The asynchronous I/O context. More...

Public Member Functions
	Slot ()

std::string	to_json () const noexcept
	Serialize the object into JSON format. More...

std::ostream &	print (std::ostream &out) const noexcept
	Print this object into the given output stream. More...

Public Attributes
uint16_t	pos {0}
	Default constructor/assignment etc. More...

bool	is_reserved {false}
	true if this slot is reserved More...

std::chrono::steady_clock::time_point	reservation_time
	time when reserved More...

byte *	buf {nullptr}
	buffer used in i/o More...

byte *	ptr {nullptr}
	Buffer pointer used for actual IO. More...

IORequest	type {IORequest::UNSET}
	OS_FILE_READ or OS_FILE_WRITE. More...

os_offset_t	offset {0}
	file offset in bytes More...

pfs_os_file_t	file
	file where to read or write More...

const char *	name {nullptr}
	file name or path More...

bool	io_already_done {false}
	used only in simulated aio: true if the physical i/o already made and only the slot message needs to be passed to the caller of os_aio_simulated_handler More...

fil_node_t *	m1 {nullptr}
	The file node for which the IO is requested. More...

void *	m2 {nullptr}
	the requester of an aio operation and which can be used to identify which pending aio operation was completed More...

dberr_t	err {DB_ERROR_UNSET}
	AIO completion status. More...

ulint	len {0}
	length of the block to read or write More...

ulint	n_bytes {0}
	bytes written/read. More...

file::Block *	buf_block {nullptr}
	Buffer block for compressed pages or encrypted pages. More...

bool	skip_punch_hole {false}
	true, if we shouldn't punch a hole after writing the page More...

Detailed Description

The asynchronous I/O context.

Constructor & Destructor Documentation

◆ Slot()

Slot::Slot ( )

inline

Member Function Documentation

◆ print()

std::ostream & Slot::print ( std::ostream & out ) const

noexcept

Print this object into the given output stream.

Returns: the output stream into which object was printed.

◆ to_json()

std::string Slot::to_json ( ) const

noexcept

Serialize the object into JSON format.

Returns: the object in JSON format.

Member Data Documentation

◆ buf

byte* Slot::buf {nullptr}

buffer used in i/o

◆ buf_block

file::Block* Slot::buf_block {nullptr}

Buffer block for compressed pages or encrypted pages.

◆ err

dberr_t Slot::err {DB_ERROR_UNSET}

AIO completion status.

◆ file

pfs_os_file_t Slot::file

Initial value:

file where to read or write

◆ io_already_done

bool Slot::io_already_done {false}

used only in simulated aio: true if the physical i/o already made and only the slot message needs to be passed to the caller of os_aio_simulated_handler

◆ is_reserved

bool Slot::is_reserved {false}

true if this slot is reserved

◆ len

ulint Slot::len {0}

length of the block to read or write

◆ m1

fil_node_t* Slot::m1 {nullptr}

The file node for which the IO is requested.

◆ m2

void* Slot::m2 {nullptr}

the requester of an aio operation and which can be used to identify which pending aio operation was completed

◆ n_bytes

ulint Slot::n_bytes {0}

bytes written/read.

◆ name

const char* Slot::name {nullptr}

file name or path

◆ offset

os_offset_t Slot::offset {0}

file offset in bytes

◆ pos

uint16_t Slot::pos {0}

Default constructor/assignment etc.

are OK index of the slot in the aio array

◆ ptr

byte* Slot::ptr {nullptr}

Buffer pointer used for actual IO.

We advance this when partial IO is required and not buf

◆ reservation_time

std::chrono::steady_clock::time_point Slot::reservation_time

time when reserved

◆ skip_punch_hole

bool Slot::skip_punch_hole {false}

true, if we shouldn't punch a hole after writing the page

◆ type

IORequest Slot::type {IORequest::UNSET}

OS_FILE_READ or OS_FILE_WRITE.

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

storage/innobase/os/os0file.cc

Public Member Functions

Public Attributes