Function copy_to_host

include/boost/compute/algorithm/detail/copy_to_host.hpp:29–54

template<class DeviceIterator, class HostIterator>
inline HostIterator copy_to_host(DeviceIterator first,
                                 DeviceIterator last,
                                 HostIterator result,
                                 command_queue &queue,
                                 const wait_list &events)
{
    typedef typename
        std::iterator_traits<DeviceIterator>::value_type
        value_type;

    size_t count = iterator_range_size(first, last);
    if(count == 0){
        return result;
    }

    const buffer &buffer = first.get_buffer();
    size_t offset = first.get_index();

    queue.enqueue_read_buffer(buffer,
                              offset * sizeof(value_type),
                              count * sizeof(value_type),
                              ::boost::addressof(*result),
                              events);

    return iterator_plus_distance(result, count);
}

template<class DeviceIterator, class HostIterator>
inline HostIterator copy_to_host_map(DeviceIterator first,