Path: utzoo!utgpu!water!watmath!clyde!rutgers!super.upenn.edu!grasp.cis.upenn.edu!shirono
From: shirono@grasp.cis.upenn.edu (Roberto Shironoshita)
Newsgroups: comp.emacs
Subject: Re: stop-editing-hook?
Message-ID: <3221@super.upenn.edu>
Date: 31 Jan 88 20:28:00 GMT
References: <8801271613.AA02607@RAVEN.LCS.MIT.EDU>
Sender: news@super.upenn.edu
Reply-To: shirono@grasp.cis.upenn.edu (Roberto Shironoshita)
Organization: University of Pennsylvania
Lines: 41

In article <8801271613.AA02607@RAVEN.LCS.MIT.EDU> bard@THEORY.LCS.MIT.EDU (Bard Bloom) writes:
>  Is there a hook which GNU emacs runs when a buffer is killed?

No.  kill-buffer is a primitive (i.e. written in C) defined in
buffer.c, and does not include a run-hooks.

> I am trying to write some functions which prevent more than one
> person from editing a file at a given time.  There are some
> primitives (lock-buffer and friends), but it looks as if I have to
> write some commands to manipulate them.  I can set up the locks
> without trouble, but I'd like to be able to take them off when the
> person stops editing the file -- preferably without forcing the
> person to leave emacs.

I have just been browsing through buffer.c, and noticed that the DEFUN
of kill-buffer has the following code:

	#ifdef CLASH_DETECTION
	  /* Unlock this buffer's file, if it is locked.  */
	  unlock_buffer (b);
	#endif /* CLASH_DETECTION */

So, since you mention you can lock files, I would presume kill-buffer
is already doing what you want.


                                   Roberto Shironoshita

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  @@@@@@@@@\         Full Name:    Roberto Shironoshita
   @@     @@         Occupation:   BSE candidate in Computer Science
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