shared-data.hpp

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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
 *  Main authors:
 *     Christian Schulte <schulte@gecode.org>
 *
 *  Copyright:
 *     Christian Schulte, 2017
 *
 *  This file is part of Gecode, the generic constraint
 *  development environment:
 *     http://www.gecode.org
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
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 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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 */

namespace Gecode {

  template<class Data>
  class SharedData : public SharedHandle {
  protected:
    class SDO : public SharedHandle::Object {
    public:
      const Data d;
      SDO(const Data& d0);
      virtual ~SDO(void);
    };
  public:
    SharedData(const Data& d);
    SharedData(void);
    SharedData(const SharedData& sd);
    SharedData& operator =(const SharedData& sd);
    const Data& operator ()(void) const;
    ~SharedData(void);
  };


  template<class Data>
  forceinline
  SharedData<Data>::SDO::SDO(const Data& d0)
    : d(d0) {}

  template<class Data>
  forceinline
  SharedData<Data>::SDO::~SDO(void) {}


  template<class Data>
  forceinline
  SharedData<Data>::SharedData(const Data& d) 
    : SharedHandle(new SDO(d)) {}

  template<class Data>
  forceinline
  SharedData<Data>::SharedData(void) {}

  template<class Data>
  forceinline
  SharedData<Data>::SharedData(const SharedData<Data>& sd)
    : SharedHandle(sd) {}

  template<class Data>
  forceinline SharedData<Data>&
  SharedData<Data>::operator =(const SharedData<Data>& sd) {
    return static_cast<SharedData&>(SharedHandle::operator =(sd));
  }

  template<class Data>
  forceinline const Data&
  SharedData<Data>::operator ()(void) const {
    return static_cast<SDO*>(object())->d;
  }

  template<class Data>
  forceinline
  SharedData<Data>::~SharedData(void) {}

}

// STATISTICS: kernel-other