Mercurial > public > mercurial-scm > hg-stable
annotate mercurial/lock.py @ 704:5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
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Make makelock and readlock work on filesystems without symlink support.
This way you can have a repository on a fat partiton, e.g. a USB stick.
manifest hash: cea2c120ef2b25a50c5d98b59648f773feefe470
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| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Thu, 14 Jul 2005 22:51:47 +0100 |
| parents | 03f27b1381f9 |
| children | 574869103985 |
| 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 | |
|
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[PATCH] Enables lock work under the other 'OS'
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diff
changeset
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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 | |
| 515 | 34 |
| 161 | 35 def trylock(self): |
| 36 pid = os.getpid() | |
| 37 try: | |
|
422
10c43444a38e
[PATCH] Enables lock work under the other 'OS'
mpm@selenic.com
parents:
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diff
changeset
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38 util.makelock(str(pid), self.f) |
| 161 | 39 self.held = 1 |
|
704
5ca319a641e1
Make makelock and readlock work on filesystems without symlink support.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
515
diff
changeset
|
40 except (OSError, IOError): |
|
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 | |
|
503
c6a2e41c8c60
Fix troubles with clone and exception handling
mpm@selenic.com
parents:
429
diff
changeset
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46 try: |
|
c6a2e41c8c60
Fix troubles with clone and exception handling
mpm@selenic.com
parents:
429
diff
changeset
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47 os.unlink(self.f) |
|
c6a2e41c8c60
Fix troubles with clone and exception handling
mpm@selenic.com
parents:
429
diff
changeset
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48 except: pass |
| 161 | 49 |