Added boost header

test/external/boost/mpi/collectives/all_gather.hpp

@@ -0,0 +1,82 @@
+// Copyright (C) 2005-2006 Douglas Gregor <doug.gregor -at- gmail.com>.
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// Message Passing Interface 1.1 -- Section 4.7. Gather-to-all
+#ifndef BOOST_MPI_ALL_GATHER_HPP
+#define BOOST_MPI_ALL_GATHER_HPP
+
+#include <boost/mpi/exception.hpp>
+#include <boost/mpi/datatype.hpp>
+#include <vector>
+#include <boost/serialization/vector.hpp>
+
+// all_gather falls back to gather+broadcast in some cases
+#include <boost/mpi/collectives/broadcast.hpp>
+#include <boost/mpi/collectives/gather.hpp>
+
+namespace boost { namespace mpi {
+
+namespace detail {
+  // We're all-gathering for a type that has an associated MPI
+  // datatype, so we'll use MPI_Gather to do all of the work.
+  template<typename T>
+  void
+  all_gather_impl(const communicator& comm, const T* in_values, int n, 
+                  T* out_values, mpl::true_)
+  {
+    MPI_Datatype type = boost::mpi::get_mpi_datatype<T>(*in_values);
+    BOOST_MPI_CHECK_RESULT(MPI_Allgather,
+                           (const_cast<T*>(in_values), n, type,
+                            out_values, n, type, comm));
+  }
+
+  // We're all-gathering for a type that has no associated MPI
+  // type. So, we'll do a manual gather followed by a broadcast.
+  template<typename T>
+  void
+  all_gather_impl(const communicator& comm, const T* in_values, int n, 
+                  T* out_values, mpl::false_)
+  {
+    gather(comm, in_values, n, out_values, 0);
+    broadcast(comm, out_values, comm.size() * n, 0);
+  }
+} // end namespace detail
+
+template<typename T>
+inline void
+all_gather(const communicator& comm, const T& in_value, T* out_values)
+{
+  detail::all_gather_impl(comm, &in_value, 1, out_values, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void
+all_gather(const communicator& comm, const T& in_value, 
+           std::vector<T>& out_values)
+{
+  out_values.resize(comm.size());
+  ::boost::mpi::all_gather(comm, &in_value, 1, &out_values[0]);
+}
+
+template<typename T>
+inline void
+all_gather(const communicator& comm, const T* in_values, int n, T* out_values)
+{
+  detail::all_gather_impl(comm, in_values, n, out_values, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void
+all_gather(const communicator& comm, const T* in_values, int n,
+           std::vector<T>& out_values)
+{
+  out_values.resize(comm.size() * n);
+  ::boost::mpi::all_gather(comm, in_values, n, &out_values[0]);
+}
+
+} } // end namespace boost::mpi
+
+#endif // BOOST_MPI_ALL_GATHER_HPP

test/external/boost/mpi/collectives/all_reduce.hpp

@@ -0,0 +1,102 @@
+// Copyright (C) 2005-2006 Douglas Gregor <doug.gregor -at- gmail.com>
+// Copyright (C) 2004 The Trustees of Indiana University
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//   Authors: Douglas Gregor
+//            Andrew Lumsdaine
+
+// Message Passing Interface 1.1 -- Section 4.9.1. Reduce
+#ifndef BOOST_MPI_ALL_REDUCE_HPP
+#define BOOST_MPI_ALL_REDUCE_HPP
+
+// All-reduce falls back to reduce() + broadcast() in some cases.
+#include <boost/mpi/collectives/broadcast.hpp>
+#include <boost/mpi/collectives/reduce.hpp>
+
+namespace boost { namespace mpi {
+
+namespace detail {
+  /**********************************************************************
+   * Simple reduction with MPI_Allreduce                                *
+   **********************************************************************/
+  // We are reducing for a type that has an associated MPI
+  // datatype and operation, so we'll use MPI_Allreduce directly.
+  template<typename T, typename Op>
+  void
+  all_reduce_impl(const communicator& comm, const T* in_values, int n,
+                  T* out_values, Op /*op*/, mpl::true_ /*is_mpi_op*/,
+                  mpl::true_ /*is_mpi_datatype*/)
+  {
+    BOOST_MPI_CHECK_RESULT(MPI_Allreduce,
+                           (const_cast<T*>(in_values), out_values, n,
+                            boost::mpi::get_mpi_datatype<T>(*in_values),
+                            (is_mpi_op<Op, T>::op()), comm));
+  }
+
+  /**********************************************************************
+   * User-defined reduction with MPI_Allreduce                          *
+   **********************************************************************/
+  // We are reducing at the root for a type that has an associated MPI
+  // datatype but with a custom operation. We'll use MPI_Reduce
+  // directly, but we'll need to create an MPI_Op manually.
+  template<typename T, typename Op>
+  void
+  all_reduce_impl(const communicator& comm, const T* in_values, int n,
+                  T* out_values, Op op, mpl::false_ /*is_mpi_op*/,
+                  mpl::true_ /*is_mpi_datatype*/)
+  {
+    user_op<Op, T> mpi_op(op);
+    BOOST_MPI_CHECK_RESULT(MPI_Allreduce,
+                           (const_cast<T*>(in_values), out_values, n,
+                            boost::mpi::get_mpi_datatype<T>(*in_values),
+                            mpi_op.get_mpi_op(), comm));
+  }
+
+  /**********************************************************************
+   * User-defined, tree-based reduction for non-MPI data types          *
+   **********************************************************************/
+  // We are reducing at the root for a type that has no associated MPI
+  // datatype and operation, so we'll use a simple tree-based
+  // algorithm.
+  template<typename T, typename Op>
+  void
+  all_reduce_impl(const communicator& comm, const T* in_values, int n,
+                  T* out_values, Op op, mpl::false_ /*is_mpi_op*/,
+                  mpl::false_ /*is_mpi_datatype*/)
+  {
+    reduce(comm, in_values, n, out_values, op, 0);
+    broadcast(comm, out_values, n, 0);
+  }
+} // end namespace detail
+
+template<typename T, typename Op>
+inline void
+all_reduce(const communicator& comm, const T* in_values, int n, T* out_values,
+           Op op)
+{
+  detail::all_reduce_impl(comm, in_values, n, out_values, op,
+                          is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+}
+
+template<typename T, typename Op>
+inline void
+all_reduce(const communicator& comm, const T& in_value, T& out_value, Op op)
+{
+  detail::all_reduce_impl(comm, &in_value, 1, &out_value, op,
+                          is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+}
+
+template<typename T, typename Op>
+T all_reduce(const communicator& comm, const T& in_value, Op op)
+{
+  T result;
+  ::boost::mpi::all_reduce(comm, in_value, result, op);
+  return result;
+}
+
+} } // end namespace boost::mpi
+
+#endif // BOOST_MPI_ALL_REDUCE_HPP

test/external/boost/mpi/collectives/all_to_all.hpp

@@ -0,0 +1,153 @@
+// Copyright (C) 2005, 2006 Douglas Gregor.
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// Message Passing Interface 1.1 -- Section 4.8. All-to-all
+#ifndef BOOST_MPI_ALL_TO_ALL_HPP
+#define BOOST_MPI_ALL_TO_ALL_HPP
+
+#include <boost/mpi/exception.hpp>
+#include <boost/mpi/datatype.hpp>
+#include <vector>
+#include <boost/mpi/packed_oarchive.hpp>
+#include <boost/mpi/packed_iarchive.hpp>
+#include <boost/mpi/communicator.hpp>
+#include <boost/mpi/environment.hpp>
+#include <boost/assert.hpp>
+#include <boost/mpi/collectives_fwd.hpp>
+#include <boost/mpi/allocator.hpp>
+
+namespace boost { namespace mpi {
+          
+namespace detail {
+  // We're performaing an all-to-all with a type that has an
+  // associated MPI datatype, so we'll use MPI_Alltoall to do all of
+  // the work.
+  template<typename T>
+  void
+  all_to_all_impl(const communicator& comm, const T* in_values, int n, 
+                  T* out_values, mpl::true_)
+  {
+    MPI_Datatype type = get_mpi_datatype<T>(*in_values);
+    BOOST_MPI_CHECK_RESULT(MPI_Alltoall,
+                           (const_cast<T*>(in_values), n, type,
+                            out_values, n, type, comm));
+  }
+
+  // We're performing an all-to-all with a type that does not have an
+  // associated MPI datatype, so we'll need to serialize
+  // it. Unfortunately, this means that we cannot use MPI_Alltoall, so
+  // we'll just have to send individual messages to the other
+  // processes.
+  template<typename T>
+  void
+  all_to_all_impl(const communicator& comm, const T* in_values, int n,
+                  T* out_values, mpl::false_)
+  {
+    int size = comm.size();
+    int rank = comm.rank();
+
+    // The amount of data to be sent to each process
+    std::vector<int> send_sizes(size);
+
+    // The displacements for each outgoing value.
+    std::vector<int> send_disps(size);
+
+    // The buffer that will store all of the outgoing values
+    std::vector<char, allocator<char> > outgoing;
+
+    // Pack the buffer with all of the outgoing values.
+    for (int dest = 0; dest < size; ++dest) {
+      // Keep track of the displacements
+      send_disps[dest] = outgoing.size();
+
+      // Our own value will never be transmitted, so don't pack it.
+      if (dest != rank) {
+        packed_oarchive oa(comm, outgoing);
+        for (int i = 0; i < n; ++i)
+          oa << in_values[dest * n + i];
+      }
+
+      // Keep track of the sizes
+      send_sizes[dest] = outgoing.size() - send_disps[dest];
+    }
+
+    // Determine how much data each process will receive.
+    std::vector<int> recv_sizes(size);
+    all_to_all(comm, send_sizes, recv_sizes);
+
+    // Prepare a buffer to receive the incoming data.
+    std::vector<int> recv_disps(size);
+    int sum = 0;
+    for (int src = 0; src < size; ++src) {
+      recv_disps[src] = sum;
+      sum += recv_sizes[src];
+    }
+    std::vector<char, allocator<char> > incoming(sum > 0? sum : 1);
+
+    // Make sure we don't try to reference an empty vector
+    if (outgoing.empty())
+      outgoing.push_back(0);
+
+    // Transmit the actual data
+    BOOST_MPI_CHECK_RESULT(MPI_Alltoallv,
+                           (&outgoing[0], &send_sizes[0],
+                            &send_disps[0], MPI_PACKED,
+                            &incoming[0], &recv_sizes[0],
+                            &recv_disps[0], MPI_PACKED,
+                            comm));
+
+    // Deserialize data from the iarchive
+    for (int src = 0; src < size; ++src) {
+      if (src == rank) 
+        std::copy(in_values + src * n, in_values + (src + 1) * n, 
+                  out_values + src * n);
+      else {
+        packed_iarchive ia(comm, incoming, boost::archive::no_header,
+                           recv_disps[src]);
+        for (int i = 0; i < n; ++i)
+          ia >> out_values[src * n + i];
+      }
+    }
+  }
+} // end namespace detail
+
+template<typename T>
+inline void
+all_to_all(const communicator& comm, const T* in_values, T* out_values)
+{
+  detail::all_to_all_impl(comm, in_values, 1, out_values, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void
+all_to_all(const communicator& comm, const std::vector<T>& in_values,
+           std::vector<T>& out_values)
+{
+  BOOST_ASSERT((int)in_values.size() == comm.size());
+  out_values.resize(comm.size());
+  ::boost::mpi::all_to_all(comm, &in_values[0], &out_values[0]);
+}
+
+template<typename T>
+inline void
+all_to_all(const communicator& comm, const T* in_values, int n, T* out_values)
+{
+  detail::all_to_all_impl(comm, in_values, n, out_values, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void
+all_to_all(const communicator& comm, const std::vector<T>& in_values, int n,
+           std::vector<T>& out_values)
+{
+  BOOST_ASSERT((int)in_values.size() == comm.size() * n);
+  out_values.resize(comm.size() * n);
+  ::boost::mpi::all_to_all(comm, &in_values[0], n, &out_values[0]);
+}
+
+} } // end namespace boost::mpi
+
+#endif // BOOST_MPI_ALL_TO_ALL_HPP

test/external/boost/mpi/collectives/broadcast.hpp

@@ -0,0 +1,145 @@
+// Copyright (C) 2005, 2006 Douglas Gregor <doug.gregor -at- gmail.com>.
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// Message Passing Interface 1.1 -- Section 4.4. Broadcast
+#ifndef BOOST_MPI_BROADCAST_HPP
+#define BOOST_MPI_BROADCAST_HPP
+
+#include <boost/mpi/collectives_fwd.hpp>
+#include <boost/mpi/exception.hpp>
+#include <boost/mpi/datatype.hpp>
+#include <boost/mpi/communicator.hpp>
+
+namespace boost { namespace mpi {
+
+/************************************************************************
+ * Specializations                                                      *
+ ************************************************************************/
+
+/**
+ * INTERNAL ONLY
+ */
+template<>
+BOOST_MPI_DECL void
+broadcast<const packed_oarchive>(const communicator& comm,
+                                 const packed_oarchive& oa,
+                                 int root);
+
+/**
+ * INTERNAL ONLY
+ */
+template<>
+BOOST_MPI_DECL void
+broadcast<packed_oarchive>(const communicator& comm, packed_oarchive& oa,
+                           int root);
+
+/**
+ * INTERNAL ONLY
+ */
+template<>
+BOOST_MPI_DECL void
+broadcast<packed_iarchive>(const communicator& comm, packed_iarchive& ia,
+                           int root);
+
+/**
+ * INTERNAL ONLY
+ */
+template<>
+BOOST_MPI_DECL void
+broadcast<const packed_skeleton_oarchive>(const communicator& comm,
+                                          const packed_skeleton_oarchive& oa,
+                                          int root);
+
+/**
+ * INTERNAL ONLY
+ */
+template<>
+void
+broadcast<packed_skeleton_oarchive>(const communicator& comm,
+                                    packed_skeleton_oarchive& oa, int root);
+
+/**
+ * INTERNAL ONLY
+ */
+template<>
+void
+broadcast<packed_skeleton_iarchive>(const communicator& comm,
+                                    packed_skeleton_iarchive& ia, int root);
+
+/**
+ * INTERNAL ONLY
+ */
+template<>
+void broadcast<content>(const communicator& comm, content& c, int root);
+
+/**
+ * INTERNAL ONLY
+ */
+template<>
+void broadcast<const content>(const communicator& comm, const content& c,
+                              int root);
+
+/************************************************************************
+ * broadcast() implementation                                           *
+ ************************************************************************/
+namespace detail {
+  // We're sending a type that has an associated MPI datatype, so
+  // we'll use MPI_Bcast to do all of the work.
+  template<typename T>
+  void 
+  broadcast_impl(const communicator& comm, T* values, int n, int root, 
+                 mpl::true_)
+  {
+    BOOST_MPI_CHECK_RESULT(MPI_Bcast,
+                           (values, n,
+                            boost::mpi::get_mpi_datatype<T>(*values),
+                            root, MPI_Comm(comm)));
+  }
+
+  // We're sending a type that does not have an associated MPI
+  // datatype, so we'll need to serialize it. Unfortunately, this
+  // means that we cannot use MPI_Bcast, so we'll just send from the
+  // root to everyone else.
+  template<typename T>
+  void
+  broadcast_impl(const communicator& comm, T* values, int n, int root, 
+                 mpl::false_)
+  {
+    if (comm.rank() == root) {
+      packed_oarchive oa(comm);
+      for (int i = 0; i < n; ++i)
+        oa << values[i];
+      broadcast(comm, oa, root);
+    } else {
+      packed_iarchive ia(comm);
+      broadcast(comm, ia, root);
+      for (int i = 0; i < n; ++i)
+        ia >> values[i];
+    }
+  }
+} // end namespace detail
+
+template<typename T>
+void broadcast(const communicator& comm, T& value, int root)
+{
+  detail::broadcast_impl(comm, &value, 1, root, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void broadcast(const communicator& comm, T* values, int n, int root)
+{
+  detail::broadcast_impl(comm, values, n, root, is_mpi_datatype<T>());
+}
+
+} } // end namespace boost::mpi
+
+// If the user has already included skeleton_and_content.hpp, include
+// the code to broadcast skeletons and content.
+#ifdef BOOST_MPI_SKELETON_AND_CONTENT_HPP
+#  include <boost/mpi/detail/broadcast_sc.hpp>
+#endif
+
+#endif // BOOST_MPI_BROADCAST_HPP

test/external/boost/mpi/collectives/gather.hpp

@@ -0,0 +1,147 @@
+// Copyright (C) 2005, 2006 Douglas Gregor.
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// Message Passing Interface 1.1 -- Section 4.5. Gather
+#ifndef BOOST_MPI_GATHER_HPP
+#define BOOST_MPI_GATHER_HPP
+
+#include <boost/mpi/exception.hpp>
+#include <boost/mpi/datatype.hpp>
+#include <vector>
+#include <boost/mpi/packed_oarchive.hpp>
+#include <boost/mpi/packed_iarchive.hpp>
+#include <boost/mpi/detail/point_to_point.hpp>
+#include <boost/mpi/communicator.hpp>
+#include <boost/mpi/environment.hpp>
+#include <boost/assert.hpp>
+
+namespace boost { namespace mpi {
+
+namespace detail {
+  // We're gathering at the root for a type that has an associated MPI
+  // datatype, so we'll use MPI_Gather to do all of the work.
+  template<typename T>
+  void
+  gather_impl(const communicator& comm, const T* in_values, int n, 
+              T* out_values, int root, mpl::true_)
+  {
+    MPI_Datatype type = get_mpi_datatype<T>(*in_values);
+    BOOST_MPI_CHECK_RESULT(MPI_Gather,
+                           (const_cast<T*>(in_values), n, type,
+                            out_values, n, type, root, comm));
+  }
+
+  // We're gathering from a non-root for a type that has an associated MPI
+  // datatype, so we'll use MPI_Gather to do all of the work.
+  template<typename T>
+  void
+  gather_impl(const communicator& comm, const T* in_values, int n, int root, 
+              mpl::true_)
+  {
+    MPI_Datatype type = get_mpi_datatype<T>(*in_values);
+    BOOST_MPI_CHECK_RESULT(MPI_Gather,
+                           (const_cast<T*>(in_values), n, type,
+                            0, n, type, root, comm));
+  }
+
+  // We're gathering at the root for a type that does not have an
+  // associated MPI datatype, so we'll need to serialize
+  // it. Unfortunately, this means that we cannot use MPI_Gather, so
+  // we'll just have all of the non-root nodes send individual
+  // messages to the root.
+  template<typename T>
+  void
+  gather_impl(const communicator& comm, const T* in_values, int n, 
+              T* out_values, int root, mpl::false_)
+  {
+    int tag = environment::collectives_tag();
+    int size = comm.size();
+
+    for (int src = 0; src < size; ++src) {
+      if (src == root)
+        std::copy(in_values, in_values + n, out_values + n * src);
+      else
+        comm.recv(src, tag, out_values + n * src, n);
+    }
+  }
+
+  // We're gathering at a non-root for a type that does not have an
+  // associated MPI datatype, so we'll need to serialize
+  // it. Unfortunately, this means that we cannot use MPI_Gather, so
+  // we'll just have all of the non-root nodes send individual
+  // messages to the root.
+  template<typename T>
+  void
+  gather_impl(const communicator& comm, const T* in_values, int n, int root, 
+              mpl::false_)
+  {
+    int tag = environment::collectives_tag();
+    comm.send(root, tag, in_values, n);
+  }
+} // end namespace detail
+
+template<typename T>
+void
+gather(const communicator& comm, const T& in_value, T* out_values, int root)
+{
+  if (comm.rank() == root)
+    detail::gather_impl(comm, &in_value, 1, out_values, root, 
+                        is_mpi_datatype<T>());
+  else
+    detail::gather_impl(comm, &in_value, 1, root, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void gather(const communicator& comm, const T& in_value, int root)
+{
+  BOOST_ASSERT(comm.rank() != root);
+  detail::gather_impl(comm, &in_value, 1, root, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void
+gather(const communicator& comm, const T& in_value, std::vector<T>& out_values,
+       int root)
+{
+  if (comm.rank() == root) {
+    out_values.resize(comm.size());
+    ::boost::mpi::gather(comm, in_value, &out_values[0], root);
+  } else {
+    ::boost::mpi::gather(comm, in_value, root);
+  }
+}
+
+template<typename T>
+void
+gather(const communicator& comm, const T* in_values, int n, T* out_values, 
+       int root)
+{
+  if (comm.rank() == root)
+    detail::gather_impl(comm, in_values, n, out_values, root, 
+                        is_mpi_datatype<T>());
+  else
+    detail::gather_impl(comm, in_values, n, root, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void
+gather(const communicator& comm, const T* in_values, int n, 
+       std::vector<T>& out_values, int root)
+{
+  ::boost::mpi::gather(comm, in_values, n, &out_values[0], root);
+}
+
+template<typename T>
+void gather(const communicator& comm, const T* in_values, int n, int root)
+{
+  BOOST_ASSERT(comm.rank() != root);
+  detail::gather_impl(comm, in_values, n, root, is_mpi_datatype<T>());
+}
+
+
+} } // end namespace boost::mpi
+
+#endif // BOOST_MPI_GATHER_HPP

test/external/boost/mpi/collectives/reduce.hpp

@@ -0,0 +1,357 @@
+// Copyright (C) 2005-2006 Douglas Gregor <doug.gregor@gmail.com>.
+// Copyright (C) 2004 The Trustees of Indiana University
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//   Authors: Douglas Gregor
+//            Andrew Lumsdaine
+
+// Message Passing Interface 1.1 -- Section 4.9.1. Reduce
+#ifndef BOOST_MPI_REDUCE_HPP
+#define BOOST_MPI_REDUCE_HPP
+
+#include <boost/mpi/exception.hpp>
+#include <boost/mpi/datatype.hpp>
+
+// For (de-)serializing sends and receives
+#include <boost/mpi/packed_oarchive.hpp>
+#include <boost/mpi/packed_iarchive.hpp>
+
+// For packed_[io]archive sends and receives
+#include <boost/mpi/detail/point_to_point.hpp>
+
+#include <boost/mpi/communicator.hpp>
+#include <boost/mpi/environment.hpp>
+#include <boost/mpi/detail/computation_tree.hpp>
+#include <boost/mpi/operations.hpp>
+#include <algorithm>
+#include <exception>
+#include <boost/assert.hpp>
+#include <boost/scoped_array.hpp>
+
+namespace boost { namespace mpi {
+
+
+/************************************************************************
+ * Implementation details                                               *
+ ************************************************************************/
+namespace detail {
+  /**********************************************************************
+   * Simple reduction with MPI_Reduce                                   *
+   **********************************************************************/
+  // We are reducing at the root for a type that has an associated MPI
+  // datatype and operation, so we'll use MPI_Reduce directly.
+  template<typename T, typename Op>
+  void
+  reduce_impl(const communicator& comm, const T* in_values, int n, 
+              T* out_values, Op op, int root, mpl::true_ /*is_mpi_op*/,
+              mpl::true_/*is_mpi_datatype*/)
+  {
+    BOOST_MPI_CHECK_RESULT(MPI_Reduce,
+                           (const_cast<T*>(in_values), out_values, n,
+                            boost::mpi::get_mpi_datatype<T>(*in_values),
+                            (is_mpi_op<Op, T>::op()), root, comm));
+  }
+
+  // We are reducing to the root for a type that has an associated MPI
+  // datatype and operation, so we'll use MPI_Reduce directly.
+  template<typename T, typename Op>
+  void
+  reduce_impl(const communicator& comm, const T* in_values, int n, Op op, 
+              int root, mpl::true_ /*is_mpi_op*/, mpl::true_/*is_mpi_datatype*/)
+  {
+    BOOST_MPI_CHECK_RESULT(MPI_Reduce,
+                           (const_cast<T*>(in_values), 0, n,
+                            boost::mpi::get_mpi_datatype<T>(*in_values),
+                            (is_mpi_op<Op, T>::op()), root, comm));
+  }
+
+  /**********************************************************************
+   * User-defined reduction with MPI_Reduce                             *
+   **********************************************************************/
+
+  // We are reducing at the root for a type that has an associated MPI
+  // datatype but with a custom operation. We'll use MPI_Reduce
+  // directly, but we'll need to create an MPI_Op manually.
+  template<typename T, typename Op>
+  void
+  reduce_impl(const communicator& comm, const T* in_values, int n, 
+              T* out_values, Op op, int root, mpl::false_ /*is_mpi_op*/,
+              mpl::true_/*is_mpi_datatype*/)
+  {
+    user_op<Op, T> mpi_op(op);
+    BOOST_MPI_CHECK_RESULT(MPI_Reduce,
+                           (const_cast<T*>(in_values), out_values, n,
+                            boost::mpi::get_mpi_datatype<T>(*in_values),
+                            mpi_op.get_mpi_op(), root, comm));
+  }
+
+  // We are reducing to the root for a type that has an associated MPI
+  // datatype but with a custom operation. We'll use MPI_Reduce
+  // directly, but we'll need to create an MPI_Op manually.
+  template<typename T, typename Op>
+  void
+  reduce_impl(const communicator& comm, const T* in_values, int n, Op op, 
+              int root, mpl::false_/*is_mpi_op*/, mpl::true_/*is_mpi_datatype*/)
+  {
+    user_op<Op, T> mpi_op(op);
+    BOOST_MPI_CHECK_RESULT(MPI_Reduce,
+                           (const_cast<T*>(in_values), 0, n,
+                            boost::mpi::get_mpi_datatype<T>(*in_values),
+                            mpi_op.get_mpi_op(), root, comm));
+  }
+
+  /**********************************************************************
+   * User-defined, tree-based reduction for non-MPI data types          *
+   **********************************************************************/
+
+  // Commutative reduction
+  template<typename T, typename Op>
+  void
+  tree_reduce_impl(const communicator& comm, const T* in_values, int n,
+                   T* out_values, Op op, int root, 
+                   mpl::true_ /*is_commutative*/)
+  {
+    std::copy(in_values, in_values + n, out_values);
+
+    int size = comm.size();
+    int rank = comm.rank();
+
+    // The computation tree we will use.
+    detail::computation_tree tree(rank, size, root);
+
+    int tag = environment::collectives_tag();
+
+    MPI_Status status;
+    int children = 0;
+    for (int child = tree.child_begin();
+         children < tree.branching_factor() && child != root;
+         ++children, child = (child + 1) % size) {
+      // Receive archive
+      packed_iarchive ia(comm);
+      detail::packed_archive_recv(comm, child, tag, ia, status);
+
+      T incoming;
+      for (int i = 0; i < n; ++i) {
+        ia >> incoming;
+        out_values[i] = op(out_values[i], incoming);
+      }
+    }
+
+    // For non-roots, send the result to the parent.
+    if (tree.parent() != rank) {
+      packed_oarchive oa(comm);
+      for (int i = 0; i < n; ++i)
+        oa << out_values[i];
+      detail::packed_archive_send(comm, tree.parent(), tag, oa);
+    }
+  }
+
+  // Commutative reduction from a non-root.
+  template<typename T, typename Op>
+  void
+  tree_reduce_impl(const communicator& comm, const T* in_values, int n, Op op,
+                   int root, mpl::true_ /*is_commutative*/)
+  {
+    scoped_array<T> results(new T[n]);
+    detail::tree_reduce_impl(comm, in_values, n, results.get(), op, root, 
+                             mpl::true_());
+  }
+
+  // Non-commutative reduction
+  template<typename T, typename Op>
+  void
+  tree_reduce_impl(const communicator& comm, const T* in_values, int n,
+                   T* out_values, Op op, int root, 
+                   mpl::false_ /*is_commutative*/)
+  {
+    int tag = environment::collectives_tag();
+
+    int left_child = root / 2;
+    int right_child = (root + comm.size()) / 2;
+
+    MPI_Status status;
+    if (left_child != root) {
+      // Receive value from the left child and merge it with the value
+      // we had incoming.
+      packed_iarchive ia(comm);
+      detail::packed_archive_recv(comm, left_child, tag, ia, status);
+      T incoming;
+      for (int i = 0; i < n; ++i) {
+        ia >> incoming;
+        out_values[i] = op(incoming, in_values[i]);
+      }
+    } else {
+      // There was no left value, so copy our incoming value.
+      std::copy(in_values, in_values + n, out_values);
+    }
+
+    if (right_child != root) {
+      // Receive value from the right child and merge it with the
+      // value we had incoming.
+      packed_iarchive ia(comm);
+      detail::packed_archive_recv(comm, right_child, tag, ia, status);
+      T incoming;
+      for (int i = 0; i < n; ++i) {
+        ia >> incoming;
+        out_values[i] = op(out_values[i], incoming);
+      }
+    }
+  }
+
+  // Non-commutative reduction from a non-root.
+  template<typename T, typename Op>
+  void
+  tree_reduce_impl(const communicator& comm, const T* in_values, int n, Op op,
+                   int root, mpl::false_ /*is_commutative*/)
+  {
+    int size = comm.size();
+    int rank = comm.rank();
+
+    int tag = environment::collectives_tag();
+
+    // Determine our parents and children in the commutative binary
+    // computation tree.
+    int grandparent = root;
+    int parent = root;
+    int left_bound = 0;
+    int right_bound = size;
+    int left_child, right_child;
+    do {
+      left_child = (left_bound + parent) / 2;
+      right_child = (parent + right_bound) / 2;
+
+      if (rank < parent) {
+        // Go left.
+        grandparent = parent;
+        right_bound = parent;
+        parent = left_child;
+      } else if (rank > parent) {
+        // Go right.
+        grandparent = parent;
+        left_bound = parent + 1;
+        parent = right_child;
+      } else {
+        // We've found the parent
+        break;
+      }
+    } while (true);
+
+    // Our parent is the grandparent of our children. This is a slight
+    // abuse of notation, but it makes the send-to-parent below make
+    // more sense.
+    parent = grandparent;
+
+    MPI_Status status;
+    scoped_array<T> out_values(new T[n]);
+    if (left_child != rank) {
+      // Receive value from the left child and merge it with the value
+      // we had incoming.
+      packed_iarchive ia(comm);
+      detail::packed_archive_recv(comm, left_child, tag, ia, status);
+      T incoming;
+      for (int i = 0; i < n; ++i) {
+        ia >> incoming;
+        out_values[i] = op(incoming, in_values[i]);
+      }
+    } else {
+      // There was no left value, so copy our incoming value.
+      std::copy(in_values, in_values + n, out_values.get());
+    }
+
+    if (right_child != rank) {
+      // Receive value from the right child and merge it with the
+      // value we had incoming.
+      packed_iarchive ia(comm);
+      detail::packed_archive_recv(comm, right_child, tag, ia, status);
+      T incoming;
+      for (int i = 0; i < n; ++i) {
+        ia >> incoming;
+        out_values[i] = op(out_values[i], incoming);
+      }
+    }
+
+    // Send the combined value to our parent.
+    packed_oarchive oa(comm);
+    for (int i = 0; i < n; ++i)
+      oa << out_values[i];
+    detail::packed_archive_send(comm, parent, tag, oa);
+  }
+
+  // We are reducing at the root for a type that has no associated MPI
+  // datatype and operation, so we'll use a simple tree-based
+  // algorithm.
+  template<typename T, typename Op>
+  void
+  reduce_impl(const communicator& comm, const T* in_values, int n, 
+              T* out_values, Op op, int root, mpl::false_ /*is_mpi_op*/,
+              mpl::false_ /*is_mpi_datatype*/)
+  {
+    detail::tree_reduce_impl(comm, in_values, n, out_values, op, root,
+                             is_commutative<Op, T>());
+  }
+
+  // We are reducing to the root for a type that has no associated MPI
+  // datatype and operation, so we'll use a simple tree-based
+  // algorithm.
+  template<typename T, typename Op>
+  void
+  reduce_impl(const communicator& comm, const T* in_values, int n, Op op, 
+              int root, mpl::false_ /*is_mpi_op*/, 
+              mpl::false_ /*is_mpi_datatype*/)
+  {
+    detail::tree_reduce_impl(comm, in_values, n, op, root,
+                             is_commutative<Op, T>());
+  }
+} // end namespace detail
+
+template<typename T, typename Op>
+void
+reduce(const communicator& comm, const T* in_values, int n, T* out_values, 
+       Op op, int root)
+{
+  if (comm.rank() == root)
+    detail::reduce_impl(comm, in_values, n, out_values, op, root,
+                        is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+  else
+    detail::reduce_impl(comm, in_values, n, op, root,
+                        is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+}
+
+template<typename T, typename Op>
+void 
+reduce(const communicator& comm, const T* in_values, int n, Op op, int root)
+{
+  BOOST_ASSERT(comm.rank() != root);
+
+  detail::reduce_impl(comm, in_values, n, op, root,
+                      is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+}
+
+template<typename T, typename Op>
+void
+reduce(const communicator& comm, const T& in_value, T& out_value, Op op,
+       int root)
+{
+  if (comm.rank() == root)
+    detail::reduce_impl(comm, &in_value, 1, &out_value, op, root,
+                        is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+  else
+    detail::reduce_impl(comm, &in_value, 1, op, root,
+                        is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+}
+
+template<typename T, typename Op>
+void reduce(const communicator& comm, const T& in_value, Op op, int root)
+{
+  BOOST_ASSERT(comm.rank() != root);
+
+  detail::reduce_impl(comm, &in_value, 1, op, root,
+                      is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+}
+
+} } // end namespace boost::mpi
+
+#endif // BOOST_MPI_REDUCE_HPP

test/external/boost/mpi/collectives/scan.hpp

@@ -0,0 +1,168 @@
+// Copyright (C) 2005-2006 Douglas Gregor <doug.gregor@gmail.com>.
+// Copyright (C) 2004 The Trustees of Indiana University
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//   Authors: Douglas Gregor
+//            Andrew Lumsdaine
+
+// Message Passing Interface 1.1 -- Section 4.9.1. Scan
+#ifndef BOOST_MPI_SCAN_HPP
+#define BOOST_MPI_SCAN_HPP
+
+#include <boost/mpi/exception.hpp>
+#include <boost/mpi/datatype.hpp>
+
+// For (de-)serializing sends and receives
+#include <boost/mpi/packed_oarchive.hpp>
+#include <boost/mpi/packed_iarchive.hpp>
+
+// For packed_[io]archive sends and receives
+#include <boost/mpi/detail/point_to_point.hpp>
+
+#include <boost/mpi/communicator.hpp>
+#include <boost/mpi/environment.hpp>
+#include <boost/mpi/detail/computation_tree.hpp>
+#include <boost/mpi/operations.hpp>
+#include <algorithm>
+#include <exception>
+#include <boost/assert.hpp>
+
+namespace boost { namespace mpi {
+
+
+/************************************************************************
+ * Implementation details                                               *
+ ************************************************************************/
+namespace detail {
+  /**********************************************************************
+   * Simple prefix reduction with MPI_Scan                              *
+   **********************************************************************/
+
+  // We are performing prefix reduction for a type that has an
+  // associated MPI datatype and operation, so we'll use MPI_Scan
+  // directly.
+  template<typename T, typename Op>
+  void
+  scan_impl(const communicator& comm, const T* in_values, int n, T* out_values,
+            Op op, mpl::true_ /*is_mpi_op*/, mpl::true_ /*is_mpi_datatype*/)
+  {
+    BOOST_MPI_CHECK_RESULT(MPI_Scan,
+                           (const_cast<T*>(in_values), out_values, n,
+                            boost::mpi::get_mpi_datatype<T>(*in_values),
+                            (is_mpi_op<Op, T>::op()), comm));
+  }
+
+  /**********************************************************************
+   * User-defined prefix reduction with MPI_Scan                        *
+   **********************************************************************/
+
+  // We are performing prefix reduction for a type that has an
+  // associated MPI datatype but with a custom operation. We'll use
+  // MPI_Scan directly, but we'll need to create an MPI_Op manually.
+  template<typename T, typename Op>
+  void
+  scan_impl(const communicator& comm, const T* in_values, int n, T* out_values,
+            Op op, mpl::false_ /*is_mpi_op*/, mpl::true_ /*is_mpi_datatype*/)
+  {
+    user_op<Op, T> mpi_op(op);
+    BOOST_MPI_CHECK_RESULT(MPI_Scan,
+                           (const_cast<T*>(in_values), out_values, n,
+                            boost::mpi::get_mpi_datatype<T>(*in_values),
+                            mpi_op.get_mpi_op(), comm));
+  }
+
+  /**********************************************************************
+   * User-defined, tree-based reduction for non-MPI data types          *
+   **********************************************************************/
+
+  template<typename T, typename Op>
+  void
+  upper_lower_scan(const communicator& comm, const T* in_values, int n,
+                   T* out_values, Op& op, int lower, int upper)
+  {
+    int tag = environment::collectives_tag();
+    int rank = comm.rank();
+
+    if (lower + 1 == upper) {
+      std::copy(in_values, in_values + n, out_values);
+    } else {
+      int middle = (lower + upper) / 2;
+      
+      if (rank < middle) {
+        // Lower half
+        upper_lower_scan(comm, in_values, n, out_values, op, lower, middle);
+
+        // If we're the last process in the lower half, send our values
+        // to everyone in the upper half.
+        if (rank == middle - 1) {
+          packed_oarchive oa(comm);
+          for (int i = 0; i < n; ++i)
+            oa << out_values[i];
+
+          for (int p = middle; p < upper; ++p)
+            comm.send(p, tag, oa);
+        }
+      } else {
+        // Upper half
+        upper_lower_scan(comm, in_values, n, out_values, op, middle, upper);
+
+        // Receive value from the last process in the lower half.
+        packed_iarchive ia(comm);
+        comm.recv(middle - 1, tag, ia);
+
+        // Combine value that came from the left with our value
+        T left_value;
+        for (int i = 0; i < n; ++i)
+          {
+            ia >> left_value;
+            out_values[i] = op(left_value, out_values[i]);
+          }
+      }
+    }
+  }
+
+  // We are performing prefix reduction for a type that has no
+  // associated MPI datatype and operation, so we'll use a simple
+  // upper/lower algorithm.
+  template<typename T, typename Op>
+  inline void
+  scan_impl(const communicator& comm, const T* in_values, int n, T* out_values, 
+            Op op, mpl::false_ /*is_mpi_op*/, mpl::false_/*is_mpi_datatype*/)
+  {
+    upper_lower_scan(comm, in_values, n, out_values, op, 0, comm.size());
+  }
+} // end namespace detail
+
+
+template<typename T, typename Op>
+inline void
+scan(const communicator& comm, const T& in_value, T& out_value, Op op)
+{
+  detail::scan_impl(comm, &in_value, 1, &out_value, op, 
+                    is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+}
+
+template<typename T, typename Op>
+inline void
+scan(const communicator& comm, const T* in_values, int n, T* out_values, Op op)
+{
+  detail::scan_impl(comm, in_values, n, out_values, op, 
+                    is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+}
+
+template<typename T, typename Op>
+inline T
+scan(const communicator& comm, const T& in_value, Op op)
+{
+  T out_value;
+  detail::scan_impl(comm, &in_value, 1, &out_value, op, 
+                    is_mpi_op<Op, T>(), is_mpi_datatype<T>());
+  return out_value;
+}
+
+} } // end namespace boost::mpi
+
+#endif // BOOST_MPI_SCAN_HPP

test/external/boost/mpi/collectives/scatter.hpp

@@ -0,0 +1,161 @@
+// Copyright (C) 2005, 2006 Douglas Gregor.
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// Message Passing Interface 1.1 -- Section 4.6. Scatter
+#ifndef BOOST_MPI_SCATTER_HPP
+#define BOOST_MPI_SCATTER_HPP
+
+#include <boost/mpi/exception.hpp>
+#include <boost/mpi/datatype.hpp>
+#include <vector>
+#include <boost/mpi/packed_oarchive.hpp>
+#include <boost/mpi/packed_iarchive.hpp>
+#include <boost/mpi/detail/point_to_point.hpp>
+#include <boost/mpi/communicator.hpp>
+#include <boost/mpi/environment.hpp>
+#include <boost/assert.hpp>
+
+namespace boost { namespace mpi {
+
+namespace detail {
+  // We're scattering from the root for a type that has an associated MPI
+  // datatype, so we'll use MPI_Scatter to do all of the work.
+  template<typename T>
+  void
+  scatter_impl(const communicator& comm, const T* in_values, T* out_values, 
+               int n, int root, mpl::true_)
+  {
+    MPI_Datatype type = get_mpi_datatype<T>(*in_values);
+    BOOST_MPI_CHECK_RESULT(MPI_Scatter,
+                           (const_cast<T*>(in_values), n, type,
+                            out_values, n, type, root, comm));
+  }
+
+  // We're scattering from a non-root for a type that has an associated MPI
+  // datatype, so we'll use MPI_Scatter to do all of the work.
+  template<typename T>
+  void
+  scatter_impl(const communicator& comm, T* out_values, int n, int root, 
+               mpl::true_)
+  {
+    MPI_Datatype type = get_mpi_datatype<T>(*out_values);
+    BOOST_MPI_CHECK_RESULT(MPI_Scatter,
+                           (0, n, type,
+                            out_values, n, type,
+                            root, comm));
+  }
+
+  // We're scattering from the root for a type that does not have an
+  // associated MPI datatype, so we'll need to serialize
+  // it. Unfortunately, this means that we cannot use MPI_Scatter, so
+  // we'll just have the root send individual messages to the other
+  // processes.
+  template<typename T>
+  void
+  scatter_impl(const communicator& comm, const T* in_values, T* out_values, 
+               int n, int root, mpl::false_)
+  {
+    int tag = environment::collectives_tag();
+    int size = comm.size();
+
+    for (int dest = 0; dest < size; ++dest) {
+      if (dest == root) {
+        // Our own values will never be transmitted: just copy them.
+        std::copy(in_values + dest * n, in_values + (dest + 1) * n, out_values);
+      } else {
+        // Send archive
+        packed_oarchive oa(comm);
+        for (int i = 0; i < n; ++i)
+          oa << in_values[dest * n + i];
+        detail::packed_archive_send(comm, dest, tag, oa);
+      }
+    }
+  }
+
+  // We're scattering to a non-root for a type that does not have an
+  // associated MPI datatype, so we'll need to de-serialize
+  // it. Unfortunately, this means that we cannot use MPI_Scatter, so
+  // we'll just have all of the non-root nodes send individual
+  // messages to the root.
+  template<typename T>
+  void
+  scatter_impl(const communicator& comm, T* out_values, int n, int root, 
+               mpl::false_)
+  {
+    int tag = environment::collectives_tag();
+
+    packed_iarchive ia(comm);
+    MPI_Status status;
+    detail::packed_archive_recv(comm, root, tag, ia, status);
+    for (int i = 0; i < n; ++i)
+      ia >> out_values[i];
+  }
+} // end namespace detail
+
+template<typename T>
+void
+scatter(const communicator& comm, const T* in_values, T& out_value, int root)
+{
+  if (comm.rank() == root)
+    detail::scatter_impl(comm, in_values, &out_value, 1, root, 
+                         is_mpi_datatype<T>());
+  else
+    detail::scatter_impl(comm, &out_value, 1, root, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void
+scatter(const communicator& comm, const std::vector<T>& in_values, T& out_value,
+        int root)
+{
+  if (comm.rank() == root)
+    ::boost::mpi::scatter<T>(comm, &in_values[0], out_value, root);
+  else
+    ::boost::mpi::scatter<T>(comm, static_cast<const T*>(0), out_value, 
+                             root);
+}
+
+template<typename T>
+void scatter(const communicator& comm, T& out_value, int root)
+{
+  BOOST_ASSERT(comm.rank() != root);
+  detail::scatter_impl(comm, &out_value, 1, root, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void
+scatter(const communicator& comm, const T* in_values, T* out_values, int n,
+        int root)
+{
+  if (comm.rank() == root)
+    detail::scatter_impl(comm, in_values, out_values, n, root,
+                         is_mpi_datatype<T>());
+  else
+    detail::scatter_impl(comm, out_values, n, root, is_mpi_datatype<T>());
+}
+
+template<typename T>
+void
+scatter(const communicator& comm, const std::vector<T>& in_values, 
+        T* out_values, int n, int root)
+{
+  if (comm.rank() == root)
+    ::boost::mpi::scatter(comm, &in_values[0], out_values, n, root);
+  else
+    ::boost::mpi::scatter(comm, static_cast<const T*>(0), out_values, 
+                                    n, root);
+}
+
+template<typename T>
+void scatter(const communicator& comm, T* out_values, int n, int root)
+{
+  BOOST_ASSERT(comm.rank() != root);
+  detail::scatter_impl(comm, out_values, n, root, is_mpi_datatype<T>());
+}
+
+} } // end namespace boost::mpi
+
+#endif // BOOST_MPI_SCATTER_HPP