/*
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//                        Kokkos v. 2.0
//              Copyright (2014) Sandia Corporation
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#include <cstdio>

#include <Kokkos_Core.hpp>

namespace Test {

namespace {

template< class ExecSpace, class ScheduleType >
struct TestRange {
  typedef int value_type; ///< typedef required for the parallel_reduce

  typedef Kokkos::View< int*, ExecSpace > view_type;

  view_type m_flags;

  struct VerifyInitTag {};
  struct ResetTag {};
  struct VerifyResetTag {};

  int N; 
  TestRange( const size_t N_ )
    : m_flags( Kokkos::ViewAllocateWithoutInitializing( "flags" ), N_ ), N(N_)
    {}

  void test_for()
  {

    typename view_type::HostMirror host_flags = Kokkos::create_mirror_view( m_flags );

    Kokkos::parallel_for( Kokkos::RangePolicy< ExecSpace, ScheduleType >( 0, N ), *this );
    Kokkos::parallel_for( Kokkos::RangePolicy< ExecSpace, ScheduleType, VerifyInitTag >( 0, N ), *this );

    Kokkos::deep_copy( host_flags, m_flags );

    int error_count = 0;
    for ( int i = 0; i < N; ++i ) {
      if ( int( i ) != host_flags( i ) ) ++error_count;
    }
    ASSERT_EQ( error_count, int( 0 ) );

    Kokkos::parallel_for( Kokkos::RangePolicy< ExecSpace, ScheduleType, ResetTag >( 0, N ), *this );
    Kokkos::parallel_for( std::string( "TestKernelFor" ), Kokkos::RangePolicy< ExecSpace, ScheduleType, VerifyResetTag >( 0, N ), *this );

    Kokkos::deep_copy( host_flags, m_flags );

    error_count = 0;
    for ( int i = 0; i < N; ++i ) {
      if ( int( 2 * i ) != host_flags( i ) ) ++error_count;
    }
    ASSERT_EQ( error_count, int( 0 ) );
  }

  KOKKOS_INLINE_FUNCTION
  void operator()( const int i ) const
  { m_flags( i )  = i; }

  KOKKOS_INLINE_FUNCTION
  void operator()( const VerifyInitTag &, const int i ) const
  {
    if ( i != m_flags( i ) ) {
      printf( "TestRange::test_for error at %d != %d\n", i, m_flags( i ) );
    }
  }

  KOKKOS_INLINE_FUNCTION
  void operator()( const ResetTag &, const int i ) const
  { m_flags( i ) = 2 * m_flags( i ); }

  KOKKOS_INLINE_FUNCTION
  void operator()( const VerifyResetTag &, const int i ) const
  {
    if ( 2 * i != m_flags( i ) )
    {
      printf( "TestRange::test_for error at %d != %d\n", i, m_flags( i ) );
    }
  }

  //----------------------------------------

  struct OffsetTag {};

  void test_reduce( )
  {
    int total = 0;

    Kokkos::parallel_for( Kokkos::RangePolicy< ExecSpace, ScheduleType >( 0, N ), *this );

    Kokkos::parallel_reduce( "TestKernelReduce", Kokkos::RangePolicy< ExecSpace, ScheduleType >( 0, N ), *this, total );
    // sum( 0 .. N-1 )
    ASSERT_EQ( size_t( ( N - 1 ) * ( N ) / 2 ), size_t( total ) );

    Kokkos::parallel_reduce( Kokkos::RangePolicy< ExecSpace, ScheduleType, OffsetTag>( 0, N ), *this, total );
    // sum( 1 .. N )
    ASSERT_EQ( size_t( ( N ) * ( N + 1 ) / 2 ), size_t( total ) );
  }

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

  KOKKOS_INLINE_FUNCTION
  void operator()( const OffsetTag &, const int i, value_type & update ) const
  { update += 1 + m_flags( i ); }

  //----------------------------------------

  void test_scan( )
  {

    Kokkos::parallel_for( Kokkos::RangePolicy< ExecSpace, ScheduleType >( 0, N ), *this );

    Kokkos::parallel_scan( "TestKernelScan", Kokkos::RangePolicy< ExecSpace, ScheduleType, OffsetTag>( 0, N ), *this );
  }

  KOKKOS_INLINE_FUNCTION
  void operator()( const OffsetTag &, const int i, value_type & update, bool final ) const
  {
    update += m_flags( i );

    if ( final ) {
      if ( update != ( i * ( i + 1 ) ) / 2 ) {
        printf( "TestRange::test_scan error %d : %d != %d\n", i, ( i * ( i + 1 ) ) / 2, m_flags( i ) );
      }
    }
  }

  void test_dynamic_policy()
  {
#if defined(KOKKOS_ENABLE_CXX11_DISPATCH_LAMBDA) 
   #if !defined(KOKKOS_ENABLE_CUDA) || ( 8000 <= CUDA_VERSION )
     typedef Kokkos::RangePolicy< ExecSpace, Kokkos::Schedule<Kokkos::Dynamic> > policy_t;

    {
      Kokkos::View< size_t*, ExecSpace, Kokkos::MemoryTraits<Kokkos::Atomic> > count( "Count", ExecSpace::concurrency() );
      Kokkos::View< int*, ExecSpace > a( "A", N );

      Kokkos::parallel_for( policy_t( 0, N ), KOKKOS_LAMBDA ( const int& i ) {
        for ( int k = 0; k < ( i < N / 2 ? 1 : 10000 ); k++ ) {
          a( i )++;
        }
        count( ExecSpace::hardware_thread_id() )++;
      });

      int error = 0;
      Kokkos::parallel_reduce( Kokkos::RangePolicy< ExecSpace >( 0, N ), KOKKOS_LAMBDA( const int & i, int & lsum ) {
        lsum += ( a( i ) != ( i < N / 2 ? 1 : 10000 ) );
      }, error );
      ASSERT_EQ( error, 0 );

      if ( ( ExecSpace::concurrency() > (int) 1 ) && ( N > static_cast<int>( 4 * ExecSpace::concurrency() ) ) ) {
        size_t min = N;
        size_t max = 0;
        for ( int t = 0; t < ExecSpace::concurrency(); t++ ) {
          if ( count( t ) < min ) min = count( t );
          if ( count( t ) > max ) max = count( t );
        }
        ASSERT_TRUE( min < max );

        //if ( ExecSpace::concurrency() > 2 ) {
        //  ASSERT_TRUE( 2 * min < max );
        //}
      }
    }

    {
      Kokkos::View< size_t*, ExecSpace, Kokkos::MemoryTraits<Kokkos::Atomic> > count( "Count", ExecSpace::concurrency() );
      Kokkos::View< int*, ExecSpace> a( "A", N );

      int sum = 0;
      Kokkos::parallel_reduce( policy_t( 0, N ), KOKKOS_LAMBDA( const int & i, int & lsum ) {
        for ( int k = 0; k < ( i < N / 2 ? 1 : 10000 ); k++ ) {
          a( i )++;
        }
        count( ExecSpace::hardware_thread_id() )++;
        lsum++;
      }, sum );
      ASSERT_EQ( sum, N );

      int error = 0;
      Kokkos::parallel_reduce( Kokkos::RangePolicy< ExecSpace >( 0, N ), KOKKOS_LAMBDA( const int & i, int & lsum ) {
        lsum += ( a( i ) != ( i < N / 2 ? 1 : 10000 ) );
      }, error );
      ASSERT_EQ( error, 0 );

      if ( ( ExecSpace::concurrency() > (int) 1 ) && ( N > static_cast<int>( 4 * ExecSpace::concurrency() ) ) ) {
        size_t min = N;
        size_t max = 0;
        for ( int t = 0; t < ExecSpace::concurrency(); t++ ) {
          if ( count( t ) < min ) min = count( t );
          if ( count( t ) > max ) max = count( t );
        }
        ASSERT_TRUE( min < max );

        //if ( ExecSpace::concurrency() > 2 ) {
        //  ASSERT_TRUE( 2 * min < max );
        //}
      }
    }
#endif
#endif
  }
};

} // namespace

TEST_F( TEST_CATEGORY, range_for )
{
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Static> >f(0); f.test_for(); }
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(0); f.test_for(); }

  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Static> >f(2); f.test_for(); }
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(3); f.test_for(); }

  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Static> >f(1000); f.test_for(); }
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(1001); f.test_for(); }
}

TEST_F( TEST_CATEGORY, range_reduce )
{
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Static> >f(0); f.test_reduce(); }
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(0); f.test_reduce(); }

  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Static> >f(2); f.test_reduce(); }
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(3); f.test_reduce(); }

  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Static> >f(1000); f.test_reduce(); }
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(1001); f.test_reduce(); }
}

#ifndef KOKKOS_ENABLE_OPENMPTARGET 
TEST_F( TEST_CATEGORY, range_scan )
{
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Static> >f(0); f.test_scan(); }
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(0); f.test_scan(); }
#ifndef KOKKOS_ENABLE_CUDA
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(0); f.test_dynamic_policy(); }
#endif

  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Static> >f(2); f.test_scan(); }
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(3); f.test_scan(); }
#ifndef KOKKOS_ENABLE_CUDA
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(3); f.test_dynamic_policy(); }
#endif

  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Static> >f(1000); f.test_scan(); }
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(1001); f.test_scan(); }
#ifndef KOKKOS_ENABLE_CUDA
  { TestRange< TEST_EXECSPACE, Kokkos::Schedule<Kokkos::Dynamic> >f(1001); f.test_dynamic_policy(); }
#endif
}
#endif
} // namespace Test
