64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
// Copyright (C) 2005-2006 Alain Miniussi <alain.miniussi -at- oca.eu>.
|
|
|
|
// 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. MPI Collectives
|
|
|
|
/** @file inplace.hpp
|
|
*
|
|
* This header provides helpers to indicate to MPI collective operation
|
|
* that a buffer can be use both as an input and output.
|
|
*/
|
|
#ifndef BOOST_MPI_INPLACE_HPP
|
|
#define BOOST_MPI_INPLACE_HPP
|
|
|
|
#include <boost/mpi/communicator.hpp>
|
|
#include <vector>
|
|
|
|
namespace boost { namespace mpi {
|
|
|
|
/**
|
|
* @brief Wrapper type to explicitly indicate that a input data
|
|
* can be overriden with an output value.
|
|
*/
|
|
template <typename T>
|
|
struct inplace_t {
|
|
inplace_t(T& inout) : buffer(inout) {}
|
|
T& buffer;
|
|
};
|
|
|
|
template <typename T>
|
|
struct inplace_t<T*> {
|
|
inplace_t(T* inout) : buffer(inout) {}
|
|
T* buffer;
|
|
};
|
|
|
|
|
|
/**
|
|
* @brief Wrapp a input data to indicate that it can be overriden
|
|
* with an ouput value.
|
|
* @param inout the contributing input value, it will be overriden
|
|
* with the output value where one is expected. If it is a pointer,
|
|
* the number of elements will be provided separatly.
|
|
* @returns The wrapped value or pointer.
|
|
*/
|
|
template<typename T>
|
|
inplace_t<T>
|
|
inplace(T& inout) {
|
|
return inplace_t<T>(inout);
|
|
}
|
|
/**
|
|
* \overload
|
|
*/
|
|
template<typename T>
|
|
inplace_t<T*>
|
|
inplace(T* inout) {
|
|
return inplace_t<T*>(inout);
|
|
}
|
|
} } // end namespace boost::mpi
|
|
|
|
#endif // BOOST_MPI_INPLACE_HPP
|
|
|