60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#ifndef TENSORFLOW_COMPILER_XLA_PACKED_LITERAL_READER_H_
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#define TENSORFLOW_COMPILER_XLA_PACKED_LITERAL_READER_H_
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#include <memory>
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#include "tensorflow/compiler/xla/literal.h"
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#include "tensorflow/compiler/xla/statusor.h"
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#include "tensorflow/compiler/xla/types.h"
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#include "tensorflow/compiler/xla/xla_data.pb.h"
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#include "tensorflow/core/platform/env.h"
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#include "tensorflow/core/platform/macros.h"
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namespace xla {
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// Reads packed data from a metadata-less file as requested by a user (who must
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// know its internal format). These are yielded as (structured) literal values.
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class PackedLiteralReader {
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public:
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// Ownership of file is passed to this instance -- this instance takes
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// responsibility for closing it.
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explicit PackedLiteralReader(tensorflow::RandomAccessFile* file);
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~PackedLiteralReader();
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// Yields the next packed literal with shape "shape" as read from the
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// underlying file stream.
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//
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// Layout is optional. If it is not provided, no layout is set on the literal
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// that is produced.
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StatusOr<Literal> Read(const Shape& shape, const Layout* layout = nullptr);
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// Returns whether the input file has been fully exhausted; i.e. all available
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// packed literals have been read and we're at the end of the file.
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bool IsExhausted() const;
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private:
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tensorflow::RandomAccessFile* file_; // We own and close in our destructor
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uint64 offset_; // Next file offset to read from
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TF_DISALLOW_COPY_AND_ASSIGN(PackedLiteralReader);
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};
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} // namespace xla
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#endif // TENSORFLOW_COMPILER_XLA_PACKED_LITERAL_READER_H_
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