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Re: Locking files for CLASH_DETECTION now supported on MS-Windows
From: |
Paul Eggert |
Subject: |
Re: Locking files for CLASH_DETECTION now supported on MS-Windows |
Date: |
Mon, 25 Feb 2013 19:23:07 -0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130221 Thunderbird/17.0.3 |
On 02/25/2013 06:43 PM, Daniel Colascione wrote:
> File creation is atomic. File deletion is atomic.
> The lock is signaled by the presence of the file, right?
Not in the recently-added MS-Windows implementation, no.
The lock is signaled by a nonempty file (approximately;
the details are a bit more complicated).
There are races where two Emacs instances can both
grab the lock simultaneously. For example, one Emacs
instance can call create_lock_file with !FORCE and another
with FORCE, and afterwards both Emacs instances
think they own the lock (and the lock file itself
says the !FORCE Emacs owns it).
- Locking files for CLASH_DETECTION now supported on MS-Windows, Eli Zaretskii, 2013/02/25
- Re: Locking files for CLASH_DETECTION now supported on MS-Windows, Paul Eggert, 2013/02/26
- Re: Locking files for CLASH_DETECTION now supported on MS-Windows, Eli Zaretskii, 2013/02/26
- Re: Locking files for CLASH_DETECTION now supported on MS-Windows, Eli Zaretskii, 2013/02/26
- Re: Locking files for CLASH_DETECTION now supported on MS-Windows, Eli Zaretskii, 2013/02/25
- Re: Locking files for CLASH_DETECTION now supported on MS-Windows, Paul Eggert, 2013/02/26
- Re: Locking files for CLASH_DETECTION now supported on MS-Windows, Eli Zaretskii, 2013/02/26
- Re: Locking files for CLASH_DETECTION now supported on MS-Windows, Eli Zaretskii, 2013/02/26