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Click on a line that starts with a "+" to see the C code that Cython generated for it.
Raw output: _abstract_linkable.c
+001: # -*- coding: utf-8 -*-
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002: # cython: auto_pickle=False,embedsignature=True,always_allow_keywords=False
003: """
004: Internal module, support for the linkable protocol for "event" like objects.
005:
006: """
007: from __future__ import absolute_import
008: from __future__ import division
009: from __future__ import print_function
010:
+011: import sys
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012:
+013: from gevent._hub_local import get_hub_noargs as get_hub
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014:
+015: from gevent.exceptions import InvalidSwitchError
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+016: from gevent.timeout import Timeout
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017:
+018: locals()['getcurrent'] = __import__('greenlet').getcurrent
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+019: locals()['greenlet_init'] = lambda: None
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022: 'AbstractLinkable',
023: ]
024:
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026: # Encapsulates the standard parts of the linking and notifying
027: # protocol common to both repeatable events (Event, Semaphore) and
028: # one-time events (AsyncResult).
029: #
030: # TODO: As of gevent 1.5, we use the same datastructures and almost
031: # the same algorithm as Greenlet. See about unifying them more.
032:
033: __slots__ = (
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035: '_links',
036: '_notifier',
037: '_notify_all',
038: '__weakref__'
039: )
040:
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042: # Before this implementation, AsyncResult and Semaphore
043: # maintained the order of notifications, but Event did not.
044:
045: # In gevent 1.3, before Semaphore extended this class, that
046: # was changed to not maintain the order. It was done because
047: # Event guaranteed to only call callbacks once (a set) but
048: # AsyncResult had no such guarantees. When Semaphore was
049: # changed to extend this class, it lost its ordering
050: # guarantees. Unfortunately, that made it unfair. There are
051: # rare cases that this can starve a greenlet
052: # (https://github.com/gevent/gevent/issues/1487) and maybe
053: # even lead to deadlock (not tested).
054:
055: # So in gevent 1.5 we go back to maintaining order. But it's
056: # still important not to make duplicate calls, and it's also
057: # important to avoid O(n^2) behaviour that can result from
058: # naive use of a simple list due to the need to handle removed
059: # links in the _notify_links loop. Cython has special support for
060: # built-in sets, lists, and dicts, but not ordereddict. Rather than
061: # use two data structures, or a dict({link: order}), we simply use a
062: # list and remove objects as we go, keeping track of them so as not to
063: # have duplicates called. This makes `unlink` O(n), but we can avoid
064: # calling it in the common case in _wait_core (even so, the number of
065: # waiters should usually be pretty small)
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070: # If its false, we only call callbacks as long as ready() returns true.
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if (__pyx_t_1) {
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211:
212:
+213: from gevent._util import import_c_accel
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+214: import_c_accel(globals(), 'gevent.__abstract_linkable')
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