Re: How do I initialize globalized minor mode only once?

[Barry Margolin <barmar@alum.mit.edu>]

In article <mailman.4534.1341975266.855.help-gnu-emacs@gnu.org>,
 Dmitry Gutov <dgutov@yandex.ru> wrote:

> Hi all,
> 
> I have written a globalized minor mode which has a relatively costly
> initialization (external process call), which I need to do when the mode
> is enabled.
> 
> But the turn-on function is getting called twice for each new opened
> buffer, once in default major mode, and once in the final major mode.
> 
> What's the best way to turn on the minor mode only once?
> Currently I'm comparing major-mode value to the default value, but
> that's probably not the best solution, since the minor mode in question
> can apply to some fundamental-mode (or other default mode) buffers, too.

Why not just set a variable saying whether you've done the 
initialization:

(defvar *my-mode-initialized* nil)
...

  (if (not *my-mode-initialized*)
      (progn
        ... 
        (setq *my-mode-initialized* t)))

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***