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Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/parallel/unique_copy.h')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/include/parallel/unique_copy.h | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/include/parallel/unique_copy.h b/gcc-4.4.3/libstdc++-v3/include/parallel/unique_copy.h deleted file mode 100644 index a83c2c0c5..000000000 --- a/gcc-4.4.3/libstdc++-v3/include/parallel/unique_copy.h +++ /dev/null @@ -1,192 +0,0 @@ -// -*- 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/unique_copy.h - * @brief Parallel implementations of std::unique_copy(). - * This file is a GNU parallel extension to the Standard C++ Library. - */ - -// Written by Robert Geisberger and Robin Dapp. - -#ifndef _GLIBCXX_PARALLEL_UNIQUE_COPY_H -#define _GLIBCXX_PARALLEL_UNIQUE_COPY_H 1 - -#include <parallel/parallel.h> -#include <parallel/multiseq_selection.h> - -namespace __gnu_parallel -{ - -/** @brief Parallel std::unique_copy(), w/o explicit equality predicate. - * @param first Begin iterator of input sequence. - * @param last End iterator of input sequence. - * @param result Begin iterator of result sequence. - * @param binary_pred Equality predicate. - * @return End iterator of result sequence. */ -template<typename InputIterator, - class OutputIterator, - class BinaryPredicate> - OutputIterator - parallel_unique_copy(InputIterator first, InputIterator last, - OutputIterator result, BinaryPredicate binary_pred) - { - _GLIBCXX_CALL(last - first) - - typedef std::iterator_traits<InputIterator> traits_type; - typedef typename traits_type::value_type value_type; - typedef typename traits_type::difference_type difference_type; - - difference_type size = last - first; - - if (size == 0) - return result; - - // Let the first thread process two parts. - difference_type *counter; - difference_type *borders; - - thread_index_t num_threads = get_max_threads(); - // First part contains at least one element. -# pragma omp parallel num_threads(num_threads) - { -# pragma omp single - { - num_threads = omp_get_num_threads(); - borders = new difference_type[num_threads + 2]; - equally_split(size, num_threads + 1, borders); - counter = new difference_type[num_threads + 1]; - } - - thread_index_t iam = omp_get_thread_num(); - - difference_type begin, end; - - // Check for length without duplicates - // Needed for position in output - difference_type i = 0; - OutputIterator out = result; - - if (iam == 0) - { - begin = borders[0] + 1; // == 1 - end = borders[iam + 1]; - - ++i; - *out++ = *first; - - for (InputIterator iter = first + begin; iter < first + end; ++iter) - { - if (!binary_pred(*iter, *(iter-1))) - { - ++i; - *out++ = *iter; - } - } - } - else - { - begin = borders[iam]; //one part - end = borders[iam + 1]; - - for (InputIterator iter = first + begin; iter < first + end; ++iter) - { - if (!binary_pred(*iter, *(iter - 1))) - ++i; - } - } - counter[iam] = i; - - // Last part still untouched. - difference_type begin_output; - -# pragma omp barrier - - // Store result in output on calculated positions. - begin_output = 0; - - if (iam == 0) - { - for (int t = 0; t < num_threads; ++t) - begin_output += counter[t]; - - i = 0; - - OutputIterator iter_out = result + begin_output; - - begin = borders[num_threads]; - end = size; - - for (InputIterator iter = first + begin; iter < first + end; ++iter) - { - if (iter == first || !binary_pred(*iter, *(iter - 1))) - { - ++i; - *iter_out++ = *iter; - } - } - - counter[num_threads] = i; - } - else - { - for (int t = 0; t < iam; t++) - begin_output += counter[t]; - - OutputIterator iter_out = result + begin_output; - for (InputIterator iter = first + begin; iter < first + end; ++iter) - { - if (!binary_pred(*iter, *(iter-1))) - *iter_out++ = *iter; - } - } - } - - difference_type end_output = 0; - for (int t = 0; t < num_threads + 1; t++) - end_output += counter[t]; - - delete[] borders; - - return result + end_output; - } - -/** @brief Parallel std::unique_copy(), without explicit equality predicate - * @param first Begin iterator of input sequence. - * @param last End iterator of input sequence. - * @param result Begin iterator of result sequence. - * @return End iterator of result sequence. */ -template<typename InputIterator, class OutputIterator> - inline OutputIterator - parallel_unique_copy(InputIterator first, InputIterator last, - OutputIterator result) - { - typedef typename std::iterator_traits<InputIterator>::value_type - value_type; - return parallel_unique_copy(first, last, result, - std::equal_to<value_type>()); - } - -}//namespace __gnu_parallel - -#endif /* _GLIBCXX_PARALLEL_UNIQUE_COPY_H */ |