← Back to branch summary

~bzr-pqm/bzr/bzr.dev

« back to all changes in this revision

Viewing changes to bzrlib/lock.py

  • Committer: Patch Queue Manager
  • Date: 2016-01-15 09:21:49 UTC
  • mfrom: (6606.2.1 autodoc-unicode)
  • Revision ID: pqm@pqm.ubuntu.com-20160115092149-z5f4sfq3jvaz0enb
(vila) Fix autodoc runner when LANG=C. (Jelmer Vernooij)

Show diffs side-by-side

added added

removed removed

Lines of Context:
bzrlib/lock.py
14
14
# along with this program; if not, write to the Free Software
15
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16
16
 
17
 
 
18
17
"""Locking using OS file locks or file existence.
19
18
 
20
19
Note: This method of locking is generally deprecated in favour of LockDir, but
34
33
unlock() method.
35
34
"""
36
35
 
 
36
from __future__ import absolute_import
 
37
 
 
38
import contextlib
37
39
import errno
38
40
import os
39
41
import sys
45
47
    osutils,
46
48
    trace,
47
49
    )
48
 
from bzrlib.hooks import HookPoint, Hooks
49
 
 
 
50
from bzrlib.hooks import Hooks
 
51
from bzrlib.i18n import gettext
50
52
 
51
53
class LockHooks(Hooks):
52
54
 
53
55
    def __init__(self):
54
 
        Hooks.__init__(self)
55
 
        self.create_hook(HookPoint('lock_acquired',
56
 
            "Called with a bzrlib.lock.LockResult when a physical lock is "
57
 
            "acquired.", (1, 8), None))
58
 
        self.create_hook(HookPoint('lock_released',
59
 
            "Called with a bzrlib.lock.LockResult when a physical lock is "
60
 
            "released.", (1, 8), None))
61
 
        self.create_hook(HookPoint('lock_broken',
62
 
            "Called with a bzrlib.lock.LockResult when a physical lock is "
63
 
            "broken.", (1, 15), None))
 
56
        Hooks.__init__(self, "bzrlib.lock", "Lock.hooks")
 
57
        self.add_hook('lock_acquired',
 
58
            "Called with a bzrlib.lock.LockResult when a physical lock is "
 
59
            "acquired.", (1, 8))
 
60
        self.add_hook('lock_released',
 
61
            "Called with a bzrlib.lock.LockResult when a physical lock is "
 
62
            "released.", (1, 8))
 
63
        self.add_hook('lock_broken',
 
64
            "Called with a bzrlib.lock.LockResult when a physical lock is "
 
65
            "broken.", (1, 15))
64
66
 
65
67
 
66
68
class Lock(object):
171
173
            self.f.close()
172
174
            self.f = None
173
175
 
174
 
    def __del__(self):
175
 
        if self.f:
176
 
            from warnings import warn
177
 
            warn("lock on %r not released" % self.f)
178
 
            self.unlock()
179
 
 
180
176
    def unlock(self):
181
177
        raise NotImplementedError()
182
178
 
541
537
    locked the same way), and -Drelock is set, then this will trace.note a
542
538
    message about it.
543
539
    """
544
 
    
 
540
 
545
541
    _prev_lock = None
546
542
 
547
543
    def _note_lock(self, lock_type):
550
546
                type_name = 'read'
551
547
            else:
552
548
                type_name = 'write'
553
 
            trace.note('%r was %s locked again', self, type_name)
 
549
            trace.note(gettext('{0!r} was {1} locked again'), self, type_name)
554
550
        self._prev_lock = lock_type
555
551
 
 
552
@contextlib.contextmanager
 
553
def write_locked(lockable):
 
554
    lockable.lock_write()
 
555
    try:
 
556
        yield lockable
 
557
    finally:
 
558
        lockable.unlock()