Stokhos_DynamicArrayTraits.hpp

Go to the documentation of this file.

// $Id$ 
// $Source$ 
// @HEADER
// ***********************************************************************
// 
//                           Stokhos Package
//                 Copyright (2009) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Eric T. Phipps (etphipp@sandia.gov).
// 
// ***********************************************************************
// @HEADER
 
#ifndef STOKHOS_DYNAMICARRAYTRAITS_HPP
#define STOKHOS_DYNAMICARRAYTRAITS_HPP
 
#include <new>
#include <cstring>
 
namespace Stokhos {


  template <typename T> struct IsScalarType {
    static const bool value = false;
  };

#define STOKHOS_BUILTIN_SPECIALIZATION(t)                  \
  template <> struct IsScalarType< t > {            \
    static const bool value = true;             \
  };
 
  STOKHOS_BUILTIN_SPECIALIZATION(float)
  STOKHOS_BUILTIN_SPECIALIZATION(double)
  STOKHOS_BUILTIN_SPECIALIZATION(int)
  STOKHOS_BUILTIN_SPECIALIZATION(long)
 
#undef STOKHOS_BUILTIN_SPECIALIZATION
  

  template <typename T, bool isScalar = IsScalarType<T>::value>
  struct ds_array {

    static inline T* get_and_fill(int sz) {
      T* m = static_cast<T* >(operator new(sz*sizeof(T)));
      T* p = m;
      for (int i=0; i<sz; ++i)
  new (p++) T(0.0);
      return m;
    }

    static inline T* get_and_fill(const T* src, int sz) {
      T* m = static_cast<T* >(operator new(sz*sizeof(T)));
      T* p = m; 
      for (int i=0; i<sz; ++i)
  new (p++) T(*(src++));
      return m;
    }

    static inline void copy(const T* src, T*  dest, int sz) {
      for (int i=0; i<sz; ++i)
  *(dest++) = *(src++);
    }

    static inline void zero(T* dest, int sz) {
      for (int i=0; i<sz; ++i)
  *(dest++) = T(0.);
    }

    static inline void destroy_and_release(T* m, int sz) {
      T* e = m+sz;
      for (T* b = m; b!=e; b++)
  b->~T();
      operator delete((void*) m);
    }
  };

  template <typename T>
  struct ds_array<T,true> {

    static inline T* get_and_fill(int sz) {
      T* m = static_cast<T* >(operator new(sz*sizeof(T)));
      std::memset(m,0,sz*sizeof(T));
      return m;
    }

    static inline T* get_and_fill(const T* src, int sz) {
      T* m = static_cast<T* >(operator new(sz*sizeof(T)));
      for (int i=0; i<sz; ++i)
  m[i] = src[i];
      return m;
    }

    static inline void copy(const T* src, T* dest, int sz) {
      std::memcpy(dest,src,sz*sizeof(T));
    }

    static inline void zero(T* dest, int sz) {
      std::memset(dest,0,sz*sizeof(T));
    }

    static inline void destroy_and_release(T* m, int sz) {
      operator delete((void*) m);
      }
  };
 
} // namespace Stokhos
 
#endif // STOKHOS_DYNAMICARRAYTRAITS_HPP