1 | /* Copyright 2015 The TensorFlow Authors. All Rights Reserved. |
2 | |
3 | Licensed under the Apache License, Version 2.0 (the "License"); |
4 | you may not use this file except in compliance with the License. |
5 | You may obtain a copy of the License at |
6 | |
7 | http://www.apache.org/licenses/LICENSE-2.0 |
8 | |
9 | Unless required by applicable law or agreed to in writing, software |
10 | distributed under the License is distributed on an "AS IS" BASIS, |
11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | See the License for the specific language governing permissions and |
13 | limitations under the License. |
14 | ==============================================================================*/ |
15 | |
16 | #ifndef TENSORFLOW_CORE_FRAMEWORK_TENSOR_REFERENCE_H_ |
17 | #define TENSORFLOW_CORE_FRAMEWORK_TENSOR_REFERENCE_H_ |
18 | |
19 | #include "tensorflow/core/framework/tensor.h" |
20 | #include "tensorflow/core/lib/gtl/inlined_vector.h" |
21 | |
22 | namespace tensorflow { |
23 | |
24 | // An opaque class that holds a reference to an underlying TensorBuffer. |
25 | // Unlike Tensor, it does not have any shape or type information, so |
26 | // it is cheaper to construct/move, but the only thing you can really do |
27 | // with it is Unref it, which releases one of the references to the underlying |
28 | // TensorBuffer. |
29 | // IMPORTANT: If you do not call Unref(), you will likely leak tensor memory. |
30 | class TensorReference { |
31 | public: |
32 | // Take the reference of the root buffer so the size will be more accurate |
33 | explicit TensorReference(const Tensor& tensor) |
34 | : buf_(tensor.buf_ ? tensor.buf_->root_buffer() : nullptr) { |
35 | if (buf_) buf_->Ref(); |
36 | } |
37 | |
38 | ~TensorReference() {} |
39 | |
40 | void Unref() const { |
41 | if (buf_) buf_->Unref(); |
42 | } |
43 | |
44 | void FillDescription(AllocationDescription* description) const { |
45 | if (buf_) buf_->FillAllocationDescription(description); |
46 | } |
47 | |
48 | private: |
49 | TensorBuffer* buf_; |
50 | }; |
51 | |
52 | } // namespace tensorflow |
53 | |
54 | #endif // TENSORFLOW_CORE_FRAMEWORK_TENSOR_REFERENCE_H_ |
55 | |