Пример #1
0
        def acquire(self, blocking=1):
            tid = thread_get_ident()
            gid = greenlet_get_ident()
            tid_gid = (tid, gid)
            if tid_gid == self._owner:  # We trust the GIL here so we can do this comparison w/o locking.
                self._count = self._count + 1
                return True

            greenlet_lock = self._get_greenlet_lock()

            self._wait_queue.append(gid)
            # this is a safety in case an exception is raised somewhere and we must make sure we're not in the queue
            # otherwise it'll get stuck forever.
            remove_from_queue_on_return = True
            try:
                while True:
                    if not greenlet_lock.acquire(blocking):
                        return False  # non-blocking and failed to acquire lock

                    if self._wait_queue[0] == gid:
                        # Hurray, we can have the lock.
                        self._owner = tid_gid
                        self._count = 1
                        remove_from_queue_on_return = False  # don't remove us from the queue
                        return True
                    else:
                        # we already hold the greenlet lock so obviously the owner is not in our thread.
                        greenlet_lock.release()
                        if blocking:
                            gevent.sleep(0.0005)  # 500 us -> initial delay of 1 ms
                        else:
                            return False
            finally:
                if remove_from_queue_on_return:
                    self._wait_queue.remove(gid)
Пример #2
0
        def acquire(self, blocking=1):
            tid = thread_get_ident()
            gid = greenlet_get_ident()
            tid_gid = (tid, gid)
            if tid_gid == self._owner:  # We trust the GIL here so we can do this comparison w/o locking.
                self._count = self._count + 1
                return True

            greenlet_lock = self._get_greenlet_lock()

            self._wait_queue.append(gid)
            # this is a safety in case an exception is raised somewhere and we must make sure we're not in the queue
            # otherwise it'll get stuck forever.
            remove_from_queue_on_return = True
            try:
                while True:
                    if not greenlet_lock.acquire(blocking):
                        return False  # non-blocking and failed to acquire lock

                    if self._wait_queue[0] == gid:
                        # Hurray, we can have the lock.
                        self._owner = tid_gid
                        self._count = 1
                        remove_from_queue_on_return = False  # don't remove us from the queue
                        return True
                    else:
                        # we already hold the greenlet lock so obviously the owner is not in our thread.
                        greenlet_lock.release()
                        if blocking:
                            gevent.sleep(0.0005)  # 500 us -> initial delay of 1 ms
                        else:
                            return False
            finally:
                if remove_from_queue_on_return:
                    self._wait_queue.remove(gid)
Пример #3
0
        def release(self):
            tid_gid = (thread_get_ident(), greenlet_get_ident())
            if tid_gid != self._owner:
                raise RuntimeError("cannot release un-acquired lock")

            self._count -= 1
            if not self._count:
                self._owner = None
                gid = self._wait_queue.pop(0)
                assert gid == tid_gid[1]
                self._thread_local.greenlet_lock.release()
Пример #4
0
        def release(self):
            tid_gid = (thread_get_ident(), greenlet_get_ident())
            if tid_gid != self._owner:
                raise RuntimeError("cannot release un-acquired lock")

            self._count -= 1
            if not self._count:
                self._owner = None
                gid = self._wait_queue.pop(0)
                assert gid == tid_gid[1]
                self._thread_local.greenlet_lock.release()
Пример #5
0
 def _is_owned(self):
     return self._owner == (thread_get_ident(), greenlet_get_ident())
Пример #6
0
 def _is_owned(self):
     return self._owner == (thread_get_ident(), greenlet_get_ident())