Added utility class to hold a GPU resource (stream, event, graph, etc).

tests/gpuistl/test_gpu_resources.cu

@@ -0,0 +1,75 @@
+/*
+  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>
+#include <opm/simulators/linalg/gpuistl/gpu_resources.hpp>
+
+#define BOOST_TEST_MODULE TestGPUResources
+
+#include <boost/test/unit_test.hpp>
+#include <cuda_runtime.h>
+
+namespace
+{
+__global__ void
+dummyKernel()
+{
+}
+} // namespace
+
+BOOST_AUTO_TEST_CASE(TestStreams)
+{
+    using namespace Opm::gpuistl;
+    BOOST_CHECK_NO_THROW(GPUStream());
+    auto stream = GPUStream();
+    BOOST_CHECK(stream.get() != nullptr);
+
+    // Check that we can launch a kernel with said stream
+
+    dummyKernel<<<1, 1, 0, stream.get()>>>();
+    OPM_GPU_SAFE_CALL(cudaDeviceSynchronize());
+    OPM_GPU_SAFE_CALL(cudaGetLastError());
+}
+
+BOOST_AUTO_TEST_CASE(TestEvents)
+{
+    using namespace Opm::gpuistl;
+    BOOST_CHECK_NO_THROW(GPUEvent());
+    auto event = GPUEvent();
+    BOOST_CHECK(event.get() != nullptr);
+
+    // Check that we can record and wait for said event
+
+    OPM_GPU_SAFE_CALL(cudaEventRecord(event.get()));
+    OPM_GPU_SAFE_CALL(cudaEventSynchronize(event.get()));
+    OPM_GPU_SAFE_CALL(cudaGetLastError());
+}
+
+BOOST_AUTO_TEST_CASE(TestGraph)
+{
+    using namespace Opm::gpuistl;
+    BOOST_CHECK_NO_THROW(GPUGraph());
+    auto graph = GPUGraph();
+    BOOST_CHECK(graph.get() != nullptr);
+}
+
+BOOST_AUTO_TEST_CASE(TestGraphExec)
+{
+    using namespace Opm::gpuistl;
+    BOOST_CHECK_NO_THROW(GPUGraphExec());
+}