Xref:	news2.mv.net comp.os.msdos.djgpp:3682
From:	snarfy AT goodnet DOT com
Newsgroups:	comp.os.msdos.djgpp
Subject:	___djgpp_exception_state_number?
Date:	11 May 1996 01:25:47 GMT
Organization:	GoodNet
Lines:	25
Message-ID:	<4n0qar$jso@news1.goodnet.com>
NNTP-Posting-Host:	goodnet.com
Keywords:	exception signal thread
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I've written (with a lot of help, thanks Malcolm) a timer routine that 
generates exceptions with an exception number "MY_EXCP_NUM" and I'm 
handling these exceptions with  signal(SIGILL, my_exception_handler).  The
problem is that I need to find out if its my exception or the 'real' exception
that generated the SIGILL.  Example:

void (*old_exception_handler)(int);
old_exception_handler = signal(SIGILL, my_exception_handler);
void my_exception_handler(int signum)
{
     if(___djgpp_exception_state_number == MY_EXCP_NUM)
        {
         do some stuff...
        }
     else
       old_exception_handler(signum);

}

I can't seem to find the variable that holds the exception number, so I'm
stuck.  It's not in `info libc.a Alphabetical'.  Thanks


Josh

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