chore: import upstream snapshot with attribution

libnd4j/include/array/cuda/CudaPointerDeallocator.cu

@@ -0,0 +1,47 @@
+/*
+ *  ******************************************************************************
+ *  *
+ *  *
+ *  * This program and the accompanying materials are made available under the
+ *  * terms of the Apache License, Version 2.0 which is available at
+ *  * https://www.apache.org/licenses/LICENSE-2.0.
+ *  *
+ *  * See the NOTICE file distributed with this work for additional
+ *  * information regarding copyright ownership.
+ *  * Unless required by applicable law or agreed to in writing, software
+ *  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ *  * License for the specific language governing permissions and limitations
+ *  * under the License.
+ *  *
+ *  * SPDX-License-Identifier: Apache-2.0
+ *  *****************************************************************************
+ */
+
+//
+//  @author raver119@gmail.com
+//
+#include <array/CudaPointerDeallocator.h>
+
+namespace sd {
+
+void CudaPointerDeallocator::release(void *ptr) {
+  if (ptr == nullptr) return;
+
+  // Check if this is a valid device pointer before freeing
+  cudaPointerAttributes attributes;
+  cudaError_t result = cudaPointerGetAttributes(&attributes, ptr);
+
+  if (result == cudaSuccess) {
+    // Only free if it's a regular device pointer
+    // cudaMemoryTypeDevice is for regular allocations we can free
+    if (attributes.type == cudaMemoryTypeDevice) {
+      cudaFree(ptr);
+    }
+    // Don't free other types (like constant memory)
+  } else {
+    // Clear the error and don't try to free this pointer
+    cudaGetLastError(); // Clear the error state
+  }
+}
+}  // namespace sd