Mercurial > hg > mercurial-crew-with-dirclash
view mercurial/lock.py @ 197:b388603984fc
hgweb: add view-only support
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
hgweb: add view-only support
Turning on hgweb.viewonly prevents pulls. This is a good idea for
machines with limited CPU/bandwidth.
manifest hash: 68d1d04dad83743f3326e8b4f2e51387787f06c0
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (GNU/Linux)
iD8DBQFCm0tnywK+sNU5EO8RAm1fAJ9rNjWOr+e3UosFyauBSEgyie8meACeKwjc
QqbfuXPLg/+TKr2HIrC3DA4=
=i8Yj
-----END PGP SIGNATURE-----
author | mpm@selenic.com |
---|---|
date | Mon, 30 May 2005 09:20:39 -0800 |
parents | 0b4c5cb953d9 |
children | 10c43444a38e 688d03d6997a |
line wrap: on
line source
# 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 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: os.symlink(str(pid), self.f) self.held = 1 except: raise LockHeld(os.readlink(self.f)) def release(self): if self.held: self.held = 0 os.unlink(self.f)