class TFree: public TObject


 Service class for TFile.
 Each file has a linked list of free segments. Each free segment
 is described by its firts and last address.
 When an object is written to a file via TObject::Write, a new Key (see TKey)
 is created. The first free segment big enough to accomodate the object
 is used.
 If the object size has a length corresponding to the size of the free segment,
 the free segment is deleted from the list of free segments.
 When an object is deleted from a file, a new TFree object is generated.
 If the deleted object is contiguous to an already deleted object, the free
 segments are merged in one single segment.

Function Members (Methods)

public:

	TFree()
	TFree(const TFree&)
	TFree(TList* lfree, Long64_t first, Long64_t last)
virtual	~TFree()
void	TObject::AbstractMethod(const char* method) const
TFree*	AddFree(TList* lfree, Long64_t first, Long64_t last)
virtual void	TObject::AppendPad(Option_t* option = "")
virtual void	TObject::Browse(TBrowser* b)
static TClass*	Class()
virtual const char*	TObject::ClassName() const
virtual void	TObject::Clear(Option_t* = "")
virtual TObject*	TObject::Clone(const char* newname = "") const
virtual Int_t	TObject::Compare(const TObject* obj) const
virtual void	TObject::Copy(TObject& object) const
virtual void	TObject::Delete(Option_t* option = "")MENU
virtual Int_t	TObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual void	TObject::Draw(Option_t* option = "")
virtual void	TObject::DrawClass() constMENU
virtual TObject*	TObject::DrawClone(Option_t* option = "") constMENU
virtual void	TObject::Dump() constMENU
virtual void	TObject::Error(const char* method, const char* msgfmt) const
virtual void	TObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual void	TObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual void	TObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual void	TObject::Fatal(const char* method, const char* msgfmt) const
virtual void	FillBuffer(char*& buffer)
virtual TObject*	TObject::FindObject(const char* name) const
virtual TObject*	TObject::FindObject(const TObject* obj) const
TFree*	GetBestFree(TList* lfree, Int_t nbytes)
virtual Option_t*	TObject::GetDrawOption() const
static Long_t	TObject::GetDtorOnly()
Long64_t	GetFirst() const
virtual const char*	TObject::GetIconName() const
Long64_t	GetLast() const
virtual const char*	TObject::GetName() const
virtual char*	TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_t	TObject::GetObjectStat()
virtual Option_t*	TObject::GetOption() const
virtual const char*	TObject::GetTitle() const
virtual UInt_t	TObject::GetUniqueID() const
virtual Bool_t	TObject::HandleTimer(TTimer* timer)
virtual ULong_t	TObject::Hash() const
virtual void	TObject::Info(const char* method, const char* msgfmt) const
virtual Bool_t	TObject::InheritsFrom(const char* classname) const
virtual Bool_t	TObject::InheritsFrom(const TClass* cl) const
virtual void	TObject::Inspect() constMENU
void	TObject::InvertBit(UInt_t f)
virtual TClass*	IsA() const
virtual Bool_t	TObject::IsEqual(const TObject* obj) const
virtual Bool_t	TObject::IsFolder() const
Bool_t	TObject::IsOnHeap() const
virtual Bool_t	TObject::IsSortable() const
Bool_t	TObject::IsZombie() const
virtual void	ls(Option_t*) const
void	TObject::MayNotUse(const char* method) const
virtual Bool_t	TObject::Notify()
void	TObject::Obsolete(const char* method, const char* asOfVers, const char* removedFromVers) const
static void	TObject::operator delete(void* ptr)
static void	TObject::operator delete(void* ptr, void* vp)
static void	TObject::operator delete[](void* ptr)
static void	TObject::operator delete[](void* ptr, void* vp)
void*	TObject::operator new(size_t sz)
void*	TObject::operator new(size_t sz, void* vp)
void*	TObject::operator new[](size_t sz)
void*	TObject::operator new[](size_t sz, void* vp)
TFree&	operator=(const TFree&)
virtual void	TObject::Paint(Option_t* option = "")
virtual void	TObject::Pop()
virtual void	TObject::Print(Option_t* option = "") const
virtual Int_t	TObject::Read(const char* name)
virtual void	ReadBuffer(char*& buffer)
virtual void	TObject::RecursiveRemove(TObject* obj)
void	TObject::ResetBit(UInt_t f)
virtual void	TObject::SaveAs(const char* filename = "", Option_t* option = "") constMENU
virtual void	TObject::SavePrimitive(ostream& out, Option_t* option = "")
void	TObject::SetBit(UInt_t f)
void	TObject::SetBit(UInt_t f, Bool_t set)
virtual void	TObject::SetDrawOption(Option_t* option = "")MENU
static void	TObject::SetDtorOnly(void* obj)
void	SetFirst(Long64_t first)
void	SetLast(Long64_t last)
static void	TObject::SetObjectStat(Bool_t stat)
virtual void	TObject::SetUniqueID(UInt_t uid)
virtual void	ShowMembers(TMemberInspector&)
Int_t	Sizeof() const
virtual void	Streamer(TBuffer&)
void	StreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)
virtual void	TObject::SysError(const char* method, const char* msgfmt) const
Bool_t	TObject::TestBit(UInt_t f) const
Int_t	TObject::TestBits(UInt_t f) const
virtual void	TObject::UseCurrentStyle()
virtual void	TObject::Warning(const char* method, const char* msgfmt) const
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const

protected:

virtual void	TObject::DoError(int level, const char* location, const char* fmt, va_list va) const
void	TObject::MakeZombie()

Data Members

public:

enum TObject::EStatusBits {	kCanDelete
	kMustCleanup
	kObjInCanvas
	kIsReferenced
	kHasUUID
	kCannotPick
	kNoContextMenu
	kInvalidObject
};
enum TObject::[unnamed] {	kIsOnHeap
	kNotDeleted
	kZombie
	kBitMask
	kSingleKey
	kOverwrite
	kWriteDelete
};

protected:

Long64_t	fFirst	First free word of segment
Long64_t	fLast	Last free word of segment

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

TFree()

 TFree default constructor.

TFree(TList* lfree, Long64_t first, Long64_t last)

 Constructor for a FREE segment.

TFree * AddFree(TList* lfree, Long64_t first, Long64_t last)

 Add a new free segment to the list of free segments.

  If last just precedes an existing free segment, then first becomes
     the new starting location of the free segment.
  if first just follows an existing free segment, then last becomes
     the new ending location of the free segment.
  if first just follows an existing free segment AND last just precedes
     an existing free segment, these two segments are merged into
     one single segment.

~TFree()

 TFree Destructor.

void FillBuffer(char*& buffer)

 Encode FREE structure into output buffer.

TFree * GetBestFree(TList* lfree, Int_t nbytes)

 Return the best free segment where to store nbytes.

void ls(Option_t* ) const

 List free segment contents.

void ReadBuffer(char*& buffer)

 Decode one FREE structure from input buffer

Int_t Sizeof() const

 return number of bytes occupied by this TFree on permanent storage

TFree()

Long64_t GetFirst() const

{return fFirst;}

Long64_t GetLast() const

{return fLast;}

void SetFirst(Long64_t first)

{fFirst=first;}

void SetLast(Long64_t last)

{fLast=last;}