blocked_range2d.h
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/*
Copyright (c) 2005-2020 Intel Corporation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef __TBB_blocked_range2d_H
#define __TBB_blocked_range2d_H
#include "tbb_stddef.h"
#include "blocked_range.h"
namespace tbb {
template<typename RowValue, typename ColValue=RowValue>
class blocked_range2d {
public:
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)
{}
bool empty() const {
// Range is empty if at least one dimension is empty.
return my_rows.empty() || my_cols.empty();
}
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 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 */
const row_range_type& rows() const {return my_rows;}
const col_range_type& cols() const {return my_cols;}
private:
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);
}
}
};
} // namespace tbb
#endif /* __TBB_blocked_range2d_H */
tbb::blocked_range2d::my_cols
col_range_type my_cols
Definition: blocked_range2d.h:36
tbb::blocked_range2d::cols
const col_range_type & cols() const
The columns of the iteration space.
Definition: blocked_range2d.h:87
tbb::blocked_range2d
A 2-dimensional range that models the Range concept.
Definition: blocked_range2d.h:28
tbb::blocked_range2d::is_divisible
bool is_divisible() const
True if range is divisible into two pieces.
Definition: blocked_range2d.h:59
tbb
The graph class.
Definition: serial/tbb/parallel_for.h:46
blocked_range.h
tbb::blocked_range< RowValue >::size_type
std::size_t size_type
Type for size of a range.
Definition: blocked_range.h:53
tbb::blocked_range::my_begin
Value my_begin
Definition: blocked_range.h:127
tbb::blocked_range< ColValue >::do_split
static ColValue do_split(blocked_range &r, split)
Auxiliary function used by the splitting constructor.
Definition: blocked_range.h:131
tbb::blocked_range< RowValue >
tbb::proportional_split
Type enables transmission of splitting proportion from partitioners to range objects.
Definition: tbb_stddef.h:426
tbb::blocked_range2d::blocked_range2d
blocked_range2d(blocked_range2d &r, split)
Definition: blocked_range2d.h:63
tbb::blocked_range2d::blocked_range2d
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)
Definition: blocked_range2d.h:40
tbb::blocked_range2d::my_rows
row_range_type my_rows
Definition: blocked_range2d.h:35
tbb::blocked_range2d::row_range_type
blocked_range< RowValue > row_range_type
Type for size of an iteration range.
Definition: blocked_range2d.h:31
tbb::blocked_range::grainsize
size_type grainsize() const
The grain size for this range.
Definition: blocked_range.h:82
tbb::blocked_range2d::rows
const row_range_type & rows() const
The rows of the iteration space.
Definition: blocked_range2d.h:84
tbb::blocked_range2d::do_split
void do_split(blocked_range2d &r, Split &split_obj)
Definition: blocked_range2d.h:92
tbb::blocked_range::size
size_type size() const
Size of the range.
Definition: blocked_range.h:76
tbb::blocked_range2d::blocked_range2d
blocked_range2d(RowValue row_begin, RowValue row_end, ColValue col_begin, ColValue col_end)
Definition: blocked_range2d.h:46
tbb::blocked_range::is_divisible
bool is_divisible() const
True if range is divisible.
Definition: blocked_range.h:93
tbb::blocked_range2d::empty
bool empty() const
True if range is empty.
Definition: blocked_range2d.h:53
tbb::blocked_range2d::is_splittable_in_proportion
static const bool is_splittable_in_proportion
Static field to support proportional split.
Definition: blocked_range2d.h:73
tbb::blocked_range2d::col_range_type
blocked_range< ColValue > col_range_type
Definition: blocked_range2d.h:32
tbb::blocked_range::empty
bool empty() const
True if range is empty.
Definition: blocked_range.h:89
tbb_stddef.h
tbb::blocked_range2d::blocked_range2d
blocked_range2d(blocked_range2d &r, proportional_split &proportion)
Definition: blocked_range2d.h:75
tbb::split
Dummy type that distinguishes splitting constructor from copy constructor.
Definition: tbb_stddef.h:416

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