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#include <thrust/execution_policy.h>
#include <thrust/transform_reduce.h>
#include <unittest/unittest.h>
#ifdef THRUST_TEST_DEVICE_SIDE
template <typename ExecutionPolicy, typename Iterator1, typename Function1, typename T, typename Function2, typename Iterator2>
__global__ void transform_reduce_kernel(
ExecutionPolicy exec, Iterator1 first, Iterator1 last, Function1 f1, T init, Function2 f2, Iterator2 result)
{
*result = thrust::transform_reduce(exec, first, last, f1, init, f2);
}
template <typename ExecutionPolicy>
void TestTransformReduceDevice(ExecutionPolicy exec)
{
typedef thrust::device_vector<int> Vector;
typedef typename Vector::value_type T;
Vector data(3);
data[0] = 1;
data[1] = -2;
data[2] = 3;
T init = 10;
thrust::device_vector<T> result(1);
transform_reduce_kernel<<<1, 1>>>(
exec, data.begin(), data.end(), thrust::negate<T>(), init, thrust::plus<T>(), result.begin());
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
ASSERT_EQUAL(8, (T) result[0]);
}
void TestTransformReduceDeviceSeq()
{
TestTransformReduceDevice(thrust::seq);
}
DECLARE_UNITTEST(TestTransformReduceDeviceSeq);
void TestTransformReduceDeviceDevice()
{
TestTransformReduceDevice(thrust::device);
}
DECLARE_UNITTEST(TestTransformReduceDeviceDevice);
#endif
void TestTransformReduceCudaStreams()
{
typedef thrust::device_vector<int> Vector;
typedef Vector::value_type T;
Vector data(3);
data[0] = 1;
data[1] = -2;
data[2] = 3;
T init = 10;
cudaStream_t s;
cudaStreamCreate(&s);
T result = thrust::transform_reduce(
thrust::cuda::par.on(s), data.begin(), data.end(), thrust::negate<T>(), init, thrust::plus<T>());
cudaStreamSynchronize(s);
ASSERT_EQUAL(8, result);
cudaStreamDestroy(s);
}
DECLARE_UNITTEST(TestTransformReduceCudaStreams);
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