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#include <thrust/scan.h>
#include <thrust/transform.h>
#include <thrust/tuple.h>
#include <unittest/unittest.h>
#if THRUST_DEVICE_SYSTEM == THRUST_DEVICE_SYSTEM_CUDA
# include <unittest/cuda/testframework.h>
#endif
using namespace unittest;
struct SumTupleFunctor
{
template <typename Tuple>
_CCCL_HOST_DEVICE Tuple operator()(const Tuple& lhs, const Tuple& rhs)
{
using thrust::get;
return thrust::make_tuple(get<0>(lhs) + get<0>(rhs), get<1>(lhs) + get<1>(rhs));
}
};
struct MakeTupleFunctor
{
template <typename T1, typename T2>
_CCCL_HOST_DEVICE thrust::tuple<T1, T2> operator()(T1& lhs, T2& rhs)
{
return thrust::make_tuple(lhs, rhs);
}
};
template <typename T>
struct TestTupleScan
{
void operator()(const size_t n)
{
using namespace thrust;
host_vector<T> h_t1 = unittest::random_integers<T>(n);
host_vector<T> h_t2 = unittest::random_integers<T>(n);
// initialize input
host_vector<tuple<T, T>> h_input(n);
transform(h_t1.begin(), h_t1.end(), h_t2.begin(), h_input.begin(), MakeTupleFunctor());
device_vector<tuple<T, T>> d_input = h_input;
// allocate output
tuple<T, T> zero(0, 0);
host_vector<tuple<T, T>> h_output(n, zero);
device_vector<tuple<T, T>> d_output(n, zero);
// inclusive_scan
inclusive_scan(h_input.begin(), h_input.end(), h_output.begin(), SumTupleFunctor());
inclusive_scan(d_input.begin(), d_input.end(), d_output.begin(), SumTupleFunctor());
ASSERT_EQUAL_QUIET(h_output, d_output);
// exclusive_scan
tuple<T, T> init(13, 17);
exclusive_scan(h_input.begin(), h_input.end(), h_output.begin(), init, SumTupleFunctor());
exclusive_scan(d_input.begin(), d_input.end(), d_output.begin(), init, SumTupleFunctor());
ASSERT_EQUAL_QUIET(h_output, d_output);
}
};
VariableUnitTest<TestTupleScan, IntegralTypes> TestTupleScanInstance;
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