1/* Copyright 2015 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#include "tensorflow/core/framework/session_state.h"
17#include "tensorflow/core/graph/tensor_id.h"
18
19namespace tensorflow {
20
21// Adjust value in third_party/tensorflow/python/client/tf_session_wrapper.cc
22// in the get_tensor_handle_key function if adjusting the value for
23// kTensorHandleResourceTypeName.
24const char* SessionState::kTensorHandleResourceTypeName = "TensorHandle";
25
26Status SessionState::GetTensor(const string& handle, Tensor* tensor) {
27 mutex_lock l(state_lock_);
28 auto it = tensors_.find(handle);
29 if (it == tensors_.end()) {
30 return errors::InvalidArgument("The tensor with handle '", handle,
31 "' is not in the session store.");
32 }
33 *tensor = it->second;
34 return OkStatus();
35}
36
37Status SessionState::AddTensor(const string& handle, const Tensor& tensor) {
38 mutex_lock l(state_lock_);
39 if (!tensors_.insert({handle, tensor}).second) {
40 return errors::InvalidArgument("Failed to add a tensor with handle '",
41 handle, "' to the session store.");
42 }
43 return OkStatus();
44}
45
46Status SessionState::DeleteTensor(const string& handle) {
47 mutex_lock l(state_lock_);
48 if (tensors_.erase(handle) == 0) {
49 return errors::InvalidArgument("Failed to delete a tensor with handle '",
50 handle, "' in the session store.");
51 }
52 return OkStatus();
53}
54
55int64_t SessionState::GetNewId() {
56 mutex_lock l(state_lock_);
57 return tensor_id_++;
58}
59
60Status TensorStore::AddTensor(const string& name, const TensorAndKey& tk) {
61 mutex_lock l(lock_);
62 if (!tensors_.insert({name, tk}).second) {
63 return errors::InvalidArgument("Failed to add a tensor with name '", name,
64 "' to the tensor store.");
65 }
66 dirty_ = true;
67 return OkStatus();
68}
69
70Status TensorStore::SaveTensors(const std::vector<string>& output_names,
71 SessionState* session_state) {
72 mutex_lock l(lock_);
73 if (!tensors_.empty()) {
74 // Save only the tensors in output_names in the session.
75 for (const string& name : output_names) {
76 TensorId id(ParseTensorName(name));
77 const string op_name(id.first);
78 auto it = tensors_.find(op_name);
79 if (it != tensors_.end()) {
80 // Save the tensor to the session state.
81 string key = it->second.GetHandle(op_name);
82 TF_RETURN_IF_ERROR(session_state->AddTensor(key, it->second.tensor));
83 }
84 }
85 }
86 return OkStatus();
87}
88
89} // namespace tensorflow
90