The info structure stored at the beginning of a heap block. More...

#include <mem0mem.h>

Public Member Functions
	UT_LIST_NODE_T (mem_block_t) list
	This contains pointers to next and prev in the list. More...

	UT_LIST_BASE_NODE_T_EXTERN (mem_block_t, list) base
	In the first block of the list this is the base node of the list of blocks; in subsequent blocks this is undefined. More...

Public Attributes
uint64_t	magic_n
	Magic number for debugging. More...

char	file_name [16]
	File name where the mem heap was created. More...

ulint	line
	Line number where the mem heap was created. More...

ulint	len
	Physical length of this block in bytes. More...

ulint	total_size
	Physical length in bytes of all blocks in the heap. More...

ulint	type
	Type of heap: MEM_HEAP_DYNAMIC, or MEM_HEAP_BUF possibly ORed to MEM_HEAP_BTR_SEARCH. More...

ulint	free
	Offset in bytes of the first free position for user data in the block. More...

ulint	start
	The value of the struct field 'free' at the creation of the block. More...

std::atomic< buf_block_t * > *	free_block_ptr

buf_block_t *	buf_block

Detailed Description

The info structure stored at the beginning of a heap block.

Member Function Documentation

◆ UT_LIST_BASE_NODE_T_EXTERN()

mem_block_info_t::UT_LIST_BASE_NODE_T_EXTERN	(	mem_block_t	,
		list
	)

In the first block of the list this is the base node of the list of blocks; in subsequent blocks this is undefined.

◆ UT_LIST_NODE_T()

mem_block_info_t::UT_LIST_NODE_T ( mem_block_t )

This contains pointers to next and prev in the list.

The first block allocated to the heap is also the first block in this list, though it also contains the base node of the list.

Member Data Documentation

◆ buf_block

buf_block_t* mem_block_info_t::buf_block

◆ file_name

char mem_block_info_t::file_name[16]

File name where the mem heap was created.

◆ free

ulint mem_block_info_t::free

Offset in bytes of the first free position for user data in the block.

◆ free_block_ptr

std::atomic<buf_block_t *>* mem_block_info_t::free_block_ptr

◆ len

ulint mem_block_info_t::len

Physical length of this block in bytes.

◆ line

ulint mem_block_info_t::line

Line number where the mem heap was created.

◆ magic_n

uint64_t mem_block_info_t::magic_n

Magic number for debugging.

◆ start

ulint mem_block_info_t::start

The value of the struct field 'free' at the creation of the block.

◆ total_size

ulint mem_block_info_t::total_size

Physical length in bytes of all blocks in the heap.

This is defined only in the base node and is set to ULINT_UNDEFINED in others.

◆ type

ulint mem_block_info_t::type

Type of heap: MEM_HEAP_DYNAMIC, or MEM_HEAP_BUF possibly ORed to MEM_HEAP_BTR_SEARCH.

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

storage/innobase/include/mem0mem.h

Public Member Functions

Public Attributes