/usr/include/tbb/blocked_range2d.h is in libtbb-dev 4.4~20151115-0ubuntu3.
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Copyright 2005-2015 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 iteration 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)
{
split split_obj;
do_split(r, split_obj);
}
#if __TBB_USE_PROPORTIONAL_SPLIT_IN_BLOCKED_RANGES
//! Static field to support proportional split
static const bool is_splittable_in_proportion = true;
blocked_range2d( blocked_range2d& r, proportional_split& proportion ) :
my_rows(r.my_rows),
my_cols(r.my_cols)
{
do_split(r, proportion);
}
#endif /* __TBB_USE_PROPORTIONAL_SPLIT_IN_BLOCKED_RANGES */
template <typename Split>
void do_split( blocked_range2d& r, Split& split_obj )
{
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, split_obj);
} else {
my_rows.my_begin = row_range_type::do_split(r.my_rows, split_obj);
}
}
//! 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 */
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