Mercurial > hg
view mercurial/lock.py @ 1562:2f97af0b522c
Fix walkhelper on windows.
The ''seen'' dictionary stores paths in canonical form,
so the walkhelp must also provide paths in that form,
otherwise the changed files are listed twice.
author | Christian Boos <cboos@neuf.fr> |
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date | Thu, 01 Dec 2005 10:48:18 -0600 |
parents | 59b3639df0a9 |
children | e6e70450edb9 |
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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(object): def __init__(self, file, wait=1, releasefn=None): self.f = file self.held = 0 self.wait = wait self.releasefn = releasefn 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 (OSError, IOError): raise LockHeld(util.readlock(self.f)) def release(self): if self.held: self.held = 0 if self.releasefn: self.releasefn() try: os.unlink(self.f) except: pass