This class registers all instances of TObject and its derived classes in a hash table.

The Add() and Remove() members are called from the TObject ctor and dtor, respectively. Using the Print() member one can see all currently active objects in the system. Using the resource (in .rootrc): Root.ObjectStat one can toggle this feature on or off.

Using the compile option R__NOSTATS one can de-active this feature for the entire system (for maximum performance in highly time critical applications).

The following output has been produced in a ROOT interactive session via the command gObjectTable->Print()

class                     cnt    on heap     size    total size    heap size
============================================================================
TKey                        4          4       72           288          288
TClass                     84         84       80          6720         6720
TDataMember               276        276       24          6624         6624
TObject                    11         11       12           132          132
TMethod                  1974       1974       64        126336       126336
TDataType                  34         34       56          1904         1904
TList                    2328       2328       36         83808        83808
TH1F                        1          1      448           448          448
TText                    2688       2688       56        150528       150528
TGaxis                      1          0      120           120            0
TAxis                       6          3       88           528          264
TBox                       57         57       52          2964         2964
TLine                     118        118       40          4720         4720
TWbox                       1          1       56            56           56
TArrow                      1          1       64            64           64
TPaveText                  59         59      124          7316         7316
TPave                       1          1       92            92           92
TFile                       1          1      136           136          136
TCanvas                     3          3      444          1332         1332
TPad                        1          1      312           312          312
TContextMenu                3          3       48           144          144
TMethodArg               2166       2166       44         95304        95304
TPaveLabel                  1          1      120           120          120
THtml                       1          1       32            32           32
TROOT                       1          0      208           208            0
TApplication                1          1       28            28           28
TFileHandler                1          1       20            20           20
TColor                    163        163       40          6520         6520
TStyle                      1          1      364           364          364
TRealData                 117        117       28          3276         3276
TBaseClass                 88         88       36          3168         3168
THashList                   5          5       40           200          200
THashTable                  5          5       36           180          180
TGeometry                   1          1       64            64           64
TLink                       7          7       60           420          420
TPostScript                 1          1      764           764          764
TMinuit                     1          1      792           792          792
TStopwatch                  1          0       56            56            0
TRootGuiFactory             1          1       28            28           28
TGX11                       1          1      172           172          172
TUnixSystem                 1          1      252           252          252
TSignalHandler              1          1       20            20           20
TOrdCollection              3          3       40           120          120
TEnv                        1          1       24            24           24
TCling                      1          1      208           208          208
TBenchmark                  1          1       52            52           52
TClassTable                 1          1       12            12           12
TObjectTable                1          1       12            12           12
----------------------------------------------------------------------------
Total:                  10225      10219     5976        506988       506340
============================================================================

Definition at line 37 of file TObjectTable.h.

Public Member Functions
	TObjectTable (Int_t tableSize=100)

	~TObjectTable ()
	Delete TObjectTable. More...

void	Add (TObject *obj)
	Add an object to the object table. More...

void *	CheckPtrAndWarn (const char msg, void vp)
	Issue a warning in case an object still appears in the table while it should not. More...

void	Delete (Option_t *opt="")
	Delete all objects stored in the TObjectTable. More...

Int_t	GetSize () const

Int_t	Instances () const

void	InstanceStatistics () const
	Print the object table. More...

void	Print (Option_t *option="") const
	Print the object table. More...

Bool_t	PtrIsValid (TObject *obj)

void	Remove (TObject *obj)
	Remove an object from the object table. More...

void	RemoveQuietly (TObject *obj)
	Remove an object from the object table. More...

void	Statistics ()

void	Terminate ()
	Deletes the object table (this static class function calls the dtor). More...

void	UpdateInstCount () const
	Histogram all objects according to their classes. More...

Public Member Functions inherited from TObject
	TObject ()

	TObject (const TObject &object)
	TObject copy ctor. More...

TObject &	operator= (const TObject &rhs)
	TObject assignment operator. More...

virtual	~TObject ()
	TObject destructor. More...

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action. More...

virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...

virtual void	Clear (Option_t *="")

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...

virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method. More...

virtual void	Copy (TObject &object) const
	Copy this to obj. More...

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object. More...

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects. More...

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs. More...

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current pad. More...

virtual void	Dump () const
	Dump contents of object on stdout. More...

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py). More...

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes. More...

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...

virtual UInt_t	GetUniqueID () const
	Return the unique object id. More...

virtual const char *	GetName () const
	Returns name of object. More...

virtual const char *	GetIconName () const
	Returns mime type name of object. More...

virtual Option_t *	GetOption () const

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py). More...

virtual const char *	GetTitle () const
	Returns title of object. More...

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out. More...

virtual ULong_t	Hash () const
	Return hash value for this object. More...

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname". More...

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl. More...

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas. More...

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...

virtual Bool_t	IsSortable () const

Bool_t	IsOnHeap () const

Bool_t	IsZombie () const

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...

virtual void	ls (Option_t *option="") const
	The ls function lists the contents of a class on stdout. More...

virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself. More...

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list. More...

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory. More...

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list. More...

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename. More...

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out". More...

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object. More...

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id. More...

virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...

void *	operator new (size_t sz)

void *	operator new[] (size_t sz)

void *	operator new (size_t sz, void *vp)

void *	operator new[] (size_t sz, void *vp)

void	operator delete (void *ptr)
	Operator delete. More...

void	operator delete[] (void *ptr)
	Operator delete []. More...

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f. More...

void	SetBit (UInt_t f)

void	ResetBit (UInt_t f)

Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

void	InvertBit (UInt_t f)

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message. More...

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message. More...

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message. More...

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message. More...

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message. More...

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...

Static Public Member Functions
static void	AddObj (TObject *obj)
	Add an object to the global object table gObjectTable. More...

Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...

static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...

static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...

Private Member Functions
Bool_t	HighWaterMark ()

void	Expand (Int_t newsize)
	Expand the object table. More...

Int_t	FindElement (TObject *obj)
	Find an object in the object table. More...

void	FixCollisions (Int_t index)
	Rehash the object table in case an object has been removed. More...

	TObjectTable (const TObjectTable &)

TObjectTable &	operator= (const TObjectTable &)

Private Attributes
TObject **	fTable

Int_t	fSize

Int_t	fTally

Additional Inherited Members
Public Types inherited from TObject
enum	EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }

enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }

Protected Member Functions inherited from TObject
void	MakeZombie ()

virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected). More...

#include <TObjectTable.h>

Inheritance diagram for TObjectTable:

Collaboration diagram for TObjectTable:

Constructor & Destructor Documentation

TObjectTable::TObjectTable ( const TObjectTable & )

private

Referenced by AddObj().

TObjectTable::TObjectTable ( Int_t tableSize = 100 )

TObjectTable::~TObjectTable ( )

Delete TObjectTable.

Definition at line 108 of file TObjectTable.cxx.

Member Function Documentation

void TObjectTable::Add ( TObject * obj )

Add an object to the object table.

Definition at line 145 of file TObjectTable.cxx.

Referenced by AddObj(), Expand(), and TCollection::GarbageCollect().

void TObjectTable::AddObj ( TObject * op )

static

Add an object to the global object table gObjectTable.

If the global table does not exist create it first. This member function may only be used by TObject::TObject. Use Add() to add objects to any other TObjectTable object. This is a static function.

Definition at line 169 of file TObjectTable.cxx.

Referenced by ClassImp(), and TObject::TObject().

void * TObjectTable::CheckPtrAndWarn	(	const char *	msg,
		void *	vp
	)

Issue a warning in case an object still appears in the table while it should not.

Definition at line 394 of file TObjectTable.cxx.

void TObjectTable::Delete ( Option_t * opt = "" )

virtual

Delete all objects stored in the TObjectTable.

Reimplemented from TObject.

Definition at line 193 of file TObjectTable.cxx.

Referenced by TCollection::EmptyGarbageCollection().

void TObjectTable::Expand ( Int_t newsize )

private

Expand the object table.

Definition at line 319 of file TObjectTable.cxx.

Referenced by Add().

Int_t TObjectTable::FindElement ( TObject * op )

private

Find an object in the object table.

Returns the slot where to put the object. To test if the object is actually already in the table use PtrIsValid().

Definition at line 273 of file TObjectTable.cxx.

Referenced by Add(), CheckPtrAndWarn(), FixCollisions(), PtrIsValid(), Remove(), and RemoveQuietly().

void TObjectTable::FixCollisions ( Int_t index )

private

Rehash the object table in case an object has been removed.

Definition at line 297 of file TObjectTable.cxx.

Referenced by Remove(), and RemoveQuietly().

Int_t TObjectTable::GetSize ( ) const

inline

Definition at line 60 of file TObjectTable.h.

Bool_t TObjectTable::HighWaterMark ( )

inlineprivate

Definition at line 77 of file TObjectTable.h.

Referenced by Add().

Int_t TObjectTable::Instances ( ) const

inline

Definition at line 61 of file TObjectTable.h.

void TObjectTable::InstanceStatistics ( ) const

Print the object table.

Definition at line 337 of file TObjectTable.cxx.

Referenced by Print(), and Terminate().

TObjectTable& TObjectTable::operator= ( const TObjectTable & )

private

void TObjectTable::Print ( Option_t * option = "" ) const

virtual

Print the object table.

If option ="all" prints the list of all objects with the format object number, pointer, class name, object name

Reimplemented from TObject.

Definition at line 118 of file TObjectTable.cxx.

Referenced by Statistics().

Bool_t TObjectTable::PtrIsValid ( TObject * obj )

inline

Definition at line 80 of file TObjectTable.h.

Referenced by THashTable::Rehash().

void TObjectTable::Remove ( TObject * obj )

Remove an object from the object table.

Definition at line 207 of file TObjectTable.cxx.

Referenced by CheckPtrAndWarn().

void TObjectTable::RemoveQuietly ( TObject * op )

Remove an object from the object table.

If op is 0 or not in the table don't complain. Currently only used by the TClonesArray dtor. Should not be used anywhere else, except in places where "special" allocation and de-allocation tricks are performed.

Definition at line 241 of file TObjectTable.cxx.

Referenced by TClonesArray::Expand(), TClonesArray::ExpandCreate(), TClonesArray::operator=(), TClonesArray::~TClonesArray(), and TObject::~TObject().

void TObjectTable::Statistics ( )

inline

Definition at line 67 of file TObjectTable.h.

void TObjectTable::Terminate ( void )

Deletes the object table (this static class function calls the dtor).

Definition at line 262 of file TObjectTable.cxx.

void TObjectTable::UpdateInstCount ( ) const

Histogram all objects according to their classes.

Definition at line 372 of file TObjectTable.cxx.

Referenced by InstanceStatistics().