2 Copyright 2005-2010 Intel Corporation. All Rights Reserved.
4 This file is part of Threading Building Blocks.
6 Threading Building Blocks is free software; you can redistribute it
7 and/or modify it under the terms of the GNU General Public License
8 version 2 as published by the Free Software Foundation.
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11 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
12 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
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16 along with Threading Building Blocks; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 As a special exception, you may use this file as part of a free software
20 library without restriction. Specifically, if other files instantiate
21 templates or use macros or inline functions from this file, or you compile
22 this file and link it with other files to produce an executable, this
23 file does not by itself cause the resulting executable to be covered by
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25 invalidate any other reasons why the executable file might be covered by
26 the GNU General Public License.
29 #ifndef __TBB_blocked_range2d_H
30 #define __TBB_blocked_range2d_H
32 #include "tbb_stddef.h"
33 #include "blocked_range.h"
37 //! A 2-dimensional range that models the Range concept.
38 /** @ingroup algorithms */
39 template<typename RowValue, typename ColValue=RowValue>
40 class blocked_range2d {
42 //! Type for size of an iteation range
43 typedef blocked_range<RowValue> row_range_type;
44 typedef blocked_range<ColValue> col_range_type;
47 row_range_type my_rows;
48 col_range_type my_cols;
52 blocked_range2d( RowValue row_begin, RowValue row_end, typename row_range_type::size_type row_grainsize,
53 ColValue col_begin, ColValue col_end, typename col_range_type::size_type col_grainsize ) :
54 my_rows(row_begin,row_end,row_grainsize),
55 my_cols(col_begin,col_end,col_grainsize)
59 blocked_range2d( RowValue row_begin, RowValue row_end,
60 ColValue col_begin, ColValue col_end ) :
61 my_rows(row_begin,row_end),
62 my_cols(col_begin,col_end)
66 //! True if range is empty
68 // Yes, it is a logical OR here, not AND.
69 return my_rows.empty() || my_cols.empty();
72 //! True if range is divisible into two pieces.
73 bool is_divisible() const {
74 return my_rows.is_divisible() || my_cols.is_divisible();
77 blocked_range2d( blocked_range2d& r, split ) :
81 if( my_rows.size()*double(my_cols.grainsize()) < my_cols.size()*double(my_rows.grainsize()) ) {
82 my_cols.my_begin = col_range_type::do_split(r.my_cols);
84 my_rows.my_begin = row_range_type::do_split(r.my_rows);
88 //! The rows of the iteration space
89 const row_range_type& rows() const {return my_rows;}
91 //! The columns of the iteration space
92 const col_range_type& cols() const {return my_cols;}
97 #endif /* __TBB_blocked_range2d_H */