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#include <unittest/unittest.h>
#include <thrust/sort.h>
#include <thrust/execution_policy.h>
template<typename ExecutionPolicy, typename Iterator, typename Iterator2>
__global__
void is_sorted_kernel(ExecutionPolicy exec, Iterator first, Iterator last, Iterator2 result)
{
*result = thrust::is_sorted(exec, first, last);
}
template<typename ExecutionPolicy>
void TestIsSortedDevice(ExecutionPolicy exec)
{
size_t n = 1000;
thrust::device_vector<int> v = unittest::random_integers<int>(n);
thrust::device_vector<bool> result(1);
v[0] = 1;
v[1] = 0;
is_sorted_kernel<<<1,1>>>(exec, v.begin(), v.end(), result.begin());
{
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
}
ASSERT_EQUAL(false, result[0]);
thrust::sort(v.begin(), v.end());
is_sorted_kernel<<<1,1>>>(exec, v.begin(), v.end(), result.begin());
{
cudaError_t const err = cudaDeviceSynchronize();
ASSERT_EQUAL(cudaSuccess, err);
}
ASSERT_EQUAL(true, result[0]);
}
void TestIsSortedDeviceSeq()
{
TestIsSortedDevice(thrust::seq);
}
DECLARE_UNITTEST(TestIsSortedDeviceSeq);
void TestIsSortedDeviceDevice()
{
TestIsSortedDevice(thrust::device);
}
DECLARE_UNITTEST(TestIsSortedDeviceDevice);
void TestIsSortedCudaStreams()
{
thrust::device_vector<int> v(4);
v[0] = 0; v[1] = 5; v[2] = 8; v[3] = 0;
cudaStream_t s;
cudaStreamCreate(&s);
ASSERT_EQUAL(thrust::is_sorted(thrust::cuda::par.on(s), v.begin(), v.begin() + 0), true);
ASSERT_EQUAL(thrust::is_sorted(thrust::cuda::par.on(s), v.begin(), v.begin() + 1), true);
// the following line crashes gcc 4.3
#if (__GNUC__ == 4) && (__GNUC_MINOR__ == 3)
// do nothing
#else
// compile this line on other compilers
ASSERT_EQUAL(thrust::is_sorted(thrust::cuda::par.on(s), v.begin(), v.begin() + 2), true);
#endif // GCC
ASSERT_EQUAL(thrust::is_sorted(thrust::cuda::par.on(s), v.begin(), v.begin() + 3), true);
ASSERT_EQUAL(thrust::is_sorted(thrust::cuda::par.on(s), v.begin(), v.begin() + 4), false);
ASSERT_EQUAL(thrust::is_sorted(thrust::cuda::par.on(s), v.begin(), v.begin() + 3, thrust::less<int>()), true);
ASSERT_EQUAL(thrust::is_sorted(thrust::cuda::par.on(s), v.begin(), v.begin() + 1, thrust::greater<int>()), true);
ASSERT_EQUAL(thrust::is_sorted(thrust::cuda::par.on(s), v.begin(), v.begin() + 4, thrust::greater<int>()), false);
ASSERT_EQUAL(thrust::is_sorted(thrust::cuda::par.on(s), v.begin(), v.end()), false);
cudaStreamDestroy(s);
}
DECLARE_UNITTEST(TestIsSortedCudaStreams);
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