Xref: news2.mv.net comp.os.msdos.djgpp:5313
From: neligan AT odyssee DOT net (Mitran Marcel)
Newsgroups: comp.os.msdos.djgpp
Subject: Hookingi nterrupts in C++
Date: Mon, 24 Jun 1996 14:22:01 GMT
Organization: Odyssee Internet
Lines: 26
Message-ID: <4qku2p$447@pegasus.odyssee.net>
Reply-To: neligan AT odyssee DOT net
NNTP-Posting-Host: pool28_11.odyssee.net
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Hi,

	I'm trying to write a simple program that hooks the timer interrupt in
C++. Here's my basic strutrure:

class TIMER{
	protected:
	volatile long ticks = 0;
	new_timer_handler();
	public:
	TIMER();
	~TIMER();
};

The constructor hooks the interrupt while the destructor unhooks it,
no problem. However, since the new_timer_handler() is invoked by the
interrupt, it doesn't get passed a this pointer right? So I am then
unable to reference the ticks variable since I don't know for which
specific instance of the object the interrupt has hooked. Does anyone
know a way how to solve this, I'm relatively new to C++.

Thanks,

Patrick Mitran
neligan AT odyssee DOT net