[CUDA] Fix resource leaks in adapter tests

Fix issues missed by oneapi-src#1284:

* Use RAII wrapper for CUevent in
  `urCudaEventCreateWithNativeHandleTest.Success`.
* Use `uur::raii::Mem` in the
  `cudaUrContextCreateTest.ContextLifetimeExisting`.

test/adapters/cuda/context_tests.cpp

@@ -96,9 +96,9 @@ TEST_P(cudaUrContextCreateTest, ContextLifetimeExisting) {
  ASSERT_EQ(context, queue->getContext());
 
  // create a buffer in the context to set the context as active
- ur_mem_handle_t buffer;
+ uur::raii::Mem buffer;
  ASSERT_SUCCESS(urMemBufferCreate(context, UR_MEM_FLAG_READ_WRITE, 1024,
- nullptr, &buffer));
+ nullptr, buffer.ptr()));
 
  // check that context is now the active cuda context
  ASSERT_SUCCESS_CUDA(cuCtxGetCurrent(&current));

test/adapters/cuda/urEventCreateWithNativeHandle.cpp

@@ -9,16 +9,27 @@
 using urCudaEventCreateWithNativeHandleTest = uur::urQueueTest;
 UUR_INSTANTIATE_DEVICE_TEST_SUITE_P(urCudaEventCreateWithNativeHandleTest);
 
+struct RAIICUevent {
+ CUevent handle = nullptr;
+
+ ~RAIICUevent() {
+ if (handle) {
+ cuEventDestroy(handle);
+ }
+ }
+
+ CUevent *ptr() { return &handle; }
+ CUevent get() { return handle; }
+};
+
 TEST_P(urCudaEventCreateWithNativeHandleTest, Success) {
- CUevent cuda_event;
- ASSERT_SUCCESS_CUDA(cuEventCreate(&cuda_event, CU_EVENT_DEFAULT));
+ RAIICUevent cuda_event;
+ ASSERT_SUCCESS_CUDA(cuEventCreate(cuda_event.ptr(), CU_EVENT_DEFAULT));
 
  ur_native_handle_t native_event =
- reinterpret_cast<ur_native_handle_t>(cuda_event);
+ reinterpret_cast<ur_native_handle_t>(cuda_event.get());
 
  uur::raii::Event event = nullptr;
  EXPECT_SUCCESS(urEventCreateWithNativeHandle(native_event, context, nullptr,
  event.ptr()));
-
- ASSERT_SUCCESS_CUDA(cuEventDestroy(cuda_event));
 }