1 files changed, 83 insertions, 0 deletions
diff --git a/tensorflow/core/common_runtime/session_state.cc b/tensorflow/core/common_runtime/session_state.cc
new file mode 100644
index 0000000000..10e614cce5
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+++ b/tensorflow/core/common_runtime/session_state.cc
@@ -0,0 +1,83 @@
+/* Copyright 2015 Google Inc. 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/core/framework/session_state.h"
+#include "tensorflow/core/graph/tensor_id.h"
+
+namespace tensorflow {
+
+Status SessionState::GetTensor(const string& handle, Tensor* tensor) {
+  mutex_lock l(state_lock_);
+  auto it = tensors_.find(handle);
+  if (it == tensors_.end()) {
+    return errors::InvalidArgument("The tensor with handle '", handle,
+                                   "' is not in the session store.");
+  }
+  *tensor = it->second;
+  return Status::OK();
+}
+
+Status SessionState::AddTensor(const string& handle, const Tensor& tensor) {
+  mutex_lock l(state_lock_);
+  if (!tensors_.insert({handle, tensor}).second) {
+    return errors::InvalidArgument("Failed to add a tensor with handle '",
+                                   handle, "' to the session store.");
+  }
+  return Status::OK();
+}
+
+Status SessionState::DeleteTensor(const string& handle) {
+  mutex_lock l(state_lock_);
+  if (tensors_.erase(handle) == 0) {
+    return errors::InvalidArgument("Failed to delete a tensor with handle '",
+                                   handle, "' in the session store.");
+  }
+  return Status::OK();
+}
+
+int64 SessionState::GetNewId() {
+  mutex_lock l(state_lock_);
+  return tensor_id_++;
+}
+
+Status TensorStore::AddTensor(const string& name, const TensorAndKey& tk) {
+  mutex_lock l(lock_);
+  if (!tensors_.insert({name, tk}).second) {
+    return errors::InvalidArgument("Failed to add a tensor with name '", name,
+                                   "' to the tensor store.");
+  }
+  return Status::OK();
+}
+
+Status TensorStore::SaveTensors(const std::vector<string>& output_names,
+                                SessionState* session_state) {
+  mutex_lock l(lock_);
+  if (tensors_.size() != 0) {
+    // Save only the tensors in output_names in the session.
+    for (const string& name : output_names) {
+      TensorId id(ParseTensorName(name));
+      const string& op_name = id.first.ToString();
+      auto it = tensors_.find(op_name);
+      if (it != tensors_.end()) {
+        // Save the tensor to the session state.
+        string key = it->second.GetHandle(op_name);
+        TF_RETURN_IF_ERROR(session_state->AddTensor(key, it->second.tensor));
+      }
+    }
+  }
+  return Status::OK();
+}
+
+}  // namespace tensorflow