UpdateHandler implements IUpdateManager and IUpdateHandler to handle dependencies between objects to store and forward messages to dependent objects. More...

#include <updatehandler.h>

Inheritance diagram for UpdateHandler:

Public Member Functions
	UpdateHandler ()

	~UpdateHandler () SMTG_OVERRIDE

tresult	addDependent (FUnknown object, IDependent dependent) SMTG_OVERRIDE
	register

tresult	removeDependent (FUnknown object, IDependent dependent, size_t &earseCount)
	unregister

tresult	removeDependent (FUnknown object, IDependent dependent) SMTG_OVERRIDE

tresult	triggerUpdates (FUnknown *object, int32 message) SMTG_OVERRIDE
	send

tresult	deferUpdates (FUnknown *object, int32 message) SMTG_OVERRIDE
	send

tresult	cancelUpdates (FUnknown *object) SMTG_OVERRIDE
	cancel pending messages send by

tresult	triggerDeferedUpdates (FUnknown *object=nullptr) SMTG_OVERRIDE
	send pending messages send by

size_t	countDependencies (FUnknown *object=nullptr)

	OBJ_METHODS (UpdateHandler, FObject) FUNKNOWN_METHODS2(IUpdateHandler

Public Member Functions inherited from FObject
	FObject ()=default
	default constructor...

	FObject (const FObject &)

FObject &	operator= (const FObject &)
	overloads operator "=" as the reference assignment

virtual	~FObject ()
	destructor...

virtual FClassID	isA () const
	a local alternative to getFClassID ()

virtual bool	isA (FClassID s) const
	evaluates if the passed ID is of the FObject type

virtual bool	isTypeOf (FClassID s, bool=true) const
	evaluates if the passed ID is of the FObject type

int32	getRefCount ()
	returns the current interface reference count

FUnknown *	unknownCast ()
	get FUnknown interface from object

tresult	queryInterface (const TUID _iid, void **obj) SMTG_OVERRIDE
	please refer to FUnknown::queryInterface ()

uint32	addRef () SMTG_OVERRIDE
	please refer to FUnknown::addref ()

uint32	release () SMTG_OVERRIDE
	please refer to FUnknown::release ()

void	update (FUnknown *, int32) SMTG_OVERRIDE
	empty virtual method that should be overridden by derived classes for data updates upon changes

virtual void	addDependent (IDependent *dep)
	adds dependency to the object

virtual void	removeDependent (IDependent *dep)
	removes dependency from the object

virtual void	changed (int32 msg=kChanged)
	Inform all dependents, that the object has changed.

virtual void	deferUpdate (int32 msg=kChanged)
	Similar to triggerUpdates, except only delivered in idle (usefull in collecting updates).

virtual void	updateDone (int32)
	empty virtual method that should be overridden by derived classes

virtual bool	isEqualInstance (FUnknown *d)

Public Attributes
	IUpdateManager

FObject SINGLETON(UpdateHandler) private Steinberg::Base::Thread::FLock	lock

Update::Table *	table = nullptr

Additional Inherited Members
Static Public Member Functions inherited from FObject
static FClassID	getFClassID ()
	return Class ID as an ASCII string (statically)

static void	setUpdateHandler (IUpdateHandler *handler)
	set method for the local attribute

static IUpdateHandler *	getUpdateHandler ()
	get method for the local attribute

static bool	classIDsEqual (FClassID ci1, FClassID ci2)
	compares (evaluates) 2 class IDs

static FObject *	unknownToObject (FUnknown *unknown)
	pointer conversion from FUnknown to FObject

template<class Class >
static IPtr< Class >	fromUnknown (FUnknown *unknown)
	convert from FUnknown to FObject

Static Public Attributes inherited from FObject
static const FUID	iid
	Special UID that is used to cast an FUnknown pointer to a FObject.

Static Public Attributes inherited from IUpdateManager
static const FUID	iid

Protected Attributes inherited from FObject
int32	refCount = 1
	COM-model local reference count.

Static Protected Attributes inherited from FObject
static IUpdateHandler *	gUpdateHandler = nullptr

Detailed Description

UpdateHandler implements IUpdateManager and IUpdateHandler to handle dependencies between objects to store and forward messages to dependent objects.

This implementation is thread save, so objects can send message, add or remove dependents from different threads. Do do so it uses mutex, so be aware of locking.

Constructor & Destructor Documentation

UpdateHandler ( )

~UpdateHandler ( )

Member Function Documentation

tresult addDependent	(	FUnknown *	object,
		IDependent *	dependent
	)

register

Parameters

dependent	to get messages from
object

tresult removeDependent	(	FUnknown *	object,
		IDependent *	dependent,
		size_t &	earseCount
	)

unregister

Parameters

dependent	to get no messages from
object

tresult removeDependent	(	FUnknown *	object,
		IDependent *	dependent
	)

tresult triggerUpdates	(	FUnknown *	object,
		int32	message
	)

send

Parameters

message	to all dependents of
object	immediately

tresult deferUpdates	(	FUnknown *	object,
		int32	message
	)

send

Parameters

message	to all dependents of
object	when idle

tresult cancelUpdates ( FUnknown * object )

virtual

cancel pending messages send by

Parameters

object or by any if object is 0

Implements IUpdateManager.

tresult triggerDeferedUpdates ( FUnknown * object = nullptr )

virtual

send pending messages send by

Parameters

object or by any if object is 0

Implements IUpdateManager.

size_t countDependencies ( FUnknown * object = nullptr )

OBJ_METHODS	(	UpdateHandler	,
		FObject
	)

Member Data Documentation

IUpdateManager

FObject SINGLETON (UpdateHandler) private Steinberg::Base::Thread::FLock lock

Update::Table* table = nullptr

Public Member Functions

Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation