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_);
}
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;
}