DefaultGraphStack.cs

/*****************************************************************************
 Copyright 2018 The TensorFlow.NET Authors. All Rights Reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
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 See the License for the specific language governing permissions and
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******************************************************************************/

using System;
using System.Collections.Generic;

namespace Tensorflow
{
 /// <summary>
 /// Serves as a stack for determining current default graph.
 /// </summary>
 public class DefaultGraphStack
 {
 Stack<Graph> _stack = new Stack<Graph>();

 public Graph get_default()
 {
 if (_stack.Count == 0)
 _stack.Push(new Graph());

 return _stack.Peek();
 }

 public Graph get_controller(Graph g)
 {
 _stack.Push(g);
 return g;
 }

 public Graph peak_controller()
 {
 if (_stack.Count == 0)
 return null;
 return _stack.Peek();
 }

 public void pop()
 {
 _stack.Pop();
 }

 public void reset()
 {
 _stack.Clear();
 }
 }
}