// -*- C++ -*-
-// Copyright (C) 2007 Free Software Foundation, Inc.
+// 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 2, or (at your option) any later
+// Foundation; either version 3, or (at your option) any later
// version.
// This library is distributed in the hope that it will be useful, but
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
-// You should have received a copy of the GNU General Public License
-// along with this library; see the file COPYING. If not, write to
-// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
-// MA 02111-1307, USA.
-
-// As a special exception, you may use this file as part of a free
-// software library without restriction. Specifically, if other files
-// instantiate templates or use macros or inline functions from this
-// file, or you compile this file and link it with other files to
-// produce an executable, this file does not by itself cause the
-// resulting executable to be covered by the GNU General Public
-// License. This exception does not however invalidate any other
-// reasons why the executable file might be covered by the GNU General
-// Public License.
+// 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 options.
+ * @brief Tags for compile-time selection.
* This file is a GNU parallel extension to the Standard C++ Library.
*/
#ifndef _GLIBCXX_PARALLEL_TAGS_H
#define _GLIBCXX_PARALLEL_TAGS_H 1
-// Parallel mode namespaces.
-namespace std
-{
- namespace __parallel { }
-}
-
-/**
- * @namespace __gnu_sequential
- * @brief GNU sequential classes for public use.
- */
-namespace __gnu_sequential { }
+#include <omp.h>
+#include <parallel/types.h>
-/**
- * @namespace __gnu_parallel
- * @brief GNU parallel classes for public use.
- */
namespace __gnu_parallel
{
- // Import all the parallel versions of components in namespace std.
- using namespace std::__parallel;
-
- enum parallelism
- {
- /// Not parallel.
- sequential,
-
- /// Parallel unbalanced (equal-sized chunks).
- parallel_unbalanced,
-
- /// Parallel balanced (work-stealing).
- parallel_balanced,
-
- /// Parallel with OpenMP dynamic load-balancing.
- parallel_omp_loop,
-
- /// Parallel with OpenMP static load-balancing.
- parallel_omp_loop_static,
-
- /// Parallel with OpenMP taskqueue construct.
- parallel_taskqueue
- };
-
- inline bool
- is_parallel(const parallelism __p) { return __p != sequential; }
-
-
/** @brief Forces sequential execution at compile time. */
struct sequential_tag { };
- /** @brief Recommends parallel execution at compile time. */
- struct parallel_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 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 { };
+ 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 { };
+ 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 { };
+ struct equal_split_tag : public find_tag { };
}
#endif /* _GLIBCXX_PARALLEL_TAGS_H */
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