opm-simulators/tests/gpuistl/test_smart_pointers.cu

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/*
Copyright 2025 Equinor ASA
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OPM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#define BOOST_TEST_MODULE TestSmartPointers
#include <boost/test/unit_test.hpp>
#include <opm/simulators/linalg/gpuistl/gpu_smart_pointer.hpp>
namespace
{
struct SomeStruct {
__device__ void someFunction()
{
this->isCalled = true;
}
bool isCalled = false;
};
template <class T>
__global__ void
setValue(Opm::gpuistl::PointerView<T> ptrIn, Opm::gpuistl::PointerView<T> ptrOut)
{
*ptrOut = *ptrIn;
}
template <class T>
__global__ void
setValueGet(Opm::gpuistl::PointerView<T> ptrIn, Opm::gpuistl::PointerView<T> ptrOut)
{
*ptrOut.get() = *ptrIn.get();
}
template <class T>
__global__ void
callFunction(Opm::gpuistl::PointerView<T> ptrIn)
{
ptrIn->someFunction();
}
} // namespace
BOOST_AUTO_TEST_CASE(TestSharedPointer)
{
auto sharedPtr = Opm::gpuistl::make_gpu_shared_ptr<int>(1);
int valueFromDevice = 0;
OPM_GPU_SAFE_CALL(cudaMemcpy(&valueFromDevice, sharedPtr.get(), sizeof(int), cudaMemcpyDeviceToHost));
BOOST_CHECK_EQUAL(valueFromDevice, 1);
}
BOOST_AUTO_TEST_CASE(TestUniquePointer)
{
auto uniquePtr = Opm::gpuistl::make_gpu_unique_ptr<int>(1);
int valueFromDevice = 0;
OPM_GPU_SAFE_CALL(cudaMemcpy(&valueFromDevice, uniquePtr.get(), sizeof(int), cudaMemcpyDeviceToHost));
BOOST_CHECK_EQUAL(valueFromDevice, 1);
}
BOOST_AUTO_TEST_CASE(TestPointerView)
{
auto pointerDestination = Opm::gpuistl::make_gpu_shared_ptr<double>(92);
auto pointerSource = Opm::gpuistl::make_gpu_shared_ptr<double>(128.5);
setValue<<<1, 1>>>(Opm::gpuistl::make_view(pointerSource), Opm::gpuistl::make_view(pointerDestination));
double valueFromDevice = 0;
OPM_GPU_SAFE_CALL(cudaMemcpy(&valueFromDevice, pointerDestination.get(), sizeof(double), cudaMemcpyDeviceToHost));
BOOST_CHECK_EQUAL(valueFromDevice, 128.5);
auto newSource = Opm::gpuistl::make_gpu_shared_ptr<double>(-1.0);
setValueGet<<<1, 1>>>(Opm::gpuistl::make_view(newSource), Opm::gpuistl::make_view(pointerDestination));
OPM_GPU_SAFE_CALL(cudaMemcpy(&valueFromDevice, pointerDestination.get(), sizeof(double), cudaMemcpyDeviceToHost));
BOOST_CHECK_EQUAL(valueFromDevice, -1.0);
auto structPtr = Opm::gpuistl::make_gpu_shared_ptr<SomeStruct>();
callFunction<<<1, 1>>>(Opm::gpuistl::make_view(structPtr));
bool isCalled = false;
OPM_GPU_SAFE_CALL(cudaMemcpy(&isCalled, structPtr.get(), sizeof(bool), cudaMemcpyDeviceToHost));
BOOST_CHECK_EQUAL(isCalled, true);
auto uniquePtr = Opm::gpuistl::make_gpu_unique_ptr<double>(1.0);
auto uniqueView = Opm::gpuistl::make_view(uniquePtr);
double valueFromDeviceUnique = 0;
OPM_GPU_SAFE_CALL(cudaMemcpy(&valueFromDeviceUnique, uniqueView.get(), sizeof(double), cudaMemcpyDeviceToHost));
BOOST_CHECK_EQUAL(valueFromDeviceUnique, 1.0);
}