Timer.h

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/*
 * Timer.h
 *
 * Copyright (C) 2011 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *
 * 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.
 *
 */

#ifndef IBRCOMMON_TIMER_H_
#define IBRCOMMON_TIMER_H_

#include "ibrcommon/thread/Thread.h"
#include "ibrcommon/thread/Conditional.h"
#include <map>
#include <set>

#include <string>
#include <iostream>

namespace ibrcommon
{
        class Timer;
        class TimerCallback
        {
        public:
                virtual ~TimerCallback() {
                }

                virtual size_t timeout(Timer *timer) = 0;
        };

        class Timer : public JoinableThread
        {
        public:
                typedef size_t time_t;
                static time_t get_current_time();

                Timer(TimerCallback &callback, size_t timeout = 0);

                virtual ~Timer();

                void set(size_t timeout);

                void reset();

                void pause();

                size_t getTimeout() const;

        protected:
                void run() throw ();
                void __cancellation() throw ();

        private:
                enum TIMER_STATE
                {
                        TIMER_UNSET = 0,
                        TIMER_RUNNING = 1,
                        TIMER_RESET = 2,
                        TIMER_STOPPED = 3,
                        TIMER_CANCELLED = 4
                };

                StatefulConditional<Timer::TIMER_STATE, TIMER_STOPPED> _state;
                TimerCallback &_callback;
                size_t _timeout;
        public:
                class StopTimerException : public ibrcommon::Exception
                {
                public:
                        StopTimerException(const std::string& what = "") : Exception(what)
                        {
                        }
                };
        };
}

#endif /* TIMER_H_ */