/usr/include/boost/mpi/collectives/broadcast.hpp is in libboost1.46-dev 1.46.1-7ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | // 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
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