Vsdk::Utils::Singleton< T >

Generic CRTP singleton abstraction. More...

#include <Singleton.hpp>

Static Public Member Functions
template<typename... Args>
static T &	init (Args &&... args)
static bool	hasInstance ()
static T &	instance ()
static void	destroy ()

Protected Member Functions
	Singleton ()=default

Detailed Description

template<typename T>
class Vsdk::Utils::Singleton< T >

Generic CRTP singleton abstraction.

Note

To correctly disable publicly constructing instances, T's constructors and destroy should not be public. You then need to friend this class and the std::default_delete<T> class to prevent compilation errors.

Constructor & Destructor Documentation

Singleton()

template<typename T >

Vsdk::Utils::Singleton< T >::Singleton ( )

protecteddefault

Member Function Documentation

init()

template<typename T >

template<typename... Args>

static T & Vsdk::Utils::Singleton< T >::init ( Args &&... args )

static

Exceptions

Exception

if called in initialized state to prevent silent destruction of previous instance.

hasInstance()

template<typename T >

static bool Vsdk::Utils::Singleton< T >::hasInstance ( )

static

Returns

true if already initialized, else false.

instance()

template<typename T >

static T & Vsdk::Utils::Singleton< T >::instance ( )

static

Exceptions

Exception

when called in uninitialized state.

destroy()

template<typename T >

static void Vsdk::Utils::Singleton< T >::destroy ( )

static

Note

Can be called even if not initialized.