Mercurial > hg
view mercurial/lock.py @ 422:10c43444a38e
[PATCH] Enables lock work under the other 'OS'
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[PATCH] Enables lock work under the other 'OS'
From: K Thananchayan <thananck@yahoo.com>
os.symlink is not supported under Windows. This patch
introduces util.mklockf, util.getlowner that use
regular files under Winodws but symlink under unix.
tweaked by mpm:
- changed function names
- fixed to work on UNIX
manifest hash: 6f650a78a3b203dcad2f861582500b6b4036599a
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author | mpm@selenic.com |
---|---|
date | Tue, 21 Jun 2005 19:43:40 -0800 |
parents | 0b4c5cb953d9 |
children | 688d03d6997a |
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# lock.py - simple locking scheme for mercurial # # Copyright 2005 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms # of the GNU General Public License, incorporated herein by reference. import os, time import util class LockHeld(Exception): pass class lock: def __init__(self, file, wait = 1): self.f = file self.held = 0 self.wait = wait self.lock() def __del__(self): self.release() def lock(self): while 1: try: self.trylock() return 1 except LockHeld, inst: if self.wait: time.sleep(1) continue raise inst def trylock(self): pid = os.getpid() try: util.makelock(str(pid), self.f) self.held = 1 except: raise LockHeld(util.readlock(self.f)) def release(self): if self.held: self.held = 0 os.unlink(self.f)