This class registers for all classes their name, id and dictionary function in a hash table.

Classes are automatically added by the ctor of a special init class when a global of this init class is initialized when the program starts (see the ClassImp macro).

All functions in TClassTable are thread-safe.

Definition at line 37 of file TClassTable.h.

Classes
class	NormalizeThenLock

Public Types
enum	{ kNoStreamer = 0x01 , kNoInputOperator = 0x02 , kAutoStreamer = 0x04 , kHasVersion = 0x08 , kHasCustomStreamerMember = 0x10 }

Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff }

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

enum	EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }

enum	EStatusBits { kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) , kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 )) }

Public Member Functions
	~TClassTable ()
	TClassTable singleton is deleted in Terminate().

int	Classes ()

TClass *	IsA () const override

void	Print (Option_t *option="") const override
	Print the class table.

void	Streamer (TBuffer &) override
	Stream an object of class TObject.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor.

	TObject (const TObject &object)
	TObject copy ctor.

virtual	~TObject ()
	TObject destructor.

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

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

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

ULong_t	CheckedHash ()
	Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.

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

virtual void	Clear (Option_t *="")

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

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

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

virtual void	Delete (Option_t *option="")
	Delete this object.

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

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

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

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad with: `gROOT->SetSelectedPad(c1)`.

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

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

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

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

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

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

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

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

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

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

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

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

virtual Option_t *	GetOption () const

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

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

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

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

Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.

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

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

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

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

void	InvertBit (UInt_t f)

Bool_t	IsDestructed () const
	IsDestructed.

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

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

R__ALWAYS_INLINE Bool_t	IsOnHeap () const

virtual Bool_t	IsSortable () const

R__ALWAYS_INLINE Bool_t	IsZombie () const

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

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).

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

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

void	operator delete (void *ptr)
	Operator delete.

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

void *	operator new (size_t sz)

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

void *	operator new[] (size_t sz)

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

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

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

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

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

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

void	ResetBit (UInt_t f)

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

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

void	SetBit (UInt_t f)

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

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

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

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

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

R__ALWAYS_INLINE Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

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

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

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

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

Static Public Member Functions
static void	Add (const char *cname, Version_t id, const std::type_info &info, DictFuncPtr_t dict, Int_t pragmabits)
	Add a class to the class table (this is a static function).

static void	Add (TProtoClass *protoClass)
	Add a class to the class table (this is a static function).

static ROOT::TClassAlt *	AddAlternate (const char normname, const char alternate)

static char *	At (UInt_t index)
	Returns class at index from sorted class table.

static Bool_t	Check (const char *cname, std::string &normname)

static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static DictFuncPtr_t	GetDict (const char *cname)
	Given the class name returns the Dictionary() function of a class (uses hash of name).

static DictFuncPtr_t	GetDict (const std::type_info &info)
	Given the std::type_info returns the Dictionary() function of a class (uses hash of std::type_info::name()).

static DictFuncPtr_t	GetDictNorm (const char *cname)
	Given the normalized class name returns the Dictionary() function of a class (uses hash of name).

static Version_t	GetID (const char *cname)
	Returns the ID of a class.

static Int_t	GetPragmaBits (const char *name)
	Returns the pragma bits as specified in the LinkDef.h file.

static TProtoClass *	GetProto (const char *cname)
	Given the class name returns the TClassProto object for the class.

static TProtoClass *	GetProtoNorm (const char *cname)
	Given the class normalized name returns the TClassProto object for the class.

static void	Init ()

static char *	Next ()
	Returns next class from sorted class table.

static void	PrintTable ()
	Print the class table.

static void	Remove (const char *cname)
	Remove a class from the class table.

static void	RemoveAlternate (ROOT::TClassAlt *alt)

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

Static Public Member Functions inherited from TObject
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

static Longptr_t	GetDtorOnly ()
	Return destructor only flag.

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

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

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

Private Types
typedef ROOT::TMapTypeToClassRec	IdMap_t

Private Member Functions
	TClassTable ()
	TClassTable is a singleton (i.e. only one can exist per application).

Static Private Member Functions
static Bool_t	CheckClassTableInit ()
	Return true fs the table exist.

static ROOT::TClassRec *	FindElement (const char *cname, Bool_t insert)
	Find a class by name in the class table (using hash of name).

static void	SortTable ()
	Sort the class table by ascending class ID's.

Static Private Attributes
static ROOT::TClassAlt **	fgAlternate

static UInt_t	fgCursor

static IdMap_t *	fgIdMap

static UInt_t	fgSize

static Bool_t	fgSorted

static ROOT::TClassRec **	fgSortedTable

static ROOT::TClassRec **	fgTable

static std::atomic< UInt_t >	fgTally

Friends
void	ROOT::ResetClassVersion (TClass , const char , Short_t)

class	TROOT

Additional Inherited Members
Protected Types inherited from TObject
enum	{ kOnlyPrepStep = (1ULL << ( 3 )) }

Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected).

void	MakeZombie ()

#include <TClassTable.h>

Inheritance diagram for TClassTable:

[legend]

Member Typedef Documentation

◆ IdMap_t

typedef ROOT::TMapTypeToClassRec TClassTable::IdMap_t

private

Definition at line 43 of file TClassTable.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enumerator
kNoStreamer
kNoInputOperator
kAutoStreamer
kHasVersion
kHasCustomStreamerMember

Definition at line 64 of file TClassTable.h.

Constructor & Destructor Documentation

◆ TClassTable()

TClassTable::TClassTable ( )

private

TClassTable is a singleton (i.e. only one can exist per application).

Definition at line 261 of file TClassTable.cxx.

◆ ~TClassTable()

TClassTable::~TClassTable ( )

TClassTable singleton is deleted in Terminate().

Definition at line 287 of file TClassTable.cxx.

Member Function Documentation

◆ Add() [1/2]

void TClassTable::Add	(	const char *	cname,
		Version_t	id,
		const std::type_info &	info,
		DictFuncPtr_t	dict,
		Int_t	pragmabits
	)

static

Add a class to the class table (this is a static function).

Note that the given cname must be already normalized.

Definition at line 395 of file TClassTable.cxx.

◆ Add() [2/2]

void TClassTable::Add ( TProtoClass * protoClass )

static

Add a class to the class table (this is a static function).

Definition at line 455 of file TClassTable.cxx.

◆ AddAlternate()

ROOT::TClassAlt * TClassTable::AddAlternate	(	const char *	normname,
		const char *	alternate
	)

static

Definition at line 504 of file TClassTable.cxx.

◆ At()

char * TClassTable::At ( UInt_t index )

static

Returns class at index from sorted class table.

Don't use this iterator while modifying the class table. The class table can be modified when making calls like TClass::GetClass(), etc. Returns 0 if index points beyond last class name.

Definition at line 371 of file TClassTable.cxx.

◆ Check()

Bool_t TClassTable::Check	(	const char *	cname,
		std::string &	normname
	)

static

Definition at line 560 of file TClassTable.cxx.

◆ CheckClassTableInit()

Bool_t TClassTable::CheckClassTableInit ( )

inlinestaticprivate

Return true fs the table exist.

If the table does not exist but the delayed list does, then create the table and return true.

Definition at line 305 of file TClassTable.cxx.

◆ Class()

static TClass * TClassTable::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * TClassTable::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t TClassTable::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 94 of file TClassTable.h.

◆ Classes()

int TClassTable::Classes ( )

Definition at line 385 of file TClassTable.cxx.

◆ DeclFileName()

static const char * TClassTable::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 94 of file TClassTable.h.

◆ FindElement()

TClassRec * TClassTable::FindElement	(	const char *	cname,
		Bool_t	insert
	)

staticprivate

Find a class by name in the class table (using hash of name).

Returns 0 if the class is not in the table. Unless arguments insert is true in which case a new entry is created and returned. cname must be the normalized name of the class.

Definition at line 622 of file TClassTable.cxx.

◆ GetDict() [1/2]

DictFuncPtr_t TClassTable::GetDict ( const char * cname )

static

Given the class name returns the Dictionary() function of a class (uses hash of name).

Definition at line 677 of file TClassTable.cxx.

◆ GetDict() [2/2]

DictFuncPtr_t TClassTable::GetDict ( const std::type_info & info )

static

Given the std::type_info returns the Dictionary() function of a class (uses hash of std::type_info::name()).

Definition at line 699 of file TClassTable.cxx.

◆ GetDictNorm()

DictFuncPtr_t TClassTable::GetDictNorm ( const char * cname )

static

Given the normalized class name returns the Dictionary() function of a class (uses hash of name).

Definition at line 724 of file TClassTable.cxx.

◆ GetID()

Version_t TClassTable::GetID ( const char * cname )

static

Returns the ID of a class.

Definition at line 644 of file TClassTable.cxx.

◆ GetPragmaBits()

Int_t TClassTable::GetPragmaBits ( const char * name )

static

Returns the pragma bits as specified in the LinkDef.h file.

Definition at line 660 of file TClassTable.cxx.

◆ GetProto()

TProtoClass * TClassTable::GetProto ( const char * cname )

static

Given the class name returns the TClassProto object for the class.

(uses hash of name).

Definition at line 749 of file TClassTable.cxx.

◆ GetProtoNorm()

TProtoClass * TClassTable::GetProtoNorm ( const char * cname )

static

Given the class normalized name returns the TClassProto object for the class.

(uses hash of name).

Definition at line 777 of file TClassTable.cxx.

◆ Init()

void TClassTable::Init ( )

static

Definition at line 387 of file TClassTable.cxx.

◆ IsA()

TClass * TClassTable::IsA ( ) const

inlineoverridevirtual

Returns: TClass describing current object

Reimplemented from TObject.

Definition at line 94 of file TClassTable.h.

◆ Next()

char * TClassTable::Next ( )

static

Returns next class from sorted class table.

Don't use this iterator while modifying the class table. The class table can be modified when making calls like TClass::GetClass(), etc.

Definition at line 814 of file TClassTable.cxx.

◆ Print()

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

overridevirtual

Print the class table.

Before printing the table is sorted alphabetically. Only classes specified in option are listed. The default is to list all classes. Standard wildcarding notation supported.

Reimplemented from TObject.

Definition at line 325 of file TClassTable.cxx.

◆ PrintTable()

void TClassTable::PrintTable ( )

static

Print the class table.

Before printing the table is sorted alphabetically.

Definition at line 830 of file TClassTable.cxx.

◆ Remove()

void TClassTable::Remove ( const char * cname )

static

Remove a class from the class table.

This happens when a shared library is unloaded (i.e. the dtor's of the global init objects are called).

Definition at line 588 of file TClassTable.cxx.

◆ RemoveAlternate()

void TClassTable::RemoveAlternate ( ROOT::TClassAlt * alt )

static

Definition at line 532 of file TClassTable.cxx.

◆ SortTable()

void TClassTable::SortTable ( )

staticprivate

Sort the class table by ascending class ID's.

Definition at line 864 of file TClassTable.cxx.

◆ Streamer()

void TClassTable::Streamer ( TBuffer & R__b )

overridevirtual

Stream an object of class TObject.

Reimplemented from TObject.

◆ StreamerNVirtual()

void TClassTable::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 94 of file TClassTable.h.

◆ Terminate()

void TClassTable::Terminate ( )

static

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

Definition at line 885 of file TClassTable.cxx.

Friends And Related Symbol Documentation

◆ ROOT::ResetClassVersion

void ROOT::ResetClassVersion	(	TClass *	,
		const char *	,
		Short_t
	)

friend

◆ TROOT

friend class TROOT

friend

Definition at line 40 of file TClassTable.h.

Member Data Documentation

◆ fgAlternate

TClassAlt ** TClassTable::fgAlternate

staticprivate

Definition at line 46 of file TClassTable.h.

◆ fgCursor

UInt_t TClassTable::fgCursor

staticprivate

Definition at line 53 of file TClassTable.h.

◆ fgIdMap

TClassTable::IdMap_t * TClassTable::fgIdMap

staticprivate

Definition at line 49 of file TClassTable.h.

◆ fgSize

UInt_t TClassTable::fgSize

staticprivate

Definition at line 50 of file TClassTable.h.

◆ fgSorted

Bool_t TClassTable::fgSorted

staticprivate

Definition at line 52 of file TClassTable.h.

◆ fgSortedTable

TClassRec ** TClassTable::fgSortedTable

staticprivate

Definition at line 48 of file TClassTable.h.

◆ fgTable

TClassRec ** TClassTable::fgTable

staticprivate

Definition at line 47 of file TClassTable.h.

◆ fgTally

std::atomic< UInt_t > TClassTable::fgTally

staticprivate

Definition at line 51 of file TClassTable.h.

core/cont/inc/TClassTable.h

core/cont/src/TClassTable.cxx

Classes

Public Types

Public Member Functions

Static Public Member Functions

Private Types

Private Member Functions

Static Private Member Functions

Static Private Attributes

Friends

Additional Inherited Members

Member Typedef Documentation

◆ IdMap_t

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ TClassTable()

◆ ~TClassTable()

Member Function Documentation

◆ Add() [1/2]

◆ Add() [2/2]

◆ AddAlternate()

◆ At()

◆ Check()

◆ CheckClassTableInit()

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ Classes()

◆ DeclFileName()

◆ FindElement()

◆ GetDict() [1/2]

◆ GetDict() [2/2]

◆ GetDictNorm()

◆ GetID()

◆ GetPragmaBits()

◆ GetProto()

◆ GetProtoNorm()

◆ Init()

◆ IsA()

◆ Next()

◆ Print()

◆ PrintTable()

◆ Remove()

◆ RemoveAlternate()

◆ SortTable()

◆ Streamer()

◆ StreamerNVirtual()

◆ Terminate()

Friends And Related Symbol Documentation

◆ ROOT::ResetClassVersion

◆ TROOT

Member Data Documentation

◆ fgAlternate

◆ fgCursor

◆ fgIdMap

◆ fgSize

◆ fgSorted

◆ fgSortedTable

◆ fgTable

◆ fgTally