Singleton Class Reference

Process-wide singletons More...

#include <cc/Singleton>

Inheritance diagram for Singleton:

Protected Member Functions
	Singleton ()=default
	Create a null singleton.
	Singleton (State *state)
	Initialize singleton object with instance state.
Protected Member Functions inherited from Object
template<class T >
T	weak () const
template<class T >
void	initOnce ()
	Create the object state when called the first time.
template<class T >
void	initOncePerThread ()
	Create a distinct object state for each thread when called the first time in that thread.
	Object (State *newState)
	Initialize object with newState.
	Object (State *state, Alias)
	Object (State *state, Weak)
Object &	operator= (std::nullptr_t)

Static Protected Member Functions
template<class T >
static Handle< T > &	handle ()
template<class T >
static void	destroy ()
template<class T >
static T *	instance ()
	Get access to the singleton instance.
Static Protected Member Functions inherited from Object
template<class T >
static T	alias (const State *state)
	Create an alias object for the given state.
template<class T >
static T	weak (const State *state)

Additional Inherited Members
Public Member Functions inherited from Object
	Object ()=default
	Create a null object.
	operator bool () const
	Check if this is a non-null object.
bool	isNull () const
	Check if this is a null object.
template<class T >
bool	is () const
	Check if this object is of type T.
template<class T >
T	as () const
	Cast this object to type T.
bool	isWeak () const
	Check if the underlying object reference is weak.
bool	operator== (const Object &other) const
	Equality operator.
std::strong_ordering	operator<=> (const Object &other) const
	Ordering operator.
long	useCount () const
	Reference count.
Protected Attributes inherited from Object
Handle< State >	me
	Internal object state

Detailed Description

Process-wide singletons

See also

ThreadLocalSingleton, Object::initOnce(), Object::initOncePerThread(), global()

Constructor & Destructor Documentation

Singleton() [1/2]

Singleton ( )

protecteddefault

Create a null singleton.

Singleton() [2/2]

Singleton ( State * state )

explicitprotected

Initialize singleton object with instance state.

Member Function Documentation

instance()

template<class T >

static T * instance ( )

staticprotected

Get access to the singleton instance.