Timer.h

/*
* If not stated otherwise in this file or this component's LICENSE file the
* following copyright and licenses apply:
*
* Copyright 2020 Sky UK
*
* 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.
*/
/* 
 * File:   Timer.h
 * Author: jarek.dziedzic@bskyb.com
 *
 * Created on 29 May 2015
 */
 
#ifndef AICOMMON_TIMER_H
#define AICOMMON_TIMER_H
 
#include "Mutex.h"
#include "ConditionVariable.h"
 
#include <chrono>
#include <thread>
#include <functional>
 
namespace AICommon
{
    enum class TimerType
    {
        OneRun = 0,
        Recurring = 1
    };
 
    enum class TimerThreadPriority
    {
        Default,
        Low
    };
 
 
    class Timer
    {
 
    public:
        template<typename F, typename... Args>
        Timer(const std::chrono::milliseconds &timeout, F f, Args&&... args)
        {
            start(timeout, TimerType::OneRun, TimerThreadPriority::Default, std::bind(f, args...));
        }
 
        template<typename F, typename... Args>
        Timer(const std::chrono::milliseconds &timeout, TimerType type, TimerThreadPriority prio, F f, Args&&... args)
        {
            start(timeout, type, prio, std::bind(f, args...));
        }
 
        Timer(Timer&& other) = delete;
        Timer(const Timer&) = delete;
 
        Timer& operator=(Timer&& other) = delete;
        Timer& operator=(const Timer& other) = delete;
 
        ~Timer();
 
        void cancel();
 
 
    private:
        void start(const std::chrono::milliseconds &timeout, TimerType type, TimerThreadPriority prio, const std::function<void()> &callback);
 
        void singleShotTimer(TimerThreadPriority prio, const std::chrono::steady_clock::time_point &deadline);
        void recurringTimer(TimerThreadPriority prio, const std::chrono::milliseconds &interval);
 
    private:
        std::function<void()> mCallback;
 
        std::thread mTimerThread;
        Mutex mLock;
        ConditionVariable mCond;
        bool mCancel;
 
    };
 
} // namespace AICommon
 
#endif   // !defined(AICOMMON_TIMER_H)