workunitkey.cpp

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// The DAGFrameScheduler is a Multi-Threaded lock free and wait free scheduling library.
// © Copyright 2010 - 2016 BlackTopp Studios Inc.
/* This file is part of The DAGFrameScheduler.

    The DAGFrameScheduler 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 3 of the License, or
    (at your option) any later version.

    The DAGFrameScheduler 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 The DAGFrameScheduler.  If not, see <http://www.gnu.org/licenses/>.
*/
/* The original authors have included a copy of the license specified above in the
   'doc' folder. See 'gpl.txt'
*/
/* We welcome the use of the DAGFrameScheduler to anyone, including companies who wish to
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   However there are some practical restrictions, so if your project involves
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   Joseph Toppi - toppij@gmail.com
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*/
#ifndef _timeddagworkunitkey_cpp
#define _timeddagworkunitkey_cpp

#include "workunitkey.h"


/// @file
/// @brief This file declares the functionality of the metadata used to sort the @ref Mezzanine::Threading::iWorkUnit "iWorkUnit"s.

namespace Mezzanine
{
    namespace Threading
    {
        WorkUnitKey::WorkUnitKey()
            : Unit(0), Dependers(0), Time(0)
            {}

        WorkUnitKey::WorkUnitKey(const Whole& Dependers_, const Whole& Time_, iWorkUnit* WorkUnit_)
            : Unit(WorkUnit_), Dependers(Dependers_), Time(Time_)
            {}

        WorkUnitKey::~WorkUnitKey()
            {}

        bool WorkUnitKey::operator< (const WorkUnitKey& rhs ) const
        {
            if (this->Dependers < rhs.Dependers) // reduce priority of Items with fewer dependents
                { return true; }
            if (this->Dependers == rhs.Dependers)
            {
                if (this->Time < rhs.Time)       // reduce priority of faster workunits
                    { return true; }
                if (this->Time == rhs.Time)
                    { return this->Unit < rhs.Unit; }
            }
            return false;
        }

        bool WorkUnitKey::operator ==(const WorkUnitKey &rhs) const
            { return Unit == rhs.Unit; }
    }//Threading
}//Mezzanine
#endif