decaf::lang::Pointer< T, REFCOUNTER > Class Template Reference

Decaf's implementation of a Smart Pointer that is a template on a Type and is Thread Safe if the default Reference Counter is used. More...

#include <src/main/decaf/lang/Pointer.h>

Public Types
typedef T *	PointerType
typedef T &	ReferenceType
typedef REFCOUNTER	CounterType
Public Member Functions
	Pointer ()
	Default Constructor.
	Pointer (const PointerType value)
	Explicit Constructor, creates a Pointer that contains value with a single reference.
	Pointer (const Pointer &value) throw ()
	Copy constructor.
template<typename T1 , typename R1 >
	Pointer (const Pointer< T1, R1 > &value) throw ()
	Copy constructor.
template<typename T1 , typename R1 >
	Pointer (const Pointer< T1, R1 > &value, const STATIC_CAST_TOKEN &) throw ()
	Static Cast constructor.
template<typename T1 , typename R1 >
	Pointer (const Pointer< T1, R1 > &value, const DYNAMIC_CAST_TOKEN &)
	Dynamic Cast constructor.
virtual	~Pointer () throw ()
void	reset (T *value)
	Resets the Pointer to hold the new value.
T *	release ()
	Releases the Pointer held and resets the internal pointer value to Null.
PointerType	get () const
	Gets the real pointer that is contained within this Pointer.
void	swap (Pointer &value) throw ()
	Exception Safe Swap Function.
Pointer &	operator= (const Pointer &right) throw ()
	Assigns the value of right to this Pointer and increments the reference Count.
template<typename T1 , typename R1 >
Pointer &	operator= (const Pointer< T1, R1 > &right) throw ()
ReferenceType	operator* ()
	Dereference Operator, returns a reference to the Contained value.
ReferenceType	operator* () const
PointerType	operator-> ()
	Indirection Operator, returns a pointer to the Contained value.
PointerType	operator-> () const
bool	operator! () const
template<typename T1 , typename R1 >
bool	operator== (const Pointer< T1, R1 > &right) const
template<typename T1 , typename R1 >
bool	operator!= (const Pointer< T1, R1 > &right) const
template<typename T1 >
Pointer< T1, CounterType >	dynamicCast () const
template<typename T1 >
Pointer< T1, CounterType >	staticCast () const
Friends
bool	operator== (const Pointer &left, const T *right)
bool	operator== (const T *left, const Pointer &right)
bool	operator!= (const Pointer &left, const T *right)
bool	operator!= (const T *left, const Pointer &right)

---

Detailed Description

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>
class decaf::lang::Pointer< T, REFCOUNTER >

Decaf's implementation of a Smart Pointer that is a template on a Type and is Thread Safe if the default Reference Counter is used.

This Pointer type allows for the substitution of different Reference Counter implementations which provide a means of using invasive reference counting if desired using a custom implementation of ReferenceCounter.

The Decaf smart pointer provide comparison operators for comparing Pointer instances in the same manner as normal pointer, except that it does not provide an overload of operators ( <, <=, >, >= ). To allow use of a Pointer in a STL container that requires it, Pointer provides an implementation of std::less.

Since:

1.0

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Member Typedef Documentation

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

typedef REFCOUNTER decaf::lang::Pointer< T, REFCOUNTER >::CounterType

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

typedef T* decaf::lang::Pointer< T, REFCOUNTER >::PointerType

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

typedef T& decaf::lang::Pointer< T, REFCOUNTER >::ReferenceType

---

Constructor & Destructor Documentation

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

decaf::lang::Pointer< T, REFCOUNTER >::Pointer

(

)

[inline]

Default Constructor.

Initialized the contained pointer to NULL, using the -> operator results in an exception unless reset to contain a real value.

Referenced by decaf::lang::Pointer< TransactionId >::reset().

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

decaf::lang::Pointer< T, REFCOUNTER >::Pointer

(

const PointerType

value

)

[inline, explicit]

Explicit Constructor, creates a Pointer that contains value with a single reference.

This object now has ownership until a call to release.

Parameters:

value

- instance of the type we are containing here.

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

decaf::lang::Pointer< T, REFCOUNTER >::Pointer

(

const Pointer< T, REFCOUNTER > &

value

)

throw () [inline]

Copy constructor.

Copies the value contained in the pointer to the new instance and increments the reference counter.

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

template<typename T1 , typename R1 >

decaf::lang::Pointer< T, REFCOUNTER >::Pointer

(

const Pointer< T1, R1 > &

value

)

throw () [inline]

Copy constructor.

Copies the value contained in the pointer to the new instance and increments the reference counter.

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

template<typename T1 , typename R1 >

decaf::lang::Pointer< T, REFCOUNTER >::Pointer	(	const Pointer< T1, R1 > &	value,
		const STATIC_CAST_TOKEN &
	)		throw () [inline]

Static Cast constructor.

Copies the value contained in the pointer to the new instance and increments the reference counter performing a static cast on the value contained in the source Pointer object.

Parameters:

value

- Pointer instance to cast to this type.

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

template<typename T1 , typename R1 >

decaf::lang::Pointer< T, REFCOUNTER >::Pointer	(	const Pointer< T1, R1 > &	value,
		const DYNAMIC_CAST_TOKEN &
	)		[inline]

Dynamic Cast constructor.

Copies the value contained in the pointer to the new instance and increments the reference counter performing a dynamic cast on the value contained in the source Pointer object. If the cast fails and return NULL then this method throws a ClassCastException.

Parameters:

value

- Pointer instance to cast to this type.

Exceptions:

ClassCastException

if the dynamic cast returns NULL

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

virtual decaf::lang::Pointer< T, REFCOUNTER >::~Pointer

(

)

throw () [inline, virtual]

---

Member Function Documentation

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

template<typename T1 >

Pointer<T1, CounterType> decaf::lang::Pointer< T, REFCOUNTER >::dynamicCast

(

)

const [inline]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

PointerType decaf::lang::Pointer< T, REFCOUNTER >::get

(

)

const [inline]

Gets the real pointer that is contained within this Pointer.

This is not really safe since the caller could delete or alter the pointer but it mimics the STL auto_ptr and gives access in cases where the caller absolutely needs the real Pointer. Use at your own risk.

Returns:

the contained pointer.

Referenced by activemq::commands::ActiveMQMessageTemplate< cms::ObjectMessage >::equals(), activemq::state::ConnectionState::getTransactionState(), decaf::lang::operator!=(), decaf::lang::Pointer< TransactionId >::operator!=(), std::less< decaf::lang::Pointer< T > >::operator()(), decaf::lang::operator==(), decaf::lang::Pointer< TransactionId >::operator==(), decaf::util::concurrent::LinkedBlockingQueue< E >::peek(), activemq::state::CommandVisitorAdapter::processRemoveInfo(), and activemq::state::ConnectionState::removeTempDestination().

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

bool decaf::lang::Pointer< T, REFCOUNTER >::operator!

(

)

const [inline]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

template<typename T1 , typename R1 >

bool decaf::lang::Pointer< T, REFCOUNTER >::operator!=

(

const Pointer< T1, R1 > &

right

)

const [inline]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

ReferenceType decaf::lang::Pointer< T, REFCOUNTER >::operator*

(

)

const [inline]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

ReferenceType decaf::lang::Pointer< T, REFCOUNTER >::operator*

(

)

[inline]

Dereference Operator, returns a reference to the Contained value.

This method throws an NullPointerException if the contained value is NULL.

Returns:

reference to the contained pointer.

Exceptions:

NullPointerException

if the contained value is Null

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

PointerType decaf::lang::Pointer< T, REFCOUNTER >::operator->

(

)

[inline]

Indirection Operator, returns a pointer to the Contained value.

This method throws an NullPointerException if the contained value is NULL.

Returns:

reference to the contained pointer.

Exceptions:

NullPointerException

if the contained value is Null

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

PointerType decaf::lang::Pointer< T, REFCOUNTER >::operator->

(

)

const [inline]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

Pointer& decaf::lang::Pointer< T, REFCOUNTER >::operator=

(

const Pointer< T, REFCOUNTER > &

right

)

throw () [inline]

Assigns the value of right to this Pointer and increments the reference Count.

Parameters:

right

- Pointer on the right hand side of an operator= call to this.

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

template<typename T1 , typename R1 >

Pointer& decaf::lang::Pointer< T, REFCOUNTER >::operator=

(

const Pointer< T1, R1 > &

right

)

throw () [inline]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

template<typename T1 , typename R1 >

bool decaf::lang::Pointer< T, REFCOUNTER >::operator==

(

const Pointer< T1, R1 > &

right

)

const [inline]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

T* decaf::lang::Pointer< T, REFCOUNTER >::release

(

)

[inline]

Releases the Pointer held and resets the internal pointer value to Null.

This method is not guaranteed to be safe if the Pointer is held by more than one object or this method is called from more than one thread.

Parameters:

value

- The new value to contain.

Returns:

The pointer instance that was held by this Pointer object, the pointer is no longer owned by this Pointer and won't be freed when this Pointer goes out of scope.

Referenced by decaf::lang::Pointer< TransactionId >::Pointer().

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

void decaf::lang::Pointer< T, REFCOUNTER >::reset

(

T *

value

)

[inline]

Resets the Pointer to hold the new value.

Before the new value is stored reset checks if the old value should be destroyed and if so calls delete. Call reset with a value of NULL is supported and acts to set this Pointer to a NULL pointer.

Parameters:

value

- The new value to contain.

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

template<typename T1 >

Pointer<T1, CounterType> decaf::lang::Pointer< T, REFCOUNTER >::staticCast

(

)

const [inline]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

void decaf::lang::Pointer< T, REFCOUNTER >::swap

(

Pointer< T, REFCOUNTER > &

value

)

throw () [inline]

Exception Safe Swap Function.

Parameters:

value

- the value to swap with this.

Referenced by decaf::lang::Pointer< TransactionId >::operator=(), and decaf::lang::Pointer< TransactionId >::swap().

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Friends And Related Function Documentation

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

bool operator!=	(	const Pointer< T, REFCOUNTER > &	left,
		const T *	right
	)		[friend]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

bool operator!=	(	const T *	left,
		const Pointer< T, REFCOUNTER > &	right
	)		[friend]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

bool operator==	(	const Pointer< T, REFCOUNTER > &	left,
		const T *	right
	)		[friend]

template<typename T, typename REFCOUNTER = decaf::util::concurrent::atomic::AtomicRefCounter>

bool operator==	(	const T *	left,
		const Pointer< T, REFCOUNTER > &	right
	)		[friend]

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

• src/main/decaf/lang/Pointer.h