C++ (Cpp) command_queue::enqueue_copy_bufferの例

コード例 #1

ファイル: copy.hpp プロジェクト: OHDSI/RcppBoostCompute

inline future<OutputIterator>
dispatch_copy_async(InputIterator first,
                    InputIterator last,
                    OutputIterator result,
                    command_queue &queue,
                    typename boost::enable_if<
                        mpl::and_<
                            is_device_iterator<InputIterator>,
                            is_device_iterator<OutputIterator>,
                            can_copy_with_copy_buffer<
                                InputIterator, OutputIterator
                            >
                        >
                    >::type* = 0)
{
    typedef typename std::iterator_traits<InputIterator>::value_type value_type;
    typedef typename std::iterator_traits<InputIterator>::difference_type difference_type;

    difference_type n = std::distance(first, last);
    if(n < 1){
        // nothing to copy
        return make_future(result, event());
    }

    event event_ =
        queue.enqueue_copy_buffer(
            first.get_buffer(),
            result.get_buffer(),
            first.get_index() * sizeof(value_type),
            result.get_index() * sizeof(value_type),
            static_cast<size_t>(n) * sizeof(value_type)
        );

    return make_future(result + n, event_);
}

コード例 #2

ファイル: copy.hpp プロジェクト: Quanteek/compute

inline OutputIterator
dispatch_copy(InputIterator first,
              InputIterator last,
              OutputIterator result,
              command_queue &queue,
              typename boost::enable_if_c<
                  boost::is_same<
                      InputIterator,
                      buffer_iterator<typename InputIterator::value_type>
                  >::value &&
                  boost::is_same<
                      OutputIterator,
                      buffer_iterator<typename OutputIterator::value_type>
                  >::value &&
                  boost::is_same<
                      typename InputIterator::value_type,
                      typename OutputIterator::value_type
                  >::value
              >::type* = 0)
{
    typedef typename std::iterator_traits<InputIterator>::value_type value_type;
    typedef typename std::iterator_traits<InputIterator>::difference_type difference_type;

    difference_type n = std::distance(first, last);
    if(n < 1){
        // nothing to copy
        return first;
    }

    queue.enqueue_copy_buffer(first.get_buffer(),
                              result.get_buffer(),
                              first.get_index() * sizeof(value_type),
                              result.get_index() * sizeof(value_type),
                              static_cast<size_t>(n) * sizeof(value_type));
    return result + n;
}