# gevent

# Source code for gevent._hub_local

    # -*- coding: utf-8 -*-
    # copyright 2018 gevent. See LICENSE
    """
    Maintains the thread local hub.

    """
    from __future__ import absolute_import
    from __future__ import division
    from __future__ import print_function

    from gevent._compat import thread_mod_name

    __all__ = [
        'get_hub',
        'get_hub_noargs',
        'get_hub_if_exists',
    ]

    # These must be the "real" native thread versions,
    # not monkey-patched.
    # We are imported early enough (by gevent/__init__) that
    # we can rely on not being monkey-patched in any way yet.
    class _Threadlocal(__import__(thread_mod_name)._local):

        def __init__(self):
            # Use a class with an initializer so that we can test
            # for 'is None' instead of catching AttributeError, making
            # the code cleaner and possibly solving some corner cases
            # (like #687)
            super(_Threadlocal, self).__init__()
            self.Hub = None
            self.loop = None
            self.hub = None

    _threadlocal = _Threadlocal()

    Hub = None # Set when gevent.hub is imported

    def get_hub_class():
        """Return the type of hub to use for the current thread.

        If there's no type of hub for the current thread yet, 'gevent.hub.Hub' is used.
        """
        hubtype = _threadlocal.Hub
        if hubtype is None:
            hubtype = _threadlocal.Hub = Hub
        return hubtype

    def set_default_hub_class(hubtype):
        global Hub
        Hub = hubtype

    def get_hub(*args, **kwargs): # pylint:disable=unused-argument
        """
        Return the hub for the current thread.

        If a hub does not exist in the current thread, a new one is
        created of the type returned by :func:`get_hub_class`.

        .. deprecated:: 1.3b1
           The ``*args`` and ``**kwargs`` arguments are deprecated. They were
           only used when the hub was created, and so were non-deterministic---to be
           sure they were used, *all* callers had to pass them, or they were order-dependent.
           Use ``set_hub`` instead.

        .. versionchanged:: 1.5a3
           The *args* and *kwargs* arguments are now completely ignored.
        """

        return get_hub_noargs()

    def get_hub_noargs():
        # Just like get_hub, but cheaper to call because it
        # takes no arguments or kwargs. See also a copy in
        # gevent/greenlet.py
        hub = _threadlocal.hub
        if hub is None:
            hubtype = get_hub_class()
            hub = _threadlocal.hub = hubtype()
        return hub

    def get_hub_if_exists():
        """Return the hub for the current thread.

        Return ``None`` if no hub has been created yet.
        """
        return _threadlocal.hub

    def set_hub(hub):
        _threadlocal.hub = hub

    def get_loop():
        return _threadlocal.loop

    def set_loop(loop):
        _threadlocal.loop = loop

    from gevent._util import import_c_accel
    import_c_accel(globals(), 'gevent.__hub_local')