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#include <unittest/unittest.h>
#include <thrust/pair.h>
#include <thrust/sort.h>
#include <thrust/execution_policy.h>
#ifdef THRUST_TEST_DEVICE_SIDE
template<typename ExecutionPolicy, typename Iterator>
__global__
void stable_sort_kernel(ExecutionPolicy exec, Iterator first, Iterator last)
{
thrust::stable_sort(exec, first, last);
}
struct make_pair_functor
{
template<typename T1, typename T2>
__host__ __device__
thrust::pair<T1,T2> operator()(const T1 &x, const T2 &y)
{
return thrust::make_pair(x,y);
} // end operator()()
}; // end make_pair_functor
template<typename ExecutionPolicy>
void TestPairStableSortDevice(ExecutionPolicy exec)
{
size_t n = 10000;
typedef thrust::pair<int,int> P;
thrust::host_vector<int> h_p1 = unittest::random_integers<int>(n);
thrust::host_vector<int> h_p2 = unittest::random_integers<int>(n);
thrust::host_vector<P> h_pairs(n);
// zip up pairs on the host
thrust::transform(h_p1.begin(), h_p1.end(), h_p2.begin(), h_pairs.begin(), make_pair_functor());
thrust::device_vector<P> d_pairs = h_pairs;
stable_sort_kernel<<<1,1>>>(exec, d_pairs.begin(), d_pairs.end());
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
// sort on the host
thrust::stable_sort(h_pairs.begin(), h_pairs.end());
ASSERT_EQUAL_QUIET(h_pairs, d_pairs);
};
void TestPairStableSortDeviceSeq()
{
TestPairStableSortDevice(thrust::seq);
}
DECLARE_UNITTEST(TestPairStableSortDeviceSeq);
void TestPairStableSortDeviceDevice()
{
TestPairStableSortDevice(thrust::device);
}
DECLARE_UNITTEST(TestPairStableSortDeviceDevice);
#endif
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