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// See docs in ../ops/io_ops.cc.
17#include "tensorflow/core/kernels/save_restore_tensor.h"
18
19#include "tensorflow/core/framework/op_kernel.h"
20#include "tensorflow/core/lib/core/errors.h"
21#include "tensorflow/core/lib/gtl/array_slice.h"
22#include "tensorflow/core/platform/logging.h"
23#include "tensorflow/core/util/tensor_slice_reader.h"
24
25namespace tensorflow {
26
27class RestoreOp : public OpKernel {
28 public:
29 explicit RestoreOp(OpKernelConstruction* context) : OpKernel(context) {
30 int preferred_shard;
31 OP_REQUIRES_OK(context,
32 context->GetAttr("preferred_shard", &preferred_shard));
33 if (preferred_shard == -1) {
34 preferred_shard_ = checkpoint::TensorSliceReader::kLoadAllShards;
35 } else {
36 OP_REQUIRES(context, preferred_shard >= 0,
37 errors::InvalidArgument("Attribute 'preferred_shard' must be "
38 "greater or equal to -1"));
39 preferred_shard_ = preferred_shard;
40 }
41 }
42 void Compute(OpKernelContext* context) override {
43 RestoreTensor(context, &checkpoint::OpenTableTensorSliceReader,
44 preferred_shard_, false, 0);
45 }
46
47 private:
48 int preferred_shard_;
49};
50
51REGISTER_KERNEL_BUILDER(Name("Restore").Device(DEVICE_CPU), RestoreOp);
52
53class RestoreSliceOp : public OpKernel {
54 public:
55 explicit RestoreSliceOp(OpKernelConstruction* context) : OpKernel(context) {
56 int preferred_shard;
57 OP_REQUIRES_OK(context,
58 context->GetAttr("preferred_shard", &preferred_shard));
59 if (preferred_shard == -1) {
60 preferred_shard_ = checkpoint::TensorSliceReader::kLoadAllShards;
61 } else {
62 OP_REQUIRES(context, preferred_shard >= 0,
63 errors::InvalidArgument("Attribute 'preferred_shard' must be "
64 "greater or equal to -1"));
65 preferred_shard_ = preferred_shard;
66 }
67 }
68 void Compute(OpKernelContext* context) override {
69 RestoreTensor(context, &checkpoint::OpenTableTensorSliceReader,
70 preferred_shard_, true, 0);
71 }
72
73 private:
74 int preferred_shard_;
75};
76
77REGISTER_KERNEL_BUILDER(Name("RestoreSlice").Device(DEVICE_CPU),
78 RestoreSliceOp);
79
80} // namespace tensorflow
81