memory.h

/*
 * Copyright (c) 2008-2018 the MRtrix3 contributors.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, you can obtain one at http://mozilla.org/MPL/2.0/
 *
 * MRtrix3 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.
 *
 * For more details, see http://www.mrtrix.org/
 */


#ifndef __memory_h__
#define __memory_h__

#include <memory>

#define NOMEMALIGN

/** \defgroup Memory Memory management
 * \brief Classes & functions to ease memory management. */

namespace MR
{

  template<class T, class Deleter = std::default_delete<T>> 
    class copy_ptr : public std::unique_ptr<T, Deleter>
  { NOMEMALIGN
    public:
      constexpr copy_ptr () noexcept : std::unique_ptr<T,Deleter>() { }
      constexpr copy_ptr (std::nullptr_t) noexcept : std::unique_ptr<T,Deleter>() { }
      explicit copy_ptr (T* p) noexcept : std::unique_ptr<T,Deleter> (p) { }
      copy_ptr (const copy_ptr& u) : std::unique_ptr<T,Deleter>(u ? new T (*u) : nullptr) { }
      copy_ptr (copy_ptr&& u) noexcept : std::unique_ptr<T,Deleter>(std::move(u)) { }
      template< class U, class E >
        copy_ptr (copy_ptr<U, E>&& u) noexcept : std::unique_ptr<T,Deleter>(std::move(u)) { }

      copy_ptr& operator=(const copy_ptr& u) { this->reset (u ? new T (*u) : nullptr); return *this; }
  };

  struct compare_ptr_contents { NOMEMALIGN
    template <class X>
      bool operator() (const X& a, const X& b) const { return *a < *b; }
  };

}

#endif