Mercurial > hg > mercurial-crew-with-dirclash
view mercurial/lock.py @ 433:79c694462294
Add bdiff.blocks / minor performance tweaks
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Add bdiff.blocks / minor performance tweaks
This refactors bdiff.bdiff so that we can get a list of matching
blocks of line numbers for use by annotate/unidiff.
Minor performance tweaks:
- - add a field for equivalence so we can keep h around a bit longer for cmp
- - mix len into the hash to reduce collisions
- - move an operation into the slow path in longest_match
manifest hash: b1aee590b6291b31069ea8a86b6aa8fb259ac244
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (GNU/Linux)
iD8DBQFCubu2ywK+sNU5EO8RAm4FAJ9r10aJpT7qA96nqGYFHcuy4XcIHgCfeFx5
q0PyTXeZQc7Fw5kwEPcoykI=
=QXSb
-----END PGP SIGNATURE-----
author | mpm@selenic.com |
---|---|
date | Wed, 22 Jun 2005 11:27:50 -0800 |
parents | 688d03d6997a |
children | c6a2e41c8c60 |
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 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)