PassiveTimer.h

См. документацию.

/* This file is part of the UniSet project
 * Copyright (c) 2002 Free Software Foundation, Inc.
 * Copyright (c) 2002 Pavel Vainerman
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
// --------------------------------------------------------------------------
//----------------------------------------------------------------------------
# ifndef PASSIVETIMER_H_
# define PASSIVETIMER_H_
//----------------------------------------------------------------------------
#include <signal.h>
#include <cc++/socket.h>
#include <condition_variable>
#include <thread>
#include <mutex>
#include <atomic>
#include <chrono>
#include "Mutex.h"
//----------------------------------------------------------------------------------------
class UniSetTimer
{
    public:
        virtual ~UniSetTimer() {};

        virtual bool checkTime() const = 0;                     
        virtual timeout_t setTiming( timeout_t msec ) = 0;  
        virtual void reset() = 0;                           
        virtual timeout_t getCurrent() const = 0;       
        virtual timeout_t getInterval() const = 0;      
        timeout_t getLeft(timeout_t timeout)      
        {
            timeout_t ct = getCurrent();

            if( timeout <= ct )
                return 0;

            return timeout - ct;
        }

        // объявлены не чисто виртуальными т.к.
        // некоторые классы могут не иметь подобных
        // свойств.
        virtual bool wait(timeout_t timeMS)
        {
            return 0;   
        }
        virtual void terminate() {}                   
        virtual void stop()
        {
            terminate();
        };

        static const timeout_t WaitUpTime = TIMEOUT_INF;

        static const timeout_t MinQuantityTime = 10;
};
//----------------------------------------------------------------------------------------
class PassiveTimer:
    public UniSetTimer
{
    public:
        PassiveTimer();
        PassiveTimer( timeout_t msec ); 
        virtual ~PassiveTimer();

        virtual bool checkTime() const; 
        virtual timeout_t setTiming( timeout_t msec );     
        virtual void reset(); 
        virtual timeout_t getCurrent() const override;  
        virtual timeout_t getInterval() const override  
        {
            return (t_msec != UniSetTimer::WaitUpTime ? t_msec : 0);
        }

        virtual void terminate(); 
    protected:
        timeout_t t_msec = { 0 };  
        // Т.к. НЕ ВЕСЬ КОД переведён на использование std::chrono
        // везде используется timeout_t (и WaitUpTime)
        // отделяем внутреннее (теперь уже стандартное >= c++11)
        // представление для работы со временем (std::chrono)
        // и тип (t_msec) для "пользователей"
        std::chrono::high_resolution_clock::time_point t_start; 
        std::chrono::milliseconds t_inner_msec; 
    private:
};

//----------------------------------------------------------------------------------------
class PassiveCondTimer:
    public PassiveTimer
{
    public:

        PassiveCondTimer();
        virtual ~PassiveCondTimer();

        virtual bool wait(timeout_t t_msec);    
        virtual void terminate();        
    protected:

    private:
        std::atomic_bool terminated;
        std::mutex    m_working;
        std::condition_variable cv_working;
};
//----------------------------------------------------------------------------------------

class PassiveSigTimer:
    public PassiveTimer
{
    public:

        PassiveSigTimer();
        virtual ~PassiveSigTimer();

        virtual bool wait(timeout_t t_msec); //throw(UniSetTypes::NotSetSignal);
        virtual void terminate();

    protected:

    private:
        struct itimerval mtimer = { {0, 0}, {0, 0} };
        pid_t pid = { 0 };

        //        bool terminated;
        volatile sig_atomic_t terminated = { 0 };

        void init();

        static void callalrm(int signo );
        static void call(int signo, siginfo_t* evp, void* ucontext);

};

//----------------------------------------------------------------------------------------
# endif //PASSIVETIMER_H_