timer_object.hpp

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// timer_object.hpp
/*
 *  Copyright (c) 2020 Leigh Johnston.
 *
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  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.
 *
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 *     * Neither the name of Leigh Johnston nor the names of any
 *       other contributors to this software may be used to endorse or
 *       promote products derived from this software without specific prior
 *       written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 *  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 *  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#pragma once
 
#include <neolib/neolib.hpp>
#include <optional>
#include <set>
#include <chrono>
#include <neolib/task/i_async_task.hpp>
#include <neolib/task/i_timer_object.hpp>
 
namespace neolib
{
    class NEOLIB_EXPORT timer_object : public lifetime<reference_counted<i_timer_object>>
    {
    public:
        timer_object(i_timer_service& aService);
        ~timer_object();
    public:
        void expires_at(const std::chrono::steady_clock::time_point& aDeadline) override;
        void async_wait(i_timer_subscriber& aSubscriber) override;
        void unsubscribe(i_timer_subscriber& aSubscriber) override;
        void cancel() override;
    public:
        bool poll() override;
    public:
        bool debug() const override;
        void set_debug(bool aDebug) override;
    private:
        i_timer_service& iService;
        std::optional<std::chrono::steady_clock::time_point> iExpiryTime;
        mutable std::recursive_mutex iSubscribersMutex;
        std::set<ref_ptr<i_timer_subscriber>> iSubscribers;
#if !defined(NDEBUG) || defined(DEBUG_TIMER_OBJECTS)
        bool iDebug = false;
#endif
    };
}