ROOT::Internal::ROnDiskPage Class Reference

A page as being stored on disk, that is packed and compressed.

Used by the cluster pool to cache pages from the physical storage. Such pages generally need to be uncompressed and unpacked before they can be used by RNTuple upper layers.

Definition at line 41 of file RCluster.hxx.

Classes
struct	Key
	On-disk pages within a page source are identified by the column and page number. More...

Public Member Functions
	ROnDiskPage ()=default
	ROnDiskPage (void *address, std::uint32_t size)
const void *	GetAddress () const
std::uint32_t	GetSize () const
bool	IsNull () const

Private Attributes
const void *	fAddress = nullptr
	The memory location of the bytes.
std::uint32_t	fSize = 0
	The compressed and packed size of the page. This includes both payload and checksum (if present)

#include <ROOT/RCluster.hxx>

Constructor & Destructor Documentation

ROnDiskPage() [1/2]

ROOT::Internal::ROnDiskPage::ROnDiskPage ( )

default

ROnDiskPage() [2/2]

ROOT::Internal::ROnDiskPage::ROnDiskPage ( void * address, std::uint32_t size )

inline

Definition at line 61 of file RCluster.hxx.

Member Function Documentation

GetAddress()

const void * ROOT::Internal::ROnDiskPage::GetAddress ( ) const

inline

Definition at line 63 of file RCluster.hxx.

GetSize()

std::uint32_t ROOT::Internal::ROnDiskPage::GetSize ( ) const

inline

Definition at line 64 of file RCluster.hxx.

IsNull()

bool ROOT::Internal::ROnDiskPage::IsNull ( ) const

inline

Definition at line 66 of file RCluster.hxx.

Member Data Documentation

fAddress

const void* ROOT::Internal::ROnDiskPage::fAddress = nullptr

private

The memory location of the bytes.

Definition at line 44 of file RCluster.hxx.

fSize

std::uint32_t ROOT::Internal::ROnDiskPage::fSize = 0

private

The compressed and packed size of the page. This includes both payload and checksum (if present)

Definition at line 46 of file RCluster.hxx.

Libraries for ROOT::Internal::ROnDiskPage:

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

• tree/ntuple/inc/ROOT/RCluster.hxx