Mercurial > repos > shellac > guppy_basecaller
diff env/lib/python3.7/site-packages/lockfile/mkdirlockfile.py @ 5:9b1c78e6ba9c draft default tip
"planemo upload commit 6c0a8142489327ece472c84e558c47da711a9142"
author | shellac |
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date | Mon, 01 Jun 2020 08:59:25 -0400 |
parents | 79f47841a781 |
children |
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--- a/env/lib/python3.7/site-packages/lockfile/mkdirlockfile.py Thu May 14 16:47:39 2020 -0400 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,84 +0,0 @@ -from __future__ import absolute_import, division - -import time -import os -import sys -import errno - -from . import (LockBase, LockFailed, NotLocked, NotMyLock, LockTimeout, - AlreadyLocked) - - -class MkdirLockFile(LockBase): - """Lock file by creating a directory.""" - def __init__(self, path, threaded=True, timeout=None): - """ - >>> lock = MkdirLockFile('somefile') - >>> lock = MkdirLockFile('somefile', threaded=False) - """ - LockBase.__init__(self, path, threaded, timeout) - # Lock file itself is a directory. Place the unique file name into - # it. - self.unique_name = os.path.join(self.lock_file, - "%s.%s%s" % (self.hostname, - self.tname, - self.pid)) - - def acquire(self, timeout=None): - timeout = timeout if timeout is not None else self.timeout - end_time = time.time() - if timeout is not None and timeout > 0: - end_time += timeout - - if timeout is None: - wait = 0.1 - else: - wait = max(0, timeout / 10) - - while True: - try: - os.mkdir(self.lock_file) - except OSError: - err = sys.exc_info()[1] - if err.errno == errno.EEXIST: - # Already locked. - if os.path.exists(self.unique_name): - # Already locked by me. - return - 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: - # Someone else has the lock. - raise AlreadyLocked("%s is already locked" % - self.path) - time.sleep(wait) - else: - # Couldn't create the lock for some other reason - raise LockFailed("failed to create %s" % self.lock_file) - else: - open(self.unique_name, "wb").close() - return - - def release(self): - if not self.is_locked(): - raise NotLocked("%s is not locked" % self.path) - elif not os.path.exists(self.unique_name): - raise NotMyLock("%s is locked, but not by me" % self.path) - os.unlink(self.unique_name) - os.rmdir(self.lock_file) - - def is_locked(self): - return os.path.exists(self.lock_file) - - def i_am_locking(self): - return (self.is_locked() and - os.path.exists(self.unique_name)) - - def break_lock(self): - if os.path.exists(self.lock_file): - for name in os.listdir(self.lock_file): - os.unlink(os.path.join(self.lock_file, name)) - os.rmdir(self.lock_file)