Mercurial > p > roundup > code

annotate roundup/backends/portalocker.py @ 2929:7a8a02646d4e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
backend is an attribute of tracker instances
author Alexander Smishlajev <a1s@users.sourceforge.net>
date Thu, 18 Nov 2004 16:23:58 +0000
parents fc52d57c6c3e
children c648bebf021e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
1 # portalocker.py - Cross-platform (posix/nt) API for flock-style file locking.
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
2 # Requires python 1.5.2 or better.
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
3
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
4 # ID line added by richard for Roundup file tracking
2005
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
5 # $Id: portalocker.py,v 1.8 2004-02-11 23:55:09 richard Exp $
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
6
2005
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
7 """Cross-platform (posix/nt) API for flock-style file locking.
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
8
2005
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
9 Synopsis::
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
10
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
11 import portalocker
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
12 file = open("somefile", "r+")
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
13 portalocker.lock(file, portalocker.LOCK_EX)
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
14 file.seek(12)
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
15 file.write("foo")
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
16 file.close()
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
17
2005
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
18 If you know what you're doing, you may choose to::
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
19
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
20 portalocker.unlock(file)
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
21
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
22 before closing the file, but why?
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
23
2005
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
24 Methods::
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
25
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
26 lock( file, flags )
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
27 unlock( file )
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
28
2005
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
29 Constants::
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
30
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
31 LOCK_EX
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
32 LOCK_SH
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
33 LOCK_NB
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
34
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
35 I learned the win32 technique for locking files from sample code
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
36 provided by John Nielsen <nielsenjf@my-deja.com> in the documentation
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
37 that accompanies the win32 modules.
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
38
2005
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
39 :Author: Jonathan Feinberg <jdf@pobox.com>
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
40 :Version: Id: portalocker.py,v 1.3 2001/05/29 18:47:55 Administrator Exp
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
41 **un-cvsified by richard so the version doesn't change**
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
42 """
2005
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
43 __docformat__ = 'restructuredtext'
fc52d57c6c3e documentation cleanup
Richard Jones <richard@users.sourceforge.net>
parents: 1755
diff changeset
44
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
45 import os
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
46
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
47 if os.name == 'nt':
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
48 import win32con
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
49 import win32file
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
50 import pywintypes
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
51 LOCK_EX = win32con.LOCKFILE_EXCLUSIVE_LOCK
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
52 LOCK_SH = 0 # the default
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
53 LOCK_NB = win32con.LOCKFILE_FAIL_IMMEDIATELY
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
54 # is there any reason not to reuse the following structure?
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
55 __overlapped = pywintypes.OVERLAPPED()
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
56 elif os.name == 'posix':
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
57 import fcntl
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
58 LOCK_EX = fcntl.LOCK_EX
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
59 LOCK_SH = fcntl.LOCK_SH
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
60 LOCK_NB = fcntl.LOCK_NB
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
61 else:
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
62 raise RuntimeError("PortaLocker only defined for nt and posix platforms")
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
63
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
64 if os.name == 'nt':
1755
0e123e7c6ddc fixed 0xffff0000 literal. finally.
Richard Jones <richard@users.sourceforge.net>
parents: 1719
diff changeset
65 # eugh, we want 0xffff0000 here, but python 2.3 won't let us :(
0e123e7c6ddc fixed 0xffff0000 literal. finally.
Richard Jones <richard@users.sourceforge.net>
parents: 1719
diff changeset
66 FFFF0000 = -65536
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
67 def lock(file, flags):
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
68 hfile = win32file._get_osfhandle(file.fileno())
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
69 # LockFileEx is not supported on all Win32 platforms (Win95, Win98, WinME).
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
70 # If it's not supported, win32file will raise an exception.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
71 # Try LockFileEx first, as it has more functionality and handles
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
72 # blocking locks more efficiently.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
73 try:
1719
eeb167fb8faf *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 1459
diff changeset
74 win32file.LockFileEx(hfile, flags, 0, FFFF0000, __overlapped)
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
75 except win32file.error, e:
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
76 import winerror
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
77 # Propagate upwards all exceptions other than not-implemented.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
78 if e[0] != winerror.ERROR_CALL_NOT_IMPLEMENTED:
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
79 raise e
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
80
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
81 # LockFileEx is not supported. Use LockFile.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
82 # LockFile does not support shared locking -- always exclusive.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
83 # Care: the low/high length params are reversed compared to LockFileEx.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
84 if not flags & LOCK_EX:
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
85 import warnings
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
86 warnings.warn("PortaLocker does not support shared locking on Win9x", RuntimeWarning)
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
87 # LockFile only supports immediate-fail locking.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
88 if flags & LOCK_NB:
1719
eeb167fb8faf *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 1459
diff changeset
89 win32file.LockFile(hfile, 0, 0, FFFF0000, 0)
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
90 else:
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
91 # Emulate a blocking lock with a polling loop.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
92 import time
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
93 while 1:
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
94 # Attempt a lock.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
95 try:
1719
eeb167fb8faf *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 1459
diff changeset
96 win32file.LockFile(hfile, 0, 0, FFFF0000, 0)
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
97 break
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
98 except win32file.error, e:
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
99 # Propagate upwards all exceptions other than lock violation.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
100 if e[0] != winerror.ERROR_LOCK_VIOLATION:
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
101 raise e
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
102 # Sleep and poll again.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
103 time.sleep(0.1)
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
104 # TODO: should this return the result of the lock?
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
105
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
106 def unlock(file):
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
107 hfile = win32file._get_osfhandle(file.fileno())
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
108 # UnlockFileEx is not supported on all Win32 platforms (Win95, Win98, WinME).
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
109 # If it's not supported, win32file will raise an api_error exception.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
110 try:
1719
eeb167fb8faf *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 1459
diff changeset
111 win32file.UnlockFileEx(hfile, 0, FFFF0000, __overlapped)
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
112 except win32file.error, e:
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
113 import winerror
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
114 # Propagate upwards all exceptions other than not-implemented.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
115 if e[0] != winerror.ERROR_CALL_NOT_IMPLEMENTED:
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
116 raise e
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
117
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
118 # UnlockFileEx is not supported. Use UnlockFile.
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
119 # Care: the low/high length params are reversed compared to UnLockFileEx.
1719
eeb167fb8faf *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 1459
diff changeset
120 win32file.UnlockFile(hfile, 0, 0, FFFF0000, 0)
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
121
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
122 elif os.name =='posix':
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
123 def lock(file, flags):
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
124 fcntl.flock(file.fileno(), flags)
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
125 # TODO: should this return the result of the lock?
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
126
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
127 def unlock(file):
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
128 fcntl.flock(file.fileno(), fcntl.LOCK_UN)
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
129
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
130 if __name__ == '__main__':
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
131 from time import time, strftime, localtime
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
132 import sys
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
133 import portalocker
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
134
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
135 log = open('log.txt', "a+")
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
136 portalocker.lock(log, portalocker.LOCK_EX)
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
137
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
138 timestamp = strftime("%m/%d/%Y %H:%M:%S\n", localtime(time()))
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
139 log.write( timestamp )
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
140
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
141 print "Wrote lines. Hit enter to release lock."
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
142 dummy = sys.stdin.readline()
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
143
1387
e975db910d9f latest version of portalocker fixed for win98 and winnt, thanks James Kew
Richard Jones <richard@users.sourceforge.net>
parents: 1244
diff changeset
144 log.close()
690
509a101305da node ids are now generated from a lockable store - no more race conditions
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
145
Roundup Issue Tracker: http://roundup-tracker.org/