Re: Ada/X Windows Newbie Problem

[jsa@alexandria (Jon S Anthony)]

In article <53g3e1$fj5@curlew.mtx.net.au> scurtis@dove.mtx.net.au (Scott D. Curtis) writes:

>    hWnd := Xt.Intrinsic.XtVaCreateManagedWidget(
>               "pushme",
>               Motif.Pushb.XmPushButtonWidgetClass_obj,
>              parent,
>             Stdarg.Empty & Motif.xmstrdefs.XmNlabelString & label & Nulst
>         );
> 
>    where parent is of type Widget, label is of type Motif.Xm.XmString.
....
> calls made by this function, I believe that the underlying C function
> in Xlib is failing with one of the pointer values

Almost certainly.  On the face of it, it looks about right.  Have you
assigned label and parent???


>    Can anyone suggest why the following statement is raising a STORAGE_ERROR:

To any ACT folk (or other GNAT savvy folk):

I've noticed that GNAT (tries?) to raise Storage_Error in this sort of
case (bad pointer dereference attempt in imported code), though it is
not always successful.  Is this (the "catching" of the segv and
raising of SE) by design or accidental in some way?

/Jon
-- 
Jon Anthony
Organon Motives, Inc.
1 Williston Road, Suite 4
Belmont, MA 02178

617.484.3383
jsa@organon.com