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algo.h
// -*- C++ -*- // Copyright (C) 2007-2022 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/algo.h * @brief Parallel STL function calls corresponding to the stl_algo.h header. * * 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_ALGO_H #define _GLIBCXX_PARALLEL_ALGO_H 1 #include <parallel/algorithmfwd.h> #include <bits/stl_algobase.h> #include <bits/stl_algo.h> #include <parallel/iterator.h> #include <parallel/base.h> #include <parallel/sort.h> #include <parallel/workstealing.h> #include <parallel/par_loop.h> #include <parallel/omp_loop.h> #include <parallel/omp_loop_static.h> #include <parallel/for_each_selectors.h> #include <parallel/for_each.h> #include <parallel/find.h> #include <parallel/find_selectors.h> #include <parallel/search.h> #include <parallel/random_shuffle.h> #include <parallel/partition.h> #include <parallel/merge.h> #include <parallel/unique_copy.h> #include <parallel/set_operations.h> namespace std _GLIBCXX_VISIBILITY(default) { namespace __parallel { // Sequential fallback template<typename _IIter, typename _Function> inline _Function for_each(_IIter __begin, _IIter __end, _Function __f, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::for_each(__begin, __end, __f); } // Sequential fallback for input iterator case template<typename _IIter, typename _Function, typename _IteratorTag> inline _Function __for_each_switch(_IIter __begin, _IIter __end, _Function __f, _IteratorTag) { return for_each(__begin, __end, __f, __gnu_parallel::sequential_tag()); } // Parallel algorithm for random access iterators template<typename _RAIter, typename _Function> _Function __for_each_switch(_RAIter __begin, _RAIter __end, _Function __f, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().for_each_minimal_n && __gnu_parallel::__is_parallel(__parallelism_tag))) { bool __dummy; __gnu_parallel::__for_each_selector<_RAIter> __functionality; return __gnu_parallel:: __for_each_template_random_access( __begin, __end, __f, __functionality, __gnu_parallel::_DummyReduct(), true, __dummy, -1, __parallelism_tag); } else return for_each(__begin, __end, __f, __gnu_parallel::sequential_tag()); } // Public interface template<typename _Iterator, typename _Function> inline _Function for_each(_Iterator __begin, _Iterator __end, _Function __f, __gnu_parallel::_Parallelism __parallelism_tag) { return __for_each_switch(__begin, __end, __f, std::__iterator_category(__begin), __parallelism_tag); } template<typename _Iterator, typename _Function> inline _Function for_each(_Iterator __begin, _Iterator __end, _Function __f) { return __for_each_switch(__begin, __end, __f, std::__iterator_category(__begin)); } // Sequential fallback template<typename _IIter, typename _Tp> inline _IIter find(_IIter __begin, _IIter __end, const _Tp& __val, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::find(__begin, __end, __val); } // Sequential fallback for input iterator case template<typename _IIter, typename _Tp, typename _IteratorTag> inline _IIter __find_switch(_IIter __begin, _IIter __end, const _Tp& __val, _IteratorTag) { return _GLIBCXX_STD_A::find(__begin, __end, __val); } // Parallel find for random access iterators template<typename _RAIter, typename _Tp> _RAIter __find_switch(_RAIter __begin, _RAIter __end, const _Tp& __val, random_access_iterator_tag) { typedef iterator_traits<_RAIter> _TraitsType; typedef typename _TraitsType::value_type _ValueType; if (_GLIBCXX_PARALLEL_CONDITION(true)) { __gnu_parallel::__binder2nd<__gnu_parallel::_EqualTo<_ValueType, const _Tp&>, _ValueType, const _Tp&, bool> __comp(__gnu_parallel::_EqualTo<_ValueType, const _Tp&>(), __val); return __gnu_parallel::__find_template( __begin, __end, __begin, __comp, __gnu_parallel::__find_if_selector()).first; } else return _GLIBCXX_STD_A::find(__begin, __end, __val); } // Public interface template<typename _IIter, typename _Tp> inline _IIter find(_IIter __begin, _IIter __end, const _Tp& __val) { return __find_switch(__begin, __end, __val, std::__iterator_category(__begin)); } // Sequential fallback template<typename _IIter, typename _Predicate> inline _IIter find_if(_IIter __begin, _IIter __end, _Predicate __pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::find_if(__begin, __end, __pred); } // Sequential fallback for input iterator case template<typename _IIter, typename _Predicate, typename _IteratorTag> inline _IIter __find_if_switch(_IIter __begin, _IIter __end, _Predicate __pred, _IteratorTag) { return _GLIBCXX_STD_A::find_if(__begin, __end, __pred); } // Parallel find_if for random access iterators template<typename _RAIter, typename _Predicate> _RAIter __find_if_switch(_RAIter __begin, _RAIter __end, _Predicate __pred, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION(true)) return __gnu_parallel::__find_template(__begin, __end, __begin, __pred, __gnu_parallel:: __find_if_selector()).first; else return _GLIBCXX_STD_A::find_if(__begin, __end, __pred); } // Public interface template<typename _IIter, typename _Predicate> inline _IIter find_if(_IIter __begin, _IIter __end, _Predicate __pred) { return __find_if_switch(__begin, __end, __pred, std::__iterator_category(__begin)); } // Sequential fallback template<typename _IIter, typename _FIterator> inline _IIter find_first_of(_IIter __begin1, _IIter __end1, _FIterator __begin2, _FIterator __end2, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::find_first_of(__begin1, __end1, __begin2, __end2); } // Sequential fallback template<typename _IIter, typename _FIterator, typename _BinaryPredicate> inline _IIter find_first_of(_IIter __begin1, _IIter __end1, _FIterator __begin2, _FIterator __end2, _BinaryPredicate __comp, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::find_first_of( __begin1, __end1, __begin2, __end2, __comp); } // Sequential fallback for input iterator type template<typename _IIter, typename _FIterator, typename _IteratorTag1, typename _IteratorTag2> inline _IIter __find_first_of_switch(_IIter __begin1, _IIter __end1, _FIterator __begin2, _FIterator __end2, _IteratorTag1, _IteratorTag2) { return find_first_of(__begin1, __end1, __begin2, __end2, __gnu_parallel::sequential_tag()); } // Parallel algorithm for random access iterators template<typename _RAIter, typename _FIterator, typename _BinaryPredicate, typename _IteratorTag> inline _RAIter __find_first_of_switch(_RAIter __begin1, _RAIter __end1, _FIterator __begin2, _FIterator __end2, _BinaryPredicate __comp, random_access_iterator_tag, _IteratorTag) { return __gnu_parallel:: __find_template(__begin1, __end1, __begin1, __comp, __gnu_parallel::__find_first_of_selector <_FIterator>(__begin2, __end2)).first; } // Sequential fallback for input iterator type template<typename _IIter, typename _FIterator, typename _BinaryPredicate, typename _IteratorTag1, typename _IteratorTag2> inline _IIter __find_first_of_switch(_IIter __begin1, _IIter __end1, _FIterator __begin2, _FIterator __end2, _BinaryPredicate __comp, _IteratorTag1, _IteratorTag2) { return find_first_of(__begin1, __end1, __begin2, __end2, __comp, __gnu_parallel::sequential_tag()); } // Public interface template<typename _IIter, typename _FIterator, typename _BinaryPredicate> inline _IIter find_first_of(_IIter __begin1, _IIter __end1, _FIterator __begin2, _FIterator __end2, _BinaryPredicate __comp) { return __find_first_of_switch(__begin1, __end1, __begin2, __end2, __comp, std::__iterator_category(__begin1), std::__iterator_category(__begin2)); } // Public interface, insert default comparator template<typename _IIter, typename _FIterator> inline _IIter find_first_of(_IIter __begin1, _IIter __end1, _FIterator __begin2, _FIterator __end2) { typedef typename std::iterator_traits<_IIter>::value_type _IValueType; typedef typename std::iterator_traits<_FIterator>::value_type _FValueType; return __gnu_parallel::find_first_of(__begin1, __end1, __begin2, __end2, __gnu_parallel::_EqualTo<_IValueType, _FValueType>()); } // Sequential fallback template<typename _IIter, typename _OutputIterator> inline _OutputIterator unique_copy(_IIter __begin1, _IIter __end1, _OutputIterator __out, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::unique_copy(__begin1, __end1, __out); } // Sequential fallback template<typename _IIter, typename _OutputIterator, typename _Predicate> inline _OutputIterator unique_copy(_IIter __begin1, _IIter __end1, _OutputIterator __out, _Predicate __pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::unique_copy(__begin1, __end1, __out, __pred); } // Sequential fallback for input iterator case template<typename _IIter, typename _OutputIterator, typename _Predicate, typename _IteratorTag1, typename _IteratorTag2> inline _OutputIterator __unique_copy_switch(_IIter __begin, _IIter __last, _OutputIterator __out, _Predicate __pred, _IteratorTag1, _IteratorTag2) { return _GLIBCXX_STD_A::unique_copy(__begin, __last, __out, __pred); } // Parallel unique_copy for random access iterators template<typename _RAIter, typename _RandomAccessOutputIterator, typename _Predicate> _RandomAccessOutputIterator __unique_copy_switch(_RAIter __begin, _RAIter __last, _RandomAccessOutputIterator __out, _Predicate __pred, random_access_iterator_tag, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__last - __begin) > __gnu_parallel::_Settings::get().unique_copy_minimal_n)) return __gnu_parallel::__parallel_unique_copy( __begin, __last, __out, __pred); else return _GLIBCXX_STD_A::unique_copy(__begin, __last, __out, __pred); } // Public interface template<typename _IIter, typename _OutputIterator> inline _OutputIterator unique_copy(_IIter __begin1, _IIter __end1, _OutputIterator __out) { typedef typename std::iterator_traits<_IIter>::value_type _ValueType; return __unique_copy_switch( __begin1, __end1, __out, equal_to<_ValueType>(), std::__iterator_category(__begin1), std::__iterator_category(__out)); } // Public interface template<typename _IIter, typename _OutputIterator, typename _Predicate> inline _OutputIterator unique_copy(_IIter __begin1, _IIter __end1, _OutputIterator __out, _Predicate __pred) { return __unique_copy_switch( __begin1, __end1, __out, __pred, std::__iterator_category(__begin1), std::__iterator_category(__out)); } // Sequential fallback template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator set_union(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::set_union( __begin1, __end1, __begin2, __end2, __out); } // Sequential fallback template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Predicate> inline _OutputIterator set_union(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, _Predicate __pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::set_union(__begin1, __end1, __begin2, __end2, __out, __pred); } // Sequential fallback for input iterator case template<typename _IIter1, typename _IIter2, typename _Predicate, typename _OutputIterator, typename _IteratorTag1, typename _IteratorTag2, typename _IteratorTag3> inline _OutputIterator __set_union_switch( _IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result, _Predicate __pred, _IteratorTag1, _IteratorTag2, _IteratorTag3) { return _GLIBCXX_STD_A::set_union(__begin1, __end1, __begin2, __end2, __result, __pred); } // Parallel set_union for random access iterators template<typename _RAIter1, typename _RAIter2, typename _Output_RAIter, typename _Predicate> _Output_RAIter __set_union_switch(_RAIter1 __begin1, _RAIter1 __end1, _RAIter2 __begin2, _RAIter2 __end2, _Output_RAIter __result, _Predicate __pred, random_access_iterator_tag, random_access_iterator_tag, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end1 - __begin1) >= __gnu_parallel::_Settings::get().set_union_minimal_n || static_cast<__gnu_parallel::_SequenceIndex>(__end2 - __begin2) >= __gnu_parallel::_Settings::get().set_union_minimal_n)) return __gnu_parallel::__parallel_set_union( __begin1, __end1, __begin2, __end2, __result, __pred); else return _GLIBCXX_STD_A::set_union(__begin1, __end1, __begin2, __end2, __result, __pred); } // Public interface template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator set_union(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out) { typedef typename std::iterator_traits<_IIter1>::value_type _ValueType1; typedef typename std::iterator_traits<_IIter2>::value_type _ValueType2; return __set_union_switch( __begin1, __end1, __begin2, __end2, __out, __gnu_parallel::_Less<_ValueType1, _ValueType2>(), std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__out)); } // Public interface template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Predicate> inline _OutputIterator set_union(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, _Predicate __pred) { return __set_union_switch( __begin1, __end1, __begin2, __end2, __out, __pred, std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__out)); } // Sequential fallback. template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator set_intersection(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::set_intersection(__begin1, __end1, __begin2, __end2, __out); } // Sequential fallback. template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Predicate> inline _OutputIterator set_intersection(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, _Predicate __pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::set_intersection( __begin1, __end1, __begin2, __end2, __out, __pred); } // Sequential fallback for input iterator case template<typename _IIter1, typename _IIter2, typename _Predicate, typename _OutputIterator, typename _IteratorTag1, typename _IteratorTag2, typename _IteratorTag3> inline _OutputIterator __set_intersection_switch(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result, _Predicate __pred, _IteratorTag1, _IteratorTag2, _IteratorTag3) { return _GLIBCXX_STD_A::set_intersection(__begin1, __end1, __begin2, __end2, __result, __pred); } // Parallel set_intersection for random access iterators template<typename _RAIter1, typename _RAIter2, typename _Output_RAIter, typename _Predicate> _Output_RAIter __set_intersection_switch(_RAIter1 __begin1, _RAIter1 __end1, _RAIter2 __begin2, _RAIter2 __end2, _Output_RAIter __result, _Predicate __pred, random_access_iterator_tag, random_access_iterator_tag, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end1 - __begin1) >= __gnu_parallel::_Settings::get().set_union_minimal_n || static_cast<__gnu_parallel::_SequenceIndex>(__end2 - __begin2) >= __gnu_parallel::_Settings::get().set_union_minimal_n)) return __gnu_parallel::__parallel_set_intersection( __begin1, __end1, __begin2, __end2, __result, __pred); else return _GLIBCXX_STD_A::set_intersection( __begin1, __end1, __begin2, __end2, __result, __pred); } // Public interface template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator set_intersection(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out) { typedef typename std::iterator_traits<_IIter1>::value_type _ValueType1; typedef typename std::iterator_traits<_IIter2>::value_type _ValueType2; return __set_intersection_switch( __begin1, __end1, __begin2, __end2, __out, __gnu_parallel::_Less<_ValueType1, _ValueType2>(), std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__out)); } template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Predicate> inline _OutputIterator set_intersection(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, _Predicate __pred) { return __set_intersection_switch( __begin1, __end1, __begin2, __end2, __out, __pred, std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__out)); } // Sequential fallback template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator set_symmetric_difference(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::set_symmetric_difference( __begin1, __end1, __begin2, __end2, __out); } // Sequential fallback template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Predicate> inline _OutputIterator set_symmetric_difference(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, _Predicate __pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::set_symmetric_difference( __begin1, __end1, __begin2, __end2, __out, __pred); } // Sequential fallback for input iterator case template<typename _IIter1, typename _IIter2, typename _Predicate, typename _OutputIterator, typename _IteratorTag1, typename _IteratorTag2, typename _IteratorTag3> inline _OutputIterator __set_symmetric_difference_switch( _IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result, _Predicate __pred, _IteratorTag1, _IteratorTag2, _IteratorTag3) { return _GLIBCXX_STD_A::set_symmetric_difference( __begin1, __end1, __begin2, __end2, __result, __pred); } // Parallel set_symmetric_difference for random access iterators template<typename _RAIter1, typename _RAIter2, typename _Output_RAIter, typename _Predicate> _Output_RAIter __set_symmetric_difference_switch(_RAIter1 __begin1, _RAIter1 __end1, _RAIter2 __begin2, _RAIter2 __end2, _Output_RAIter __result, _Predicate __pred, random_access_iterator_tag, random_access_iterator_tag, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end1 - __begin1) >= __gnu_parallel::_Settings::get().set_symmetric_difference_minimal_n || static_cast<__gnu_parallel::_SequenceIndex>(__end2 - __begin2) >= __gnu_parallel::_Settings::get().set_symmetric_difference_minimal_n)) return __gnu_parallel::__parallel_set_symmetric_difference( __begin1, __end1, __begin2, __end2, __result, __pred); else return _GLIBCXX_STD_A::set_symmetric_difference( __begin1, __end1, __begin2, __end2, __result, __pred); } // Public interface. template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator set_symmetric_difference(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out) { typedef typename std::iterator_traits<_IIter1>::value_type _ValueType1; typedef typename std::iterator_traits<_IIter2>::value_type _ValueType2; return __set_symmetric_difference_switch( __begin1, __end1, __begin2, __end2, __out, __gnu_parallel::_Less<_ValueType1, _ValueType2>(), std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__out)); } // Public interface. template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Predicate> inline _OutputIterator set_symmetric_difference(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, _Predicate __pred) { return __set_symmetric_difference_switch( __begin1, __end1, __begin2, __end2, __out, __pred, std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__out)); } // Sequential fallback. template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator set_difference(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::set_difference( __begin1,__end1, __begin2, __end2, __out); } // Sequential fallback. template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Predicate> inline _OutputIterator set_difference(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, _Predicate __pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::set_difference(__begin1, __end1, __begin2, __end2, __out, __pred); } // Sequential fallback for input iterator case. template<typename _IIter1, typename _IIter2, typename _Predicate, typename _OutputIterator, typename _IteratorTag1, typename _IteratorTag2, typename _IteratorTag3> inline _OutputIterator __set_difference_switch(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result, _Predicate __pred, _IteratorTag1, _IteratorTag2, _IteratorTag3) { return _GLIBCXX_STD_A::set_difference( __begin1, __end1, __begin2, __end2, __result, __pred); } // Parallel set_difference for random access iterators template<typename _RAIter1, typename _RAIter2, typename _Output_RAIter, typename _Predicate> _Output_RAIter __set_difference_switch(_RAIter1 __begin1, _RAIter1 __end1, _RAIter2 __begin2, _RAIter2 __end2, _Output_RAIter __result, _Predicate __pred, random_access_iterator_tag, random_access_iterator_tag, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end1 - __begin1) >= __gnu_parallel::_Settings::get().set_difference_minimal_n || static_cast<__gnu_parallel::_SequenceIndex>(__end2 - __begin2) >= __gnu_parallel::_Settings::get().set_difference_minimal_n)) return __gnu_parallel::__parallel_set_difference( __begin1, __end1, __begin2, __end2, __result, __pred); else return _GLIBCXX_STD_A::set_difference( __begin1, __end1, __begin2, __end2, __result, __pred); } // Public interface template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator set_difference(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out) { typedef typename std::iterator_traits<_IIter1>::value_type _ValueType1; typedef typename std::iterator_traits<_IIter2>::value_type _ValueType2; return __set_difference_switch( __begin1, __end1, __begin2, __end2, __out, __gnu_parallel::_Less<_ValueType1, _ValueType2>(), std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__out)); } // Public interface template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Predicate> inline _OutputIterator set_difference(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __out, _Predicate __pred) { return __set_difference_switch( __begin1, __end1, __begin2, __end2, __out, __pred, std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__out)); } // Sequential fallback template<typename _FIterator> inline _FIterator adjacent_find(_FIterator __begin, _FIterator __end, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::adjacent_find(__begin, __end); } // Sequential fallback template<typename _FIterator, typename _BinaryPredicate> inline _FIterator adjacent_find(_FIterator __begin, _FIterator __end, _BinaryPredicate __binary_pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::adjacent_find(__begin, __end, __binary_pred); } // Parallel algorithm for random access iterators template<typename _RAIter> _RAIter __adjacent_find_switch(_RAIter __begin, _RAIter __end, random_access_iterator_tag) { typedef iterator_traits<_RAIter> _TraitsType; typedef typename _TraitsType::value_type _ValueType; if (_GLIBCXX_PARALLEL_CONDITION(true)) { _RAIter __spot = __gnu_parallel:: __find_template( __begin, __end - 1, __begin, equal_to<_ValueType>(), __gnu_parallel::__adjacent_find_selector()) .first; if (__spot == (__end - 1)) return __end; else return __spot; } else return adjacent_find(__begin, __end, __gnu_parallel::sequential_tag()); } // Sequential fallback for input iterator case template<typename _FIterator, typename _IteratorTag> inline _FIterator __adjacent_find_switch(_FIterator __begin, _FIterator __end, _IteratorTag) { return adjacent_find(__begin, __end, __gnu_parallel::sequential_tag()); } // Public interface template<typename _FIterator> inline _FIterator adjacent_find(_FIterator __begin, _FIterator __end) { return __adjacent_find_switch(__begin, __end, std::__iterator_category(__begin)); } // Sequential fallback for input iterator case template<typename _FIterator, typename _BinaryPredicate, typename _IteratorTag> inline _FIterator __adjacent_find_switch(_FIterator __begin, _FIterator __end, _BinaryPredicate __pred, _IteratorTag) { return adjacent_find(__begin, __end, __pred, __gnu_parallel::sequential_tag()); } // Parallel algorithm for random access iterators template<typename _RAIter, typename _BinaryPredicate> _RAIter __adjacent_find_switch(_RAIter __begin, _RAIter __end, _BinaryPredicate __pred, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION(true)) return __gnu_parallel::__find_template(__begin, __end, __begin, __pred, __gnu_parallel:: __adjacent_find_selector()).first; else return adjacent_find(__begin, __end, __pred, __gnu_parallel::sequential_tag()); } // Public interface template<typename _FIterator, typename _BinaryPredicate> inline _FIterator adjacent_find(_FIterator __begin, _FIterator __end, _BinaryPredicate __pred) { return __adjacent_find_switch(__begin, __end, __pred, std::__iterator_category(__begin)); } // Sequential fallback template<typename _IIter, typename _Tp> inline typename iterator_traits<_IIter>::difference_type count(_IIter __begin, _IIter __end, const _Tp& __value, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::count(__begin, __end, __value); } // Parallel code for random access iterators template<typename _RAIter, typename _Tp> typename iterator_traits<_RAIter>::difference_type __count_switch(_RAIter __begin, _RAIter __end, const _Tp& __value, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { typedef iterator_traits<_RAIter> _TraitsType; typedef typename _TraitsType::value_type _ValueType; typedef typename _TraitsType::difference_type _DifferenceType; typedef __gnu_parallel::_SequenceIndex _SequenceIndex; if (_GLIBCXX_PARALLEL_CONDITION( static_cast<_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().count_minimal_n && __gnu_parallel::__is_parallel(__parallelism_tag))) { __gnu_parallel::__count_selector<_RAIter, _DifferenceType> __functionality; _DifferenceType __res = 0; __gnu_parallel:: __for_each_template_random_access( __begin, __end, __value, __functionality, std::plus<_SequenceIndex>(), __res, __res, -1, __parallelism_tag); return __res; } else return count(__begin, __end, __value, __gnu_parallel::sequential_tag()); } // Sequential fallback for input iterator case. template<typename _IIter, typename _Tp, typename _IteratorTag> inline typename iterator_traits<_IIter>::difference_type __count_switch(_IIter __begin, _IIter __end, const _Tp& __value, _IteratorTag) { return count(__begin, __end, __value, __gnu_parallel::sequential_tag()); } // Public interface. template<typename _IIter, typename _Tp> inline typename iterator_traits<_IIter>::difference_type count(_IIter __begin, _IIter __end, const _Tp& __value, __gnu_parallel::_Parallelism __parallelism_tag) { return __count_switch(__begin, __end, __value, std::__iterator_category(__begin), __parallelism_tag); } template<typename _IIter, typename _Tp> inline typename iterator_traits<_IIter>::difference_type count(_IIter __begin, _IIter __end, const _Tp& __value) { return __count_switch(__begin, __end, __value, std::__iterator_category(__begin)); } // Sequential fallback. template<typename _IIter, typename _Predicate> inline typename iterator_traits<_IIter>::difference_type count_if(_IIter __begin, _IIter __end, _Predicate __pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::count_if(__begin, __end, __pred); } // Parallel count_if for random access iterators template<typename _RAIter, typename _Predicate> typename iterator_traits<_RAIter>::difference_type __count_if_switch(_RAIter __begin, _RAIter __end, _Predicate __pred, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { typedef iterator_traits<_RAIter> _TraitsType; typedef typename _TraitsType::value_type _ValueType; typedef typename _TraitsType::difference_type _DifferenceType; typedef __gnu_parallel::_SequenceIndex _SequenceIndex; if (_GLIBCXX_PARALLEL_CONDITION( static_cast<_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().count_minimal_n && __gnu_parallel::__is_parallel(__parallelism_tag))) { _DifferenceType __res = 0; __gnu_parallel:: __count_if_selector<_RAIter, _DifferenceType> __functionality; __gnu_parallel:: __for_each_template_random_access( __begin, __end, __pred, __functionality, std::plus<_SequenceIndex>(), __res, __res, -1, __parallelism_tag); return __res; } else return count_if(__begin, __end, __pred, __gnu_parallel::sequential_tag()); } // Sequential fallback for input iterator case. template<typename _IIter, typename _Predicate, typename _IteratorTag> inline typename iterator_traits<_IIter>::difference_type __count_if_switch(_IIter __begin, _IIter __end, _Predicate __pred, _IteratorTag) { return count_if(__begin, __end, __pred, __gnu_parallel::sequential_tag()); } // Public interface. template<typename _IIter, typename _Predicate> inline typename iterator_traits<_IIter>::difference_type count_if(_IIter __begin, _IIter __end, _Predicate __pred, __gnu_parallel::_Parallelism __parallelism_tag) { return __count_if_switch(__begin, __end, __pred, std::__iterator_category(__begin), __parallelism_tag); } template<typename _IIter, typename _Predicate> inline typename iterator_traits<_IIter>::difference_type count_if(_IIter __begin, _IIter __end, _Predicate __pred) { return __count_if_switch(__begin, __end, __pred, std::__iterator_category(__begin)); } // Sequential fallback. template<typename _FIterator1, typename _FIterator2> inline _FIterator1 search(_FIterator1 __begin1, _FIterator1 __end1, _FIterator2 __begin2, _FIterator2 __end2, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::search(__begin1, __end1, __begin2, __end2); } // Parallel algorithm for random access iterator template<typename _RAIter1, typename _RAIter2> _RAIter1 __search_switch(_RAIter1 __begin1, _RAIter1 __end1, _RAIter2 __begin2, _RAIter2 __end2, random_access_iterator_tag, random_access_iterator_tag) { typedef typename std::iterator_traits<_RAIter1>::value_type _ValueType1; typedef typename std::iterator_traits<_RAIter2>::value_type _ValueType2; if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end1 - __begin1) >= __gnu_parallel::_Settings::get().search_minimal_n)) return __gnu_parallel:: __search_template( __begin1, __end1, __begin2, __end2, __gnu_parallel::_EqualTo<_ValueType1, _ValueType2>()); else return search(__begin1, __end1, __begin2, __end2, __gnu_parallel::sequential_tag()); } // Sequential fallback for input iterator case template<typename _FIterator1, typename _FIterator2, typename _IteratorTag1, typename _IteratorTag2> inline _FIterator1 __search_switch(_FIterator1 __begin1, _FIterator1 __end1, _FIterator2 __begin2, _FIterator2 __end2, _IteratorTag1, _IteratorTag2) { return search(__begin1, __end1, __begin2, __end2, __gnu_parallel::sequential_tag()); } // Public interface. template<typename _FIterator1, typename _FIterator2> inline _FIterator1 search(_FIterator1 __begin1, _FIterator1 __end1, _FIterator2 __begin2, _FIterator2 __end2) { return __search_switch(__begin1, __end1, __begin2, __end2, std::__iterator_category(__begin1), std::__iterator_category(__begin2)); } // Public interface. template<typename _FIterator1, typename _FIterator2, typename _BinaryPredicate> inline _FIterator1 search(_FIterator1 __begin1, _FIterator1 __end1, _FIterator2 __begin2, _FIterator2 __end2, _BinaryPredicate __pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::search( __begin1, __end1, __begin2, __end2, __pred); } // Parallel algorithm for random access iterator. template<typename _RAIter1, typename _RAIter2, typename _BinaryPredicate> _RAIter1 __search_switch(_RAIter1 __begin1, _RAIter1 __end1, _RAIter2 __begin2, _RAIter2 __end2, _BinaryPredicate __pred, random_access_iterator_tag, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end1 - __begin1) >= __gnu_parallel::_Settings::get().search_minimal_n)) return __gnu_parallel::__search_template(__begin1, __end1, __begin2, __end2, __pred); else return search(__begin1, __end1, __begin2, __end2, __pred, __gnu_parallel::sequential_tag()); } // Sequential fallback for input iterator case template<typename _FIterator1, typename _FIterator2, typename _BinaryPredicate, typename _IteratorTag1, typename _IteratorTag2> inline _FIterator1 __search_switch(_FIterator1 __begin1, _FIterator1 __end1, _FIterator2 __begin2, _FIterator2 __end2, _BinaryPredicate __pred, _IteratorTag1, _IteratorTag2) { return search(__begin1, __end1, __begin2, __end2, __pred, __gnu_parallel::sequential_tag()); } // Public interface template<typename _FIterator1, typename _FIterator2, typename _BinaryPredicate> inline _FIterator1 search(_FIterator1 __begin1, _FIterator1 __end1, _FIterator2 __begin2, _FIterator2 __end2, _BinaryPredicate __pred) { return __search_switch(__begin1, __end1, __begin2, __end2, __pred, std::__iterator_category(__begin1), std::__iterator_category(__begin2)); } #if __cplusplus >= 201703L /** @brief Search a sequence using a Searcher object. * * @param __first A forward iterator. * @param __last A forward iterator. * @param __searcher A callable object. * @return @p __searcher(__first,__last).first */ template<typename _ForwardIterator, typename _Searcher> inline _ForwardIterator search(_ForwardIterator __first, _ForwardIterator __last, const _Searcher& __searcher) { return __searcher(__first, __last).first; } #endif // Sequential fallback template<typename _FIterator, typename _Integer, typename _Tp> inline _FIterator search_n(_FIterator __begin, _FIterator __end, _Integer __count, const _Tp& __val, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::search_n(__begin, __end, __count, __val); } // Sequential fallback template<typename _FIterator, typename _Integer, typename _Tp, typename _BinaryPredicate> inline _FIterator search_n(_FIterator __begin, _FIterator __end, _Integer __count, const _Tp& __val, _BinaryPredicate __binary_pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::search_n( __begin, __end, __count, __val, __binary_pred); } // Public interface. template<typename _FIterator, typename _Integer, typename _Tp> inline _FIterator search_n(_FIterator __begin, _FIterator __end, _Integer __count, const _Tp& __val) { typedef typename iterator_traits<_FIterator>::value_type _ValueType; return __gnu_parallel::search_n(__begin, __end, __count, __val, __gnu_parallel::_EqualTo<_ValueType, _Tp>()); } // Parallel algorithm for random access iterators. template<typename _RAIter, typename _Integer, typename _Tp, typename _BinaryPredicate> _RAIter __search_n_switch(_RAIter __begin, _RAIter __end, _Integer __count, const _Tp& __val, _BinaryPredicate __binary_pred, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().search_minimal_n)) { __gnu_parallel::_PseudoSequence<_Tp, _Integer> __ps(__val, __count); return __gnu_parallel::__search_template( __begin, __end, __ps.begin(), __ps.end(), __binary_pred); } else return _GLIBCXX_STD_A::search_n(__begin, __end, __count, __val, __binary_pred); } // Sequential fallback for input iterator case. template<typename _FIterator, typename _Integer, typename _Tp, typename _BinaryPredicate, typename _IteratorTag> inline _FIterator __search_n_switch(_FIterator __begin, _FIterator __end, _Integer __count, const _Tp& __val, _BinaryPredicate __binary_pred, _IteratorTag) { return _GLIBCXX_STD_A::search_n(__begin, __end, __count, __val, __binary_pred); } // Public interface. template<typename _FIterator, typename _Integer, typename _Tp, typename _BinaryPredicate> inline _FIterator search_n(_FIterator __begin, _FIterator __end, _Integer __count, const _Tp& __val, _BinaryPredicate __binary_pred) { return __search_n_switch(__begin, __end, __count, __val, __binary_pred, std::__iterator_category(__begin)); } // Sequential fallback. template<typename _IIter, typename _OutputIterator, typename _UnaryOperation> inline _OutputIterator transform(_IIter __begin, _IIter __end, _OutputIterator __result, _UnaryOperation __unary_op, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::transform(__begin, __end, __result, __unary_op); } // Parallel unary transform for random access iterators. template<typename _RAIter1, typename _RAIter2, typename _UnaryOperation> _RAIter2 __transform1_switch(_RAIter1 __begin, _RAIter1 __end, _RAIter2 __result, _UnaryOperation __unary_op, random_access_iterator_tag, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().transform_minimal_n && __gnu_parallel::__is_parallel(__parallelism_tag))) { bool __dummy = true; typedef __gnu_parallel::_IteratorPair<_RAIter1, _RAIter2, random_access_iterator_tag> _ItTrip; _ItTrip __begin_pair(__begin, __result), __end_pair(__end, __result + (__end - __begin)); __gnu_parallel::__transform1_selector<_ItTrip> __functionality; __gnu_parallel:: __for_each_template_random_access( __begin_pair, __end_pair, __unary_op, __functionality, __gnu_parallel::_DummyReduct(), __dummy, __dummy, -1, __parallelism_tag); return __functionality._M_finish_iterator; } else return transform(__begin, __end, __result, __unary_op, __gnu_parallel::sequential_tag()); } // Sequential fallback for input iterator case. template<typename _RAIter1, typename _RAIter2, typename _UnaryOperation, typename _IteratorTag1, typename _IteratorTag2> inline _RAIter2 __transform1_switch(_RAIter1 __begin, _RAIter1 __end, _RAIter2 __result, _UnaryOperation __unary_op, _IteratorTag1, _IteratorTag2) { return transform(__begin, __end, __result, __unary_op, __gnu_parallel::sequential_tag()); } // Public interface. template<typename _IIter, typename _OutputIterator, typename _UnaryOperation> inline _OutputIterator transform(_IIter __begin, _IIter __end, _OutputIterator __result, _UnaryOperation __unary_op, __gnu_parallel::_Parallelism __parallelism_tag) { return __transform1_switch(__begin, __end, __result, __unary_op, std::__iterator_category(__begin), std::__iterator_category(__result), __parallelism_tag); } template<typename _IIter, typename _OutputIterator, typename _UnaryOperation> inline _OutputIterator transform(_IIter __begin, _IIter __end, _OutputIterator __result, _UnaryOperation __unary_op) { return __transform1_switch(__begin, __end, __result, __unary_op, std::__iterator_category(__begin), std::__iterator_category(__result)); } // Sequential fallback template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _BinaryOperation> inline _OutputIterator transform(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _OutputIterator __result, _BinaryOperation __binary_op, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::transform(__begin1, __end1, __begin2, __result, __binary_op); } // Parallel binary transform for random access iterators. template<typename _RAIter1, typename _RAIter2, typename _RAIter3, typename _BinaryOperation> _RAIter3 __transform2_switch(_RAIter1 __begin1, _RAIter1 __end1, _RAIter2 __begin2, _RAIter3 __result, _BinaryOperation __binary_op, random_access_iterator_tag, random_access_iterator_tag, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { if (_GLIBCXX_PARALLEL_CONDITION( (__end1 - __begin1) >= __gnu_parallel::_Settings::get().transform_minimal_n && __gnu_parallel::__is_parallel(__parallelism_tag))) { bool __dummy = true; typedef __gnu_parallel::_IteratorTriple<_RAIter1, _RAIter2, _RAIter3, random_access_iterator_tag> _ItTrip; _ItTrip __begin_triple(__begin1, __begin2, __result), __end_triple(__end1, __begin2 + (__end1 - __begin1), __result + (__end1 - __begin1)); __gnu_parallel::__transform2_selector<_ItTrip> __functionality; __gnu_parallel:: __for_each_template_random_access(__begin_triple, __end_triple, __binary_op, __functionality, __gnu_parallel::_DummyReduct(), __dummy, __dummy, -1, __parallelism_tag); return __functionality._M_finish_iterator; } else return transform(__begin1, __end1, __begin2, __result, __binary_op, __gnu_parallel::sequential_tag()); } // Sequential fallback for input iterator case. template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _BinaryOperation, typename _Tag1, typename _Tag2, typename _Tag3> inline _OutputIterator __transform2_switch(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _OutputIterator __result, _BinaryOperation __binary_op, _Tag1, _Tag2, _Tag3) { return transform(__begin1, __end1, __begin2, __result, __binary_op, __gnu_parallel::sequential_tag()); } // Public interface. template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _BinaryOperation> inline _OutputIterator transform(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _OutputIterator __result, _BinaryOperation __binary_op, __gnu_parallel::_Parallelism __parallelism_tag) { return __transform2_switch( __begin1, __end1, __begin2, __result, __binary_op, std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__result), __parallelism_tag); } template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _BinaryOperation> inline _OutputIterator transform(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _OutputIterator __result, _BinaryOperation __binary_op) { return __transform2_switch( __begin1, __end1, __begin2, __result, __binary_op, std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__result)); } // Sequential fallback template<typename _FIterator, typename _Tp> inline void replace(_FIterator __begin, _FIterator __end, const _Tp& __old_value, const _Tp& __new_value, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::replace(__begin, __end, __old_value, __new_value); } // Sequential fallback for input iterator case template<typename _FIterator, typename _Tp, typename _IteratorTag> inline void __replace_switch(_FIterator __begin, _FIterator __end, const _Tp& __old_value, const _Tp& __new_value, _IteratorTag) { replace(__begin, __end, __old_value, __new_value, __gnu_parallel::sequential_tag()); } // Parallel replace for random access iterators template<typename _RAIter, typename _Tp> inline void __replace_switch(_RAIter __begin, _RAIter __end, const _Tp& __old_value, const _Tp& __new_value, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { // XXX parallel version is where? replace(__begin, __end, __old_value, __new_value, __gnu_parallel::sequential_tag()); } // Public interface template<typename _FIterator, typename _Tp> inline void replace(_FIterator __begin, _FIterator __end, const _Tp& __old_value, const _Tp& __new_value, __gnu_parallel::_Parallelism __parallelism_tag) { __replace_switch(__begin, __end, __old_value, __new_value, std::__iterator_category(__begin), __parallelism_tag); } template<typename _FIterator, typename _Tp> inline void replace(_FIterator __begin, _FIterator __end, const _Tp& __old_value, const _Tp& __new_value) { __replace_switch(__begin, __end, __old_value, __new_value, std::__iterator_category(__begin)); } // Sequential fallback template<typename _FIterator, typename _Predicate, typename _Tp> inline void replace_if(_FIterator __begin, _FIterator __end, _Predicate __pred, const _Tp& __new_value, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::replace_if(__begin, __end, __pred, __new_value); } // Sequential fallback for input iterator case template<typename _FIterator, typename _Predicate, typename _Tp, typename _IteratorTag> inline void __replace_if_switch(_FIterator __begin, _FIterator __end, _Predicate __pred, const _Tp& __new_value, _IteratorTag) { replace_if(__begin, __end, __pred, __new_value, __gnu_parallel::sequential_tag()); } // Parallel algorithm for random access iterators. template<typename _RAIter, typename _Predicate, typename _Tp> void __replace_if_switch(_RAIter __begin, _RAIter __end, _Predicate __pred, const _Tp& __new_value, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().replace_minimal_n && __gnu_parallel::__is_parallel(__parallelism_tag))) { bool __dummy; __gnu_parallel:: __replace_if_selector<_RAIter, _Predicate, _Tp> __functionality(__new_value); __gnu_parallel:: __for_each_template_random_access( __begin, __end, __pred, __functionality, __gnu_parallel::_DummyReduct(), true, __dummy, -1, __parallelism_tag); } else replace_if(__begin, __end, __pred, __new_value, __gnu_parallel::sequential_tag()); } // Public interface. template<typename _FIterator, typename _Predicate, typename _Tp> inline void replace_if(_FIterator __begin, _FIterator __end, _Predicate __pred, const _Tp& __new_value, __gnu_parallel::_Parallelism __parallelism_tag) { __replace_if_switch(__begin, __end, __pred, __new_value, std::__iterator_category(__begin), __parallelism_tag); } template<typename _FIterator, typename _Predicate, typename _Tp> inline void replace_if(_FIterator __begin, _FIterator __end, _Predicate __pred, const _Tp& __new_value) { __replace_if_switch(__begin, __end, __pred, __new_value, std::__iterator_category(__begin)); } // Sequential fallback template<typename _FIterator, typename _Generator> inline void generate(_FIterator __begin, _FIterator __end, _Generator __gen, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::generate(__begin, __end, __gen); } // Sequential fallback for input iterator case. template<typename _FIterator, typename _Generator, typename _IteratorTag> inline void __generate_switch(_FIterator __begin, _FIterator __end, _Generator __gen, _IteratorTag) { generate(__begin, __end, __gen, __gnu_parallel::sequential_tag()); } // Parallel algorithm for random access iterators. template<typename _RAIter, typename _Generator> void __generate_switch(_RAIter __begin, _RAIter __end, _Generator __gen, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().generate_minimal_n && __gnu_parallel::__is_parallel(__parallelism_tag))) { bool __dummy; __gnu_parallel::__generate_selector<_RAIter> __functionality; __gnu_parallel:: __for_each_template_random_access( __begin, __end, __gen, __functionality, __gnu_parallel::_DummyReduct(), true, __dummy, -1, __parallelism_tag); } else generate(__begin, __end, __gen, __gnu_parallel::sequential_tag()); } // Public interface. template<typename _FIterator, typename _Generator> inline void generate(_FIterator __begin, _FIterator __end, _Generator __gen, __gnu_parallel::_Parallelism __parallelism_tag) { __generate_switch(__begin, __end, __gen, std::__iterator_category(__begin), __parallelism_tag); } template<typename _FIterator, typename _Generator> inline void generate(_FIterator __begin, _FIterator __end, _Generator __gen) { __generate_switch(__begin, __end, __gen, std::__iterator_category(__begin)); } // Sequential fallback. template<typename _OutputIterator, typename _Size, typename _Generator> inline _OutputIterator generate_n(_OutputIterator __begin, _Size __n, _Generator __gen, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::generate_n(__begin, __n, __gen); } // Sequential fallback for input iterator case. template<typename _OutputIterator, typename _Size, typename _Generator, typename _IteratorTag> inline _OutputIterator __generate_n_switch(_OutputIterator __begin, _Size __n, _Generator __gen, _IteratorTag) { return generate_n(__begin, __n, __gen, __gnu_parallel::sequential_tag()); } // Parallel algorithm for random access iterators. template<typename _RAIter, typename _Size, typename _Generator> inline _RAIter __generate_n_switch(_RAIter __begin, _Size __n, _Generator __gen, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { // XXX parallel version is where? return generate_n(__begin, __n, __gen, __gnu_parallel::sequential_tag()); } // Public interface. template<typename _OutputIterator, typename _Size, typename _Generator> inline _OutputIterator generate_n(_OutputIterator __begin, _Size __n, _Generator __gen, __gnu_parallel::_Parallelism __parallelism_tag) { return __generate_n_switch(__begin, __n, __gen, std::__iterator_category(__begin), __parallelism_tag); } template<typename _OutputIterator, typename _Size, typename _Generator> inline _OutputIterator generate_n(_OutputIterator __begin, _Size __n, _Generator __gen) { return __generate_n_switch(__begin, __n, __gen, std::__iterator_category(__begin)); } // Sequential fallback. template<typename _RAIter> inline void random_shuffle(_RAIter __begin, _RAIter __end, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::random_shuffle(__begin, __end); } // Sequential fallback. template<typename _RAIter, typename _RandomNumberGenerator> inline void random_shuffle(_RAIter __begin, _RAIter __end, _RandomNumberGenerator& __rand, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::random_shuffle(__begin, __end, __rand); } /** @brief Functor wrapper for std::rand(). */ template<typename _MustBeInt = int> struct _CRandNumber { int operator()(int __limit) { return rand() % __limit; } }; // Fill in random number generator. template<typename _RAIter> inline void random_shuffle(_RAIter __begin, _RAIter __end) { _CRandNumber<> __r; // Parallelization still possible. __gnu_parallel::random_shuffle(__begin, __end, __r); } // Parallel algorithm for random access iterators. template<typename _RAIter, typename _RandomNumberGenerator> void random_shuffle(_RAIter __begin, _RAIter __end, #if __cplusplus >= 201103L _RandomNumberGenerator&& __rand) #else _RandomNumberGenerator& __rand) #endif { if (__begin == __end) return; if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().random_shuffle_minimal_n)) __gnu_parallel::__parallel_random_shuffle(__begin, __end, __rand); else __gnu_parallel::__sequential_random_shuffle(__begin, __end, __rand); } // Sequential fallback. template<typename _FIterator, typename _Predicate> inline _FIterator partition(_FIterator __begin, _FIterator __end, _Predicate __pred, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::partition(__begin, __end, __pred); } // Sequential fallback for input iterator case. template<typename _FIterator, typename _Predicate, typename _IteratorTag> inline _FIterator __partition_switch(_FIterator __begin, _FIterator __end, _Predicate __pred, _IteratorTag) { return partition(__begin, __end, __pred, __gnu_parallel::sequential_tag()); } // Parallel algorithm for random access iterators. template<typename _RAIter, typename _Predicate> _RAIter __partition_switch(_RAIter __begin, _RAIter __end, _Predicate __pred, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().partition_minimal_n)) { typedef typename std::iterator_traits<_RAIter>:: difference_type _DifferenceType; _DifferenceType __middle = __gnu_parallel:: __parallel_partition(__begin, __end, __pred, __gnu_parallel::__get_max_threads()); return __begin + __middle; } else return partition(__begin, __end, __pred, __gnu_parallel::sequential_tag()); } // Public interface. template<typename _FIterator, typename _Predicate> inline _FIterator partition(_FIterator __begin, _FIterator __end, _Predicate __pred) { return __partition_switch(__begin, __end, __pred, std::__iterator_category(__begin)); } // sort interface // Sequential fallback template<typename _RAIter> inline void sort(_RAIter __begin, _RAIter __end, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::sort(__begin, __end); } // Sequential fallback template<typename _RAIter, typename _Compare> inline void sort(_RAIter __begin, _RAIter __end, _Compare __comp, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::sort<_RAIter, _Compare>(__begin, __end, __comp); } // Public interface template<typename _RAIter, typename _Compare, typename _Parallelism> void sort(_RAIter __begin, _RAIter __end, _Compare __comp, _Parallelism __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; if (__begin != __end) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().sort_minimal_n)) __gnu_parallel::__parallel_sort<false>( __begin, __end, __comp, __parallelism); else sort(__begin, __end, __comp, __gnu_parallel::sequential_tag()); } } // Public interface, insert default comparator template<typename _RAIter> inline void sort(_RAIter __begin, _RAIter __end) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; sort(__begin, __end, std::less<_ValueType>(), __gnu_parallel::default_parallel_tag()); } // Public interface, insert default comparator template<typename _RAIter> inline void sort(_RAIter __begin, _RAIter __end, __gnu_parallel::default_parallel_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void sort(_RAIter __begin, _RAIter __end, __gnu_parallel::parallel_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void sort(_RAIter __begin, _RAIter __end, __gnu_parallel::multiway_mergesort_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void sort(_RAIter __begin, _RAIter __end, __gnu_parallel::multiway_mergesort_sampling_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void sort(_RAIter __begin, _RAIter __end, __gnu_parallel::multiway_mergesort_exact_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void sort(_RAIter __begin, _RAIter __end, __gnu_parallel::quicksort_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void sort(_RAIter __begin, _RAIter __end, __gnu_parallel::balanced_quicksort_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface template<typename _RAIter, typename _Compare> void sort(_RAIter __begin, _RAIter __end, _Compare __comp) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; sort(__begin, __end, __comp, __gnu_parallel::default_parallel_tag()); } // stable_sort interface // Sequential fallback template<typename _RAIter> inline void stable_sort(_RAIter __begin, _RAIter __end, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::stable_sort(__begin, __end); } // Sequential fallback template<typename _RAIter, typename _Compare> inline void stable_sort(_RAIter __begin, _RAIter __end, _Compare __comp, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::stable_sort<_RAIter, _Compare>(__begin, __end, __comp); } // Public interface template<typename _RAIter, typename _Compare, typename _Parallelism> void stable_sort(_RAIter __begin, _RAIter __end, _Compare __comp, _Parallelism __parallelism) { typedef iterator_traits<_RAIter> _TraitsType; typedef typename _TraitsType::value_type _ValueType; if (__begin != __end) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().sort_minimal_n)) __gnu_parallel::__parallel_sort<true>(__begin, __end, __comp, __parallelism); else stable_sort(__begin, __end, __comp, __gnu_parallel::sequential_tag()); } } // Public interface, insert default comparator template<typename _RAIter> inline void stable_sort(_RAIter __begin, _RAIter __end) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; stable_sort(__begin, __end, std::less<_ValueType>(), __gnu_parallel::default_parallel_tag()); } // Public interface, insert default comparator template<typename _RAIter> inline void stable_sort(_RAIter __begin, _RAIter __end, __gnu_parallel::default_parallel_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; stable_sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void stable_sort(_RAIter __begin, _RAIter __end, __gnu_parallel::parallel_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; stable_sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void stable_sort(_RAIter __begin, _RAIter __end, __gnu_parallel::multiway_mergesort_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; stable_sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void stable_sort(_RAIter __begin, _RAIter __end, __gnu_parallel::quicksort_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; stable_sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface, insert default comparator template<typename _RAIter> inline void stable_sort(_RAIter __begin, _RAIter __end, __gnu_parallel::balanced_quicksort_tag __parallelism) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; stable_sort(__begin, __end, std::less<_ValueType>(), __parallelism); } // Public interface template<typename _RAIter, typename _Compare> void stable_sort(_RAIter __begin, _RAIter __end, _Compare __comp) { stable_sort( __begin, __end, __comp, __gnu_parallel::default_parallel_tag()); } // Sequential fallback template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator merge(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::merge( __begin1, __end1, __begin2, __end2, __result); } // Sequential fallback template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Compare> inline _OutputIterator merge(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result, _Compare __comp, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::merge( __begin1, __end1, __begin2, __end2, __result, __comp); } // Sequential fallback for input iterator case template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Compare, typename _IteratorTag1, typename _IteratorTag2, typename _IteratorTag3> inline _OutputIterator __merge_switch(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result, _Compare __comp, _IteratorTag1, _IteratorTag2, _IteratorTag3) { return _GLIBCXX_STD_A::merge(__begin1, __end1, __begin2, __end2, __result, __comp); } // Parallel algorithm for random access iterators template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Compare> _OutputIterator __merge_switch(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result, _Compare __comp, random_access_iterator_tag, random_access_iterator_tag, random_access_iterator_tag) { if (_GLIBCXX_PARALLEL_CONDITION( (static_cast<__gnu_parallel::_SequenceIndex>(__end1 - __begin1) >= __gnu_parallel::_Settings::get().merge_minimal_n || static_cast<__gnu_parallel::_SequenceIndex>(__end2 - __begin2) >= __gnu_parallel::_Settings::get().merge_minimal_n))) return __gnu_parallel::__parallel_merge_advance( __begin1, __end1, __begin2, __end2, __result, (__end1 - __begin1) + (__end2 - __begin2), __comp); else return __gnu_parallel::__merge_advance( __begin1, __end1, __begin2, __end2, __result, (__end1 - __begin1) + (__end2 - __begin2), __comp); } // Public interface template<typename _IIter1, typename _IIter2, typename _OutputIterator, typename _Compare> inline _OutputIterator merge(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result, _Compare __comp) { return __merge_switch( __begin1, __end1, __begin2, __end2, __result, __comp, std::__iterator_category(__begin1), std::__iterator_category(__begin2), std::__iterator_category(__result)); } // Public interface, insert default comparator template<typename _IIter1, typename _IIter2, typename _OutputIterator> inline _OutputIterator merge(_IIter1 __begin1, _IIter1 __end1, _IIter2 __begin2, _IIter2 __end2, _OutputIterator __result) { typedef typename std::iterator_traits<_IIter1>::value_type _ValueType1; typedef typename std::iterator_traits<_IIter2>::value_type _ValueType2; return __gnu_parallel::merge(__begin1, __end1, __begin2, __end2, __result, __gnu_parallel::_Less<_ValueType1, _ValueType2>()); } // Sequential fallback template<typename _RAIter> inline void nth_element(_RAIter __begin, _RAIter __nth, _RAIter __end, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::nth_element(__begin, __nth, __end); } // Sequential fallback template<typename _RAIter, typename _Compare> inline void nth_element(_RAIter __begin, _RAIter __nth, _RAIter __end, _Compare __comp, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::nth_element(__begin, __nth, __end, __comp); } // Public interface template<typename _RAIter, typename _Compare> inline void nth_element(_RAIter __begin, _RAIter __nth, _RAIter __end, _Compare __comp) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().nth_element_minimal_n)) __gnu_parallel::__parallel_nth_element(__begin, __nth, __end, __comp); else nth_element(__begin, __nth, __end, __comp, __gnu_parallel::sequential_tag()); } // Public interface, insert default comparator template<typename _RAIter> inline void nth_element(_RAIter __begin, _RAIter __nth, _RAIter __end) { typedef typename iterator_traits<_RAIter>::value_type _ValueType; __gnu_parallel::nth_element(__begin, __nth, __end, std::less<_ValueType>()); } // Sequential fallback template<typename _RAIter, typename _Compare> inline void partial_sort(_RAIter __begin, _RAIter __middle, _RAIter __end, _Compare __comp, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::partial_sort(__begin, __middle, __end, __comp); } // Sequential fallback template<typename _RAIter> inline void partial_sort(_RAIter __begin, _RAIter __middle, _RAIter __end, __gnu_parallel::sequential_tag) { _GLIBCXX_STD_A::partial_sort(__begin, __middle, __end); } // Public interface, parallel algorithm for random access iterators template<typename _RAIter, typename _Compare> void partial_sort(_RAIter __begin, _RAIter __middle, _RAIter __end, _Compare __comp) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().partial_sort_minimal_n)) __gnu_parallel:: __parallel_partial_sort(__begin, __middle, __end, __comp); else partial_sort(__begin, __middle, __end, __comp, __gnu_parallel::sequential_tag()); } // Public interface, insert default comparator template<typename _RAIter> inline void partial_sort(_RAIter __begin, _RAIter __middle, _RAIter __end) { typedef iterator_traits<_RAIter> _TraitsType; typedef typename _TraitsType::value_type _ValueType; __gnu_parallel::partial_sort(__begin, __middle, __end, std::less<_ValueType>()); } // Sequential fallback template<typename _FIterator> inline _FIterator max_element(_FIterator __begin, _FIterator __end, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::max_element(__begin, __end); } // Sequential fallback template<typename _FIterator, typename _Compare> inline _FIterator max_element(_FIterator __begin, _FIterator __end, _Compare __comp, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::max_element(__begin, __end, __comp); } // Sequential fallback for input iterator case template<typename _FIterator, typename _Compare, typename _IteratorTag> inline _FIterator __max_element_switch(_FIterator __begin, _FIterator __end, _Compare __comp, _IteratorTag) { return max_element(__begin, __end, __comp, __gnu_parallel::sequential_tag()); } // Parallel algorithm for random access iterators template<typename _RAIter, typename _Compare> _RAIter __max_element_switch(_RAIter __begin, _RAIter __end, _Compare __comp, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().max_element_minimal_n && __gnu_parallel::__is_parallel(__parallelism_tag))) { _RAIter __res(__begin); __gnu_parallel::__identity_selector<_RAIter> __functionality; __gnu_parallel:: __for_each_template_random_access( __begin, __end, __gnu_parallel::_Nothing(), __functionality, __gnu_parallel::__max_element_reduct<_Compare, _RAIter>(__comp), __res, __res, -1, __parallelism_tag); return __res; } else return max_element(__begin, __end, __comp, __gnu_parallel::sequential_tag()); } // Public interface, insert default comparator template<typename _FIterator> inline _FIterator max_element(_FIterator __begin, _FIterator __end, __gnu_parallel::_Parallelism __parallelism_tag) { typedef typename iterator_traits<_FIterator>::value_type _ValueType; return max_element(__begin, __end, std::less<_ValueType>(), __parallelism_tag); } template<typename _FIterator> inline _FIterator max_element(_FIterator __begin, _FIterator __end) { typedef typename iterator_traits<_FIterator>::value_type _ValueType; return __gnu_parallel::max_element(__begin, __end, std::less<_ValueType>()); } // Public interface template<typename _FIterator, typename _Compare> inline _FIterator max_element(_FIterator __begin, _FIterator __end, _Compare __comp, __gnu_parallel::_Parallelism __parallelism_tag) { return __max_element_switch(__begin, __end, __comp, std::__iterator_category(__begin), __parallelism_tag); } template<typename _FIterator, typename _Compare> inline _FIterator max_element(_FIterator __begin, _FIterator __end, _Compare __comp) { return __max_element_switch(__begin, __end, __comp, std::__iterator_category(__begin)); } // Sequential fallback template<typename _FIterator> inline _FIterator min_element(_FIterator __begin, _FIterator __end, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::min_element(__begin, __end); } // Sequential fallback template<typename _FIterator, typename _Compare> inline _FIterator min_element(_FIterator __begin, _FIterator __end, _Compare __comp, __gnu_parallel::sequential_tag) { return _GLIBCXX_STD_A::min_element(__begin, __end, __comp); } // Sequential fallback for input iterator case template<typename _FIterator, typename _Compare, typename _IteratorTag> inline _FIterator __min_element_switch(_FIterator __begin, _FIterator __end, _Compare __comp, _IteratorTag) { return min_element(__begin, __end, __comp, __gnu_parallel::sequential_tag()); } // Parallel algorithm for random access iterators template<typename _RAIter, typename _Compare> _RAIter __min_element_switch(_RAIter __begin, _RAIter __end, _Compare __comp, random_access_iterator_tag, __gnu_parallel::_Parallelism __parallelism_tag) { if (_GLIBCXX_PARALLEL_CONDITION( static_cast<__gnu_parallel::_SequenceIndex>(__end - __begin) >= __gnu_parallel::_Settings::get().min_element_minimal_n && __gnu_parallel::__is_parallel(__parallelism_tag))) { _RAIter __res(__begin); __gnu_parallel::__identity_selector<_RAIter> __functionality; __gnu_parallel:: __for_each_template_random_access( __begin, __end, __gnu_parallel::_Nothing(), __functionality, __gnu_parallel::__min_element_reduct<_Compare, _RAIter>(__comp), __res, __res, -1, __parallelism_tag); return __res; } else return min_element(__begin, __end, __comp, __gnu_parallel::sequential_tag()); } // Public interface, insert default comparator template<typename _FIterator> inline _FIterator min_element(_FIterator __begin, _FIterator __end, __gnu_parallel::_Parallelism __parallelism_tag) { typedef typename iterator_traits<_FIterator>::value_type _ValueType; return min_element(__begin, __end, std::less<_ValueType>(), __parallelism_tag); } template<typename _FIterator> inline _FIterator min_element(_FIterator __begin, _FIterator __end) { typedef typename iterator_traits<_FIterator>::value_type _ValueType; return __gnu_parallel::min_element(__begin, __end, std::less<_ValueType>()); } // Public interface template<typename _FIterator, typename _Compare> inline _FIterator min_element(_FIterator __begin, _FIterator __end, _Compare __comp, __gnu_parallel::_Parallelism __parallelism_tag) { return __min_element_switch(__begin, __end, __comp, std::__iterator_category(__begin), __parallelism_tag); } template<typename _FIterator, typename _Compare> inline _FIterator min_element(_FIterator __begin, _FIterator __end, _Compare __comp) { return __min_element_switch(__begin, __end, __comp, std::__iterator_category(__begin)); } #if __cplusplus >= 201703L using _GLIBCXX_STD_A::for_each_n; using _GLIBCXX_STD_A::sample; #endif } // end namespace } // end namespace #endif /* _GLIBCXX_PARALLEL_ALGO_H */