Data holder for the eager delegate.

PiperOrigin-RevId: 205088322

4 files changed, 160 insertions, 0 deletions

diff --git a/tensorflow/contrib/lite/delegates/eager/BUILD b/tensorflow/contrib/lite/delegates/eager/BUILD
index 9d8c20e96f..23d8f543e5 100644
--- a/tensorflow/contrib/lite/delegates/eager/BUILD
+++ b/tensorflow/contrib/lite/delegates/eager/BUILD
@@ -39,6 +39,34 @@ cc_test(
 )
 
 cc_library(
+    name = "delegate_data",
+    srcs = ["delegate_data.cc"],
+    hdrs = ["delegate_data.h"],
+    deps = [
+        ":buffer_map",
+        "//tensorflow/core:core_cpu",
+        "//tensorflow/core:lib",
+        "//tensorflow/core/common_runtime/eager:context",
+    ],
+)
+
+cc_test(
+    name = "delegate_data_test",
+    size = "small",
+    srcs = ["delegate_data_test.cc"],
+    tags = [
+        "tflite_not_portable",
+    ],
+    deps = [
+        ":delegate_data",
+        "//tensorflow/contrib/lite:framework",
+        "//tensorflow/contrib/lite:util",
+        "//tensorflow/contrib/lite/testing:util",
+        "@com_google_googletest//:gtest",
+    ],
+)
+
+cc_library(
     name = "util",
     srcs = ["util.cc"],
     hdrs = ["util.h"],
diff --git a/tensorflow/contrib/lite/delegates/eager/delegate_data.cc b/tensorflow/contrib/lite/delegates/eager/delegate_data.cc
new file mode 100644
index 0000000000..b2516379e7
--- /dev/null
+++ b/tensorflow/contrib/lite/delegates/eager/delegate_data.cc
@@ -0,0 +1,44 @@
+/* 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/contrib/lite/delegates/eager/delegate_data.h"
+
+#include "tensorflow/core/common_runtime/device_factory.h"
+#include "tensorflow/core/lib/core/status.h"
+
+namespace tflite {
+tensorflow::Status DelegateData::Create(std::unique_ptr<DelegateData>* data) {
+  std::vector<tensorflow::Device*> devices;
+
+  TF_RETURN_IF_ERROR(tensorflow::DeviceFactory::AddDevices(
+      tensorflow::SessionOptions(), "/device:cpu:*", &devices));
+
+  std::unique_ptr<tensorflow::DeviceMgr> device_mgr(
+      new tensorflow::DeviceMgr(devices));
+  // Note that Rendezvous is ref-counted so it will be automatically deleted.
+  tensorflow::Rendezvous* rendezvous =
+      new tensorflow::IntraProcessRendezvous(device_mgr.get());
+  data->reset(new DelegateData(new tensorflow::EagerContext(
+      tensorflow::SessionOptions(),
+      tensorflow::ContextDevicePlacementPolicy::DEVICE_PLACEMENT_SILENT,
+      /*async=*/false, std::move(device_mgr), rendezvous)));
+  return tensorflow::Status();
+}
+
+DelegateData::DelegateData(tensorflow::EagerContext* eager_context)
+    : eager_context_(eager_context) {}
+
+DelegateData::~DelegateData() {}
+
+}  // namespace tflite
diff --git a/tensorflow/contrib/lite/delegates/eager/delegate_data.h b/tensorflow/contrib/lite/delegates/eager/delegate_data.h
new file mode 100644
index 0000000000..053d174c08
--- /dev/null
+++ b/tensorflow/contrib/lite/delegates/eager/delegate_data.h
@@ -0,0 +1,46 @@
+/* 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.
+==============================================================================*/
+#ifndef TENSORFLOW_CONTRIB_LITE_DELEGATES_EAGER_DELEGATE_DATA_H_
+#define TENSORFLOW_CONTRIB_LITE_DELEGATES_EAGER_DELEGATE_DATA_H_
+
+#include "tensorflow/contrib/lite/delegates/eager/buffer_map.h"
+#include "tensorflow/core/common_runtime/eager/context.h"
+
+namespace tflite {
+
+// Data kept by the Eager delegate for the lifetime of an Interpreter.
+class DelegateData {
+ public:
+  // Create a new DelegateData, initialized with a newly-created EagerContext.
+  static tensorflow::Status Create(std::unique_ptr<DelegateData>* data);
+
+  ~DelegateData();
+
+  // The EagerContext that is required for execution of Eager Ops.
+  tensorflow::EagerContext* GetEagerContext() { return eager_context_.get(); }
+
+  // Map from TF Lite tensor index to TensorFlow tensor.
+  BufferMap* GetBufferMap() { return &buffer_map_; }
+
+ private:
+  explicit DelegateData(tensorflow::EagerContext* eager_context);
+
+  std::unique_ptr<tensorflow::EagerContext> eager_context_;
+  BufferMap buffer_map_;
+};
+
+}  // namespace tflite
+
+#endif  // TENSORFLOW_CONTRIB_LITE_DELEGATES_EAGER_DELEGATE_DATA_H_
diff --git a/tensorflow/contrib/lite/delegates/eager/delegate_data_test.cc b/tensorflow/contrib/lite/delegates/eager/delegate_data_test.cc
new file mode 100644
index 0000000000..cf8bc27d04
--- /dev/null
+++ b/tensorflow/contrib/lite/delegates/eager/delegate_data_test.cc
@@ -0,0 +1,42 @@
+/* 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/contrib/lite/delegates/eager/delegate_data.h"
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include "tensorflow/contrib/lite/testing/util.h"
+
+namespace tflite {
+namespace {
+
+TEST(DelegateDataTest, Basic) {
+  std::unique_ptr<DelegateData> data;
+  // We only check for success because it is hard to make initialization fail.
+  // It only happens if we manage to not link the CPU device factory into the
+  // binary.
+  EXPECT_TRUE(DelegateData::Create(&data).ok());
+
+  EXPECT_NE(data->GetEagerContext(), nullptr);
+  EXPECT_NE(data->GetBufferMap(), nullptr);
+}
+
+}  // namespace
+}  // namespace tflite
+
+int main(int argc, char** argv) {
+  ::tflite::LogToStderr();
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}