1 files changed, 41 insertions, 0 deletions
diff --git a/tensorflow/compiler/xla/service/maybe_owning_device_memory.cc b/tensorflow/compiler/xla/service/maybe_owning_device_memory.cc
new file mode 100644
index 0000000000..8269842426
--- /dev/null
+++ b/tensorflow/compiler/xla/service/maybe_owning_device_memory.cc
@@ -0,0 +1,41 @@
+/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+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.
+==============================================================================*/
+
+#include "tensorflow/compiler/xla/service/maybe_owning_device_memory.h"
+#include "absl/types/variant.h"
+namespace xla {
+
+se::DeviceMemoryBase MaybeOwningDeviceMemory::AsDeviceMemoryBase() {
+  if (HasOwnership()) {
+    return absl::get<OwningDeviceMemory>(mem_).AsDeviceMemoryBase();
+  } else {
+    return absl::get<se::DeviceMemoryBase>(mem_);
+  }
+}
+
+bool MaybeOwningDeviceMemory::HasOwnership() const {
+  return absl::holds_alternative<OwningDeviceMemory>(mem_);
+}
+
+absl::optional<OwningDeviceMemory> MaybeOwningDeviceMemory::Release() {
+  if (!HasOwnership()) {
+    return {};
+  }
+  OwningDeviceMemory result = std::move(absl::get<OwningDeviceMemory>(mem_));
+  mem_ = result.AsDeviceMemoryBase();
+  return absl::make_optional<OwningDeviceMemory>(std::move(result));
+}
+
+}  // namespace xla