Arp::AppDomainSingleton< Derived > Class Template Reference

This class implements the singleton pattern for singletons with process wide scope. More...

#include <AppDomainSingleton.hxx>

Inheritance diagram for Arp::AppDomainSingleton< Derived >:

Static Public Member Functions
template<class T = Instance, class ... Args>
static Derived &	CreateInstance (Args &&... args)
	Creates this singleton instance. More...
static bool	IsCreated (void)
	Determines if this singleton instance is created yet. More...
static Derived &	GetInstance (void)
	Gets a reference of the singleton instance. More...
static Derived *	GetInstancePtr (void)
	Gets a pointer to the singleton instance. More...
static void	DisposeInstance (void)
	Disposes this singleton instance. More...

Protected Types
typedef AppDomainSingleton< Derived >	SingletonBase
	Defines this type to be used from derived classes.

Protected Member Functions
	AppDomainSingleton (void)=default
	The protected default constructor.
	~AppDomainSingleton (void)=default
	The protected default destructor.

Detailed Description

template<class Derived>
class Arp::AppDomainSingleton< Derived >

This class implements the singleton pattern for singletons with process wide scope.

Template Parameters

Derived

The class to apply the singleton pattern to.

Derive your own class called MyClass from AppDomainSingleton<MyClass> to apply the singleton pattern to this class.

This class uses CRTP (Curiously recurring template pattern) to implement an own singleton instance for each derived class. For CRTP see: https://en.wikipedia.org/wiki/Curiously_recurring_template_pattern

Member Function Documentation

CreateInstance()

template<class Derived >

template<class T , class ... Args>

Derived & Arp::AppDomainSingleton< Derived >::CreateInstance ( Args &&...  args )

inlinestatic

Creates this singleton instance.

Template Parameters

T	The type to create. Usually this is the derived type, but it might also be a polymorphic type.
Args	The argument list must match a constructor's signature of T .

Parameters

args	The arguments passed to the constructor of T . Thus there must exists a constructor of T with a matching signature.

Returns

The new created singleton instance as reference.

DisposeInstance()

template<class Derived >

void Arp::AppDomainSingleton< Derived >::DisposeInstance ( void  )

inlinestatic

Disposes this singleton instance.

Deletes the singleton instance pointer.

GetInstance()

template<class Derived >

Derived & Arp::AppDomainSingleton< Derived >::GetInstance ( void  )

inlinestatic

Gets a reference of the singleton instance.

Returns

The singleton instance as reference.

Exceptions

Exception

If the singleton instance was not created yet.

GetInstancePtr()

template<class Derived >

Derived * Arp::AppDomainSingleton< Derived >::GetInstancePtr ( void  )

inlinestatic

Gets a pointer to the singleton instance.

Returns

The singleton instance as pointer, if it was created yet, otherwise nullptr.

IsCreated()

template<class Derived >

bool Arp::AppDomainSingleton< Derived >::IsCreated ( void  )

inlinestatic

Determines if this singleton instance is created yet.

Returns

true if this singleton was created yet, otherwise false.

---

The documentation for this class was generated from the following file:

• Arp/System/Core/AppDomainSingleton.hxx