/*
* Copyright 2009 Funambol, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

/* $Id$ */

#pragma once

#include <executionqueue/ICommandsQueue.h>
#include <list>

#include <Event.h>
#include <CritSection.h>

#include <Logger/Logger.h>

namespace NS_DM_Client
{
    using NS_Common::EventEx;
    using NS_Common::CritSection;

    namespace NS_ExecutionQueue
    {
        class CommandInvokeThread;

        enum EnumResumeReason
        {
            e_NewCommand = NS_Common::EventEx::e_UserSignal,
            e_Stop = NS_Common::EventEx::e_Stop
        };

        class CommandsQueue :
            public ICommandsQueue
        {
        public:
            typedef std::list<ICommand*> Commands;

            friend class CommandInvokeThread;

            CommandsQueue(NS_Logging::Logger& log);
            virtual ~CommandsQueue(void);

            virtual bool Init();
            virtual bool Add(ICommand& cmd);
            virtual bool StopCommandExecution();

        protected:
            ICommand*   getCommand();
            ICommand*   popCommand();

            void discardWaitingCommands();

        private:
            Commands                m_Cmds;
            CritSection             m_CmdsLocker;
            EventEx                 m_resEvent;
            CommandInvokeThread*        m_CmdInvokeThread;
            NS_Logging::Logger&     m_logger;
        };

    }

}
