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Reference Guide
THashList Class Reference

THashList implements a hybrid collection class consisting of a hash table and a list to store TObject's.

The hash table is used for quick access and lookup of objects while the list allows the objects to be ordered. The hash value is calculated using the value returned by the TObject's Hash() function. Each class inheriting from TObject can override Hash() as it sees fit.

Definition at line 34 of file THashList.h.

Public Member Functions

 THashList (Int_t capacity=TCollection::kInitHashTableCapacity, Int_t rehash=0)
 Create a THashList object. More...
 
 THashList (TObject *parent, Int_t capacity=TCollection::kInitHashTableCapacity, Int_t rehash=0)
 For backward compatibility only. Use other ctor. More...
 
virtual ~THashList ()
 Delete a hashlist. More...
 
void AddAfter (const TObject *after, TObject *obj)
 Insert object after object after in the list. More...
 
void AddAfter (TObjLink *after, TObject *obj)
 Insert object after object after in the list. More...
 
void AddAt (TObject *obj, Int_t idx)
 Insert object at location idx in the list. More...
 
void AddBefore (const TObject *before, TObject *obj)
 Insert object before object before in the list. More...
 
void AddBefore (TObjLink *before, TObject *obj)
 Insert object before object before in the list. More...
 
void AddFirst (TObject *obj)
 Add object at the beginning of the list. More...
 
void AddFirst (TObject *obj, Option_t *opt)
 Add object at the beginning of the list and also store option. More...
 
void AddLast (TObject *obj)
 Add object at the end of the list. More...
 
void AddLast (TObject *obj, Option_t *opt)
 Add object at the end of the list and also store option. More...
 
Float_t AverageCollisions () const
 Return the average collision rate. More...
 
void Clear (Option_t *option="")
 Remove all objects from the list. More...
 
void Delete (Option_t *option="")
 Remove all objects from the list AND delete all heap based objects. More...
 
TObjectFindObject (const char *name) const
 Find object using its name. More...
 
TObjectFindObject (const TObject *obj) const
 Find object using its hash value (returned by its Hash() member). More...
 
const TListGetListForObject (const char *name) const
 Return the THashTable's list (bucket) in which obj can be found based on its hash; see THashTable::GetListForObject(). More...
 
const TListGetListForObject (const TObject *obj) const
 Return the THashTable's list (bucket) in which obj can be found based on its hash; see THashTable::GetListForObject(). More...
 
void RecursiveRemove (TObject *obj)
 Remove object from this collection and recursively remove the object from all other objects (and collections). More...
 
void Rehash (Int_t newCapacity)
 Rehash the hashlist. More...
 
TObjectRemove (TObject *obj)
 Remove object from the list. More...
 
TObjectRemove (TObjLink *lnk)
 Remove object via its objlink from the list. More...
 
bool UseRWLock ()
 Set this collection to use a RW lock upon access, making it thread safe. More...
 
- Public Member Functions inherited from TList
 TList ()
 
 TList (TObject *)
 
virtual ~TList ()
 Delete the list. More...
 
virtual void Add (TObject *obj)
 
virtual void Add (TObject *obj, Option_t *opt)
 
virtual TObjectAfter (const TObject *obj) const
 Returns the object after object obj. More...
 
virtual TObjectAt (Int_t idx) const
 Returns the object at position idx. Returns 0 if idx is out of range. More...
 
virtual TObjectBefore (const TObject *obj) const
 Returns the object before object obj. More...
 
virtual TObjectFirst () const
 Return the first object in the list. Returns 0 when list is empty. More...
 
virtual TObjLinkFirstLink () const
 
virtual TObject ** GetObjectRef (const TObject *obj) const
 Return address of pointer to obj. More...
 
Bool_t IsAscending ()
 
virtual TObjectLast () const
 Return the last object in the list. Returns 0 when list is empty. More...
 
virtual TObjLinkLastLink () const
 
virtual TIteratorMakeIterator (Bool_t dir=kIterForward) const
 Return a list iterator. More...
 
TObjectRemove (const TObjLinkPtr_t &lnk)
 
virtual void RemoveLast ()
 Remove the last object of the list. More...
 
virtual void Sort (Bool_t order=kSortAscending)
 Sort linked list. More...
 
- Public Member Functions inherited from TSeqCollection
virtual ~TSeqCollection ()
 
virtual Int_t GetLast () const
 Returns index of last object in collection. More...
 
virtual Int_t IndexOf (const TObject *obj) const
 Return index of object in collection. More...
 
virtual Bool_t IsSorted () const
 
Int_t LastIndex () const
 
Long64_t Merge (TCollection *list)
 Merge this collection with all collections coming in the input list. More...
 
virtual void RemoveAfter (TObject *after)
 
virtual TObjectRemoveAt (Int_t idx)
 
virtual void RemoveBefore (TObject *before)
 
virtual void RemoveFirst ()
 
void UnSort ()
 
- Public Member Functions inherited from TCollection
virtual ~TCollection ()
 TNamed destructor. More...
 
virtual void AddAll (const TCollection *col)
 Add all objects from collection col to this collection. More...
 
void AddVector (TObject *obj1,...)
 Add all arguments to the collection. More...
 
Bool_t AssertClass (TClass *cl) const
 Make sure all objects in this collection inherit from class cl. More...
 
TIter begin () const
 
void Browse (TBrowser *b)
 Browse this collection (called by TBrowser). More...
 
Int_t Capacity () const
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an collection using the Streamer facility. More...
 
Int_t Compare (const TObject *obj) const
 Compare two TCollection objects. More...
 
Bool_t Contains (const char *name) const
 
Bool_t Contains (const TObject *obj) const
 
virtual void Draw (Option_t *option="")
 Draw all objects in this collection. More...
 
virtual void Dump () const
 Dump all objects in this collection. More...
 
TIter end () const
 
virtual Int_t GetEntries () const
 
virtual const char * GetName () const
 Return name of this collection. More...
 
virtual Int_t GetSize () const
 Return the capacity of the collection, i.e. More...
 
virtual Int_t GrowBy (Int_t delta) const
 Increase the collection's capacity by delta slots. More...
 
ULong_t Hash () const
 Return hash value for this object. More...
 
Bool_t IsArgNull (const char *where, const TObject *obj) const
 Returns true if object is a null pointer. More...
 
virtual Bool_t IsEmpty () const
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
 
Bool_t IsOwner () const
 
Bool_t IsSortable () const
 
R__ALWAYS_INLINE Bool_t IsUsingRWLock () const
 
virtual void ls (Option_t *option="") const
 List (ls) all objects in this collection. More...
 
virtual TIteratorMakeReverseIterator () const
 
virtual Bool_t Notify ()
 'Notify' all objects in this collection. More...
 
TObjectoperator() (const char *name) const
 Find an object in this collection by name. More...
 
virtual void Paint (Option_t *option="")
 Paint all objects in this collection. More...
 
virtual void Print (Option_t *option="") const
 Default print for collections, calls Print(option, 1). More...
 
virtual void Print (Option_t *option, Int_t recurse) const
 Print the collection header and its elements. More...
 
virtual void Print (Option_t *option, const char *wildcard, Int_t recurse=1) const
 Print the collection header and its elements that match the wildcard. More...
 
virtual void Print (Option_t *option, TPRegexp &regexp, Int_t recurse=1) const
 Print the collection header and its elements that match the regexp. More...
 
virtual void RemoveAll (TCollection *col)
 Remove all objects in collection col from this collection. More...
 
void RemoveAll ()
 
void SetCurrentCollection ()
 Set this collection to be the globally accesible collection. More...
 
void SetName (const char *name)
 
virtual void SetOwner (Bool_t enable=kTRUE)
 Set whether this collection is the owner (enable==true) of its content. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
 Write all objects in this collection. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
 Write all objects in this collection. More...
 
- Public Member Functions inherited from TObject
 TObject ()
 TObject constructor. More...
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
virtual ~TObject ()
 TObject destructor. 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...
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad. More...
 
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. More...
 
virtual const char * ClassName () const
 Returns name of class to which the object belongs. 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 DrawClass () const
 Draw class inheritance tree of the class to which this object belongs. More...
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad). More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. 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 void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message. More...
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object. More...
 
virtual const char * GetIconName () const
 Returns mime type name of object. More...
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py). More...
 
virtual Option_tGetOption () const
 
virtual const char * GetTitle () const
 Returns title of object. More...
 
virtual UInt_t GetUniqueID () const
 Return the unique object id. More...
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out. More...
 
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. More...
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message. 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...
 
void InvertBit (UInt_t f)
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory). More...
 
R__ALWAYS_INLINE Bool_t IsOnHeap () const
 
R__ALWAYS_INLINE Bool_t IsZombie () const
 
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...
 
void operator delete (void *ptr)
 Operator delete. More...
 
void operator delete[] (void *ptr)
 Operator delete []. More...
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator. 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...
 
void ResetBit (UInt_t f)
 
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...
 
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)
 
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 SysError (const char *method, const char *msgfmt,...) const
 Issue system error message. More...
 
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. More...
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message. More...
 

Protected Attributes

THashTablefTable
 
- Protected Attributes inherited from TList
Bool_t fAscending
 cache to speedup sequential calling of Before() and After() functions More...
 
TObjLinkWeakPtr_t fCache
 pointer to last entry in linked list More...
 
TObjLinkPtr_t fFirst
 
TObjLinkPtr_t fLast
 pointer to first entry in linked list More...
 
- Protected Attributes inherited from TSeqCollection
Bool_t fSorted
 
- Protected Attributes inherited from TCollection
TString fName
 
Int_t fSize
 

Private Member Functions

 THashList (const THashList &)
 
THashListoperator= (const THashList &)
 

Additional Inherited Members

- Public Types inherited from TList
typedef TListIter Iterator_t
 
- Public Types inherited from TCollection
enum  { kInitCapacity = 16, kInitHashTableCapacity = 17 }
 
- Public Types inherited from TObject
enum  {
  kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kInconsistent = 0x08000000,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = BIT(3) }
 
enum  EStatusBits {
  kCanDelete = BIT(0), kMustCleanup = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5),
  kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13)
}
 
- Static Public Member Functions inherited from TSeqCollection
static Int_t ObjCompare (TObject *a, TObject *b)
 Compare to objects in the collection. Use member Compare() of object a. More...
 
static void QSort (TObject **a, Int_t first, Int_t last)
 Sort array of TObject pointers using a quicksort algorithm. More...
 
static void QSort (TObject **a, TObject **b, Int_t first, Int_t last)
 
static void QSort (TObject **a, Int_t nBs, TObject ***b, Int_t first, Int_t last)
 Sort array a of TObject pointers using a quicksort algorithm. More...
 
- Static Public Member Functions inherited from TCollection
static void EmptyGarbageCollection ()
 Do the garbage collection. More...
 
static void GarbageCollect (TObject *obj)
 Add to the list of things to be cleaned up. More...
 
static TCollectionGetCurrentCollection ()
 Return the globally accessible collection. More...
 
static void StartGarbageCollection ()
 Set up for garbage collection. More...
 
- Static Public Member Functions inherited from TObject
static Long_t GetDtorOnly ()
 Return destructor only flag. More...
 
static Bool_t GetObjectStat ()
 Get status of object stat flag. More...
 
static void SetDtorOnly (void *obj)
 Set destructor only flag. More...
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable. More...
 
- Protected Types inherited from TList
using TObjLinkPtr_t = std::shared_ptr< TObjLink >
 
using TObjLinkWeakPtr_t = std::weak_ptr< TObjLink >
 
- Protected Types inherited from TCollection
enum  EStatusBits { kIsOwner = BIT(14), kUseRWLock = BIT(16) }
 
- Protected Member Functions inherited from TList
TObjLinkPtr_tDoSort (TObjLinkPtr_t *head, Int_t n)
 Sort linked list. More...
 
TObjLinkFindLink (const TObject *obj, Int_t &idx) const
 Returns the TObjLink object that contains object obj. More...
 
void InsertAfter (const TObjLinkPtr_t &newlink, const TObjLinkPtr_t &prev)
 Insert a new link in the chain. More...
 
TObjLinkLinkAt (Int_t idx) const
 sorting order (when calling Sort() or for TSortedList) More...
 
Bool_t LnkCompare (const TObjLinkPtr_t &l1, const TObjLinkPtr_t &l2)
 Compares the objects stored in the TObjLink objects. More...
 
TObjLinkPtr_t NewLink (TObject *obj, const TObjLinkPtr_t &prev=nullptr)
 Return a new TObjLink. More...
 
TObjLinkPtr_t NewLink (TObject *obj, TObjLink *prev)
 
TObjLinkPtr_t NewOptLink (TObject *obj, Option_t *opt, const TObjLinkPtr_t &prev=nullptr)
 Return a new TObjOptLink (a TObjLink that also stores the option). More...
 
TObjLinkPtr_t NewOptLink (TObject *obj, Option_t *opt, TObjLink *prev)
 
- Protected Member Functions inherited from TSeqCollection
 TSeqCollection ()
 
virtual void Changed ()
 
- Protected Member Functions inherited from TCollection
 TCollection ()
 
virtual const char * GetCollectionEntryName (TObject *entry) const
 For given collection entry return the string that is used to identify the object and, potentially, perform wildcard/regexp filtering on. More...
 
virtual void PrintCollectionEntry (TObject *entry, Option_t *option, Int_t recurse) const
 Print the collection entry. More...
 
virtual void PrintCollectionHeader (Option_t *option) const
 Print the collection header. More...
 
- 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). More...
 
void MakeZombie ()
 

#include <THashList.h>

Inheritance diagram for THashList:
[legend]

Constructor & Destructor Documentation

◆ THashList() [1/3]

THashList::THashList ( const THashList )
private

◆ THashList() [2/3]

THashList::THashList ( Int_t  capacity = TCollection::kInitHashTableCapacity,
Int_t  rehash = 0 
)

Create a THashList object.

Capacity is the initial hashtable capacity (i.e. number of slots), by default kInitHashTableCapacity = 17, and rehash is the value at which a rehash will be triggered. I.e. when the average size of the linked lists at a slot becomes longer than rehash then the hashtable will be resized and refilled to reduce the collision rate to about 1. The higher the collision rate, i.e. the longer the linked lists, the longer lookup will take. If rehash=0 the table will NOT automatically be rehashed. Use Rehash() for manual rehashing.

WARNING !!! If the name of an object in the HashList is modified, The hashlist must be Rehashed

Definition at line 43 of file THashList.cxx.

◆ THashList() [3/3]

THashList::THashList ( TObject parent,
Int_t  capacity = TCollection::kInitHashTableCapacity,
Int_t  rehash = 0 
)

For backward compatibility only. Use other ctor.

Definition at line 51 of file THashList.cxx.

◆ ~THashList()

THashList::~THashList ( )
virtual

Delete a hashlist.

Objects are not deleted unless the THashList is the owner (set via SetOwner()).

Definition at line 60 of file THashList.cxx.

Member Function Documentation

◆ AddAfter() [1/2]

void THashList::AddAfter ( const TObject after,
TObject obj 
)
virtual

Insert object after object after in the list.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfEnumsWithLock, and TSelectorList.

Definition at line 143 of file THashList.cxx.

◆ AddAfter() [2/2]

void THashList::AddAfter ( TObjLink after,
TObject obj 
)
virtual

Insert object after object after in the list.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfEnumsWithLock, and TSelectorList.

Definition at line 154 of file THashList.cxx.

◆ AddAt()

void THashList::AddAt ( TObject obj,
Int_t  idx 
)
virtual

Insert object at location idx in the list.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfEnumsWithLock, and TSelectorList.

Definition at line 165 of file THashList.cxx.

◆ AddBefore() [1/2]

void THashList::AddBefore ( const TObject before,
TObject obj 
)
virtual

Insert object before object before in the list.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfEnumsWithLock, and TSelectorList.

Definition at line 121 of file THashList.cxx.

◆ AddBefore() [2/2]

void THashList::AddBefore ( TObjLink before,
TObject obj 
)
virtual

Insert object before object before in the list.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfEnumsWithLock, and TSelectorList.

Definition at line 132 of file THashList.cxx.

◆ AddFirst() [1/2]

void THashList::AddFirst ( TObject obj)
virtual

Add object at the beginning of the list.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfEnumsWithLock, and TSelectorList.

Definition at line 69 of file THashList.cxx.

◆ AddFirst() [2/2]

void THashList::AddFirst ( TObject obj,
Option_t opt 
)
virtual

Add object at the beginning of the list and also store option.

Storing an option is useful when one wants to change the behaviour of an object a little without having to create a complete new copy of the object. This feature is used, for example, by the Draw() method. It allows the same object to be drawn in different ways.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfEnumsWithLock, and TSelectorList.

Definition at line 84 of file THashList.cxx.

◆ AddLast() [1/2]

void THashList::AddLast ( TObject obj)
virtual

Add object at the end of the list.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfEnumsWithLock, and TSelectorList.

Definition at line 95 of file THashList.cxx.

◆ AddLast() [2/2]

void THashList::AddLast ( TObject obj,
Option_t opt 
)
virtual

Add object at the end of the list and also store option.

Storing an option is useful when one wants to change the behaviour of an object a little without having to create a complete new copy of the object. This feature is used, for example, by the Draw() method. It allows the same object to be drawn in different ways.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfEnumsWithLock, and TSelectorList.

Definition at line 110 of file THashList.cxx.

◆ AverageCollisions()

Float_t THashList::AverageCollisions ( ) const

Return the average collision rate.

The higher the number the longer the linked lists in the hashtable, the slower the lookup. If the number is high, or lookup noticeably too slow, perform a Rehash().

Definition at line 178 of file THashList.cxx.

◆ Clear()

void THashList::Clear ( Option_t option = "")
virtual

Remove all objects from the list.

Does not delete the objects unless the THashList is the owner (set via SetOwner()).

Reimplemented from TList.

Reimplemented in TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfFunctions, and TListOfEnumsWithLock.

Definition at line 189 of file THashList.cxx.

◆ Delete()

void THashList::Delete ( Option_t option = "")
virtual

Remove all objects from the list AND delete all heap based objects.

If option="slow" then keep list consistent during delete. This allows recursive list operations during the delete (e.g. during the dtor of an object in this list one can still access the list to search for other not yet deleted objects).

Reimplemented from TList.

Reimplemented in TListOfEnums, TListOfDataMembers, TListOfFunctionTemplates, TListOfFunctions, and TListOfEnumsWithLock.

Definition at line 207 of file THashList.cxx.

◆ FindObject() [1/2]

TObject * THashList::FindObject ( const char *  name) const
virtual

Find object using its name.

Uses the hash value returned by the TString::Hash() after converting name to a TString.

Reimplemented from TList.

Reimplemented in TListOfDataMembers, TListOfFunctionTemplates, TListOfFunctions, and TListOfEnumsWithLock.

Definition at line 262 of file THashList.cxx.

◆ FindObject() [2/2]

TObject * THashList::FindObject ( const TObject obj) const
virtual

Find object using its hash value (returned by its Hash() member).

Reimplemented from TList.

Reimplemented in TListOfFunctions, and TListOfEnumsWithLock.

Definition at line 272 of file THashList.cxx.

◆ GetListForObject() [1/2]

const TList * THashList::GetListForObject ( const char *  name) const

Return the THashTable's list (bucket) in which obj can be found based on its hash; see THashTable::GetListForObject().

Definition at line 283 of file THashList.cxx.

◆ GetListForObject() [2/2]

const TList * THashList::GetListForObject ( const TObject obj) const

Return the THashTable's list (bucket) in which obj can be found based on its hash; see THashTable::GetListForObject().

Definition at line 294 of file THashList.cxx.

◆ operator=()

THashList& THashList::operator= ( const THashList )
private

◆ RecursiveRemove()

void THashList::RecursiveRemove ( TObject obj)
virtual

Remove object from this collection and recursively remove the object from all other objects (and collections).

This function overrides TCollection::RecursiveRemove that calls the Remove function. THashList::Remove cannot be called because it uses the hash value of the hash table. This hash value is not available anymore when RecursiveRemove is called from the TObject destructor.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfDataMembers, TListOfEnums, TListOfFunctionTemplates, and TListOfEnumsWithLock.

Definition at line 310 of file THashList.cxx.

◆ Rehash()

void THashList::Rehash ( Int_t  newCapacity)

Rehash the hashlist.

If the collision rate becomes too high (i.e. the average size of the linked lists become too long) then lookup efficiency decreases since relatively long lists have to be searched every time. To improve performance rehash the hashtable. This resizes the table to newCapacity slots and refills the table. Use AverageCollisions() to check if you need to rehash.

Definition at line 368 of file THashList.cxx.

◆ Remove() [1/2]

TObject * THashList::Remove ( TObject obj)
virtual

Remove object from the list.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfDataMembers, TListOfEnums, TListOfFunctionTemplates, and TListOfEnumsWithLock.

Definition at line 378 of file THashList.cxx.

◆ Remove() [2/2]

TObject * THashList::Remove ( TObjLink lnk)
virtual

Remove object via its objlink from the list.

Reimplemented from TList.

Reimplemented in TListOfFunctions, TListOfDataMembers, TListOfEnums, TListOfFunctionTemplates, and TListOfEnumsWithLock.

Definition at line 391 of file THashList.cxx.

◆ UseRWLock()

bool THashList::UseRWLock ( )
virtual

Set this collection to use a RW lock upon access, making it thread safe.

Return the previous state.

Note: To test whether the usage is enabled do: collection->TestBit(TCollection::kUseRWLock);

Reimplemented from TCollection.

Definition at line 409 of file THashList.cxx.

Member Data Documentation

◆ fTable

THashTable* THashList::fTable
protected

Definition at line 37 of file THashList.h.


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