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#pragma once

#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_HCC
#include <thrust/system/hip/config.h>

#include <thrust/distance.h>
#include <thrust/system/hip/detail/reduce.h>
#include <thrust/system/hip/detail/util.h>

BEGIN_NS_THRUST
namespace hip_rocprim
{

template <class Derived, class InputIt, class UnaryPred>
typename iterator_traits<InputIt>::difference_type THRUST_HIP_FUNCTION
count_if(execution_policy<Derived>& policy,
         InputIt                    first,
         InputIt                    last,
         UnaryPred                  unary_pred)
{
    typedef typename iterator_traits<InputIt>::difference_type        size_type;
    typedef transform_input_iterator_t<size_type, InputIt, UnaryPred> flag_iterator_t;

    return hip_rocprim::reduce_n(policy,
                                 flag_iterator_t(first, unary_pred),
                                 thrust::distance(first, last),
                                 size_type(0),
                                 plus<size_type>());
}

template <class Derived, class InputIt, class Value>
typename iterator_traits<InputIt>::difference_type THRUST_HIP_FUNCTION
count(execution_policy<Derived>& policy,
      InputIt                    first,
      InputIt                    last,
      Value const&               value)
{
    return hip_rocprim::count_if(
        policy, first, last, detail::equal_to_value<Value>(value)
    );
}

} // namespace hip_rocprim
END_NS_THRUST
#endif