Intel(R) Threading Building Blocks Doxygen Documentation  version 4.2.3
blocked_range2d.h
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1 /*
2  Copyright (c) 2005-2020 Intel Corporation
3 
4  Licensed under the Apache License, Version 2.0 (the "License");
5  you may not use this file except in compliance with the License.
6  You may obtain a copy of the License at
7 
8  http://www.apache.org/licenses/LICENSE-2.0
9 
10  Unless required by applicable law or agreed to in writing, software
11  distributed under the License is distributed on an "AS IS" BASIS,
12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  See the License for the specific language governing permissions and
14  limitations under the License.
15 */
16 
17 #ifndef __TBB_blocked_range2d_H
18 #define __TBB_blocked_range2d_H
19 
20 #include "tbb_stddef.h"
21 #include "blocked_range.h"
22 
23 namespace tbb {
24 
26 
27 template<typename RowValue, typename ColValue=RowValue>
29 public:
33 
34 private:
37 
38 public:
39 
40  blocked_range2d( RowValue row_begin, RowValue row_end, typename row_range_type::size_type row_grainsize,
41  ColValue col_begin, ColValue col_end, typename col_range_type::size_type col_grainsize ) :
42  my_rows(row_begin,row_end,row_grainsize),
43  my_cols(col_begin,col_end,col_grainsize)
44  {}
45 
46  blocked_range2d( RowValue row_begin, RowValue row_end,
47  ColValue col_begin, ColValue col_end ) :
48  my_rows(row_begin,row_end),
49  my_cols(col_begin,col_end)
50  {}
51 
53  bool empty() const {
54  // Range is empty if at least one dimension is empty.
55  return my_rows.empty() || my_cols.empty();
56  }
57 
59  bool is_divisible() const {
61  }
62 
64  my_rows(r.my_rows),
65  my_cols(r.my_cols)
66  {
67  split split_obj;
68  do_split(r, split_obj);
69  }
70 
71 #if __TBB_USE_PROPORTIONAL_SPLIT_IN_BLOCKED_RANGES
72  static const bool is_splittable_in_proportion = true;
74 
76  my_rows(r.my_rows),
77  my_cols(r.my_cols)
78  {
79  do_split(r, proportion);
80  }
81 #endif /* __TBB_USE_PROPORTIONAL_SPLIT_IN_BLOCKED_RANGES */
82 
84  const row_range_type& rows() const {return my_rows;}
85 
87  const col_range_type& cols() const {return my_cols;}
88 
89 private:
90 
91  template <typename Split>
92  void do_split( blocked_range2d& r, Split& split_obj )
93  {
94  if( my_rows.size()*double(my_cols.grainsize()) < my_cols.size()*double(my_rows.grainsize()) ) {
96  } else {
98  }
99  }
100 };
101 
102 } // namespace tbb
103 
104 #endif /* __TBB_blocked_range2d_H */
bool is_divisible() const
True if range is divisible.
Definition: blocked_range.h:93
const col_range_type & cols() const
The columns of the iteration space.
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)
std::size_t size_type
Type for size of a range.
Definition: blocked_range.h:53
row_range_type my_rows
static const bool is_splittable_in_proportion
Static field to support proportional split.
blocked_range< ColValue > col_range_type
Dummy type that distinguishes splitting constructor from copy constructor.
Definition: tbb_stddef.h:416
static ColValue do_split(blocked_range &r, split)
Auxiliary function used by the splitting constructor.
size_type size() const
Size of the range.
Definition: blocked_range.h:76
blocked_range2d(RowValue row_begin, RowValue row_end, ColValue col_begin, ColValue col_end)
size_type grainsize() const
The grain size for this range.
Definition: blocked_range.h:82
void do_split(blocked_range2d &r, Split &split_obj)
const row_range_type & rows() const
The rows of the iteration space.
bool empty() const
True if range is empty.
blocked_range2d(blocked_range2d &r, split)
col_range_type my_cols
Type enables transmission of splitting proportion from partitioners to range objects.
Definition: tbb_stddef.h:426
bool is_divisible() const
True if range is divisible into two pieces.
blocked_range2d(blocked_range2d &r, proportional_split &proportion)
A 2-dimensional range that models the Range concept.
The graph class.
blocked_range< RowValue > row_range_type
Type for size of an iteration range.
bool empty() const
True if range is empty.
Definition: blocked_range.h:89

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