mem0pool.cc File Reference

#include "mem0pool.h"
#include "srv0srv.h"
#include "sync0sync.h"
#include "ut0mem.h"
#include "ut0lst.h"
#include "ut0byte.h"
#include "mem0mem.h"
#include "srv0start.h"

Include dependency graph for mem0pool.cc:

Go to the source code of this file.

Classes
struct	mem_pool_t

Macros
#define	MEM_AREA_FREE   1
#define	MEM_AREA_MIN_SIZE   (2 * MEM_AREA_EXTRA_SIZE)

Functions
UNIV_INLINE void	mem_pool_mutex_enter (mem_pool_t *pool)
UNIV_INLINE void	mem_pool_mutex_exit (mem_pool_t *pool)
UNIV_INLINE ulint	mem_area_get_size (mem_area_t *area)
UNIV_INLINE void	mem_area_set_size (mem_area_t *area, ulint size)
UNIV_INLINE ibool	mem_area_get_free (mem_area_t *area)
UNIV_INLINE void	mem_area_set_free (mem_area_t *area, ibool free)
UNIV_INTERN mem_pool_t *	mem_pool_create (ulint size)
UNIV_INTERN void	mem_pool_free (mem_pool_t *pool)
UNIV_INTERN void *	mem_area_alloc (ulint *psize, mem_pool_t *pool)
UNIV_INLINE mem_area_t *	mem_area_get_buddy (mem_area_t *area, ulint size, mem_pool_t *pool)
UNIV_INTERN void	mem_area_free (void *ptr, mem_pool_t *pool)
UNIV_INTERN ibool	mem_pool_validate (mem_pool_t *pool)
UNIV_INTERN void	mem_pool_print_info (FILE *outfile, mem_pool_t *pool)
UNIV_INTERN ulint	mem_pool_get_reserved (mem_pool_t *pool)

Variables
UNIV_INTERN mem_pool_t *	mem_comm_pool = NULL
UNIV_INTERN ulint	mem_n_threads_inside = 0

Detailed Description

The lowest-level memory management

Created 5/12/1997 Heikki Tuuri

Definition in file mem0pool.cc.

Macro Definition Documentation

#define MEM_AREA_FREE   1

Mask used to extract the free bit from area->size

Definition at line 95 of file mem0pool.cc.

#define MEM_AREA_MIN_SIZE   (2 * MEM_AREA_EXTRA_SIZE)

The smallest memory area total size

Definition at line 98 of file mem0pool.cc.

Function Documentation

UNIV_INTERN void* mem_area_alloc	(	ulint *	psize,
		mem_pool_t *	pool
	)

Allocates memory from a pool. NOTE: This low-level function should only be used in mem0mem.*!

Returns

own: allocated memory buffer

Parameters

psize	in: requested size in bytes; for optimum space usage, the size should be a power of 2 minus MEM_AREA_EXTRA_SIZE; out: allocated size in bytes (greater than or equal to the requested size)
pool	in: memory pool

Definition at line 364 of file mem0pool.cc.

Here is the call graph for this function:

Here is the caller graph for this function:

UNIV_INTERN void mem_area_free	(	void *	ptr,
		mem_pool_t *	pool
	)

Frees memory to a pool.

Parameters

ptr	in, own: pointer to allocated memory buffer
pool	in: memory pool

Definition at line 506 of file mem0pool.cc.

Here is the call graph for this function:

Here is the caller graph for this function:

UNIV_INLINE mem_area_t* mem_area_get_buddy	(	mem_area_t *	area,
		ulint	size,
		mem_pool_t *	pool
	)

Gets the buddy of an area, if it exists in pool.

Returns

the buddy, NULL if no buddy in pool

Parameters

area	in: memory area
size	in: memory area size
pool	in: memory pool

Definition at line 467 of file mem0pool.cc.

Here is the caller graph for this function:

UNIV_INLINE ibool mem_area_get_free

(

mem_area_t *

area

)

Returns memory area free bit.

Returns

TRUE if free

Parameters

area

in: area

Definition at line 189 of file mem0pool.cc.

Here is the caller graph for this function:

UNIV_INLINE ulint mem_area_get_size

(

mem_area_t *

area

)

Returns memory area size.

Returns

size

Parameters

area

in: area

Definition at line 164 of file mem0pool.cc.

Here is the caller graph for this function:

UNIV_INLINE void mem_area_set_free	(	mem_area_t *	area,
		ibool	free
	)

Sets memory area free bit.

Parameters

area	in: area
free	in: free bit value

Definition at line 203 of file mem0pool.cc.

Here is the caller graph for this function:

UNIV_INLINE void mem_area_set_size	(	mem_area_t *	area,
		ulint	size
	)

Sets memory area size.

Parameters

area	in: area
size	in: size

Definition at line 175 of file mem0pool.cc.

Here is the caller graph for this function:

UNIV_INTERN mem_pool_t* mem_pool_create

(

ulint

size

)

Creates a memory pool.

Returns

memory pool

Parameters

size	in: pool size in bytes

Definition at line 220 of file mem0pool.cc.

Here is the call graph for this function:

Here is the caller graph for this function:

UNIV_INTERN void mem_pool_free

(

mem_pool_t *

pool

)

Frees a memory pool.

Parameters

pool	in, own: memory pool

Definition at line 279 of file mem0pool.cc.

Here is the call graph for this function:

Here is the caller graph for this function:

UNIV_INTERN ulint mem_pool_get_reserved

(

mem_pool_t *

pool

)

Returns the amount of reserved memory.

Returns

reserved memory in bytes

Parameters

pool	in: memory pool

Definition at line 714 of file mem0pool.cc.

Here is the caller graph for this function:

UNIV_INLINE void mem_pool_mutex_enter

(

mem_pool_t *

pool

)

Reserves the mem pool mutex if we are not in server shutdown. Use this function only in memory free functions, since only memory free functions are used during server shutdown.

Parameters

pool	in: memory pool

Definition at line 135 of file mem0pool.cc.

Here is the caller graph for this function:

UNIV_INLINE void mem_pool_mutex_exit

(

mem_pool_t *

pool

)

Releases the mem pool mutex if we are not in server shutdown. As its corresponding mem_pool_mutex_enter() function, use it only in memory free functions

Parameters

pool	in: memory pool

Definition at line 150 of file mem0pool.cc.

Here is the caller graph for this function:

UNIV_INTERN void mem_pool_print_info	(	FILE *	outfile,
		mem_pool_t *	pool
	)

Prints info of a memory pool.

Parameters

outfile	in: output file to write to
pool	in: memory pool

Definition at line 680 of file mem0pool.cc.

Here is the call graph for this function:

UNIV_INTERN ibool mem_pool_validate

(

mem_pool_t *

pool

)

Validates a memory pool.

Returns

TRUE if ok

Parameters

pool	in: memory pool

Definition at line 636 of file mem0pool.cc.

Here is the call graph for this function:

Here is the caller graph for this function:

Variable Documentation

UNIV_INTERN mem_pool_t* mem_comm_pool = NULL

The common memory pool

Definition at line 116 of file mem0pool.cc.