84 lines
3.0 KiB
C++
84 lines
3.0 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_C_EAGER_ABSTRACT_CONTEXT_H_
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#define TENSORFLOW_C_EAGER_ABSTRACT_CONTEXT_H_
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#include <memory>
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#include <vector>
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#include "tensorflow/c/eager/abstract_function.h"
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#include "tensorflow/c/eager/abstract_operation.h"
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namespace tensorflow {
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// Abstract interface to a context.
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//
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// This serves as a factory for creating `AbstractOperation`s and for
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// registering traced functions.
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// Operations creation within a context can only be executed in that context
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// (for now at least).
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// Implementations of the context may contain some state e.g. an execution
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// environment, a traced representation etc.
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class AbstractContext {
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protected:
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enum AbstractContextKind { kTracing, kImmediateExecution };
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explicit AbstractContext(AbstractContextKind kind) : kind_(kind) {}
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virtual ~AbstractContext() {}
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public:
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AbstractContextKind getKind() const { return kind_; }
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// Release any underlying resources, including the interface object.
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//
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// WARNING: The destructor of this class is marked as protected to disallow
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// clients from directly destroying this object since it may manage it's own
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// lifetime through ref counting. Thus clients MUST call Release() in order to
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// destroy an instance of this class.
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virtual void Release() = 0;
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// Creates an operation builder and ties it to this context.
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// The returned object can be used for setting operation's attributes,
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// adding inputs and finally executing (immediately or lazily as in tracing)
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// it in this context.
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virtual AbstractOperation* CreateOperation() = 0;
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// Registers a function with this context, after this the function is
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// available to be called/referenced by its name in this context.
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virtual Status RegisterFunction(AbstractFunction*) = 0;
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// Remove a function. 'func' argument is the name of a previously added
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// FunctionDef. The name is in fdef.signature.name.
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virtual Status RemoveFunction(const string& func) = 0;
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private:
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const AbstractContextKind kind_;
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};
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namespace internal {
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struct AbstractContextDeleter {
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void operator()(AbstractContext* p) const {
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if (p != nullptr) {
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p->Release();
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}
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}
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};
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} // namespace internal
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using AbstractContextPtr =
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std::unique_ptr<AbstractContext, internal::AbstractContextDeleter>;
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} // namespace tensorflow
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#endif // TENSORFLOW_C_EAGER_ABSTRACT_CONTEXT_H_
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