Kokkos_LayoutContiguous.hpp

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//                 Copyright (2006) Sandia Corporation
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#ifndef KOKKOS_LAYOUT_CONTIGUOUS_HPP
#define KOKKOS_LAYOUT_CONTIGUOUS_HPP
 
#include "Kokkos_Core_fwd.hpp"
#include "Kokkos_Layout.hpp"
 
namespace Kokkos {
 
// Contiguous layout for scalar types -- equivalent to the wrapped
// layout type
template <typename Layout, unsigned Stride = 1>
struct LayoutContiguous : public Layout {
 
  enum { scalar_stride = Stride };
 
  typedef LayoutContiguous array_layout ;
 
  // Pull in Layout's constructors
  using Layout::Layout;
 
  KOKKOS_INLINE_FUNCTION
  constexpr LayoutContiguous( Layout const & layout ) : Layout(layout) {}
  KOKKOS_INLINE_FUNCTION
  constexpr LayoutContiguous( Layout && layout ) : Layout(layout) {}
};
 
// Is Layout == LayoutContiguous<L> for some L
template <class Layout>
struct is_layout_contiguous {
  static const bool value = false;
};
 
template <class Layout>
struct is_layout_contiguous< LayoutContiguous<Layout> > {
  static const bool value = true;
};
 
// Extract inner layout from LayoutContiguous
template <class Layout>
struct inner_layout {
  typedef Layout type;
};
 
template <class Layout>
struct inner_layout< LayoutContiguous<Layout> > {
  typedef Layout type;
};
 
template <class Layout, unsigned Stride>
struct inner_layout< LayoutContiguous<Layout, Stride> > {
  typedef Layout type;
};
 
} // namespace Kokkos
 
// Make LayoutContiguous<Layout> equivalent to Layout
namespace std {
 
  template <class Layout, unsigned Stride>
  struct is_same< Kokkos::LayoutContiguous<Layout,Stride>, Layout> {
    static const bool value = true;
  };
 
  template <class Layout, unsigned Stride>
  struct is_same< Layout, Kokkos::LayoutContiguous<Layout,Stride> > {
    static const bool value = true;
  };
 
}
 
#include "impl/Kokkos_ViewMapping.hpp"
 
namespace Kokkos {
namespace Impl {
 
// Implement ViewOffset for LayoutContiguous
template < class Dimension , class Layout , unsigned Stride >
struct ViewOffset<Dimension, LayoutContiguous<Layout,Stride>, void>
  : public ViewOffset<Dimension,Layout> {
public:
 
  // Would like to use inherited constructors, but gcc 4.7 doesn't support it
  //using ViewOffset<Dimension,Layout>::ViewOffset;
 
  typedef ViewOffset<Dimension,Layout> Base;
 
  ViewOffset() = default ;
  ViewOffset( const ViewOffset & ) = default ;
  ViewOffset & operator = ( const ViewOffset & ) = default ;
 
  // All constructors take one or two arguments
 
  template <typename Arg1>
  KOKKOS_INLINE_FUNCTION
  constexpr ViewOffset(const Arg1& arg1) : Base(arg1) {}
 
  template <typename Arg1, typename Arg2>
  KOKKOS_INLINE_FUNCTION
  constexpr ViewOffset(const Arg1& arg1, const Arg2& arg2) : Base(arg1,arg2) {}
};
 
template <typename Layout>
struct LayoutScalarStride {
  static const unsigned stride = 1;
  static const bool is_unit_stride = true;
};
 
template <typename Layout, unsigned Stride>
struct LayoutScalarStride< LayoutContiguous<Layout,Stride> > {
  static const unsigned stride = Stride;
  static const bool is_unit_stride = (Stride == 1);
};
 
} // namespace Impl
} // namespace Kokkos
 
#endif // #ifndef KOKKOS_LAYOUT_CONTIGUOUS_HPP