--- /dev/null
+// -*- 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/tags.h
+ * @brief Tags for compile-time selection.
+ * This file is a GNU parallel extension to the Standard C++ Library.
+ */
+
+// Written by Johannes Singler and Felix Putze.
+
+#ifndef _GLIBCXX_PARALLEL_TAGS_H
+#define _GLIBCXX_PARALLEL_TAGS_H 1
+
+#include <omp.h>
+#include <parallel/types.h>
+
+namespace __gnu_parallel
+{
+ /** @brief Forces sequential execution at compile time. */
+ struct sequential_tag { };
+
+ /** @brief Recommends parallel execution at compile time,
+ * optionally using a user-specified number of threads. */
+ struct parallel_tag
+ {
+ private:
+ thread_index_t num_threads;
+
+ public:
+ /** @brief Default constructor. Use default number of threads. */
+ parallel_tag()
+ {
+ this->num_threads = 0;
+ }
+
+ /** @brief Default constructor. Recommend number of threads to use.
+ * @param num_threads Desired number of threads. */
+ parallel_tag(thread_index_t num_threads)
+ {
+ this->num_threads = num_threads;
+ }
+
+ /** @brief Find out desired number of threads.
+ * @return Desired number of threads. */
+ inline thread_index_t get_num_threads()
+ {
+ if(num_threads == 0)
+ return omp_get_max_threads();
+ else
+ return num_threads;
+ }
+
+ /** @brief Set the desired number of threads.
+ * @param num_threads Desired number of threads. */
+ inline void set_num_threads(thread_index_t num_threads)
+ {
+ this->num_threads = num_threads;
+ }
+ };
+
+ /** @brief Recommends parallel execution using the
+ default parallel algorithm. */
+ struct default_parallel_tag : public parallel_tag
+ {
+ default_parallel_tag() { }
+ default_parallel_tag(thread_index_t num_threads)
+ : parallel_tag(num_threads) { }
+ };
+
+ /** @brief Recommends parallel execution using dynamic
+ load-balancing at compile time. */
+ struct balanced_tag : public parallel_tag { };
+
+ /** @brief Recommends parallel execution using static
+ load-balancing at compile time. */
+ struct unbalanced_tag : public parallel_tag { };
+
+ /** @brief Recommends parallel execution using OpenMP dynamic
+ load-balancing at compile time. */
+ struct omp_loop_tag : public parallel_tag { };
+
+ /** @brief Recommends parallel execution using OpenMP static
+ load-balancing at compile time. */
+ struct omp_loop_static_tag : public parallel_tag { };
+
+
+ /** @brief Base class for for std::find() variants. */
+ struct find_tag { };
+
+
+ /** @brief Forces parallel merging
+ * with exact splitting, at compile time. */
+ struct exact_tag : public parallel_tag
+ {
+ exact_tag() { }
+ exact_tag(thread_index_t num_threads)
+ : parallel_tag(num_threads) { }
+ };
+
+ /** @brief Forces parallel merging
+ * with exact splitting, at compile time. */
+ struct sampling_tag : public parallel_tag
+ {
+ sampling_tag() { }
+ sampling_tag(thread_index_t num_threads)
+ : parallel_tag(num_threads) { }
+ };
+
+
+ /** @brief Forces parallel sorting using multiway mergesort
+ * at compile time. */
+ struct multiway_mergesort_tag : public parallel_tag
+ {
+ multiway_mergesort_tag() { }
+ multiway_mergesort_tag(thread_index_t num_threads)
+ : parallel_tag(num_threads) { }
+ };
+
+ /** @brief Forces parallel sorting using multiway mergesort
+ * with exact splitting at compile time. */
+ struct multiway_mergesort_exact_tag : public parallel_tag
+ {
+ multiway_mergesort_exact_tag() { }
+ multiway_mergesort_exact_tag(thread_index_t num_threads)
+ : parallel_tag(num_threads) { }
+ };
+
+ /** @brief Forces parallel sorting using multiway mergesort
+ * with splitting by sampling at compile time. */
+ struct multiway_mergesort_sampling_tag : public parallel_tag
+ {
+ multiway_mergesort_sampling_tag() { }
+ multiway_mergesort_sampling_tag(thread_index_t num_threads)
+ : parallel_tag(num_threads) { }
+ };
+
+ /** @brief Forces parallel sorting using unbalanced quicksort
+ * at compile time. */
+ struct quicksort_tag : public parallel_tag
+ {
+ quicksort_tag() { }
+ quicksort_tag(thread_index_t num_threads)
+ : parallel_tag(num_threads) { }
+ };
+
+ /** @brief Forces parallel sorting using balanced quicksort
+ * at compile time. */
+ struct balanced_quicksort_tag : public parallel_tag
+ {
+ balanced_quicksort_tag() { }
+ balanced_quicksort_tag(thread_index_t num_threads)
+ : parallel_tag(num_threads) { }
+ };
+
+
+ /** @brief Selects the growing block size variant for std::find().
+ @see _GLIBCXX_FIND_GROWING_BLOCKS */
+ struct growing_blocks_tag : public find_tag { };
+
+ /** @brief Selects the constant block size variant for std::find().
+ @see _GLIBCXX_FIND_CONSTANT_SIZE_BLOCKS */
+ struct constant_size_blocks_tag : public find_tag { };
+
+ /** @brief Selects the equal splitting variant for std::find().
+ @see _GLIBCXX_FIND_EQUAL_SPLIT */
+ struct equal_split_tag : public find_tag { };
+}
+
+#endif /* _GLIBCXX_PARALLEL_TAGS_H */
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