itkSingletonMacro.h File Reference

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Macros
#define	itkGetGlobalDeclarationMacro(Type, VarName)   static Type * Get##VarName##Pointer()
#define	itkGetGlobalInitializeMacro(Class, Type, VarName, SingletonName, Init)
#define	itkGetGlobalSimpleMacro(Class, Type, Name)   itkGetGlobalInitializeMacro(Class, Type, Name, Class, (void)0)
#define	itkGetGlobalValueMacro(Class, Type, Name, Value)    itkGetGlobalInitializeMacro(Class, Type, Name, Name, *m_##Name = Value)
#define	itkInitGlobalsMacro(VarName)

Macro Definition Documentation

itkGetGlobalDeclarationMacro

#define itkGetGlobalDeclarationMacro	(		Type,
			VarName
	)		static Type * Get##VarName##Pointer()

Definition at line 34 of file itkSingletonMacro.h.

itkGetGlobalInitializeMacro

#define itkGetGlobalInitializeMacro	(		Class,
			Type,
			VarName,
			SingletonName,
			Init
	)

Value:

  Type * Class::Get##VarName##Pointer()                                                             \
  {                                                                                                 \
    if (m_##VarName == nullptr)                                                                     \
    {                                                                                               \
      const auto deleteLambda = []() {                                                              \
        delete m_##VarName;                                                                         \
        m_##VarName = nullptr;                                                                      \
      };                                                                                            \
      auto * old_instance = SingletonIndex::GetInstance()->GetGlobalInstance<Type>(#SingletonName); \
      m_##VarName = Singleton<Type>(#SingletonName, deleteLambda);                                  \
      if (old_instance == nullptr)                                                                  \
      {                                                                                             \
        Init;                                                                                       \
      }                                                                                             \
    }                                                                                               \
    return m_##VarName;                                                                             \
  }                                                                                                 \
  ITK_MACROEND_NOOP_STATEMENT

Definition at line 41 of file itkSingletonMacro.h.

itkGetGlobalSimpleMacro

#define itkGetGlobalSimpleMacro	(		Class,
			Type,
			Name
	)		itkGetGlobalInitializeMacro(Class, Type, Name, Class, (void)0)

Definition at line 36 of file itkSingletonMacro.h.

itkGetGlobalValueMacro

#define itkGetGlobalValueMacro	(		Class,
			Type,
			Name,
			Value
	)		itkGetGlobalInitializeMacro(Class, Type, Name, Name, *m_##Name = Value)

Definition at line 38 of file itkSingletonMacro.h.

itkInitGlobalsMacro

#define itkInitGlobalsMacro

(

VarName

)

Value:

  {                                                                         \
    [[maybe_unused]] static auto * staticGlobals = Get##VarName##Pointer(); \
  }                                                                         \
  ITK_MACROEND_NOOP_STATEMENT

itkSingletonMacro.h defines macros that are used to declare and define global variables across ITK with a global map that is used to synchronize this variables across multiple instantiations of ITK if necessary. Note: this is rarely necessary.

Definition at line 28 of file itkSingletonMacro.h.