This class represents the encapsulation of a block request.

It contains the chunks to be prefetched and also serves as a container for the information read. These blocks are prefetch in a special reader thread by the TFilePrefetch class.

Definition at line 22 of file TFPBlock.h.

Public Member Functions
	TFPBlock (Long64_t , Int_t , Int_t)
	Constructor.

virtual	~TFPBlock ()
	Destructor.

char *	GetBuffer () const
	Get block buffer.

Long64_t	GetCapacity () const
	Return capacity of the block.

Long64_t	GetDataSize () const
	Return size of the data in the block.

Int_t *	GetLen () const
	Get pointer to the array of lengths.

Int_t	GetLen (Int_t) const
	Get length of the element at index i.

Int_t	GetNoElem () const
	Return number of elements in the block.

Long64_t *	GetPos () const
	Get pointer to the array of postions.

Long64_t	GetPos (Int_t) const
	Get position of the element at index i.

char *	GetPtrToPiece (Int_t index) const
	Get block buffer.

void	ReallocBlock (Long64_t , Int_t , Int_t)
	Reallocate the block's buffer based on the length of the elements it will contain.

void	SetBuffer (char *)
	Set block buffer.

void	SetPos (Int_t, Long64_t)
	Set pos value for index idx.

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 for instance with: `gROOT->SetSelectedPad(gPad)`.

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=0)
	Execute method on this object with the given parameter string, e.g.

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	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)

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 void	Print (Option_t *option="") const
	This method must be overridden when a class wants to print itself.

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.

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=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.

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

Private Member Functions
	TFPBlock (const TFPBlock &)=delete

TFPBlock &	operator= (const TFPBlock &)=delete

Private Attributes
char *	fBuffer
	Content of the block.

Long64_t	fCapacity
	Capacity of the buffer.

Long64_t	fDataSize
	Total size of useful data in the block.

Int_t *	fLen
	Array of lengths of each segment.

Int_t	fNblock
	Number of segment in the block.

Long64_t *	fPos
	Array of positions of each segment.

Long64_t *	fRelOffset
	Relative offset of piece in the buffer.

Additional Inherited Members
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 TObject
static Long_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.

Protected Types inherited from TObject
enum	{ kOnlyPrepStep = BIT(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 <TFPBlock.h>

Inheritance diagram for TFPBlock:

[legend]

Constructor & Destructor Documentation

◆ TFPBlock() [1/2]

TFPBlock::TFPBlock ( const TFPBlock & )

privatedelete

◆ TFPBlock() [2/2]

TFPBlock::TFPBlock	(	Long64_t *	offset,
		Int_t *	length,
		Int_t	nb
	)

Constructor.

Definition at line 36 of file TFPBlock.cxx.

◆ ~TFPBlock()

TFPBlock::~TFPBlock ( )

virtual

Destructor.

Definition at line 60 of file TFPBlock.cxx.

Member Function Documentation

◆ GetBuffer()

char * TFPBlock::GetBuffer ( ) const

inline

Get block buffer.

Definition at line 103 of file TFPBlock.h.

◆ GetCapacity()

Long64_t TFPBlock::GetCapacity ( ) const

inline

Return capacity of the block.

Definition at line 79 of file TFPBlock.h.

◆ GetDataSize()

Long64_t TFPBlock::GetDataSize ( ) const

inline

Return size of the data in the block.

Definition at line 73 of file TFPBlock.h.

◆ GetLen() [1/2]

Int_t * TFPBlock::GetLen ( ) const

inline

Get pointer to the array of lengths.

Definition at line 66 of file TFPBlock.h.

◆ GetLen() [2/2]

Int_t TFPBlock::GetLen ( Int_t i ) const

inline

Get length of the element at index i.

Definition at line 97 of file TFPBlock.h.

◆ GetNoElem()

Int_t TFPBlock::GetNoElem ( ) const

inline

Return number of elements in the block.

Definition at line 85 of file TFPBlock.h.

◆ GetPos() [1/2]

Long64_t * TFPBlock::GetPos ( ) const

inline

Get pointer to the array of postions.

Definition at line 60 of file TFPBlock.h.

◆ GetPos() [2/2]

Long64_t TFPBlock::GetPos ( Int_t i ) const

inline

Get position of the element at index i.

Definition at line 91 of file TFPBlock.h.

◆ GetPtrToPiece()

char * TFPBlock::GetPtrToPiece ( Int_t index ) const

inline

Get block buffer.

Definition at line 109 of file TFPBlock.h.

◆ operator=()

TFPBlock & TFPBlock::operator= ( const TFPBlock & )

privatedelete

◆ ReallocBlock()

void TFPBlock::ReallocBlock	(	Long64_t *	offset,
		Int_t *	length,
		Int_t	nb
	)

Reallocate the block's buffer based on the length of the elements it will contain.

Definition at line 94 of file TFPBlock.cxx.

◆ SetBuffer()

void TFPBlock::SetBuffer ( char * buf )

Set block buffer.

Definition at line 81 of file TFPBlock.cxx.

◆ SetPos()

void TFPBlock::SetPos	(	Int_t	idx,
		Long64_t	value
	)

Set pos value for index idx.

Definition at line 72 of file TFPBlock.cxx.

Member Data Documentation

◆ fBuffer

char* TFPBlock::fBuffer

private

Content of the block.

Definition at line 25 of file TFPBlock.h.

◆ fCapacity

Long64_t TFPBlock::fCapacity

private

Capacity of the buffer.

Definition at line 28 of file TFPBlock.h.

◆ fDataSize

Long64_t TFPBlock::fDataSize

private

Total size of useful data in the block.

Definition at line 27 of file TFPBlock.h.

◆ fLen

Int_t* TFPBlock::fLen

private

Array of lengths of each segment.

Definition at line 29 of file TFPBlock.h.

◆ fNblock

Int_t TFPBlock::fNblock

private

Number of segment in the block.

Definition at line 26 of file TFPBlock.h.

◆ fPos

Long64_t* TFPBlock::fPos

private

Array of positions of each segment.

Definition at line 30 of file TFPBlock.h.

◆ fRelOffset

Long64_t* TFPBlock::fRelOffset

private

Relative offset of piece in the buffer.

Definition at line 31 of file TFPBlock.h.

Libraries for TFPBlock:

[legend]

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

io/io/inc/TFPBlock.h
io/io/src/TFPBlock.cxx

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ TFPBlock() [1/2]

◆ TFPBlock() [2/2]

◆ ~TFPBlock()

Member Function Documentation

◆ GetBuffer()

◆ GetCapacity()

◆ GetDataSize()

◆ GetLen() [1/2]

◆ GetLen() [2/2]

◆ GetNoElem()

◆ GetPos() [1/2]

◆ GetPos() [2/2]

◆ GetPtrToPiece()

◆ operator=()

◆ ReallocBlock()

◆ SetBuffer()

◆ SetPos()

Member Data Documentation

◆ fBuffer

◆ fCapacity

◆ fDataSize

◆ fLen

◆ fNblock

◆ fPos

◆ fRelOffset