# Copyright (c) 2010 Google Inc. All rights reserved.
#
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# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
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# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
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# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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import threading


class ThreadedMessageQueue(object):
    def __init__(self):
        self._messages = []
        self._is_running = True
        self._lock = threading.Lock()

    def post(self, message):
        with self._lock:
            self._messages.append(message)

    def stop(self):
        with self._lock:
            self._is_running = False

    def take_all(self):
        with self._lock:
            messages = self._messages
            is_running = self._is_running
            self._messages = []
        return (messages, is_running)