Mercurial > hg
view mercurial/lock.py @ 611:48c3eb2bf844
* clean up error handling when user requests to use a non file object
# HG changeset patch
# User shaleh@speakeasy.net
# Node ID 1ae21732349f5b6dba2941609a044d9c365a6fb2
# Parent 94744f6fe0e7c19b10fab7eb24249f3eeaa5489a
* clean up error handling when user requests to use a non file object
- use os.path.exists() to verify the item exists
- use os.path.isfile() to check whether the item is a file or not
diff -r 94744f6fe0e7 -r 1ae21732349f mercurial/hg.py
author | shaleh@speakeasy.net |
---|---|
date | Mon, 04 Jul 2005 11:20:20 -0800 |
parents | 03f27b1381f9 |
children | 5ca319a641e1 574869103985 |
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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 try: os.unlink(self.f) except: pass