Code import

venv/lib/python2.7/site-packages/eventlet/hubs/__init__.py

@@ -0,0 +1,194 @@
+import os
+
+from eventlet import patcher
+from eventlet.support import greenlets as greenlet, six
+
+
+__all__ = ["use_hub", "get_hub", "get_default_hub", "trampoline"]
+
+threading = patcher.original('threading')
+_threadlocal = threading.local()
+
+
+def get_default_hub():
+    """Select the default hub implementation based on what multiplexing
+    libraries are installed.  The order that the hubs are tried is:
+
+    * epoll
+    * kqueue
+    * poll
+    * select
+
+    It won't automatically select the pyevent hub, because it's not
+    python-thread-safe.
+
+    .. include:: ../doc/common.txt
+    .. note :: |internal|
+    """
+
+    # pyevent hub disabled for now because it is not thread-safe
+    # try:
+    #    import eventlet.hubs.pyevent
+    #    return eventlet.hubs.pyevent
+    # except:
+    #    pass
+
+    select = patcher.original('select')
+    try:
+        import eventlet.hubs.epolls
+        return eventlet.hubs.epolls
+    except ImportError:
+        try:
+            import eventlet.hubs.kqueue
+            return eventlet.hubs.kqueue
+        except ImportError:
+            if hasattr(select, 'poll'):
+                import eventlet.hubs.poll
+                return eventlet.hubs.poll
+            else:
+                import eventlet.hubs.selects
+                return eventlet.hubs.selects
+
+
+def use_hub(mod=None):
+    """Use the module *mod*, containing a class called Hub, as the
+    event hub. Usually not required; the default hub is usually fine.
+
+    Mod can be an actual module, a string, or None.  If *mod* is a module,
+    it uses it directly.   If *mod* is a string and contains either '.' or ':'
+    use_hub tries to import the hub using the 'package.subpackage.module:Class'
+    convention, otherwise use_hub looks for a matching setuptools entry point
+    in the 'eventlet.hubs' group to load or finally tries to import
+    `eventlet.hubs.mod` and use that as the hub module.  If *mod* is None,
+    use_hub uses the default hub.  Only call use_hub during application
+    initialization,  because it resets the hub's state and any existing
+    timers or listeners will never be resumed.
+    """
+    if mod is None:
+        mod = os.environ.get('EVENTLET_HUB', None)
+    if mod is None:
+        mod = get_default_hub()
+    if hasattr(_threadlocal, 'hub'):
+        del _threadlocal.hub
+    if isinstance(mod, six.string_types):
+        assert mod.strip(), "Need to specify a hub"
+        if '.' in mod or ':' in mod:
+            modulename, _, classname = mod.strip().partition(':')
+            mod = __import__(modulename, globals(), locals(), [classname])
+            if classname:
+                mod = getattr(mod, classname)
+        else:
+            found = False
+
+            # setuptools 5.4.1 test_import_patched_defaults fail
+            # https://github.com/eventlet/eventlet/issues/177
+            try:
+                # try and import pkg_resources ...
+                import pkg_resources
+            except ImportError:
+                # ... but do not depend on it
+                pkg_resources = None
+            if pkg_resources is not None:
+                for entry in pkg_resources.iter_entry_points(
+                        group='eventlet.hubs', name=mod):
+                    mod, found = entry.load(), True
+                    break
+            if not found:
+                mod = __import__(
+                    'eventlet.hubs.' + mod, globals(), locals(), ['Hub'])
+    if hasattr(mod, 'Hub'):
+        _threadlocal.Hub = mod.Hub
+    else:
+        _threadlocal.Hub = mod
+
+
+def get_hub():
+    """Get the current event hub singleton object.
+
+    .. note :: |internal|
+    """
+    try:
+        hub = _threadlocal.hub
+    except AttributeError:
+        try:
+            _threadlocal.Hub
+        except AttributeError:
+            use_hub()
+        hub = _threadlocal.hub = _threadlocal.Hub()
+    return hub
+
+
+# Lame middle file import because complex dependencies in import graph
+from eventlet import timeout
+
+
+def trampoline(fd, read=None, write=None, timeout=None,
+               timeout_exc=timeout.Timeout,
+               mark_as_closed=None):
+    """Suspend the current coroutine until the given socket object or file
+    descriptor is ready to *read*, ready to *write*, or the specified
+    *timeout* elapses, depending on arguments specified.
+
+    To wait for *fd* to be ready to read, pass *read* ``=True``; ready to
+    write, pass *write* ``=True``. To specify a timeout, pass the *timeout*
+    argument in seconds.
+
+    If the specified *timeout* elapses before the socket is ready to read or
+    write, *timeout_exc* will be raised instead of ``trampoline()``
+    returning normally.
+
+    .. note :: |internal|
+    """
+    t = None
+    hub = get_hub()
+    current = greenlet.getcurrent()
+    assert hub.greenlet is not current, 'do not call blocking functions from the mainloop'
+    assert not (
+        read and write), 'not allowed to trampoline for reading and writing'
+    try:
+        fileno = fd.fileno()
+    except AttributeError:
+        fileno = fd
+    if timeout is not None:
+        def _timeout(exc):
+            # This is only useful to insert debugging
+            current.throw(exc)
+        t = hub.schedule_call_global(timeout, _timeout, timeout_exc)
+    try:
+        if read:
+            listener = hub.add(hub.READ, fileno, current.switch, current.throw, mark_as_closed)
+        elif write:
+            listener = hub.add(hub.WRITE, fileno, current.switch, current.throw, mark_as_closed)
+        try:
+            return hub.switch()
+        finally:
+            hub.remove(listener)
+    finally:
+        if t is not None:
+            t.cancel()
+
+
+def notify_close(fd):
+    """
+    A particular file descriptor has been explicitly closed. Register for any
+    waiting listeners to be notified on the next run loop.
+    """
+    hub = get_hub()
+    hub.notify_close(fd)
+
+
+def notify_opened(fd):
+    """
+    Some file descriptors may be closed 'silently' - that is, by the garbage
+    collector, by an external library, etc. When the OS returns a file descriptor
+    from an open call (or something similar), this may be the only indication we
+    have that the FD has been closed and then recycled.
+    We let the hub know that the old file descriptor is dead; any stuck listeners
+    will be disabled and notified in turn.
+    """
+    hub = get_hub()
+    hub.mark_as_reopened(fd)
+
+
+class IOClosed(IOError):
+    pass

venv/lib/python2.7/site-packages/eventlet/hubs/epolls.py

@@ -0,0 +1,61 @@
+import errno
+from eventlet.support import get_errno
+from eventlet import patcher
+select = patcher.original("select")
+if hasattr(select, 'epoll'):
+    epoll = select.epoll
+else:
+    try:
+        # http://pypi.python.org/pypi/select26/
+        from select26 import epoll
+    except ImportError:
+        try:
+            import epoll as _epoll_mod
+        except ImportError:
+            raise ImportError(
+                "No epoll implementation found in select module or PYTHONPATH")
+        else:
+            if hasattr(_epoll_mod, 'poll'):
+                epoll = _epoll_mod.poll
+            else:
+                raise ImportError(
+                    "You have an old, buggy epoll module in PYTHONPATH."
+                    " Install http://pypi.python.org/pypi/python-epoll/"
+                    " NOT http://pypi.python.org/pypi/pyepoll/. "
+                    " easy_install pyepoll installs the wrong version.")
+
+from eventlet.hubs.hub import BaseHub
+from eventlet.hubs import poll
+from eventlet.hubs.poll import READ, WRITE
+
+# NOTE: we rely on the fact that the epoll flag constants
+# are identical in value to the poll constants
+
+
+class Hub(poll.Hub):
+    def __init__(self, clock=None):
+        BaseHub.__init__(self, clock)
+        self.poll = epoll()
+        try:
+            # modify is required by select.epoll
+            self.modify = self.poll.modify
+        except AttributeError:
+            self.modify = self.poll.register
+
+    def add(self, evtype, fileno, cb, tb, mac):
+        oldlisteners = bool(self.listeners[READ].get(fileno) or
+                            self.listeners[WRITE].get(fileno))
+        listener = BaseHub.add(self, evtype, fileno, cb, tb, mac)
+        try:
+            if not oldlisteners:
+                # Means we've added a new listener
+                self.register(fileno, new=True)
+            else:
+                self.register(fileno, new=False)
+        except IOError as ex:    # ignore EEXIST, #80
+            if get_errno(ex) != errno.EEXIST:
+                raise
+        return listener
+
+    def do_poll(self, seconds):
+        return self.poll.poll(seconds)

venv/lib/python2.7/site-packages/eventlet/hubs/hub.py

@@ -0,0 +1,483 @@
+import errno
+import heapq
+import math
+import signal
+import sys
+import traceback
+
+arm_alarm = None
+if hasattr(signal, 'setitimer'):
+    def alarm_itimer(seconds):
+        signal.setitimer(signal.ITIMER_REAL, seconds)
+    arm_alarm = alarm_itimer
+else:
+    try:
+        import itimer
+        arm_alarm = itimer.alarm
+    except ImportError:
+        def alarm_signal(seconds):
+            signal.alarm(math.ceil(seconds))
+        arm_alarm = alarm_signal
+
+from eventlet.hubs import timer, IOClosed
+from eventlet.support import greenlets as greenlet, clear_sys_exc_info, monotonic, six
+
+g_prevent_multiple_readers = True
+
+READ = "read"
+WRITE = "write"
+
+
+def closed_callback(fileno):
+    """ Used to de-fang a callback that may be triggered by a loop in BaseHub.wait
+    """
+    # No-op.
+    pass
+
+
+class FdListener(object):
+
+    def __init__(self, evtype, fileno, cb, tb, mark_as_closed):
+        """ The following are required:
+        cb - the standard callback, which will switch into the
+            listening greenlet to indicate that the event waited upon
+            is ready
+        tb - a 'throwback'. This is typically greenlet.throw, used
+            to raise a signal into the target greenlet indicating that
+            an event was obsoleted by its underlying filehandle being
+            repurposed.
+        mark_as_closed - if any listener is obsoleted, this is called
+            (in the context of some other client greenlet) to alert
+            underlying filehandle-wrapping objects that they've been
+            closed.
+        """
+        assert (evtype is READ or evtype is WRITE)
+        self.evtype = evtype
+        self.fileno = fileno
+        self.cb = cb
+        self.tb = tb
+        self.mark_as_closed = mark_as_closed
+        self.spent = False
+        self.greenlet = greenlet.getcurrent()
+
+    def __repr__(self):
+        return "%s(%r, %r, %r, %r)" % (type(self).__name__, self.evtype, self.fileno,
+                                       self.cb, self.tb)
+    __str__ = __repr__
+
+    def defang(self):
+        self.cb = closed_callback
+        if self.mark_as_closed is not None:
+            self.mark_as_closed()
+        self.spent = True
+
+
+noop = FdListener(READ, 0, lambda x: None, lambda x: None, None)
+
+
+# in debug mode, track the call site that created the listener
+
+
+class DebugListener(FdListener):
+
+    def __init__(self, evtype, fileno, cb, tb, mark_as_closed):
+        self.where_called = traceback.format_stack()
+        self.greenlet = greenlet.getcurrent()
+        super(DebugListener, self).__init__(evtype, fileno, cb, tb, mark_as_closed)
+
+    def __repr__(self):
+        return "DebugListener(%r, %r, %r, %r, %r, %r)\n%sEndDebugFdListener" % (
+            self.evtype,
+            self.fileno,
+            self.cb,
+            self.tb,
+            self.mark_as_closed,
+            self.greenlet,
+            ''.join(self.where_called))
+    __str__ = __repr__
+
+
+def alarm_handler(signum, frame):
+    import inspect
+    raise RuntimeError("Blocking detector ALARMED at" + str(inspect.getframeinfo(frame)))
+
+
+class BaseHub(object):
+    """ Base hub class for easing the implementation of subclasses that are
+    specific to a particular underlying event architecture. """
+
+    SYSTEM_EXCEPTIONS = (KeyboardInterrupt, SystemExit)
+
+    READ = READ
+    WRITE = WRITE
+
+    def __init__(self, clock=None):
+        self.listeners = {READ: {}, WRITE: {}}
+        self.secondaries = {READ: {}, WRITE: {}}
+        self.closed = []
+
+        if clock is None:
+            clock = monotonic.monotonic
+        self.clock = clock
+
+        self.greenlet = greenlet.greenlet(self.run)
+        self.stopping = False
+        self.running = False
+        self.timers = []
+        self.next_timers = []
+        self.lclass = FdListener
+        self.timers_canceled = 0
+        self.debug_exceptions = True
+        self.debug_blocking = False
+        self.debug_blocking_resolution = 1
+
+    def block_detect_pre(self):
+        # shortest alarm we can possibly raise is one second
+        tmp = signal.signal(signal.SIGALRM, alarm_handler)
+        if tmp != alarm_handler:
+            self._old_signal_handler = tmp
+
+        arm_alarm(self.debug_blocking_resolution)
+
+    def block_detect_post(self):
+        if (hasattr(self, "_old_signal_handler") and
+                self._old_signal_handler):
+            signal.signal(signal.SIGALRM, self._old_signal_handler)
+        signal.alarm(0)
+
+    def add(self, evtype, fileno, cb, tb, mark_as_closed):
+        """ Signals an intent to or write a particular file descriptor.
+
+        The *evtype* argument is either the constant READ or WRITE.
+
+        The *fileno* argument is the file number of the file of interest.
+
+        The *cb* argument is the callback which will be called when the file
+        is ready for reading/writing.
+
+        The *tb* argument is the throwback used to signal (into the greenlet)
+        that the file was closed.
+
+        The *mark_as_closed* is used in the context of the event hub to
+        prepare a Python object as being closed, pre-empting further
+        close operations from accidentally shutting down the wrong OS thread.
+        """
+        listener = self.lclass(evtype, fileno, cb, tb, mark_as_closed)
+        bucket = self.listeners[evtype]
+        if fileno in bucket:
+            if g_prevent_multiple_readers:
+                raise RuntimeError(
+                    "Second simultaneous %s on fileno %s "
+                    "detected.  Unless you really know what you're doing, "
+                    "make sure that only one greenthread can %s any "
+                    "particular socket.  Consider using a pools.Pool. "
+                    "If you do know what you're doing and want to disable "
+                    "this error, call "
+                    "eventlet.debug.hub_prevent_multiple_readers(False) - MY THREAD=%s; "
+                    "THAT THREAD=%s" % (
+                        evtype, fileno, evtype, cb, bucket[fileno]))
+            # store off the second listener in another structure
+            self.secondaries[evtype].setdefault(fileno, []).append(listener)
+        else:
+            bucket[fileno] = listener
+        return listener
+
+    def _obsolete(self, fileno):
+        """ We've received an indication that 'fileno' has been obsoleted.
+            Any current listeners must be defanged, and notifications to
+            their greenlets queued up to send.
+        """
+        found = False
+        for evtype, bucket in six.iteritems(self.secondaries):
+            if fileno in bucket:
+                for listener in bucket[fileno]:
+                    found = True
+                    self.closed.append(listener)
+                    listener.defang()
+                del bucket[fileno]
+
+        # For the primary listeners, we actually need to call remove,
+        # which may modify the underlying OS polling objects.
+        for evtype, bucket in six.iteritems(self.listeners):
+            if fileno in bucket:
+                listener = bucket[fileno]
+                found = True
+                self.closed.append(listener)
+                self.remove(listener)
+                listener.defang()
+
+        return found
+
+    def notify_close(self, fileno):
+        """ We might want to do something when a fileno is closed.
+            However, currently it suffices to obsolete listeners only
+            when we detect an old fileno being recycled, on open.
+        """
+        pass
+
+    def remove(self, listener):
+        if listener.spent:
+            # trampoline may trigger this in its finally section.
+            return
+
+        fileno = listener.fileno
+        evtype = listener.evtype
+        self.listeners[evtype].pop(fileno, None)
+        # migrate a secondary listener to be the primary listener
+        if fileno in self.secondaries[evtype]:
+            sec = self.secondaries[evtype].get(fileno, None)
+            if not sec:
+                return
+            self.listeners[evtype][fileno] = sec.pop(0)
+            if not sec:
+                del self.secondaries[evtype][fileno]
+
+    def mark_as_reopened(self, fileno):
+        """ If a file descriptor is returned by the OS as the result of some
+            open call (or equivalent), that signals that it might be being
+            recycled.
+
+            Catch the case where the fd was previously in use.
+        """
+        self._obsolete(fileno)
+
+    def remove_descriptor(self, fileno):
+        """ Completely remove all listeners for this fileno.  For internal use
+        only."""
+        listeners = []
+        listeners.append(self.listeners[READ].pop(fileno, noop))
+        listeners.append(self.listeners[WRITE].pop(fileno, noop))
+        listeners.extend(self.secondaries[READ].pop(fileno, ()))
+        listeners.extend(self.secondaries[WRITE].pop(fileno, ()))
+        for listener in listeners:
+            try:
+                listener.cb(fileno)
+            except Exception:
+                self.squelch_generic_exception(sys.exc_info())
+
+    def close_one(self):
+        """ Triggered from the main run loop. If a listener's underlying FD was
+            closed somehow, throw an exception back to the trampoline, which should
+            be able to manage it appropriately.
+        """
+        listener = self.closed.pop()
+        if not listener.greenlet.dead:
+            # There's no point signalling a greenlet that's already dead.
+            listener.tb(IOClosed(errno.ENOTCONN, "Operation on closed file"))
+
+    def ensure_greenlet(self):
+        if self.greenlet.dead:
+            # create new greenlet sharing same parent as original
+            new = greenlet.greenlet(self.run, self.greenlet.parent)
+            # need to assign as parent of old greenlet
+            # for those greenlets that are currently
+            # children of the dead hub and may subsequently
+            # exit without further switching to hub.
+            self.greenlet.parent = new
+            self.greenlet = new
+
+    def switch(self):
+        cur = greenlet.getcurrent()
+        assert cur is not self.greenlet, 'Cannot switch to MAINLOOP from MAINLOOP'
+        switch_out = getattr(cur, 'switch_out', None)
+        if switch_out is not None:
+            try:
+                switch_out()
+            except:
+                self.squelch_generic_exception(sys.exc_info())
+        self.ensure_greenlet()
+        try:
+            if self.greenlet.parent is not cur:
+                cur.parent = self.greenlet
+        except ValueError:
+            pass  # gets raised if there is a greenlet parent cycle
+        clear_sys_exc_info()
+        return self.greenlet.switch()
+
+    def squelch_exception(self, fileno, exc_info):
+        traceback.print_exception(*exc_info)
+        sys.stderr.write("Removing descriptor: %r\n" % (fileno,))
+        sys.stderr.flush()
+        try:
+            self.remove_descriptor(fileno)
+        except Exception as e:
+            sys.stderr.write("Exception while removing descriptor! %r\n" % (e,))
+            sys.stderr.flush()
+
+    def wait(self, seconds=None):
+        raise NotImplementedError("Implement this in a subclass")
+
+    def default_sleep(self):
+        return 60.0
+
+    def sleep_until(self):
+        t = self.timers
+        if not t:
+            return None
+        return t[0][0]
+
+    def run(self, *a, **kw):
+        """Run the runloop until abort is called.
+        """
+        # accept and discard variable arguments because they will be
+        # supplied if other greenlets have run and exited before the
+        # hub's greenlet gets a chance to run
+        if self.running:
+            raise RuntimeError("Already running!")
+        try:
+            self.running = True
+            self.stopping = False
+            while not self.stopping:
+                while self.closed:
+                    # We ditch all of these first.
+                    self.close_one()
+                self.prepare_timers()
+                if self.debug_blocking:
+                    self.block_detect_pre()
+                self.fire_timers(self.clock())
+                if self.debug_blocking:
+                    self.block_detect_post()
+                self.prepare_timers()
+                wakeup_when = self.sleep_until()
+                if wakeup_when is None:
+                    sleep_time = self.default_sleep()
+                else:
+                    sleep_time = wakeup_when - self.clock()
+                if sleep_time > 0:
+                    self.wait(sleep_time)
+                else:
+                    self.wait(0)
+            else:
+                self.timers_canceled = 0
+                del self.timers[:]
+                del self.next_timers[:]
+        finally:
+            self.running = False
+            self.stopping = False
+
+    def abort(self, wait=False):
+        """Stop the runloop. If run is executing, it will exit after
+        completing the next runloop iteration.
+
+        Set *wait* to True to cause abort to switch to the hub immediately and
+        wait until it's finished processing.  Waiting for the hub will only
+        work from the main greenthread; all other greenthreads will become
+        unreachable.
+        """
+        if self.running:
+            self.stopping = True
+        if wait:
+            assert self.greenlet is not greenlet.getcurrent(
+            ), "Can't abort with wait from inside the hub's greenlet."
+            # schedule an immediate timer just so the hub doesn't sleep
+            self.schedule_call_global(0, lambda: None)
+            # switch to it; when done the hub will switch back to its parent,
+            # the main greenlet
+            self.switch()
+
+    def squelch_generic_exception(self, exc_info):
+        if self.debug_exceptions:
+            traceback.print_exception(*exc_info)
+            sys.stderr.flush()
+            clear_sys_exc_info()
+
+    def squelch_timer_exception(self, timer, exc_info):
+        if self.debug_exceptions:
+            traceback.print_exception(*exc_info)
+            sys.stderr.flush()
+            clear_sys_exc_info()
+
+    def add_timer(self, timer):
+        scheduled_time = self.clock() + timer.seconds
+        self.next_timers.append((scheduled_time, timer))
+        return scheduled_time
+
+    def timer_canceled(self, timer):
+        self.timers_canceled += 1
+        len_timers = len(self.timers) + len(self.next_timers)
+        if len_timers > 1000 and len_timers / 2 <= self.timers_canceled:
+            self.timers_canceled = 0
+            self.timers = [t for t in self.timers if not t[1].called]
+            self.next_timers = [t for t in self.next_timers if not t[1].called]
+            heapq.heapify(self.timers)
+
+    def prepare_timers(self):
+        heappush = heapq.heappush
+        t = self.timers
+        for item in self.next_timers:
+            if item[1].called:
+                self.timers_canceled -= 1
+            else:
+                heappush(t, item)
+        del self.next_timers[:]
+
+    def schedule_call_local(self, seconds, cb, *args, **kw):
+        """Schedule a callable to be called after 'seconds' seconds have
+        elapsed. Cancel the timer if greenlet has exited.
+            seconds: The number of seconds to wait.
+            cb: The callable to call after the given time.
+            *args: Arguments to pass to the callable when called.
+            **kw: Keyword arguments to pass to the callable when called.
+        """
+        t = timer.LocalTimer(seconds, cb, *args, **kw)
+        self.add_timer(t)
+        return t
+
+    def schedule_call_global(self, seconds, cb, *args, **kw):
+        """Schedule a callable to be called after 'seconds' seconds have
+        elapsed. The timer will NOT be canceled if the current greenlet has
+        exited before the timer fires.
+            seconds: The number of seconds to wait.
+            cb: The callable to call after the given time.
+            *args: Arguments to pass to the callable when called.
+            **kw: Keyword arguments to pass to the callable when called.
+        """
+        t = timer.Timer(seconds, cb, *args, **kw)
+        self.add_timer(t)
+        return t
+
+    def fire_timers(self, when):
+        t = self.timers
+        heappop = heapq.heappop
+
+        while t:
+            next = t[0]
+
+            exp = next[0]
+            timer = next[1]
+
+            if when < exp:
+                break
+
+            heappop(t)
+
+            try:
+                if timer.called:
+                    self.timers_canceled -= 1
+                else:
+                    timer()
+            except self.SYSTEM_EXCEPTIONS:
+                raise
+            except:
+                self.squelch_timer_exception(timer, sys.exc_info())
+                clear_sys_exc_info()
+
+    # for debugging:
+
+    def get_readers(self):
+        return self.listeners[READ].values()
+
+    def get_writers(self):
+        return self.listeners[WRITE].values()
+
+    def get_timers_count(hub):
+        return len(hub.timers) + len(hub.next_timers)
+
+    def set_debug_listeners(self, value):
+        if value:
+            self.lclass = DebugListener
+        else:
+            self.lclass = FdListener
+
+    def set_timer_exceptions(self, value):
+        self.debug_exceptions = value

venv/lib/python2.7/site-packages/eventlet/hubs/kqueue.py

@@ -0,0 +1,114 @@
+import os
+import sys
+from eventlet import patcher, support
+from eventlet.support import six
+select = patcher.original('select')
+time = patcher.original('time')
+
+from eventlet.hubs.hub import BaseHub, READ, WRITE, noop
+
+
+if getattr(select, 'kqueue', None) is None:
+    raise ImportError('No kqueue implementation found in select module')
+
+
+FILTERS = {READ: select.KQ_FILTER_READ,
+           WRITE: select.KQ_FILTER_WRITE}
+
+
+class Hub(BaseHub):
+    MAX_EVENTS = 100
+
+    def __init__(self, clock=None):
+        super(Hub, self).__init__(clock)
+        self._events = {}
+        self._init_kqueue()
+
+    def _init_kqueue(self):
+        self.kqueue = select.kqueue()
+        self._pid = os.getpid()
+
+    def _reinit_kqueue(self):
+        self.kqueue.close()
+        self._init_kqueue()
+        kqueue = self.kqueue
+        events = [e for i in six.itervalues(self._events)
+                  for e in six.itervalues(i)]
+        kqueue.control(events, 0, 0)
+
+    def _control(self, events, max_events, timeout):
+        try:
+            return self.kqueue.control(events, max_events, timeout)
+        except (OSError, IOError):
+            # have we forked?
+            if os.getpid() != self._pid:
+                self._reinit_kqueue()
+                return self.kqueue.control(events, max_events, timeout)
+            raise
+
+    def add(self, evtype, fileno, cb, tb, mac):
+        listener = super(Hub, self).add(evtype, fileno, cb, tb, mac)
+        events = self._events.setdefault(fileno, {})
+        if evtype not in events:
+            try:
+                event = select.kevent(fileno, FILTERS.get(evtype), select.KQ_EV_ADD)
+                self._control([event], 0, 0)
+                events[evtype] = event
+            except ValueError:
+                super(Hub, self).remove(listener)
+                raise
+        return listener
+
+    def _delete_events(self, events):
+        del_events = [
+            select.kevent(e.ident, e.filter, select.KQ_EV_DELETE)
+            for e in events
+        ]
+        self._control(del_events, 0, 0)
+
+    def remove(self, listener):
+        super(Hub, self).remove(listener)
+        evtype = listener.evtype
+        fileno = listener.fileno
+        if not self.listeners[evtype].get(fileno):
+            event = self._events[fileno].pop(evtype, None)
+            if event is None:
+                return
+            try:
+                self._delete_events((event,))
+            except OSError:
+                pass
+
+    def remove_descriptor(self, fileno):
+        super(Hub, self).remove_descriptor(fileno)
+        try:
+            events = self._events.pop(fileno).values()
+            self._delete_events(events)
+        except KeyError:
+            pass
+        except OSError:
+            pass
+
+    def wait(self, seconds=None):
+        readers = self.listeners[READ]
+        writers = self.listeners[WRITE]
+
+        if not readers and not writers:
+            if seconds:
+                time.sleep(seconds)
+            return
+        result = self._control([], self.MAX_EVENTS, seconds)
+        SYSTEM_EXCEPTIONS = self.SYSTEM_EXCEPTIONS
+        for event in result:
+            fileno = event.ident
+            evfilt = event.filter
+            try:
+                if evfilt == FILTERS[READ]:
+                    readers.get(fileno, noop).cb(fileno)
+                if evfilt == FILTERS[WRITE]:
+                    writers.get(fileno, noop).cb(fileno)
+            except SYSTEM_EXCEPTIONS:
+                raise
+            except:
+                self.squelch_exception(fileno, sys.exc_info())
+                support.clear_sys_exc_info()

venv/lib/python2.7/site-packages/eventlet/hubs/poll.py

@@ -0,0 +1,122 @@
+import errno
+import sys
+
+from eventlet import patcher
+select = patcher.original('select')
+time = patcher.original('time')
+
+from eventlet.hubs.hub import BaseHub, READ, WRITE, noop
+from eventlet.support import get_errno, clear_sys_exc_info
+
+EXC_MASK = select.POLLERR | select.POLLHUP
+READ_MASK = select.POLLIN | select.POLLPRI
+WRITE_MASK = select.POLLOUT
+
+
+class Hub(BaseHub):
+    def __init__(self, clock=None):
+        super(Hub, self).__init__(clock)
+        self.poll = select.poll()
+        # poll.modify is new to 2.6
+        try:
+            self.modify = self.poll.modify
+        except AttributeError:
+            self.modify = self.poll.register
+
+    def add(self, evtype, fileno, cb, tb, mac):
+        listener = super(Hub, self).add(evtype, fileno, cb, tb, mac)
+        self.register(fileno, new=True)
+        return listener
+
+    def remove(self, listener):
+        super(Hub, self).remove(listener)
+        self.register(listener.fileno)
+
+    def register(self, fileno, new=False):
+        mask = 0
+        if self.listeners[READ].get(fileno):
+            mask |= READ_MASK | EXC_MASK
+        if self.listeners[WRITE].get(fileno):
+            mask |= WRITE_MASK | EXC_MASK
+        try:
+            if mask:
+                if new:
+                    self.poll.register(fileno, mask)
+                else:
+                    try:
+                        self.modify(fileno, mask)
+                    except (IOError, OSError):
+                        self.poll.register(fileno, mask)
+            else:
+                try:
+                    self.poll.unregister(fileno)
+                except (KeyError, IOError, OSError):
+                    # raised if we try to remove a fileno that was
+                    # already removed/invalid
+                    pass
+        except ValueError:
+            # fileno is bad, issue 74
+            self.remove_descriptor(fileno)
+            raise
+
+    def remove_descriptor(self, fileno):
+        super(Hub, self).remove_descriptor(fileno)
+        try:
+            self.poll.unregister(fileno)
+        except (KeyError, ValueError, IOError, OSError):
+            # raised if we try to remove a fileno that was
+            # already removed/invalid
+            pass
+
+    def do_poll(self, seconds):
+        # poll.poll expects integral milliseconds
+        return self.poll.poll(int(seconds * 1000.0))
+
+    def wait(self, seconds=None):
+        readers = self.listeners[READ]
+        writers = self.listeners[WRITE]
+
+        if not readers and not writers:
+            if seconds:
+                time.sleep(seconds)
+            return
+        try:
+            presult = self.do_poll(seconds)
+        except (IOError, select.error) as e:
+            if get_errno(e) == errno.EINTR:
+                return
+            raise
+        SYSTEM_EXCEPTIONS = self.SYSTEM_EXCEPTIONS
+
+        if self.debug_blocking:
+            self.block_detect_pre()
+
+        # Accumulate the listeners to call back to prior to
+        # triggering any of them. This is to keep the set
+        # of callbacks in sync with the events we've just
+        # polled for. It prevents one handler from invalidating
+        # another.
+        callbacks = set()
+        for fileno, event in presult:
+            if event & READ_MASK:
+                callbacks.add((readers.get(fileno, noop), fileno))
+            if event & WRITE_MASK:
+                callbacks.add((writers.get(fileno, noop), fileno))
+            if event & select.POLLNVAL:
+                self.remove_descriptor(fileno)
+                continue
+            if event & EXC_MASK:
+                callbacks.add((readers.get(fileno, noop), fileno))
+                callbacks.add((writers.get(fileno, noop), fileno))
+
+        for listener, fileno in callbacks:
+            try:
+                listener.cb(fileno)
+            except SYSTEM_EXCEPTIONS:
+                raise
+            except:
+                self.squelch_exception(fileno, sys.exc_info())
+                clear_sys_exc_info()
+
+        if self.debug_blocking:
+            self.block_detect_post()

venv/lib/python2.7/site-packages/eventlet/hubs/pyevent.py

@@ -0,0 +1,178 @@
+import sys
+import traceback
+import event
+import types
+
+from eventlet.support import greenlets as greenlet, six
+from eventlet.hubs.hub import BaseHub, READ, WRITE
+
+
+class event_wrapper(object):
+
+    def __init__(self, impl=None, seconds=None):
+        self.impl = impl
+        self.seconds = seconds
+
+    def __repr__(self):
+        if self.impl is not None:
+            return repr(self.impl)
+        else:
+            return object.__repr__(self)
+
+    def __str__(self):
+        if self.impl is not None:
+            return str(self.impl)
+        else:
+            return object.__str__(self)
+
+    def cancel(self):
+        if self.impl is not None:
+            self.impl.delete()
+            self.impl = None
+
+    @property
+    def pending(self):
+        return bool(self.impl and self.impl.pending())
+
+
+class Hub(BaseHub):
+
+    SYSTEM_EXCEPTIONS = (KeyboardInterrupt, SystemExit)
+
+    def __init__(self):
+        super(Hub, self).__init__()
+        event.init()
+
+        self.signal_exc_info = None
+        self.signal(
+            2,
+            lambda signalnum, frame: self.greenlet.parent.throw(KeyboardInterrupt))
+        self.events_to_add = []
+
+    def dispatch(self):
+        loop = event.loop
+        while True:
+            for e in self.events_to_add:
+                if e is not None and e.impl is not None and e.seconds is not None:
+                    e.impl.add(e.seconds)
+                    e.seconds = None
+            self.events_to_add = []
+            result = loop()
+
+            if getattr(event, '__event_exc', None) is not None:
+                # only have to do this because of bug in event.loop
+                t = getattr(event, '__event_exc')
+                setattr(event, '__event_exc', None)
+                assert getattr(event, '__event_exc') is None
+                six.reraise(t[0], t[1], t[2])
+
+            if result != 0:
+                return result
+
+    def run(self):
+        while True:
+            try:
+                self.dispatch()
+            except greenlet.GreenletExit:
+                break
+            except self.SYSTEM_EXCEPTIONS:
+                raise
+            except:
+                if self.signal_exc_info is not None:
+                    self.schedule_call_global(
+                        0, greenlet.getcurrent().parent.throw, *self.signal_exc_info)
+                    self.signal_exc_info = None
+                else:
+                    self.squelch_timer_exception(None, sys.exc_info())
+
+    def abort(self, wait=True):
+        self.schedule_call_global(0, self.greenlet.throw, greenlet.GreenletExit)
+        if wait:
+            assert self.greenlet is not greenlet.getcurrent(
+            ), "Can't abort with wait from inside the hub's greenlet."
+            self.switch()
+
+    def _getrunning(self):
+        return bool(self.greenlet)
+
+    def _setrunning(self, value):
+        pass  # exists for compatibility with BaseHub
+    running = property(_getrunning, _setrunning)
+
+    def add(self, evtype, fileno, real_cb, real_tb, mac):
+        # this is stupid: pyevent won't call a callback unless it's a function,
+        # so we have to force it to be one here
+        if isinstance(real_cb, types.BuiltinMethodType):
+            def cb(_d):
+                real_cb(_d)
+        else:
+            cb = real_cb
+
+        if evtype is READ:
+            evt = event.read(fileno, cb, fileno)
+        elif evtype is WRITE:
+            evt = event.write(fileno, cb, fileno)
+
+        return super(Hub, self).add(evtype, fileno, evt, real_tb, mac)
+
+    def signal(self, signalnum, handler):
+        def wrapper():
+            try:
+                handler(signalnum, None)
+            except:
+                self.signal_exc_info = sys.exc_info()
+                event.abort()
+        return event_wrapper(event.signal(signalnum, wrapper))
+
+    def remove(self, listener):
+        super(Hub, self).remove(listener)
+        listener.cb.delete()
+
+    def remove_descriptor(self, fileno):
+        for lcontainer in six.itervalues(self.listeners):
+            listener = lcontainer.pop(fileno, None)
+            if listener:
+                try:
+                    listener.cb.delete()
+                except self.SYSTEM_EXCEPTIONS:
+                    raise
+                except:
+                    traceback.print_exc()
+
+    def schedule_call_local(self, seconds, cb, *args, **kwargs):
+        current = greenlet.getcurrent()
+        if current is self.greenlet:
+            return self.schedule_call_global(seconds, cb, *args, **kwargs)
+        event_impl = event.event(_scheduled_call_local, (cb, args, kwargs, current))
+        wrapper = event_wrapper(event_impl, seconds=seconds)
+        self.events_to_add.append(wrapper)
+        return wrapper
+
+    schedule_call = schedule_call_local
+
+    def schedule_call_global(self, seconds, cb, *args, **kwargs):
+        event_impl = event.event(_scheduled_call, (cb, args, kwargs))
+        wrapper = event_wrapper(event_impl, seconds=seconds)
+        self.events_to_add.append(wrapper)
+        return wrapper
+
+    def _version_info(self):
+        baseversion = event.__version__
+        return baseversion
+
+
+def _scheduled_call(event_impl, handle, evtype, arg):
+    cb, args, kwargs = arg
+    try:
+        cb(*args, **kwargs)
+    finally:
+        event_impl.delete()
+
+
+def _scheduled_call_local(event_impl, handle, evtype, arg):
+    cb, args, kwargs, caller_greenlet = arg
+    try:
+        if not caller_greenlet.dead:
+            cb(*args, **kwargs)
+    finally:
+        event_impl.delete()

venv/lib/python2.7/site-packages/eventlet/hubs/selects.py

@@ -0,0 +1,60 @@
+import errno
+import sys
+from eventlet import patcher
+from eventlet.support import get_errno, clear_sys_exc_info
+select = patcher.original('select')
+time = patcher.original('time')
+
+from eventlet.hubs.hub import BaseHub, READ, WRITE, noop
+
+try:
+    BAD_SOCK = set((errno.EBADF, errno.WSAENOTSOCK))
+except AttributeError:
+    BAD_SOCK = set((errno.EBADF,))
+
+
+class Hub(BaseHub):
+    def _remove_bad_fds(self):
+        """ Iterate through fds, removing the ones that are bad per the
+        operating system.
+        """
+        all_fds = list(self.listeners[READ]) + list(self.listeners[WRITE])
+        for fd in all_fds:
+            try:
+                select.select([fd], [], [], 0)
+            except select.error as e:
+                if get_errno(e) in BAD_SOCK:
+                    self.remove_descriptor(fd)
+
+    def wait(self, seconds=None):
+        readers = self.listeners[READ]
+        writers = self.listeners[WRITE]
+        if not readers and not writers:
+            if seconds:
+                time.sleep(seconds)
+            return
+        all_fds = list(readers) + list(writers)
+        try:
+            r, w, er = select.select(readers.keys(), writers.keys(), all_fds, seconds)
+        except select.error as e:
+            if get_errno(e) == errno.EINTR:
+                return
+            elif get_errno(e) in BAD_SOCK:
+                self._remove_bad_fds()
+                return
+            else:
+                raise
+
+        for fileno in er:
+            readers.get(fileno, noop).cb(fileno)
+            writers.get(fileno, noop).cb(fileno)
+
+        for listeners, events in ((readers, r), (writers, w)):
+            for fileno in events:
+                try:
+                    listeners.get(fileno, noop).cb(fileno)
+                except self.SYSTEM_EXCEPTIONS:
+                    raise
+                except:
+                    self.squelch_exception(fileno, sys.exc_info())
+                    clear_sys_exc_info()

venv/lib/python2.7/site-packages/eventlet/hubs/timer.py

@@ -0,0 +1,105 @@
+import traceback
+
+from eventlet.support import greenlets as greenlet, six
+from eventlet.hubs import get_hub
+
+""" If true, captures a stack trace for each timer when constructed.  This is
+useful for debugging leaking timers, to find out where the timer was set up. """
+_g_debug = False
+
+
+class Timer(object):
+    def __init__(self, seconds, cb, *args, **kw):
+        """Create a timer.
+            seconds: The minimum number of seconds to wait before calling
+            cb: The callback to call when the timer has expired
+            *args: The arguments to pass to cb
+            **kw: The keyword arguments to pass to cb
+
+        This timer will not be run unless it is scheduled in a runloop by
+        calling timer.schedule() or runloop.add_timer(timer).
+        """
+        self.seconds = seconds
+        self.tpl = cb, args, kw
+        self.called = False
+        if _g_debug:
+            self.traceback = six.StringIO()
+            traceback.print_stack(file=self.traceback)
+
+    @property
+    def pending(self):
+        return not self.called
+
+    def __repr__(self):
+        secs = getattr(self, 'seconds', None)
+        cb, args, kw = getattr(self, 'tpl', (None, None, None))
+        retval = "Timer(%s, %s, *%s, **%s)" % (
+            secs, cb, args, kw)
+        if _g_debug and hasattr(self, 'traceback'):
+            retval += '\n' + self.traceback.getvalue()
+        return retval
+
+    def copy(self):
+        cb, args, kw = self.tpl
+        return self.__class__(self.seconds, cb, *args, **kw)
+
+    def schedule(self):
+        """Schedule this timer to run in the current runloop.
+        """
+        self.called = False
+        self.scheduled_time = get_hub().add_timer(self)
+        return self
+
+    def __call__(self, *args):
+        if not self.called:
+            self.called = True
+            cb, args, kw = self.tpl
+            try:
+                cb(*args, **kw)
+            finally:
+                try:
+                    del self.tpl
+                except AttributeError:
+                    pass
+
+    def cancel(self):
+        """Prevent this timer from being called. If the timer has already
+        been called or canceled, has no effect.
+        """
+        if not self.called:
+            self.called = True
+            get_hub().timer_canceled(self)
+            try:
+                del self.tpl
+            except AttributeError:
+                pass
+
+    # No default ordering in 3.x. heapq uses <
+    # FIXME should full set be added?
+    def __lt__(self, other):
+        return id(self) < id(other)
+
+
+class LocalTimer(Timer):
+
+    def __init__(self, *args, **kwargs):
+        self.greenlet = greenlet.getcurrent()
+        Timer.__init__(self, *args, **kwargs)
+
+    @property
+    def pending(self):
+        if self.greenlet is None or self.greenlet.dead:
+            return False
+        return not self.called
+
+    def __call__(self, *args):
+        if not self.called:
+            self.called = True
+            if self.greenlet is not None and self.greenlet.dead:
+                return
+            cb, args, kw = self.tpl
+            cb(*args, **kw)
+
+    def cancel(self):
+        self.greenlet = None
+        Timer.cancel(self)