1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
|
// -*- C++ -*-
// Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License as published by the Free Software
// Foundation; either version 3, or (at your option) any later
// version.
// This library 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.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/**
* @file parallel/numeric
*
* @brief Parallel STL function calls corresponding to stl_numeric.h.
* The functions defined here mainly do case switches and
* call the actual parallelized versions in other files.
* Inlining policy: Functions that basically only contain one function call,
* are declared inline.
* This file is a GNU parallel extension to the Standard C++ Library.
*/
// Written by Johannes Singler and Felix Putze.
#ifndef _GLIBCXX_PARALLEL_NUMERIC_H
#define _GLIBCXX_PARALLEL_NUMERIC_H 1
#include <numeric>
#include <functional>
#include <parallel/numericfwd.h>
#include <parallel/iterator.h>
#include <parallel/for_each.h>
#include <parallel/for_each_selectors.h>
#include <parallel/partial_sum.h>
namespace std
{
namespace __parallel
{
// Sequential fallback.
template<typename _IIter, typename _Tp>
inline _Tp
accumulate(_IIter __begin, _IIter __end, _Tp __init,
__gnu_parallel::sequential_tag)
{ return _GLIBCXX_STD_P::accumulate(__begin, __end, __init); }
template<typename _IIter, typename _Tp, typename _BinaryOperation>
inline _Tp
accumulate(_IIter __begin, _IIter __end, _Tp __init,
_BinaryOperation __binary_op, __gnu_parallel::sequential_tag)
{ return _GLIBCXX_STD_P::accumulate(__begin, __end, __init, __binary_op); }
// Sequential fallback for input iterator case.
template<typename _IIter, typename _Tp, typename _IteratorTag>
inline _Tp
__accumulate_switch(_IIter __begin, _IIter __end,
_Tp __init, _IteratorTag)
{ return accumulate(__begin, __end, __init,
__gnu_parallel::sequential_tag()); }
template<typename _IIter, typename _Tp, typename _BinaryOperation,
typename _IteratorTag>
inline _Tp
__accumulate_switch(_IIter __begin, _IIter __end, _Tp __init,
_BinaryOperation __binary_op, _IteratorTag)
{ return accumulate(__begin, __end, __init, __binary_op,
__gnu_parallel::sequential_tag()); }
// Parallel algorithm for random access iterators.
template<typename __RAIter, typename _Tp,
typename _BinaryOperation>
_Tp
__accumulate_switch(__RAIter __begin, __RAIter __end,
_Tp __init, _BinaryOperation __binary_op,
random_access_iterator_tag,
__gnu_parallel::_Parallelism __parallelism_tag
= __gnu_parallel::parallel_unbalanced)
{
if (_GLIBCXX_PARALLEL_CONDITION(
static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin)
>= __gnu_parallel::_Settings::get().accumulate_minimal_n
&& __gnu_parallel::__is_parallel(__parallelism_tag)))
{
_Tp __res = __init;
__gnu_parallel::__accumulate_selector<__RAIter>
__my_selector;
__gnu_parallel::
__for_each_template_random_access_ed(__begin, __end,
__gnu_parallel::_Nothing(),
__my_selector,
__gnu_parallel::
__accumulate_binop_reduct
<_BinaryOperation>(__binary_op),
__res, __res, -1);
return __res;
}
else
return accumulate(__begin, __end, __init, __binary_op,
__gnu_parallel::sequential_tag());
}
// Public interface.
template<typename _IIter, typename _Tp>
inline _Tp
accumulate(_IIter __begin, _IIter __end, _Tp __init,
__gnu_parallel::_Parallelism __parallelism_tag)
{
typedef std::iterator_traits<_IIter> _IteratorTraits;
typedef typename _IteratorTraits::value_type _ValueType;
typedef typename _IteratorTraits::iterator_category _IteratorCategory;
return __accumulate_switch(__begin, __end, __init,
__gnu_parallel::_Plus<_Tp, _ValueType>(),
_IteratorCategory(), __parallelism_tag);
}
template<typename _IIter, typename _Tp>
inline _Tp
accumulate(_IIter __begin, _IIter __end, _Tp __init)
{
typedef std::iterator_traits<_IIter> _IteratorTraits;
typedef typename _IteratorTraits::value_type _ValueType;
typedef typename _IteratorTraits::iterator_category _IteratorCategory;
return __accumulate_switch(__begin, __end, __init,
__gnu_parallel::_Plus<_Tp, _ValueType>(),
_IteratorCategory());
}
template<typename _IIter, typename _Tp, typename _BinaryOperation>
inline _Tp
accumulate(_IIter __begin, _IIter __end, _Tp __init,
_BinaryOperation __binary_op,
__gnu_parallel::_Parallelism __parallelism_tag)
{
typedef iterator_traits<_IIter> _IteratorTraits;
typedef typename _IteratorTraits::iterator_category _IteratorCategory;
return __accumulate_switch(__begin, __end, __init, __binary_op,
_IteratorCategory(), __parallelism_tag);
}
template<typename _IIter, typename _Tp, typename _BinaryOperation>
inline _Tp
accumulate(_IIter __begin, _IIter __end, _Tp __init,
_BinaryOperation __binary_op)
{
typedef iterator_traits<_IIter> _IteratorTraits;
typedef typename _IteratorTraits::iterator_category _IteratorCategory;
return __accumulate_switch(__begin, __end, __init, __binary_op,
_IteratorCategory());
}
// Sequential fallback.
template<typename _IIter1, typename _IIter2, typename _Tp>
inline _Tp
inner_product(_IIter1 __first1, _IIter1 __last1,
_IIter2 __first2, _Tp __init,
__gnu_parallel::sequential_tag)
{ return _GLIBCXX_STD_P::inner_product(
__first1, __last1, __first2, __init); }
template<typename _IIter1, typename _IIter2, typename _Tp,
typename _BinaryFunction1, typename _BinaryFunction2>
inline _Tp
inner_product(_IIter1 __first1, _IIter1 __last1,
_IIter2 __first2, _Tp __init, _BinaryFunction1 __binary_op1,
_BinaryFunction2 __binary_op2,
__gnu_parallel::sequential_tag)
{ return _GLIBCXX_STD_P::inner_product(__first1, __last1, __first2, __init,
__binary_op1, __binary_op2); }
// Parallel algorithm for random access iterators.
template<typename _RAIter1, typename _RAIter2,
typename _Tp, typename _BinaryFunction1, typename _BinaryFunction2>
_Tp
__inner_product_switch(_RAIter1 __first1,
_RAIter1 __last1,
_RAIter2 __first2, _Tp __init,
_BinaryFunction1 __binary_op1,
_BinaryFunction2 __binary_op2,
random_access_iterator_tag,
random_access_iterator_tag,
__gnu_parallel::_Parallelism __parallelism_tag
= __gnu_parallel::parallel_unbalanced)
{
if (_GLIBCXX_PARALLEL_CONDITION((__last1 - __first1)
>= __gnu_parallel::_Settings::get().
accumulate_minimal_n
&& __gnu_parallel::
__is_parallel(__parallelism_tag)))
{
_Tp __res = __init;
__gnu_parallel::
__inner_product_selector<_RAIter1,
_RAIter2, _Tp> __my_selector(__first1, __first2);
__gnu_parallel::
__for_each_template_random_access_ed(
__first1, __last1, __binary_op2, __my_selector, __binary_op1,
__res, __res, -1);
return __res;
}
else
return inner_product(__first1, __last1, __first2, __init,
__gnu_parallel::sequential_tag());
}
// No parallelism for input iterators.
template<typename _IIter1, typename _IIter2, typename _Tp,
typename _BinaryFunction1, typename _BinaryFunction2,
typename _IteratorTag1, typename _IteratorTag2>
inline _Tp
__inner_product_switch(_IIter1 __first1, _IIter1 __last1,
_IIter2 __first2, _Tp __init,
_BinaryFunction1 __binary_op1,
_BinaryFunction2 __binary_op2,
_IteratorTag1, _IteratorTag2)
{ return inner_product(__first1, __last1, __first2, __init,
__binary_op1, __binary_op2,
__gnu_parallel::sequential_tag()); }
template<typename _IIter1, typename _IIter2, typename _Tp,
typename _BinaryFunction1, typename _BinaryFunction2>
inline _Tp
inner_product(_IIter1 __first1, _IIter1 __last1,
_IIter2 __first2, _Tp __init, _BinaryFunction1 __binary_op1,
_BinaryFunction2 __binary_op2,
__gnu_parallel::_Parallelism __parallelism_tag)
{
typedef iterator_traits<_IIter1> _TraitsType1;
typedef typename _TraitsType1::iterator_category _IteratorCategory1;
typedef iterator_traits<_IIter2> _TraitsType2;
typedef typename _TraitsType2::iterator_category _IteratorCategory2;
return __inner_product_switch(
__first1, __last1, __first2, __init, __binary_op1,
__binary_op2, _IteratorCategory1(), _IteratorCategory2(),
__parallelism_tag);
}
template<typename _IIter1, typename _IIter2, typename _Tp,
typename _BinaryFunction1, typename _BinaryFunction2>
inline _Tp
inner_product(_IIter1 __first1, _IIter1 __last1,
_IIter2 __first2, _Tp __init, _BinaryFunction1 __binary_op1,
_BinaryFunction2 __binary_op2)
{
typedef iterator_traits<_IIter1> _TraitsType1;
typedef typename _TraitsType1::iterator_category _IteratorCategory1;
typedef iterator_traits<_IIter2> _TraitsType2;
typedef typename _TraitsType2::iterator_category _IteratorCategory2;
return __inner_product_switch(
__first1, __last1, __first2, __init, __binary_op1, __binary_op2,
_IteratorCategory1(), _IteratorCategory2());
}
template<typename _IIter1, typename _IIter2, typename _Tp>
inline _Tp
inner_product(_IIter1 __first1, _IIter1 __last1,
_IIter2 __first2, _Tp __init,
__gnu_parallel::_Parallelism __parallelism_tag)
{
typedef iterator_traits<_IIter1> _TraitsType1;
typedef typename _TraitsType1::value_type _ValueType1;
typedef iterator_traits<_IIter2> _TraitsType2;
typedef typename _TraitsType2::value_type _ValueType2;
typedef typename
__gnu_parallel::_Multiplies<_ValueType1, _ValueType2>::__result
_MultipliesResultType;
return inner_product(__first1, __last1, __first2, __init,
__gnu_parallel::_Plus<_Tp, _MultipliesResultType>(),
__gnu_parallel::
_Multiplies<_ValueType1, _ValueType2>(),
__parallelism_tag);
}
template<typename _IIter1, typename _IIter2, typename _Tp>
inline _Tp
inner_product(_IIter1 __first1, _IIter1 __last1,
_IIter2 __first2, _Tp __init)
{
typedef iterator_traits<_IIter1> _TraitsType1;
typedef typename _TraitsType1::value_type _ValueType1;
typedef iterator_traits<_IIter2> _TraitsType2;
typedef typename _TraitsType2::value_type _ValueType2;
typedef typename
__gnu_parallel::_Multiplies<_ValueType1, _ValueType2>::__result
_MultipliesResultType;
return inner_product(__first1, __last1, __first2, __init,
__gnu_parallel::_Plus<_Tp, _MultipliesResultType>(),
__gnu_parallel::
_Multiplies<_ValueType1, _ValueType2>());
}
// Sequential fallback.
template<typename _IIter, typename _OutputIterator>
inline _OutputIterator
partial_sum(_IIter __begin, _IIter __end, _OutputIterator __result,
__gnu_parallel::sequential_tag)
{ return _GLIBCXX_STD_P::partial_sum(__begin, __end, __result); }
// Sequential fallback.
template<typename _IIter, typename _OutputIterator,
typename _BinaryOperation>
inline _OutputIterator
partial_sum(_IIter __begin, _IIter __end, _OutputIterator __result,
_BinaryOperation __bin_op, __gnu_parallel::sequential_tag)
{ return _GLIBCXX_STD_P::partial_sum(__begin, __end, __result, __bin_op); }
// Sequential fallback for input iterator case.
template<typename _IIter, typename _OutputIterator,
typename _BinaryOperation, typename _IteratorTag1,
typename _IteratorTag2>
inline _OutputIterator
__partial_sum_switch(_IIter __begin, _IIter __end,
_OutputIterator __result, _BinaryOperation __bin_op,
_IteratorTag1, _IteratorTag2)
{ return _GLIBCXX_STD_P::partial_sum(__begin, __end, __result, __bin_op); }
// Parallel algorithm for random access iterators.
template<typename _IIter, typename _OutputIterator,
typename _BinaryOperation>
_OutputIterator
__partial_sum_switch(_IIter __begin, _IIter __end,
_OutputIterator __result, _BinaryOperation __bin_op,
random_access_iterator_tag, random_access_iterator_tag)
{
if (_GLIBCXX_PARALLEL_CONDITION(
static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin)
>= __gnu_parallel::_Settings::get().partial_sum_minimal_n))
return __gnu_parallel::__parallel_partial_sum(__begin, __end,
__result, __bin_op);
else
return partial_sum(__begin, __end, __result, __bin_op,
__gnu_parallel::sequential_tag());
}
// Public interface.
template<typename _IIter, typename _OutputIterator>
inline _OutputIterator
partial_sum(_IIter __begin, _IIter __end, _OutputIterator __result)
{
typedef typename iterator_traits<_IIter>::value_type _ValueType;
return partial_sum(__begin, __end, __result, std::plus<_ValueType>());
}
// Public interface
template<typename _IIter, typename _OutputIterator,
typename _BinaryOperation>
inline _OutputIterator
partial_sum(_IIter __begin, _IIter __end, _OutputIterator __result,
_BinaryOperation __binary_op)
{
typedef iterator_traits<_IIter> _ITraitsType;
typedef typename _ITraitsType::iterator_category _IIteratorCategory;
typedef iterator_traits<_OutputIterator> _OTraitsType;
typedef typename _OTraitsType::iterator_category _OIterCategory;
return __partial_sum_switch(__begin, __end, __result, __binary_op,
_IIteratorCategory(), _OIterCategory());
}
// Sequential fallback.
template<typename _IIter, typename _OutputIterator>
inline _OutputIterator
adjacent_difference(_IIter __begin, _IIter __end, _OutputIterator __result,
__gnu_parallel::sequential_tag)
{ return _GLIBCXX_STD_P::adjacent_difference(__begin, __end, __result); }
// Sequential fallback.
template<typename _IIter, typename _OutputIterator,
typename _BinaryOperation>
inline _OutputIterator
adjacent_difference(_IIter __begin, _IIter __end,
_OutputIterator __result, _BinaryOperation __bin_op,
__gnu_parallel::sequential_tag)
{ return _GLIBCXX_STD_P::adjacent_difference(
__begin, __end, __result, __bin_op); }
// Sequential fallback for input iterator case.
template<typename _IIter, typename _OutputIterator,
typename _BinaryOperation, typename _IteratorTag1,
typename _IteratorTag2>
inline _OutputIterator
__adjacent_difference_switch(
_IIter __begin, _IIter __end, _OutputIterator __result,
_BinaryOperation __bin_op, _IteratorTag1, _IteratorTag2)
{ return adjacent_difference(__begin, __end, __result, __bin_op,
__gnu_parallel::sequential_tag()); }
// Parallel algorithm for random access iterators.
template<typename _IIter, typename _OutputIterator,
typename _BinaryOperation>
_OutputIterator
__adjacent_difference_switch(
_IIter __begin, _IIter __end, _OutputIterator __result,
_BinaryOperation __bin_op,
random_access_iterator_tag, random_access_iterator_tag,
__gnu_parallel::_Parallelism __parallelism_tag
= __gnu_parallel::parallel_balanced)
{
if (_GLIBCXX_PARALLEL_CONDITION(
static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin)
>= __gnu_parallel::_Settings::get().adjacent_difference_minimal_n
&& __gnu_parallel::__is_parallel(__parallelism_tag)))
{
bool __dummy = true;
typedef __gnu_parallel::_IteratorPair<_IIter, _OutputIterator,
random_access_iterator_tag> _ItTrip;
*__result = *__begin;
_ItTrip __begin_pair(__begin + 1, __result + 1),
__end_pair(__end, __result + (__end - __begin));
__gnu_parallel::__adjacent_difference_selector<_ItTrip>
__functionality;
__gnu_parallel::
__for_each_template_random_access_ed(
__begin_pair, __end_pair, __bin_op, __functionality,
__gnu_parallel::_DummyReduct(), __dummy, __dummy, -1);
return __functionality.finish_iterator;
}
else
return adjacent_difference(__begin, __end, __result, __bin_op,
__gnu_parallel::sequential_tag());
}
// Public interface.
template<typename _IIter, typename _OutputIterator>
inline _OutputIterator
adjacent_difference(_IIter __begin, _IIter __end,
_OutputIterator __result,
__gnu_parallel::_Parallelism __parallelism_tag)
{
typedef iterator_traits<_IIter> _TraitsType;
typedef typename _TraitsType::value_type _ValueType;
return adjacent_difference(
__begin, __end, __result, std::minus<_ValueType>(),
__parallelism_tag);
}
template<typename _IIter, typename _OutputIterator>
inline _OutputIterator
adjacent_difference(_IIter __begin, _IIter __end,
_OutputIterator __result)
{
typedef iterator_traits<_IIter> _TraitsType;
typedef typename _TraitsType::value_type _ValueType;
return adjacent_difference(__begin, __end, __result,
std::minus<_ValueType>());
}
template<typename _IIter, typename _OutputIterator,
typename _BinaryOperation>
inline _OutputIterator
adjacent_difference(_IIter __begin, _IIter __end,
_OutputIterator __result, _BinaryOperation __binary_op,
__gnu_parallel::_Parallelism __parallelism_tag)
{
typedef iterator_traits<_IIter> _ITraitsType;
typedef typename _ITraitsType::iterator_category _IIteratorCategory;
typedef iterator_traits<_OutputIterator> _OTraitsType;
typedef typename _OTraitsType::iterator_category _OIterCategory;
return __adjacent_difference_switch(
__begin, __end, __result, __binary_op,
_IIteratorCategory(), _OIterCategory(), __parallelism_tag);
}
template<typename _IIter, typename _OutputIterator,
typename _BinaryOperation>
inline _OutputIterator
adjacent_difference(_IIter __begin, _IIter __end,
_OutputIterator __result, _BinaryOperation __binary_op)
{
typedef iterator_traits<_IIter> _ITraitsType;
typedef typename _ITraitsType::iterator_category _IIteratorCategory;
typedef iterator_traits<_OutputIterator> _OTraitsType;
typedef typename _OTraitsType::iterator_category _OIterCategory;
return __adjacent_difference_switch(
__begin, __end, __result, __binary_op,
_IIteratorCategory(), _OIterCategory());
}
} // end namespace
} // end namespace
#endif /* _GLIBCXX_NUMERIC_H */
|
