/usr/lib/python3/dist-packages/subliminal/cache.py is in python3-subliminal 0.7.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | # -*- coding: utf-8 -*-
import inspect
from dogpile.cache import make_region # @UnresolvedImport
from dogpile.cache.backends.file import AbstractFileLock # @UnresolvedImport
from dogpile.cache.compat import string_type # @UnresolvedImport
from dogpile.core.readwrite_lock import ReadWriteMutex # @UnresolvedImport
#: Subliminal's cache version
CACHE_VERSION = 1
def subliminal_key_generator(namespace, fn, to_str=string_type):
"""Add a :data:`CACHE_VERSION` to dogpile.cache's default function_key_generator"""
if namespace is None:
namespace = '%d:%s:%s' % (CACHE_VERSION, fn.__module__, fn.__name__)
else:
namespace = '%d:%s:%s|%s' % (CACHE_VERSION, fn.__module__, fn.__name__, namespace)
args = inspect.getargspec(fn)
has_self = args[0] and args[0][0] in ('self', 'cls')
def generate_key(*args, **kw):
if kw:
raise ValueError('Keyword arguments not supported')
if has_self:
args = args[1:]
return namespace + '|' + ' '.join(map(to_str, args))
return generate_key
class MutexLock(AbstractFileLock):
""":class:`MutexLock` is a thread-based rw lock based on :class:`dogpile.core.ReadWriteMutex`"""
def __init__(self, filename):
self.mutex = ReadWriteMutex()
def acquire_read_lock(self, wait):
ret = self.mutex.acquire_read_lock(wait)
return wait or ret
def acquire_write_lock(self, wait):
ret = self.mutex.acquire_write_lock(wait)
return wait or ret
def release_read_lock(self):
return self.mutex.release_read_lock()
def release_write_lock(self):
return self.mutex.release_write_lock()
#: The dogpile.cache region (long-lived)
region = make_region(function_key_generator=subliminal_key_generator)
#: The dogpile.cache region for :meth:`~subliminal.providers.Provider.query` (short-lived)
query_region = make_region(function_key_generator=subliminal_key_generator)
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