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97 lines
3.3 KiB
97 lines
3.3 KiB
/*
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Copyright 2005-2013 Intel Corporation. All Rights Reserved.
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This file is part of Threading Building Blocks.
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Threading Building Blocks is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License
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version 2 as published by the Free Software Foundation.
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Threading Building Blocks is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Threading Building Blocks; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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As a special exception, you may use this file as part of a free software
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library without restriction. Specifically, if other files instantiate
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templates or use macros or inline functions from this file, or you compile
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this file and link it with other files to produce an executable, this
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file does not by itself cause the resulting executable to be covered by
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the GNU General Public License. This exception does not however
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invalidate any other reasons why the executable file might be covered by
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the GNU General Public License.
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*/
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#ifndef __TBB_blocked_range2d_H
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#define __TBB_blocked_range2d_H
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#include "tbb_stddef.h"
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#include "blocked_range.h"
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namespace tbb {
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//! A 2-dimensional range that models the Range concept.
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/** @ingroup algorithms */
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template<typename RowValue, typename ColValue=RowValue>
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class blocked_range2d {
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public:
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//! Type for size of an iteration range
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typedef blocked_range<RowValue> row_range_type;
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typedef blocked_range<ColValue> col_range_type;
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private:
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row_range_type my_rows;
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col_range_type my_cols;
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public:
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blocked_range2d( RowValue row_begin, RowValue row_end, typename row_range_type::size_type row_grainsize,
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ColValue col_begin, ColValue col_end, typename col_range_type::size_type col_grainsize ) :
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my_rows(row_begin,row_end,row_grainsize),
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my_cols(col_begin,col_end,col_grainsize)
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{
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}
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blocked_range2d( RowValue row_begin, RowValue row_end,
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ColValue col_begin, ColValue col_end ) :
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my_rows(row_begin,row_end),
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my_cols(col_begin,col_end)
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{
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}
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//! True if range is empty
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bool empty() const {
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// Yes, it is a logical OR here, not AND.
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return my_rows.empty() || my_cols.empty();
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}
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//! True if range is divisible into two pieces.
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bool is_divisible() const {
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return my_rows.is_divisible() || my_cols.is_divisible();
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}
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blocked_range2d( blocked_range2d& r, split ) :
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my_rows(r.my_rows),
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my_cols(r.my_cols)
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{
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if( my_rows.size()*double(my_cols.grainsize()) < my_cols.size()*double(my_rows.grainsize()) ) {
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my_cols.my_begin = col_range_type::do_split(r.my_cols);
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} else {
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my_rows.my_begin = row_range_type::do_split(r.my_rows);
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}
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}
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//! The rows of the iteration space
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const row_range_type& rows() const {return my_rows;}
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//! The columns of the iteration space
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const col_range_type& cols() const {return my_cols;}
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};
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} // namespace tbb
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#endif /* __TBB_blocked_range2d_H */
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