def wrapper(self, *args, **kwargs):
with Lock(self):
assert getvar(self, '__withas__', d=0) == i and setvar(
self, '__withas__', i + 1)
try:
return function(self, *args, **kwargs)
except BaseException:
with Lock(self):
assert setvar(self, '__withas__', -1)
raise
def __throw(self):
generics = self.generics
while isinstance(generics, Closure):
generics = generics()
if inspect.ismodule(generics):
name = '__THROW__'
elif inspect.isclass(generics):
name = '__Throw__'
else:
name = '__throw__'
assert hasvar(generics, name) or setvar(generics, name, set())
return getvar(generics, name)
def __lock(self):
generics = self.generics
k = self.k
while isinstance(generics, Closure):
generics = generics()
if inspect.ismodule(generics):
name = '__LOCK__'
elif inspect.isclass(generics):
name = '__Lock__'
else:
name = '__lock__'
with Lock.LOCK:
assert hasvar(generics, name) or setvar(generics, name, dict())
var = getvar(generics, name)
if k not in var:
var[k] = threading.RLock()
return var[k]
def __new__(mcls, *args, **kwargs):
if mcls is __class__:
sid = pickle.dumps((
args,
sorted(kwargs.items(), key=lambda i: i[0]),
))
with Lock(instance):
assert hasvar(instance, '__instance__') or setvar(
instance, '__instance__', dict())
INSTANCES = getvar(instance, '__instance__')
if cid not in INSTANCES:
INSTANCES[cid] = dict()
instances = INSTANCES[cid]
if sid not in instances:
instances[sid] = super_new(mcls)(mcls, *args, **kwargs)
return instances[sid]
else:
return super_new(mcls)(mcls, *args, **kwargs)
def Cursor(connect):
assert hasvar(connect, '_cursors') or setvar(connect, '_cursors', set())
var = getvar(connect, '_cursors')
cursor = connect.cursor(cursor=pymysql.cursors.DictCursor)
var.add(cursor)
try:
yield cursor
except BaseException:
var.remove(cursor)
if not var:
connect.rollback()
cursor.close()
raise
else:
var.remove(cursor)
if not var:
connect.commit()
cursor.close()
def __init__(self, *args, **kwargs):
if type(self) is __class__:
with Lock(self):
with Lock(instance):
instances = getvar(instance, '__instance__')[cid]
assert self in instances.values()
try:
assert hasvar(self, '__old__') or setvar(
self, '__old__',
super_init(self)(*args, **kwargs))
return getvar(self, '__old__')
except BaseException:
with Lock(instance):
for k in tuple(instances.keys()):
if instances[k] is self:
del instances[k]
raise
else:
return super_init(self)(*args, **kwargs)
def decorator(__class__):
cid = unique()
def super_init(self, var=getvar(__class__, '__init__')):
if var is not None:
var = var.__get__(self, type(self))
else:
var = super(__class__, self).__init__
if getattr(var, '__objclass__', None) is object:
var = lambda self, *args, **kwargs: object.__init__(
self, *args, **kwargs)
return var
def __init__(self, *args, **kwargs):
if type(self) is __class__:
with Lock(self):
with Lock(instance):
instances = getvar(instance, '__instance__')[cid]
assert self in instances.values()
try:
assert hasvar(self, '__old__') or setvar(
self, '__old__',
super_init(self)(*args, **kwargs))
return getvar(self, '__old__')
except BaseException:
with Lock(instance):
for k in tuple(instances.keys()):
if instances[k] is self:
del instances[k]
raise
else:
return super_init(self)(*args, **kwargs)
assert setvar(__class__, '__init__', __init__)
def super_new(mcls, var=getvar(__class__, '__new__')):
if var is not None:
var = var.__get__(None, mcls)
else:
var = super(__class__, mcls).__new__
if getattr(var, '__self__', None) is object:
var = lambda mcls, *args, **kwargs: object.__new__(mcls)
return var
def __new__(mcls, *args, **kwargs):
if mcls is __class__:
sid = pickle.dumps((
args,
sorted(kwargs.items(), key=lambda i: i[0]),
))
with Lock(instance):
assert hasvar(instance, '__instance__') or setvar(
instance, '__instance__', dict())
INSTANCES = getvar(instance, '__instance__')
if cid not in INSTANCES:
INSTANCES[cid] = dict()
instances = INSTANCES[cid]
if sid not in instances:
instances[sid] = super_new(mcls)(mcls, *args, **kwargs)
return instances[sid]
else:
return super_new(mcls)(mcls, *args, **kwargs)
assert setvar(__class__, '__new__', __new__)
return __class__
if getattr(var, '__self__', None) is object:
var = lambda mcls, *args, **kwargs: object.__new__(mcls)
return var
def __new__(mcls, *args, **kwargs):
if mcls is __class__:
sid = pickle.dumps((
args,
sorted(kwargs.items(), key=lambda i: i[0]),
))
with Lock(instance):
assert hasvar(instance, '__instance__') or setvar(
instance, '__instance__', dict())
INSTANCES = getvar(instance, '__instance__')
if cid not in INSTANCES:
INSTANCES[cid] = dict()
instances = INSTANCES[cid]
if sid not in instances:
instances[sid] = super_new(mcls)(mcls, *args, **kwargs)
return instances[sid]
else:
return super_new(mcls)(mcls, *args, **kwargs)
assert setvar(__class__, '__new__', __new__)
return __class__
return decorator
atexit.register(lambda: setvar(instance, '__instance__', None))