Intel(R) Threading Building Blocks Doxygen Documentation  version 4.2.3
blocked_range2d.h
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1 /*
2  Copyright (c) 2005-2019 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
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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.
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16 
17 
18 
19 */
20 
21 #ifndef __TBB_blocked_range2d_H
22 #define __TBB_blocked_range2d_H
23 
24 #include "tbb_stddef.h"
25 #include "blocked_range.h"
26 
27 namespace tbb {
28 
30 
31 template<typename RowValue, typename ColValue=RowValue>
33 public:
37 
38 private:
41 
42 public:
43 
44  blocked_range2d( RowValue row_begin, RowValue row_end, typename row_range_type::size_type row_grainsize,
45  ColValue col_begin, ColValue col_end, typename col_range_type::size_type col_grainsize ) :
46  my_rows(row_begin,row_end,row_grainsize),
47  my_cols(col_begin,col_end,col_grainsize)
48  {}
49 
50  blocked_range2d( RowValue row_begin, RowValue row_end,
51  ColValue col_begin, ColValue col_end ) :
52  my_rows(row_begin,row_end),
53  my_cols(col_begin,col_end)
54  {}
55 
57  bool empty() const {
58  // Range is empty if at least one dimension is empty.
59  return my_rows.empty() || my_cols.empty();
60  }
61 
63  bool is_divisible() const {
65  }
66 
68  my_rows(r.my_rows),
69  my_cols(r.my_cols)
70  {
71  split split_obj;
72  do_split(r, split_obj);
73  }
74 
75 #if __TBB_USE_PROPORTIONAL_SPLIT_IN_BLOCKED_RANGES
76  static const bool is_splittable_in_proportion = true;
78 
80  my_rows(r.my_rows),
81  my_cols(r.my_cols)
82  {
83  do_split(r, proportion);
84  }
85 #endif /* __TBB_USE_PROPORTIONAL_SPLIT_IN_BLOCKED_RANGES */
86 
88  const row_range_type& rows() const {return my_rows;}
89 
91  const col_range_type& cols() const {return my_cols;}
92 
93 private:
94 
95  template <typename Split>
96  void do_split( blocked_range2d& r, Split& split_obj )
97  {
98  if( my_rows.size()*double(my_cols.grainsize()) < my_cols.size()*double(my_rows.grainsize()) ) {
100  } else {
102  }
103  }
104 };
105 
106 } // namespace tbb
107 
108 #endif /* __TBB_blocked_range2d_H */
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)
Type enables transmission of splitting proportion from partitioners to range objects.
Definition: tbb_stddef.h:409
blocked_range< ColValue > col_range_type
blocked_range2d(blocked_range2d &r, proportional_split &proportion)
static const bool is_splittable_in_proportion
Static field to support proportional split.
blocked_range2d(RowValue row_begin, RowValue row_end, ColValue col_begin, ColValue col_end)
const col_range_type & cols() const
The columns of the iteration space.
const row_range_type & rows() const
The rows of the iteration space.
bool empty() const
True if range is empty.
static ColValue do_split(blocked_range &r, split)
Auxiliary function used by the splitting constructor.
row_range_type my_rows
size_type size() const
Size of the range.
Definition: blocked_range.h:80
The graph class.
bool empty() const
True if range is empty.
Definition: blocked_range.h:93
Dummy type that distinguishes splitting constructor from copy constructor.
Definition: tbb_stddef.h:399
void do_split(blocked_range2d &r, Split &split_obj)
bool is_divisible() const
True if range is divisible.
Definition: blocked_range.h:97
blocked_range2d(blocked_range2d &r, split)
size_type grainsize() const
The grain size for this range.
Definition: blocked_range.h:86
std::size_t size_type
Type for size of a range.
Definition: blocked_range.h:57
A 2-dimensional range that models the Range concept.
blocked_range< RowValue > row_range_type
Type for size of an iteration range.
bool is_divisible() const
True if range is divisible into two pieces.
col_range_type my_cols

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