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//---------------------------------------------------------------------------//
// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
//
// Distributed under 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
//
// See http://boostorg.github.com/compute for more information.
//---------------------------------------------------------------------------//
#ifndef BOOST_COMPUTE_ALGORITHM_COPY_N_HPP
#define BOOST_COMPUTE_ALGORITHM_COPY_N_HPP
#include <boost/compute/system.hpp>
#include <boost/compute/command_queue.hpp>
#include <boost/compute/algorithm/copy.hpp>
namespace boost {
namespace compute {
/// Copies \p count elements from \p first to \p result.
///
/// For example, to copy four values from the host to the device:
/// \code
/// // values on the host and vector on the device
/// float values[4] = { 1.f, 2.f, 3.f, 4.f };
/// boost::compute::vector<float> vec(4, context);
///
/// // copy from the host to the device
/// boost::compute::copy_n(values, 4, vec.begin(), queue);
/// \endcode
///
/// Space complexity: \Omega(1)
///
/// \see copy()
template<class InputIterator, class Size, class OutputIterator>
inline OutputIterator copy_n(InputIterator first,
Size count,
OutputIterator result,
command_queue &queue = system::default_queue(),
const wait_list &events = wait_list())
{
typedef typename std::iterator_traits<InputIterator>::difference_type difference_type;
return ::boost::compute::copy(first,
first + static_cast<difference_type>(count),
result,
queue,
events);
}
} // end compute namespace
} // end boost namespace
#endif // BOOST_COMPUTE_ALGORITHM_COPY_N_HPP