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From: Michael Peppler <mpeppler at mbay dot net>
Subject: Re: ct_callback
Date: Dec 29 1997 10:03PM
Ronald Page wrote:
> I'm attempting to use CT_CALLBACK to register a callback routine for
> CS_CLIENTMSG_CB and CS_SERVERMSG_CB. This is an attempt to get return
> code information for a failed trigger. The problem is that my callback
> routines never get called. Here are the statements I use (which
> apparently have no error):
> $old_client_cb = ct_callback(CS_CLIENTMSG_CB, "clientCallback");
> $old_server_cb = ct_callback(CS_SERVERMSG_CB, "serverCallback");
> I also have two subroutines named "clientCallback" and "serverCallback".
> The code in those subroutines is similar to the example in the SybPerl
> CTLib documentation.
This works fine for me with the server callback defined in ctutil.pl.
Maybe you have an error in the way the callback is coded.
I can also see an other potential problem. You are passing the
callback names as strings to ct_callback, instead of as references,
and it seems that ct_callback silently ignores the call if it
can't find the subroutine (by name), maybe because it was coded in
a different package.
You should probably code it this way:
$old_server_cb = ct_callback(CS_SERVERMSG_CB, \&serverCallback);
ie pass a reference to the sub to ct_callback instead of passing its
Michael Peppler -||- Data Migrations Inc.
email@example.com -||- http://www.mbay.net/~mpeppler