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lib/kokkos/containers/src/impl/Kokkos_StaticCrsGraph_factory.hpp
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lib/kokkos/containers/src/impl/Kokkos_StaticCrsGraph_factory.hpp
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/*
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//@HEADER
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// ************************************************************************
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//
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// Kokkos v. 2.0
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// Copyright (2014) Sandia Corporation
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the Corporation nor the names of the
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
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//
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// ************************************************************************
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//@HEADER
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*/
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#ifndef KOKKOS_IMPL_STATICCRSGRAPH_FACTORY_HPP
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#define KOKKOS_IMPL_STATICCRSGRAPH_FACTORY_HPP
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//----------------------------------------------------------------------------
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//----------------------------------------------------------------------------
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namespace Kokkos {
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template< class DataType , class Arg1Type , class Arg2Type , typename SizeType >
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inline
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typename StaticCrsGraph< DataType , Arg1Type , Arg2Type , SizeType >::HostMirror
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create_mirror_view( const StaticCrsGraph<DataType,Arg1Type,Arg2Type,SizeType > & view ,
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typename Impl::enable_if< ViewTraits<DataType,Arg1Type,Arg2Type,void>::is_hostspace >::type * = 0 )
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{
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return view ;
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}
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template< class DataType , class Arg1Type , class Arg2Type , typename SizeType >
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inline
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typename StaticCrsGraph< DataType , Arg1Type , Arg2Type , SizeType >::HostMirror
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create_mirror( const StaticCrsGraph<DataType,Arg1Type,Arg2Type,SizeType > & view )
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{
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// Force copy:
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//typedef Impl::ViewAssignment< Impl::ViewDefault > alloc ; // unused
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typedef StaticCrsGraph< DataType , Arg1Type , Arg2Type , SizeType > staticcrsgraph_type ;
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typename staticcrsgraph_type::HostMirror tmp ;
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typename staticcrsgraph_type::row_map_type::HostMirror tmp_row_map = create_mirror( view.row_map);
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// Allocation to match:
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tmp.row_map = tmp_row_map ; // Assignment of 'const' from 'non-const'
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tmp.entries = create_mirror( view.entries );
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// Deep copy:
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deep_copy( tmp_row_map , view.row_map );
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deep_copy( tmp.entries , view.entries );
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return tmp ;
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}
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template< class DataType , class Arg1Type , class Arg2Type , typename SizeType >
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inline
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typename StaticCrsGraph< DataType , Arg1Type , Arg2Type , SizeType >::HostMirror
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create_mirror_view( const StaticCrsGraph<DataType,Arg1Type,Arg2Type,SizeType > & view ,
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typename Impl::enable_if< ! ViewTraits<DataType,Arg1Type,Arg2Type,void>::is_hostspace >::type * = 0 )
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{
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return create_mirror( view );
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}
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} // namespace Kokkos
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//----------------------------------------------------------------------------
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//----------------------------------------------------------------------------
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namespace Kokkos {
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template< class StaticCrsGraphType , class InputSizeType >
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inline
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typename StaticCrsGraphType::staticcrsgraph_type
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create_staticcrsgraph( const std::string & label ,
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const std::vector< InputSizeType > & input )
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{
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typedef StaticCrsGraphType output_type ;
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//typedef std::vector< InputSizeType > input_type ; // unused
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typedef typename output_type::entries_type entries_type ;
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typedef View< typename output_type::size_type [] ,
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typename output_type::array_layout ,
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typename output_type::execution_space > work_type ;
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output_type output ;
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// Create the row map:
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const size_t length = input.size();
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{
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work_type row_work( "tmp" , length + 1 );
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typename work_type::HostMirror row_work_host =
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create_mirror_view( row_work );
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size_t sum = 0 ;
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row_work_host[0] = 0 ;
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for ( size_t i = 0 ; i < length ; ++i ) {
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row_work_host[i+1] = sum += input[i];
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}
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deep_copy( row_work , row_work_host );
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output.entries = entries_type( label , sum );
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output.row_map = row_work ;
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}
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return output ;
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}
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//----------------------------------------------------------------------------
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template< class StaticCrsGraphType , class InputSizeType >
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inline
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typename StaticCrsGraphType::staticcrsgraph_type
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create_staticcrsgraph( const std::string & label ,
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const std::vector< std::vector< InputSizeType > > & input )
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{
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typedef StaticCrsGraphType output_type ;
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typedef typename output_type::entries_type entries_type ;
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static_assert( entries_type::rank == 1
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, "Graph entries view must be rank one" );
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typedef View< typename output_type::size_type [] ,
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typename output_type::array_layout ,
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typename output_type::execution_space > work_type ;
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output_type output ;
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// Create the row map:
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const size_t length = input.size();
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{
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work_type row_work( "tmp" , length + 1 );
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typename work_type::HostMirror row_work_host =
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create_mirror_view( row_work );
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size_t sum = 0 ;
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row_work_host[0] = 0 ;
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for ( size_t i = 0 ; i < length ; ++i ) {
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row_work_host[i+1] = sum += input[i].size();
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}
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deep_copy( row_work , row_work_host );
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output.entries = entries_type( label , sum );
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output.row_map = row_work ;
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}
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// Fill in the entries:
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{
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typename entries_type::HostMirror host_entries =
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create_mirror_view( output.entries );
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size_t sum = 0 ;
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for ( size_t i = 0 ; i < length ; ++i ) {
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for ( size_t j = 0 ; j < input[i].size() ; ++j , ++sum ) {
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host_entries( sum ) = input[i][j] ;
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}
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}
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deep_copy( output.entries , host_entries );
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}
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return output ;
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}
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} // namespace Kokkos
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//----------------------------------------------------------------------------
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//----------------------------------------------------------------------------
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#endif /* #ifndef KOKKOS_IMPL_CRSARRAY_FACTORY_HPP */
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