| /* |
| Copyright 2005-2010 Intel Corporation. All Rights Reserved. |
| |
| This file is part of Threading Building Blocks. |
| |
| Threading Building Blocks is free software; you can redistribute it |
| and/or modify it under the terms of the GNU General Public License |
| version 2 as published by the Free Software Foundation. |
| |
| Threading Building Blocks is distributed in the hope that it will be |
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with Threading Building Blocks; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| As a special exception, you may use this file as part of a free software |
| library without restriction. Specifically, if other files instantiate |
| templates or use macros or inline functions from this file, or you compile |
| this file and link it with other files to produce an executable, this |
| file does not by itself cause the resulting executable to be covered by |
| the GNU General Public License. This exception does not however |
| invalidate any other reasons why the executable file might be covered by |
| the GNU General Public License. |
| */ |
| |
| #ifndef __TBB_blocked_range2d_H |
| #define __TBB_blocked_range2d_H |
| |
| #include "tbb_stddef.h" |
| #include "blocked_range.h" |
| |
| namespace tbb { |
| |
| //! A 2-dimensional range that models the Range concept. |
| /** @ingroup algorithms */ |
| template<typename RowValue, typename ColValue=RowValue> |
| class blocked_range2d { |
| public: |
| //! Type for size of an iteation range |
| typedef blocked_range<RowValue> row_range_type; |
| typedef blocked_range<ColValue> col_range_type; |
| |
| private: |
| row_range_type my_rows; |
| col_range_type my_cols; |
| |
| public: |
| |
| blocked_range2d( RowValue row_begin, RowValue row_end, typename row_range_type::size_type row_grainsize, |
| ColValue col_begin, ColValue col_end, typename col_range_type::size_type col_grainsize ) : |
| my_rows(row_begin,row_end,row_grainsize), |
| my_cols(col_begin,col_end,col_grainsize) |
| { |
| } |
| |
| blocked_range2d( RowValue row_begin, RowValue row_end, |
| ColValue col_begin, ColValue col_end ) : |
| my_rows(row_begin,row_end), |
| my_cols(col_begin,col_end) |
| { |
| } |
| |
| //! True if range is empty |
| bool empty() const { |
| // Yes, it is a logical OR here, not AND. |
| return my_rows.empty() || my_cols.empty(); |
| } |
| |
| //! True if range is divisible into two pieces. |
| bool is_divisible() const { |
| return my_rows.is_divisible() || my_cols.is_divisible(); |
| } |
| |
| blocked_range2d( blocked_range2d& r, split ) : |
| my_rows(r.my_rows), |
| my_cols(r.my_cols) |
| { |
| if( my_rows.size()*double(my_cols.grainsize()) < my_cols.size()*double(my_rows.grainsize()) ) { |
| my_cols.my_begin = col_range_type::do_split(r.my_cols); |
| } else { |
| my_rows.my_begin = row_range_type::do_split(r.my_rows); |
| } |
| } |
| |
| //! The rows of the iteration space |
| const row_range_type& rows() const {return my_rows;} |
| |
| //! The columns of the iteration space |
| const col_range_type& cols() const {return my_cols;} |
| }; |
| |
| } // namespace tbb |
| |
| #endif /* __TBB_blocked_range2d_H */ |
