RPageStorage::RSealedPage Struct Reference

A sealed page contains the bytes of a page as written to storage (packed & compressed).

It is used as an input to UnsealPages() as well as to transfer pages between different storage media. RSealedPage does not own the buffer it is pointing to in order to not interfere with the memory management of concrete page sink and page source implementations.

Definition at line 89 of file RPageStorage.hxx.

Public Member Functions
	RSealedPage ()=default
	RSealedPage (const RSealedPage &other)=default
	RSealedPage (const void *buffer, std::size_t bufferSize, std::uint32_t nElements, bool hasChecksum=false)
	RSealedPage (RSealedPage &&other)=default
void	ChecksumIfEnabled ()
const void *	GetBuffer () const
std::size_t	GetBufferSize () const
RResult< std::uint64_t >	GetChecksum () const
	Returns a failure if the sealed page has no checksum.
std::size_t	GetDataSize () const
bool	GetHasChecksum () const
std::uint32_t	GetNElements () const
RSealedPage &	operator= (const RSealedPage &other)=default
RSealedPage &	operator= (RSealedPage &&other)=default
void	SetBuffer (const void *buffer)
void	SetBufferSize (std::size_t bufferSize)
void	SetHasChecksum (bool hasChecksum)
void	SetNElements (std::uint32_t nElements)
RResult< void >	VerifyChecksumIfEnabled () const

Private Attributes
const void *	fBuffer = nullptr
std::size_t	fBufferSize = 0
	Size of the page payload and the trailing checksum (if available).
bool	fHasChecksum = false
	If set, the last 8 bytes of the buffer are the xxhash of the rest of the buffer.
std::uint32_t	fNElements = 0

#include <ROOT/RPageStorage.hxx>

Constructor & Destructor Documentation

RSealedPage() [1/4]

ROOT::Internal::RPageStorage::RSealedPage::RSealedPage ( )

default

RSealedPage() [2/4]

ROOT::Internal::RPageStorage::RSealedPage::RSealedPage ( const void * buffer, std::size_t bufferSize, std::uint32_t nElements, bool hasChecksum = false )

inline

Definition at line 98 of file RPageStorage.hxx.

RSealedPage() [3/4]

ROOT::Internal::RPageStorage::RSealedPage::RSealedPage ( const RSealedPage & other )

default

RSealedPage() [4/4]

ROOT::Internal::RPageStorage::RSealedPage::RSealedPage ( RSealedPage && other )

default

Member Function Documentation

ChecksumIfEnabled()

void ROOT::Internal::RPageStorage::RSealedPage::ChecksumIfEnabled

(

)

Definition at line 73 of file RPageStorage.cxx.

GetBuffer()

const void * ROOT::Internal::RPageStorage::RSealedPage::GetBuffer ( ) const

inline

Definition at line 107 of file RPageStorage.hxx.

GetBufferSize()

std::size_t ROOT::Internal::RPageStorage::RSealedPage::GetBufferSize ( ) const

inline

Definition at line 115 of file RPageStorage.hxx.

GetChecksum()

ROOT::RResult< std::uint64_t > ROOT::Internal::RPageStorage::RSealedPage::GetChecksum

(

)

const

Returns a failure if the sealed page has no checksum.

Definition at line 95 of file RPageStorage.cxx.

GetDataSize()

std::size_t ROOT::Internal::RPageStorage::RSealedPage::GetDataSize ( ) const

inline

Definition at line 110 of file RPageStorage.hxx.

GetHasChecksum()

bool ROOT::Internal::RPageStorage::RSealedPage::GetHasChecksum ( ) const

inline

Definition at line 121 of file RPageStorage.hxx.

GetNElements()

std::uint32_t ROOT::Internal::RPageStorage::RSealedPage::GetNElements ( ) const

inline

Definition at line 118 of file RPageStorage.hxx.

operator=() [1/2]

RSealedPage & ROOT::Internal::RPageStorage::RSealedPage::operator= ( const RSealedPage & other )

default

operator=() [2/2]

RSealedPage & ROOT::Internal::RPageStorage::RSealedPage::operator= ( RSealedPage && other )

default

SetBuffer()

void ROOT::Internal::RPageStorage::RSealedPage::SetBuffer ( const void * buffer )

inline

Definition at line 108 of file RPageStorage.hxx.

SetBufferSize()

void ROOT::Internal::RPageStorage::RSealedPage::SetBufferSize ( std::size_t bufferSize )

inline

Definition at line 116 of file RPageStorage.hxx.

SetHasChecksum()

void ROOT::Internal::RPageStorage::RSealedPage::SetHasChecksum ( bool hasChecksum )

inline

Definition at line 122 of file RPageStorage.hxx.

SetNElements()

void ROOT::Internal::RPageStorage::RSealedPage::SetNElements ( std::uint32_t nElements )

inline

Definition at line 119 of file RPageStorage.hxx.

VerifyChecksumIfEnabled()

ROOT::RResult< void > ROOT::Internal::RPageStorage::RSealedPage::VerifyChecksumIfEnabled

(

)

const

Definition at line 84 of file RPageStorage.cxx.

Member Data Documentation

fBuffer

const void* ROOT::Internal::RPageStorage::RSealedPage::fBuffer = nullptr

private

Definition at line 91 of file RPageStorage.hxx.

fBufferSize

std::size_t ROOT::Internal::RPageStorage::RSealedPage::fBufferSize = 0

private

Size of the page payload and the trailing checksum (if available).

Definition at line 92 of file RPageStorage.hxx.

fHasChecksum

bool ROOT::Internal::RPageStorage::RSealedPage::fHasChecksum = false

private

If set, the last 8 bytes of the buffer are the xxhash of the rest of the buffer.

Definition at line 94 of file RPageStorage.hxx.

fNElements

std::uint32_t ROOT::Internal::RPageStorage::RSealedPage::fNElements = 0

private

Definition at line 93 of file RPageStorage.hxx.

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

• tree/ntuple/inc/ROOT/RPageStorage.hxx
• tree/ntuple/src/RPageStorage.cxx