >
> > I can verify that be_app seems to be valid (and it should be). I can't
think
> >
> > of any reason that this should fail.
> >
> > Here is the relevant code:
> >
> > SSISFilter::SSISFilter() : enabled(false) {
> > pref.LoadSettings();
> > blank=pref.GetBlankCorner();
> > keep=pref.GetNeverBlankCorner();
> > timeMsg=new BMessage(timeUp);
> > runner=new BMessageRunner(be_app_messenger, timeMsg, pref.BlankTime()
> > *1000000,-1);
> > filter=new BMessageFilter(timeUp,timeUpFunc);
> > be_app->AddFilter(filter);
> > }
> >
> > I am open to thoughts and ideas...
> >
>
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