Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / include / parallel / for_each.h

diff --git a/libstdc++-v3/include/parallel/for_each.h b/libstdc++-v3/include/parallel/for_each.h
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+// -*- 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/for_each.h
+ *  @brief Main interface for embarrassingly parallel functions.
+ *
+ *  The explicit implementation are in other header files, like
+ *  workstealing.h, par_loop.h, omp_loop.h, and omp_loop_static.h.
+ *  This file is a GNU parallel extension to the Standard C++ Library.
+ */
+
+// Written by Felix Putze.
+
+#ifndef _GLIBCXX_PARALLEL_FOR_EACH_H
+#define _GLIBCXX_PARALLEL_FOR_EACH_H 1
+
+#include <parallel/settings.h>
+#include <parallel/par_loop.h>
+#include <parallel/omp_loop.h>
+#include <parallel/workstealing.h>
+
+namespace __gnu_parallel
+{
+  /** @brief Chose the desired algorithm by evaluating @c parallelism_tag.
+   *  @param begin Begin iterator of input sequence.
+   *  @param end End iterator of input sequence.
+   *  @param user_op A user-specified functor (comparator, predicate,
+   *  associative operator,...)
+   *  @param functionality functor to "process" an element with
+   *  user_op (depends on desired functionality, e. g. accumulate,
+   *  for_each,...
+   *  @param reduction Reduction functor.
+   *  @param reduction_start Initial value for reduction.
+   *  @param output Output iterator.
+   *  @param bound Maximum number of elements processed.
+   *  @param parallelism_tag Parallelization method */
+  template<typename InputIterator, typename UserOp,
+          typename Functionality, typename Red, typename Result>
+    UserOp
+    for_each_template_random_access(InputIterator begin, InputIterator end,
+                                   UserOp user_op,
+                                   Functionality& functionality,
+                                   Red reduction, Result reduction_start,
+                                   Result& output, typename
+                                   std::iterator_traits<InputIterator>::
+                                   difference_type bound,
+                                   _Parallelism parallelism_tag)
+    {
+      if (parallelism_tag == parallel_unbalanced)
+       return for_each_template_random_access_ed(begin, end, user_op,
+                                                 functionality, reduction,
+                                                 reduction_start,
+                                                 output, bound);
+      else if (parallelism_tag == parallel_omp_loop)
+       return for_each_template_random_access_omp_loop(begin, end, user_op,
+                                                       functionality,
+                                                       reduction,
+                                                       reduction_start,
+                                                       output, bound);
+      else if (parallelism_tag == parallel_omp_loop_static)
+       return for_each_template_random_access_omp_loop(begin, end, user_op,
+                                                       functionality,
+                                                       reduction,
+                                                       reduction_start,
+                                                       output, bound);
+      else     //e. g. parallel_balanced
+       return for_each_template_random_access_workstealing(begin, end,
+                                                           user_op,
+                                                           functionality,
+                                                           reduction,
+                                                           reduction_start,
+                                                           output, bound);
+  }
+}
+
+#endif /* _GLIBCXX_PARALLEL_FOR_EACH_H */