From: Eli Zaretskii <eliz@gnu.org>
To: Paul Eggert <eggert@cs.ucla.edu>
Cc: emacs-devel@gnu.org
Subject: Re: Locking files for CLASH_DETECTION now supported on MS-Windows
Date: Tue, 26 Feb 2013 06:02:36 +0200 [thread overview]
Message-ID: <83d2vniuxv.fsf@gnu.org> (raw)
In-Reply-To: <512C17E1.7040307@cs.ucla.edu>
> Date: Mon, 25 Feb 2013 18:03:13 -0800
> From: Paul Eggert <eggert@cs.ucla.edu>
> CC: emacs-devel@gnu.org
>
> One other thought. Part of the reason GNU/POSIXish hosts use
> symbolic links is that readlink, symlink and unlink
> are atomic operations. They let Emacs atomically create
> a lock, test whether a lock exists, and remove a lock. This
> doesn't seem to be true of the new MS-Windows implementation,
> which uses open+write+close to create a lock and open+read+close
> to test whether a lock exists, neither of which is atomic.
> Is there some way this can be done atomically on MS-Windows?
Why is that important? On Windows, as long as a file is open, no
other application can write to it or remove the file. Is that the
"atomic" nature you wanted?
> Are readlink, symlink, and unlink atomic on MS-Windows?
Please define "atomic" for these cases, and I will think about that.
next prev parent reply other threads:[~2013-02-26 4:02 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-25 17:43 Locking files for CLASH_DETECTION now supported on MS-Windows Eli Zaretskii
2013-02-25 18:05 ` Paul Eggert
2013-02-25 18:41 ` Eli Zaretskii
2013-02-25 18:56 ` Paul Eggert
2013-02-26 2:03 ` Paul Eggert
2013-02-26 2:43 ` Daniel Colascione
2013-02-26 3:23 ` Paul Eggert
2013-02-26 4:02 ` Eli Zaretskii [this message]
2013-02-26 4:28 ` Daniel Colascione
2013-02-26 17:45 ` Eli Zaretskii
2013-02-26 6:05 ` Paul Eggert
2013-02-26 18:41 ` Eli Zaretskii
2013-02-26 18:51 ` Eli Zaretskii
2013-02-26 4:00 ` Eli Zaretskii
2013-02-26 5:46 ` Paul Eggert
2013-02-26 18:02 ` Eli Zaretskii
2013-02-26 18:17 ` Eli Zaretskii
2013-02-26 22:34 ` Paul Eggert
2013-02-27 4:01 ` Eli Zaretskii
2013-02-27 7:45 ` Paul Eggert
2013-02-27 19:02 ` Eli Zaretskii
2013-02-27 19:01 ` Eli Zaretskii
2013-02-25 19:39 ` Glenn Morris
2013-02-25 19:43 ` Eli Zaretskii
2013-02-25 20:35 ` Stefan Monnier
2013-02-25 22:49 ` Paul Eggert
2013-02-26 3:49 ` Eli Zaretskii
2013-02-26 12:56 ` Richard Stallman
2013-02-26 3:40 ` Eli Zaretskii
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