/*
//@HEADER
// ************************************************************************
// 
//                        Kokkos v. 2.0
//              Copyright (2014) Sandia Corporation
// 
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
// 
// 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.
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// 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
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact  H. Carter Edwards (hcedwar@sandia.gov)
// 
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//@HEADER
*/

#include <Kokkos_Core.hpp>

#define KOKKOS_PRAGMA_UNROLL(a)

namespace {

template<class Scalar, class ExecutionSpace>
struct SumPlain {
  typedef ExecutionSpace execution_space;
  typedef typename Kokkos::View<Scalar*,execution_space> type;
  type view;
  SumPlain(type view_):view(view_) {}

  KOKKOS_INLINE_FUNCTION
  void operator() (int i, Scalar& val) {
    val += Scalar();
  }
};

template<class Scalar, class ExecutionSpace>
struct SumInitJoinFinalValueType {
  typedef ExecutionSpace execution_space;
  typedef typename Kokkos::View<Scalar*,execution_space> type;
  type view;
  typedef Scalar value_type;
  SumInitJoinFinalValueType(type view_):view(view_) {}

  KOKKOS_INLINE_FUNCTION
  void init(value_type& val) const {
    val = value_type();
  }

  KOKKOS_INLINE_FUNCTION
  void join(volatile value_type& val, volatile value_type& src) const {
    val += src;
  }

  KOKKOS_INLINE_FUNCTION
  void operator() (int i, value_type& val) const {
    val += value_type();
  }

};

template<class Scalar, class ExecutionSpace>
struct SumInitJoinFinalValueType2 {
  typedef ExecutionSpace execution_space;
  typedef typename Kokkos::View<Scalar*,execution_space> type;
  type view;
  typedef Scalar value_type;
  SumInitJoinFinalValueType2(type view_):view(view_) {}

  KOKKOS_INLINE_FUNCTION
  void init(volatile value_type& val) const {
    val = value_type();
  }

  KOKKOS_INLINE_FUNCTION
  void join(volatile value_type& val, const volatile value_type& src) const {
    val += src;
  }

  KOKKOS_INLINE_FUNCTION
  void operator() (int i, value_type& val) const {
    val += value_type();
  }

};

template<class Scalar, class ExecutionSpace>
struct SumInitJoinFinalValueTypeArray {
  typedef ExecutionSpace execution_space;
  typedef typename Kokkos::View<Scalar*,execution_space> type;
  type view;
  typedef Scalar value_type[];
  int n;
  SumInitJoinFinalValueTypeArray(type view_, int n_):view(view_),n(n_) {}

  KOKKOS_INLINE_FUNCTION
  void init(value_type val) const {
    for(int k=0;k<n;k++)
      val[k] = 0;
  }

  KOKKOS_INLINE_FUNCTION
  void join(volatile value_type val, const volatile value_type src) const {
    for(int k=0;k<n;k++)
      val[k] += src[k];
  }

  KOKKOS_INLINE_FUNCTION
  void operator() (int i, value_type val) const {
    for(int k=0;k<n;k++)
      val[k] += k*i;
  }

};

template<class Scalar, class ExecutionSpace>
struct SumWrongInitJoinFinalValueType {
  typedef ExecutionSpace execution_space;
  typedef typename Kokkos::View<Scalar*,execution_space> type;
  type view;
  typedef Scalar value_type;
  SumWrongInitJoinFinalValueType(type view_):view(view_) {}

  KOKKOS_INLINE_FUNCTION
  void init(double& val) const {
    val = double();
  }

  KOKKOS_INLINE_FUNCTION
  void join(volatile value_type& val, const value_type& src) const {
    val += src;
  }

  KOKKOS_INLINE_FUNCTION
  void operator() (int i, value_type& val) const {
    val += value_type();
  }

};

template<class Scalar, class ExecutionSpace>
void TestTemplateMetaFunctions() {
  typedef typename Kokkos::View<Scalar*,ExecutionSpace> type;
  type a("A",100);
/*  #ifdef KOKKOS_HAVE_CXX11
  int sum_plain_has_init_arg = Kokkos::Impl::FunctorHasInit<SumPlain<Scalar,ExecutionSpace>, Scalar& >::value;
  ASSERT_EQ(sum_plain_has_init_arg,0);
  int sum_initjoinfinalvaluetype_has_init_arg = Kokkos::Impl::FunctorHasInit<SumInitJoinFinalValueType<Scalar,ExecutionSpace>, Scalar >::value;
  ASSERT_EQ(sum_initjoinfinalvaluetype_has_init_arg,1);
  int sum_initjoinfinalvaluetype_has_init_arg2 = Kokkos::Impl::FunctorHasInit<SumInitJoinFinalValueType2<Scalar,ExecutionSpace>, Scalar >::value;
  ASSERT_EQ(sum_initjoinfinalvaluetype_has_init_arg2,1);
  int sum_wronginitjoinfinalvaluetype_has_init_arg = Kokkos::Impl::FunctorHasInit<SumWrongInitJoinFinalValueType<Scalar,ExecutionSpace>, Scalar >::value;
  ASSERT_EQ(sum_wronginitjoinfinalvaluetype_has_init_arg,0);

  //int sum_initjoinfinalvaluetypearray_has_init_arg = Kokkos::Impl::FunctorHasInit<SumInitJoinFinalValueTypeArray<Scalar,ExecutionSpace>, Scalar[] >::value;
  //ASSERT_EQ(sum_initjoinfinalvaluetypearray_has_init_arg,1);

  #else

  int sum_plain_has_init_arg = Kokkos::Impl::FunctorHasInit<SumPlain<Scalar,ExecutionSpace>, Scalar& >::value;
  ASSERT_EQ(sum_plain_has_init_arg,0);
  int sum_initjoinfinalvaluetype_has_init_arg = Kokkos::Impl::FunctorHasInit<SumInitJoinFinalValueType<Scalar,ExecutionSpace>, Scalar& >::value;
  ASSERT_EQ(sum_initjoinfinalvaluetype_has_init_arg,1);
  int sum_wronginitjoinfinalvaluetype_has_init_arg = Kokkos::Impl::FunctorHasInit<SumWrongInitJoinFinalValueType<Scalar,ExecutionSpace>, Scalar& >::value;
  ASSERT_EQ(sum_wronginitjoinfinalvaluetype_has_init_arg,1);

  #endif

  //printf("Values Init: %i %i %i\n",sum_plain_has_init_arg,sum_initjoinfinalvaluetype_has_init_arg,sum_wronginitjoinfinalvaluetype_has_init_arg);

#ifdef KOKKOS_HAVE_CXX11
  int sum_plain_has_join_arg = Kokkos::Impl::FunctorHasJoin<SumPlain<Scalar,ExecutionSpace>, Scalar >::value;
  ASSERT_EQ(sum_plain_has_join_arg,0);
  int sum_initjoinfinalvaluetype_has_join_arg = Kokkos::Impl::FunctorHasJoin<SumInitJoinFinalValueType<Scalar,ExecutionSpace>, Scalar >::value;
  ASSERT_EQ(sum_initjoinfinalvaluetype_has_join_arg,1);
  int sum_initjoinfinalvaluetype_has_join_arg2 = Kokkos::Impl::FunctorHasJoin<SumInitJoinFinalValueType2<Scalar,ExecutionSpace>, Scalar >::value;
  ASSERT_EQ(sum_initjoinfinalvaluetype_has_join_arg2,1);
  int sum_wronginitjoinfinalvaluetype_has_join_arg = Kokkos::Impl::FunctorHasJoin<SumWrongInitJoinFinalValueType<Scalar,ExecutionSpace>, Scalar >::value;
  ASSERT_EQ(sum_wronginitjoinfinalvaluetype_has_join_arg,0);
#else
  int sum_plain_has_join_arg = Kokkos::Impl::FunctorHasJoin<SumPlain<Scalar,ExecutionSpace>, Scalar& >::value;
  ASSERT_EQ(sum_plain_has_join_arg,0);
  int sum_initjoinfinalvaluetype_has_join_arg = Kokkos::Impl::FunctorHasJoin<SumInitJoinFinalValueType<Scalar,ExecutionSpace>, Scalar& >::value;
  ASSERT_EQ(sum_initjoinfinalvaluetype_has_join_arg,1);
  int sum_initjoinfinalvaluetype_has_join_arg2 = Kokkos::Impl::FunctorHasJoin<SumInitJoinFinalValueType2<Scalar,ExecutionSpace>, Scalar& >::value;
  ASSERT_EQ(sum_initjoinfinalvaluetype_has_join_arg2,1);
  int sum_wronginitjoinfinalvaluetype_has_join_arg = Kokkos::Impl::FunctorHasJoin<SumWrongInitJoinFinalValueType<Scalar,ExecutionSpace>, Scalar& >::value;
  ASSERT_EQ(sum_wronginitjoinfinalvaluetype_has_join_arg,1);
#endif*/
  //printf("Values Join: %i %i %i\n",sum_plain_has_join_arg,sum_initjoinfinalvaluetype_has_join_arg,sum_wronginitjoinfinalvaluetype_has_join_arg);
}

}