Blocks for doing IO, used in the transparent compression and encryption code. More...

#include <os0file.h>

Public Member Functions
	Block () noexcept
	Default constructor. More...

Static Public Member Functions
static void	free (file::Block *obj) noexcept
	Free the given memory block. More...

Public Attributes
byte *	m_ptr
	Pointer to the memory block. More...

size_t	m_size
	Size of the data in memory block. More...

byte	pad [ut::INNODB_CACHE_LINE_SIZE]
	This padding is needed to avoid false sharing. More...

std::atomic< bool >	m_in_use

Detailed Description

Blocks for doing IO, used in the transparent compression and encryption code.

Constructor & Destructor Documentation

◆ Block()

file::Block::Block ( )

inlinenoexcept

Default constructor.

Member Function Documentation

◆ free()

void file::Block::free ( file::Block * obj )

inlinestaticnoexcept

Free the given memory block.

Parameters

[in] obj the memory block to be freed.

Member Data Documentation

◆ m_in_use

std::atomic<bool> file::Block::m_in_use

◆ m_ptr

byte* file::Block::m_ptr

Pointer to the memory block.

◆ m_size

size_t file::Block::m_size

Size of the data in memory block.

This may be not UNIV_PAGE_SIZE if the data was compressed before encryption.

◆ pad

byte file::Block::pad[ut::INNODB_CACHE_LINE_SIZE]

This padding is needed to avoid false sharing.

TBD: of what exactly? We can't use alignas because std::vector<Block> uses std::allocator which in C++14 doesn't have to handle overaligned types. (see § 20.7.9.1.5 of N4140 draft)

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

storage/innobase/include/os0file.h

Public Member Functions

Static Public Member Functions

Public Attributes