C++ (Cpp) command_queue::enqueue_write_buffer_async Examples

Example #1

File: copy_to_device.hpp Project: boostorg/compute

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

    size_t count = iterator_range_size(first, last);
    if(count == 0){
        return future<DeviceIterator>();
    }

    size_t offset = result.get_index();

    event event_ =
        queue.enqueue_write_buffer_async(result.get_buffer(),
                                         offset * sizeof(value_type),
                                         count * sizeof(value_type),
                                         ::boost::addressof(*first),
                                         events);

    return make_future(result + static_cast<difference_type>(count), event_);
}