The asynchronous I/O context. More...

Public Member Functions
bool	is_read () const

void	simulate_incorrect_page_read (dberr_t err)

	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::Type::UNSET}
	IO context used for the IO operation. 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...

std::function< void(dberr_t)>	callback

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...

Detailed Description

The asynchronous I/O context.

Constructor & Destructor Documentation

◆ Slot()

Slot::Slot ( )

inline

Member Function Documentation

◆ is_read()

bool Slot::is_read ( ) const

inline

◆ 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.

◆ simulate_incorrect_page_read()

void Slot::simulate_incorrect_page_read ( dberr_t err )

◆ 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

◆ callback

std::function<void(dberr_t)> Slot::callback

◆ err

dberr_t Slot::err {DB_ERROR_UNSET}

AIO completion status.

◆ file

pfs_os_file_t Slot::file

Initial value:

{
 
      IF_WIN(nullptr, 0)  
  }

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

◆ 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

◆ type

IORequest Slot::type {IORequest::Type::UNSET}

IO context used for the IO operation.

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

storage/innobase/os/os0file.cc

Public Member Functions

Public Attributes