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Feb 6, 1999, 10:35pm

Ive got some multiple instance confusion going on here...I can seem to
kill my bird without killing the application...

heres were it seems to be troubled(AW_CHAT_MESSAGE handle):

if (aw_instance() == birde)
{
if (strncmp(message, "BYE BYE BLACKBIRD", 14) == 0)
{
aw_instance_set(birde);
aw_destroy();
}
}

I get the dreaded 'Memory oculd not be "read"' message and then the
application dies...anybody have an idea on hwo to fix this?

Feb 7, 1999, 9:42am

Are you sure its this section that gives trouble ? it seems fine to me. have
the bird say "i am leaving" before its aw_destroy() so you can see if it
reaches the destroy line or not.

Walter aka Faber

Abbot Pabisoko schrieb in Nachricht <36bcdfd3.0 at homer>...
> Ive got some multiple instance confusion going on here...I can seem to
>kill my bird without killing the application...
>
>heres were it seems to be troubled(AW_CHAT_MESSAGE handle):
>
> if (aw_instance() == birde)
> {
> if (strncmp(message, "BYE BYE BLACKBIRD", 14) == 0)
> {
> aw_instance_set(birde);
> aw_destroy();
> }
> }
>
>I get the dreaded 'Memory oculd not be "read"' message and then the
>application dies...anybody have an idea on hwo to fix this?
>
>

Feb 7, 1999, 7:32pm

I changed the code so now it looks like this:

if (aw_instance() == birde)
{
if (strncmp(message, "BYE BYE BLACKBIRD", 14) == 0)
{
aw_instance_set(birde);
aw_say("SQUAAWWWWKK!");
aw_destroy();
}
}

the bird squawks, then I get that message again...maybe im missing a
parameter in aw_destroy or something...


[View Quote]

Feb 8, 1999, 7:17am

Abbot, my solution in Delphi is to put birde back to zero once
destroyed. Then, in the main loop, you test:

If birde is different to zero, call the birde routines, otherwise skip
them. If you call them when there is no "birde" defined (you just
destroyed it), then you crash the program.

XelaG.

On Sun, 7 Feb 1999 16:32:31 -0500, "Abbot Pabisoko"
[View Quote] >I changed the code so now it looks like this:
>
> if (aw_instance() == birde)
> {
> if (strncmp(message, "BYE BYE BLACKBIRD", 14) == 0)
> {
> aw_instance_set(birde);
> aw_say("SQUAAWWWWKK!");
> aw_destroy();
> }
> }
>
>the bird squawks, then I get that message again...maybe im missing a
>parameter in aw_destroy or something...
>
>
[View Quote] --
Xelagot 46ADB [Delph]
creator: XelaG
email: decastro at cable.a2000.nl

Feb 8, 1999, 7:45am

It is an error to call aw_destroy() from within a callback. You are killing
the instance out from under the SDK while it is still processing events for
it. Sorry, this was not documented clearly in the SDK docs. I will update
them.

Arguably, the SDK should be able to handle this case, however that would
involve a significant amount of work. Perhaps in a future version...


-Roland

[View Quote]

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