Slicer
5.1
Slicer is a multi-platform, free and open source software package for visualization and medical image computing
Libs
MRML
DisplayableManager
vtkSingleton.h
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/*=========================================================================
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Library: CTK
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Copyright (c) 2010 Kitware Inc.
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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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https://www.commontk.org/LICENSE
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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 __vtkSingleton_h
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#define __vtkSingleton_h
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//-----------------------------------------------------------------------------
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#define VTK_SINGLETON_DECLARE(NAME) \
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typedef NAME Self; \
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static NAME* Instance; \
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static void classInitialize(); \
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static void classFinalize(); \
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friend class NAME##Initialize;
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//-----------------------------------------------------------------------------
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#define VTK_SINGLETON_DECLARE_INITIALIZER(EXPORT_DIRECTIVE,NAME) \
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class EXPORT_DIRECTIVE NAME##Initialize \
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{ \
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public: \
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typedef NAME##Initialize Self; \
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\
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NAME##Initialize(); \
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~NAME##Initialize(); \
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private: \
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static unsigned int Count; \
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}; \
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\
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static NAME##Initialize NAME##Initializer;
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//-----------------------------------------------------------------------------
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#define VTK_SINGLETON_INITIALIZER_CXX(NAME) \
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NAME##Initialize::NAME##Initialize() \
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{ \
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if(++Self::Count == 1) \
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{ NAME::classInitialize(); } \
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} \
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\
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NAME##Initialize::~NAME##Initialize() \
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{ \
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if(--Self::Count == 0) \
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{ NAME::classFinalize(); } \
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} \
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\
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unsigned int NAME##Initialize::Count; \
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NAME* NAME::Instance;
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// TODO Would be great to have this macro working. that would avoid
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// to duplicate the following lines over and over
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//#define VTK_SINGLETON_GETINSTANCE_CXX(NAME)
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/* Up the reference count so it behaves like New */
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//NAME* NAME::New()
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//{
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// NAME* instance = Self::GetInstance();
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// instance->Register(0);
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// return instance;
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//}
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//NAME* NAME::GetInstance()
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//{
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// if(!Self::Instance)
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// {
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/* Try the factory first */
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// Self::Instance = (NAME*)vtkObjectFactory::CreateInstance(#NAME);
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//
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/* if the factory did not provide one, then create it here*/
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// if(!Self::Instance)
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// {
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/* if the factory failed to create the object, */
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/* then destroy it now, as vtkDebugLeaks::ConstructClass */
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/* was called with "NAME", and not the real name of the class */
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//#ifdef VTK_DEBUG_LEAKS
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// vtkDebugLeaks::DestructClass(#NAME);
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//#endif
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// Self::Instance = new NAME;
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// }
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// }
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// return Self::Instance;
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//}
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//----------------------------------------------------------------------------
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#define VTK_SINGLETON_CXX(NAME) \
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void NAME::classInitialize() \
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{ \
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Self::Instance = NAME::GetInstance(); \
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} \
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\
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void NAME::classFinalize() \
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{ \
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Self::Instance->Delete(); \
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Self::Instance = 0; \
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} \
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\
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VTK_SINGLETON_INITIALIZER_CXX(NAME)
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#endif //__vtkSingleton_h
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