Mercurial > hg > mercurial-crew-with-dirclash
view mercurial/lock.py @ 267:497aa6d276d2
Initial import of hgit and hgk
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Initial import of hgit and hgk
Support for git compatibility sufficient to run gitk on top of hg
repositories. This includes:
hgit diff-tree
hgit rev-list
hgit rev-tree
hgit cat-file
Signed-off-by: Chris Mason <mason@suse.com>
hgk is a slightly modified version of gitk1.1 from Paul Mackerras. It has
been changed to use hgit commands, and has support for the extended
rev-list -c to speed up the commit listing.
Signed-off-by: Chris Mason <mason@suse.com>
manifest hash: 5a4a27135bc85bab2a3a1e35018a08a985d8d146
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author | mpm@selenic.com |
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date | Tue, 07 Jun 2005 00:00:56 -0800 |
parents | 0b4c5cb953d9 |
children | 10c43444a38e 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 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)