72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
/* Copyright 2020 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_CC_EXPERIMENTAL_BASE_PUBLIC_RUNTIME_H_
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#define TENSORFLOW_CC_EXPERIMENTAL_BASE_PUBLIC_RUNTIME_H_
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#include <memory>
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#include "tensorflow/c/eager/c_api_experimental.h"
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namespace tensorflow {
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namespace experimental {
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namespace cc {
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// Runtime represents an opaque instance of a Tensorflow runtime, with its own
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// resources, threadpools, etc. Clients are expected to construct a Runtime
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// object through tensorflow::cc::RuntimeBuilder::Build, after setting any
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// relevant configuration options. Many Tensorflow functions take a reference to
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// the runtime as an argument (eg: tensorflow::cc::SavedModelAPI::Load), and
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// may have different implementations depending on the runtime. For many of
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// these Runtime-attached objects (such as tensorflow::cc::TensorHandle), the
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// Runtime must outlive these objects.
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class Runtime {
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public:
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// Runtime is movable, but not copyable.
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Runtime(Runtime&&) = default;
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Runtime& operator=(Runtime&&) = default;
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private:
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friend class RuntimeBuilder;
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friend class SavedModelAPI;
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friend class TensorHandle;
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// Wraps a TFE_Context. Takes ownership of ctx.
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explicit Runtime(TFE_Context* ctx) : ctx_(ctx) {}
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// Deletes the currently wrapped TFE_Context, swaps it with ctx,
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// and takes ownership of ctx.
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void Reset(TFE_Context* ctx) { ctx_.reset(ctx); }
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// Returns the TFE_Context that this object wraps. This object
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// retains ownership of the pointer.
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TFE_Context* GetTFEContext() const { return ctx_.get(); }
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// Runtime is not copyable
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Runtime(const Runtime&) = delete;
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Runtime& operator=(const Runtime&) = delete;
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struct TFEContextDeleter {
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void operator()(TFE_Context* p) const { TFE_DeleteContext(p); }
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};
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std::unique_ptr<TFE_Context, TFEContextDeleter> ctx_;
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};
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} // namespace cc
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} // namespace experimental
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} // namespace tensorflow
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#endif // TENSORFLOW_CC_EXPERIMENTAL_BASE_PUBLIC_RUNTIME_H_
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