summaryrefslogtreecommitdiffstats
path: root/external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py
diff options
context:
space:
mode:
authorHanoh Haim <hhaim@cisco.com>2015-08-26 15:33:20 +0300
committerHanoh Haim <hhaim@cisco.com>2015-08-26 15:33:20 +0300
commitf15923902c4259978b952ed4b6aef2db4c9f430b (patch)
tree27e26627964bab4bd020e696a6d6f71d77515d04 /external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py
parentfc46f2618332037a8c1b58fbce5d616033bff1c9 (diff)
remove old python
Diffstat (limited to 'external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py')
-rw-r--r--external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py69
1 files changed, 0 insertions, 69 deletions
diff --git a/external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py b/external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py
deleted file mode 100644
index 57551a36..00000000
--- a/external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py
+++ /dev/null
@@ -1,69 +0,0 @@
-from __future__ import absolute_import
-
-import time
-import os
-
-from . import (LockBase, LockFailed, NotLocked, NotMyLock, LockTimeout,
- AlreadyLocked)
-
-class SymlinkLockFile(LockBase):
- """Lock access to a file using symlink(2)."""
-
- def __init__(self, path, threaded=True, timeout=None):
- # super(SymlinkLockFile).__init(...)
- LockBase.__init__(self, path, threaded, timeout)
- # split it back!
- self.unique_name = os.path.split(self.unique_name)[1]
-
- def acquire(self, timeout=None):
- # Hopefully unnecessary for symlink.
- #try:
- # open(self.unique_name, "wb").close()
- #except IOError:
- # raise LockFailed("failed to create %s" % self.unique_name)
- timeout = timeout is not None and timeout or self.timeout
- end_time = time.time()
- if timeout is not None and timeout > 0:
- end_time += timeout
-
- while True:
- # Try and create a symbolic link to it.
- try:
- os.symlink(self.unique_name, self.lock_file)
- except OSError:
- # Link creation failed. Maybe we've double-locked?
- if self.i_am_locking():
- # Linked to out unique name. Proceed.
- return
- else:
- # Otherwise the lock creation failed.
- if timeout is not None and time.time() > end_time:
- if timeout > 0:
- raise LockTimeout("Timeout waiting to acquire"
- " lock for %s" %
- self.path)
- else:
- raise AlreadyLocked("%s is already locked" %
- self.path)
- time.sleep(timeout/10 if timeout is not None else 0.1)
- else:
- # Link creation succeeded. We're good to go.
- return
-
- def release(self):
- if not self.is_locked():
- raise NotLocked("%s is not locked" % self.path)
- elif not self.i_am_locking():
- raise NotMyLock("%s is locked, but not by me" % self.path)
- os.unlink(self.lock_file)
-
- def is_locked(self):
- return os.path.islink(self.lock_file)
-
- def i_am_locking(self):
- return os.path.islink(self.lock_file) and \
- os.readlink(self.lock_file) == self.unique_name
-
- def break_lock(self):
- if os.path.islink(self.lock_file): # exists && link
- os.unlink(self.lock_file)