Mercurial > hg > pyhgsh
annotate mercurial/lock.py @ 429:688d03d6997a
Pull from TAH
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Pull from TAH
manifest hash: 600d04efbd836d555d11a3bd9d821d1d8c0a9790
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (GNU/Linux)
iD8DBQFCuPFxywK+sNU5EO8RAjfzAKC18Zc2EOkXhy1zcpgGnyPHnFMdmgCfW5Ut
I5HSWqZMt8H0WJx1Or7ajNc=
=27D5
-----END PGP SIGNATURE-----
| author | mpm@selenic.com |
|---|---|
| date | Tue, 21 Jun 2005 21:04:49 -0800 |
| parents | 10c43444a38e 0b4c5cb953d9 |
| children | c6a2e41c8c60 |
| rev | line source |
|---|---|
| 161 | 1 # lock.py - simple locking scheme for mercurial |
| 2 # | |
| 3 # Copyright 2005 Matt Mackall <mpm@selenic.com> | |
| 4 # | |
| 5 # This software may be used and distributed according to the terms | |
| 6 # of the GNU General Public License, incorporated herein by reference. | |
| 7 | |
| 8 import os, time | |
|
422
10c43444a38e
[PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents:
161
diff
changeset
|
9 import util |
| 161 | 10 |
| 11 class LockHeld(Exception): | |
| 12 pass | |
| 13 | |
| 14 class lock: | |
| 15 def __init__(self, file, wait = 1): | |
| 16 self.f = file | |
| 17 self.held = 0 | |
| 18 self.wait = wait | |
| 19 self.lock() | |
| 20 | |
| 21 def __del__(self): | |
| 22 self.release() | |
| 23 | |
| 24 def lock(self): | |
| 25 while 1: | |
| 26 try: | |
| 27 self.trylock() | |
| 28 return 1 | |
| 29 except LockHeld, inst: | |
| 30 if self.wait: | |
| 31 time.sleep(1) | |
| 32 continue | |
| 33 raise inst | |
| 34 | |
| 35 def trylock(self): | |
| 36 pid = os.getpid() | |
| 37 try: | |
|
422
10c43444a38e
[PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents:
161
diff
changeset
|
38 util.makelock(str(pid), self.f) |
| 161 | 39 self.held = 1 |
| 40 except: | |
|
422
10c43444a38e
[PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents:
161
diff
changeset
|
41 raise LockHeld(util.readlock(self.f)) |
| 161 | 42 |
| 43 def release(self): | |
| 44 if self.held: | |
| 45 self.held = 0 | |
| 46 os.unlink(self.f) | |
| 47 |