Re: A programming puzzle with buffer-local hooks

[martin rudalics]

> I can think of two other tricks: reference counting (every time the
> mode is disabled, check whether it's enabled anywhere else), and never
> removing the hook.

I would use reference counting with an increment call when the mode is
enabled in a buffer and a decrement call run by ‘kill-buffer-hook’ and
when the mode gets disabled in a buffer.  Obviously, the function on
‘kill-buffer-hook’ should be removed together with the other functions
when that count drops to zero.

martin