/*************************************************************************************

    Grid physics library, www.github.com/paboyle/Grid 

    Source file: ./lib/AlignedAllocator.h

    Copyright (C) 2015

Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
Author: Peter Boyle <paboyle@ph.ed.ac.uk>

    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.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

    See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/*  END LEGAL */
#pragma once

NAMESPACE_BEGIN(Grid);

template<typename _Tp>
class alignedAllocator {
public: 
  typedef std::size_t     size_type;
  typedef std::ptrdiff_t  difference_type;
  typedef _Tp*       pointer;
  typedef const _Tp* const_pointer;
  typedef _Tp&       reference;
  typedef const _Tp& const_reference;
  typedef _Tp        value_type;

  template<typename _Tp1>  struct rebind { typedef alignedAllocator<_Tp1> other; };
  alignedAllocator() throw() { }
  alignedAllocator(const alignedAllocator&) throw() { }
  template<typename _Tp1> alignedAllocator(const alignedAllocator<_Tp1>&) throw() { }
  ~alignedAllocator() throw() { }
  pointer       address(reference __x)       const { return &__x; }
  size_type  max_size() const throw() { return size_t(-1) / sizeof(_Tp); }

  pointer allocate(size_type __n, const void* _p= 0)
  { 
    size_type bytes = __n*sizeof(_Tp);

    profilerAllocate(bytes);

    _Tp *ptr = (_Tp*) MemoryManager::CpuAllocate(bytes);
    
    assert( ( (_Tp*)ptr != (_Tp *)NULL ) );

    return ptr;
  }

  void deallocate(pointer __p, size_type __n) 
  { 
    size_type bytes = __n * sizeof(_Tp);

    profilerFree(bytes);

    MemoryManager::CpuFree((void *)__p,bytes);
  }

  // FIXME: hack for the copy constructor, eventually it must be avoided
  void construct(pointer __p, const _Tp& __val) { new((void *)__p) _Tp(__val); };
  //void construct(pointer __p, const _Tp& __val) { };
  void construct(pointer __p) { };
  void destroy(pointer __p) { };
};
template<typename _Tp>  inline bool operator==(const alignedAllocator<_Tp>&, const alignedAllocator<_Tp>&){ return true; }
template<typename _Tp>  inline bool operator!=(const alignedAllocator<_Tp>&, const alignedAllocator<_Tp>&){ return false; }

////////////////////////////////////////////////////////////////////////////////
// Template typedefs
////////////////////////////////////////////////////////////////////////////////
template<class T> using commAllocator = alignedAllocator<T>;
template<class T> using Vector     = std::vector<T,alignedAllocator<T> >;           
template<class T> using commVector = std::vector<T,alignedAllocator<T> >;
template<class T> using Matrix     = std::vector<std::vector<T,alignedAllocator<T> > >;

NAMESPACE_END(Grid);