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102 lines
2.7 KiB
Python
102 lines
2.7 KiB
Python
5 years ago
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# -*- coding: utf-8 -*-
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# copyright 2018 gevent. See LICENSE
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"""
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Maintains the thread local hub.
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"""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from gevent._compat import thread_mod_name
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__all__ = [
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'get_hub',
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'get_hub_noargs',
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'get_hub_if_exists',
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]
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# These must be the "real" native thread versions,
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# not monkey-patched.
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# We are imported early enough (by gevent/__init__) that
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# we can rely on not being monkey-patched in any way yet.
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class _Threadlocal(__import__(thread_mod_name)._local):
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def __init__(self):
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# Use a class with an initializer so that we can test
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# for 'is None' instead of catching AttributeError, making
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# the code cleaner and possibly solving some corner cases
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# (like #687)
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super(_Threadlocal, self).__init__()
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self.Hub = None
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self.loop = None
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self.hub = None
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_threadlocal = _Threadlocal()
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Hub = None # Set when gevent.hub is imported
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def get_hub_class():
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"""Return the type of hub to use for the current thread.
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If there's no type of hub for the current thread yet, 'gevent.hub.Hub' is used.
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"""
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hubtype = _threadlocal.Hub
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if hubtype is None:
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hubtype = _threadlocal.Hub = Hub
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return hubtype
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def set_default_hub_class(hubtype):
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global Hub
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Hub = hubtype
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def get_hub(*args, **kwargs): # pylint:disable=unused-argument
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"""
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Return the hub for the current thread.
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If a hub does not exist in the current thread, a new one is
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created of the type returned by :func:`get_hub_class`.
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.. deprecated:: 1.3b1
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The ``*args`` and ``**kwargs`` arguments are deprecated. They were
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only used when the hub was created, and so were non-deterministic---to be
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sure they were used, *all* callers had to pass them, or they were order-dependent.
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Use ``set_hub`` instead.
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.. versionchanged:: 1.5a3
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The *args* and *kwargs* arguments are now completely ignored.
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"""
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return get_hub_noargs()
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def get_hub_noargs():
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# Just like get_hub, but cheaper to call because it
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# takes no arguments or kwargs. See also a copy in
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# gevent/greenlet.py
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hub = _threadlocal.hub
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if hub is None:
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hubtype = get_hub_class()
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hub = _threadlocal.hub = hubtype()
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return hub
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def get_hub_if_exists():
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"""Return the hub for the current thread.
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Return ``None`` if no hub has been created yet.
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"""
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return _threadlocal.hub
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def set_hub(hub):
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_threadlocal.hub = hub
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def get_loop():
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return _threadlocal.loop
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def set_loop(loop):
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_threadlocal.loop = loop
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from gevent._util import import_c_accel
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import_c_accel(globals(), 'gevent.__hub_local')
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