ReferenceCountedObject Class Reference

A base class which provides methods for reference-counting. More...

#include <juce_ReferenceCountedObject.h>

Inheritance diagram for ReferenceCountedObject:

Collaboration diagram for ReferenceCountedObject:

Public Member Functions
void	decReferenceCount () noexcept
	Decreases the object's reference count. More...
bool	decReferenceCountWithoutDeleting () noexcept
	Decreases the object's reference count. More...
int	getReferenceCount () const noexcept
	Returns the object's current reference count. More...
void	incReferenceCount () noexcept
	Increments the object's reference count. More...

Protected Member Functions
	ReferenceCountedObject ()
	Creates the reference-counted object (with an initial ref count of zero). More...
virtual	~ReferenceCountedObject ()
	Destructor. More...
void	resetReferenceCount () noexcept
	Resets the reference count to zero without deleting the object. More...

Private Attributes
Atomic< int >	refCount

Friends
struct	ContainerDeletePolicy< ReferenceCountedObject >

Detailed Description

A base class which provides methods for reference-counting.

To add reference-counting to a class, derive it from this class, and use the ReferenceCountedObjectPtr class to point to it.

e.g.

class MyClass : public ReferenceCountedObject
{
    void foo();

    // This is a neat way of declaring a typedef for a pointer class,
    // rather than typing out the full templated name each time..
    typedef ReferenceCountedObjectPtr<MyClass> Ptr;
};

MyClass::Ptr p = new MyClass();
MyClass::Ptr p2 = p;
p = nullptr;
p2->foo();

Once a new ReferenceCountedObject has been assigned to a pointer, be careful not to delete the object manually.

This class uses an Atomic<int> value to hold the reference count, so that it the pointers can be passed between threads safely. For a faster but non-thread-safe version, use SingleThreadedReferenceCountedObject instead.

See also

ReferenceCountedObjectPtr, ReferenceCountedArray, SingleThreadedReferenceCountedObject

Constructor & Destructor Documentation

ReferenceCountedObject()

ReferenceCountedObject::ReferenceCountedObject ( )

inlineprotected

Creates the reference-counted object (with an initial ref count of zero).

~ReferenceCountedObject()

virtual ReferenceCountedObject::~ReferenceCountedObject ( )

inlineprotectedvirtual

Destructor.

References jassert.

Member Function Documentation

decReferenceCount()

void ReferenceCountedObject::decReferenceCount ( )

inlinenoexcept

Decreases the object's reference count.

If the count gets to zero, the object will be deleted.

References jassert.

decReferenceCountWithoutDeleting()

bool ReferenceCountedObject::decReferenceCountWithoutDeleting ( )

inlinenoexcept

Decreases the object's reference count.

If the count gets to zero, the object will not be deleted, but this method will return true, allowing the caller to take care of deletion.

References jassert.

getReferenceCount()

int ReferenceCountedObject::getReferenceCount ( ) const

inlinenoexcept

Returns the object's current reference count.

incReferenceCount()

void ReferenceCountedObject::incReferenceCount ( )

inlinenoexcept

Increments the object's reference count.

This is done automatically by the smart pointer, but is public just in case it's needed for nefarious purposes.

resetReferenceCount()

void ReferenceCountedObject::resetReferenceCount ( )

inlineprotectednoexcept

Resets the reference count to zero without deleting the object.

You should probably never need to use this!

Friends And Related Function Documentation

ContainerDeletePolicy< ReferenceCountedObject >

friend struct ContainerDeletePolicy< ReferenceCountedObject >

friend

Member Data Documentation

refCount

Atomic<int> ReferenceCountedObject::refCount

private

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

• juce_ReferenceCountedObject.h