queries.h

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 * Copyright 2008-2011  Marius Muja (mariusm@cs.ubc.ca). All rights reserved.
 * Copyright 2008-2011  David G. Lowe (lowe@cs.ubc.ca). All rights reserved.
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#ifndef MPI_QUERIES_H_
#define MPI_QUERIES_H_
 
#include <FLANN/mpi/matrix.h>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/archive/binary_oarchive.hpp>
#include <boost/asio.hpp>
 
namespace flann
{
 
template<typename T>
struct Request
{
    flann::Matrix<T> queries;
    int nn;
    int checks;
 
    template<typename Archive>
    void serialize(Archive& ar, const unsigned int version)
    {
        ar & queries & nn & checks;
    }
};
 
template<typename T>
struct Response
{
    flann::Matrix<int> indices;
    flann::Matrix<T> dists;
 
    template<typename Archive>
    void serialize(Archive& ar, const unsigned int version)
    {
        ar & indices & dists;
    }
};
 
 
using boost::asio::ip::tcp;
 
template <typename T>
void read_object(tcp::socket& sock, T& val)
{
    uint32_t size;
    boost::asio::read(sock, boost::asio::buffer(&size, sizeof(size)));
    size = ntohl(size);
 
    boost::asio::streambuf archive_stream;
    boost::asio::read(sock, archive_stream, boost::asio::transfer_at_least(size));
 
    boost::archive::binary_iarchive archive(archive_stream);
    archive >> val;
}
 
template <typename T>
void write_object(tcp::socket& sock, const T& val)
{
    boost::asio::streambuf archive_stream;
    boost::archive::binary_oarchive archive(archive_stream);
    archive << val;
 
    uint32_t size = archive_stream.size();
    size = htonl(size);
    boost::asio::write(sock, boost::asio::buffer(&size, sizeof(size)));
    boost::asio::write(sock, archive_stream);
 
}
 
}
 
 
 
#endif /* MPI_QUERIES_H_ */