#include "mem0dbg.ic"
#include "mem0pool.h"

Include dependency graph for mem0mem.ic:

This graph shows which files directly or indirectly include this file:

Macros
#define	mem_heap_create_block(heap, n, type, file_name, line) mem_heap_create_block_func(heap, n, file_name, line, type)
#define	mem_heap_create_at(N, file_name, line) mem_heap_create_func(N, file_name, line, MEM_HEAP_DYNAMIC)

Functions
UNIV_INTERN mem_block_t *	mem_heap_create_block_func (mem_heap_t heap, ulint n, const char file_name, ulint line, ulint type)
UNIV_INTERN void	mem_heap_block_free (mem_heap_t heap, mem_block_t block)
UNIV_INTERN void	mem_heap_free_block_free (mem_heap_t *heap)
UNIV_INTERN mem_block_t *	mem_heap_add_block (mem_heap_t *heap, ulint n)
UNIV_INLINE void	mem_block_set_len (mem_block_t *block, ulint len)
UNIV_INLINE ulint	mem_block_get_len (mem_block_t *block)
UNIV_INLINE void	mem_block_set_type (mem_block_t *block, ulint type)
UNIV_INLINE ulint	mem_block_get_type (mem_block_t *block)
UNIV_INLINE void	mem_block_set_free (mem_block_t *block, ulint free)
UNIV_INLINE ulint	mem_block_get_free (mem_block_t *block)
UNIV_INLINE void	mem_block_set_start (mem_block_t *block, ulint start)
UNIV_INLINE ulint	mem_block_get_start (mem_block_t *block)
UNIV_INLINE void *	mem_heap_zalloc (mem_heap_t *heap, ulint n)
UNIV_INLINE void *	mem_heap_alloc (mem_heap_t *heap, ulint n)
UNIV_INLINE byte *	mem_heap_get_heap_top (mem_heap_t *heap)
UNIV_INLINE void	mem_heap_free_heap_top (mem_heap_t heap, byte old_top)
UNIV_INLINE void	mem_heap_empty (mem_heap_t *heap)
UNIV_INLINE void *	mem_heap_get_top (mem_heap_t *heap, ulint n)
UNIV_INLINE void	mem_heap_free_top (mem_heap_t *heap, ulint n)
UNIV_INLINE mem_heap_t *	mem_heap_create_func (ulint n, const char *file_name, ulint line, ulint type)
UNIV_INLINE void	mem_heap_free_func (mem_heap_t heap, const char file_name)
	ut_ad (mem_heap_check(heap))
	if (heap->free_block)
	while (block!=NULL)
UNIV_INLINE void *	mem_alloc_func (ulint n, const char file_name, ulint line, ulint size)
UNIV_INLINE void	mem_free_func (void ptr, const char file_name, ulint line)
UNIV_INLINE ulint	mem_heap_get_size (mem_heap_t *heap)
UNIV_INLINE char *	mem_strdup (const char *str)
UNIV_INLINE char *	mem_strdupl (const char *str, ulint len)
UNIV_INLINE char *	mem_heap_strdupl (mem_heap_t heap, const char str, ulint len)

Variables
UNIV_INLINE void ulint line mem_block_t *	block = UT_LIST_GET_LAST(heap->base)
mem_block_t *	prev_block

Detailed Description

The memory management

Created 6/8/1994 Heikki Tuuri

Function Documentation

UNIV_INLINE void* mem_alloc_func	(	ulint	n,
		const char *	file_name,
		ulint	line,
		ulint *	size
	)

NOTE: Use the corresponding macro instead of this function. Allocates a single buffer of memory from the dynamic memory of the C compiler. Is like malloc of C. The buffer must be freed with mem_free.

Returns: own: free storage

Parameters

n	in: desired number of bytes
file_name	in: file name where created
line	in: line where created
size	out: allocated size in bytes, or NULL

UNIV_INLINE void mem_free_func	(	void *	ptr,
		const char *	file_name,
		ulint	line
	)

NOTE: Use the corresponding macro instead of this function. Frees a single buffer of storage from the dynamic memory of the C compiler. Similar to the free of C.

Parameters

ptr	in, own: buffer to be freed
file_name	in: file name where created
line	in: line where created

UNIV_INTERN mem_block_t* mem_heap_add_block	(	mem_heap_t *	heap,
		ulint	n
	)

Adds a new block to a memory heap.

Returns: created block, NULL if did not succeed (only possible for MEM_HEAP_BTR_SEARCH type heaps) in: number of bytes user needs

Parameters

heap	in: memory heap

UNIV_INLINE void* mem_heap_alloc	(	mem_heap_t *	heap,
		ulint	n
	)

Allocates n bytes of memory from a memory heap.

Returns: allocated storage, NULL if did not succeed (only possible for MEM_HEAP_BTR_SEARCH type heaps)

Parameters

heap	in: memory heap
n	in: number of bytes; if the heap is allowed to grow into the buffer pool, this must be <= MEM_MAX_ALLOC_IN_BUF

UNIV_INTERN void mem_heap_block_free	(	mem_heap_t *	heap,
		mem_block_t *	block
	)

Frees a block from a memory heap. in: block to free

Parameters

heap in: heap

UNIV_INTERN mem_block_t* mem_heap_create_block_func	(	mem_heap_t *	heap,
		ulint	n,
		const char *	file_name,
		ulint	line,
		ulint	type
	)

Creates a memory heap block where data can be allocated.

Returns: own: memory heap block, NULL if did not succeed (only possible for MEM_HEAP_BTR_SEARCH type heaps) in: type of heap: MEM_HEAP_DYNAMIC or MEM_HEAP_BUFFER

Parameters

heap	in: memory heap or NULL if first block should be created
n	in: number of bytes needed for user data
file_name	in: file name where created
line	in: line where created

UNIV_INLINE mem_heap_t* mem_heap_create_func	(	ulint	n,
		const char *	file_name,
		ulint	line,
		ulint	type
	)

NOTE: Use the corresponding macros instead of this function. Creates a memory heap. For debugging purposes, takes also the file name and line as argument.

Returns: own: memory heap, NULL if did not succeed (only possible for MEM_HEAP_BTR_SEARCH type heaps)

Parameters

n	in: desired start block size, this means that a single user buffer of size n will fit in the block, 0 creates a default size block
file_name	in: file name where created
line	in: line where created
type	in: heap type

UNIV_INLINE void mem_heap_empty ( mem_heap_t * heap )

Empties a memory heap. The first memory block of the heap is not freed.

Parameters

heap	in: heap to empty

UNIV_INTERN void mem_heap_free_block_free ( mem_heap_t * heap )

Frees the free_block field from a memory heap. in: heap

UNIV_INLINE void mem_heap_free_func	(	mem_heap_t *	heap,
		const char *	file_name
	)

NOTE: Use the corresponding macro instead of this function. Frees the space occupied by a memory heap. In the debug version erases the heap memory blocks.

Parameters

heap	in, own: heap to be freed

UNIV_INLINE void mem_heap_free_heap_top	(	mem_heap_t *	heap,
		byte *	old_top
	)

Frees the space in a memory heap exceeding the pointer given. The pointer must have been acquired from mem_heap_get_heap_top. The first memory block of the heap is not freed.

Parameters

heap	in: heap from which to free
old_top	in: pointer to old top of heap

UNIV_INLINE void mem_heap_free_top	(	mem_heap_t *	heap,
		ulint	n
	)

Frees the topmost element in a memory heap. The size of the element must be given.

Parameters

heap	in: memory heap
n	in: size of the topmost element

UNIV_INLINE byte* mem_heap_get_heap_top ( mem_heap_t * heap )

Returns a pointer to the heap top.

Returns: pointer to the heap top

Parameters

heap	in: memory heap

UNIV_INLINE ulint mem_heap_get_size ( mem_heap_t * heap )

Returns the space in bytes occupied by a memory heap.

Parameters

heap in: heap

UNIV_INLINE void* mem_heap_get_top	(	mem_heap_t *	heap,
		ulint	n
	)

Returns a pointer to the topmost element in a memory heap. The size of the element must be given.

Returns: pointer to the topmost element

Parameters

heap	in: memory heap
n	in: size of the topmost element

UNIV_INLINE char* mem_heap_strdupl	(	mem_heap_t *	heap,
		const char *	str,
		ulint	len
	)

Makes a NUL-terminated copy of a nonterminated string, allocated from a memory heap.

Returns: own: a copy of the string

Parameters

heap	in: memory heap where string is allocated
str	in: string to be copied
len	in: length of str, in bytes

UNIV_INLINE void* mem_heap_zalloc	(	mem_heap_t *	heap,
		ulint	n
	)

Allocates and zero-fills n bytes of memory from a memory heap.

Returns: allocated, zero-filled storage

Parameters

heap	in: memory heap
n	in: number of bytes; if the heap is allowed to grow into the buffer pool, this must be <= MEM_MAX_ALLOC_IN_BUF

UNIV_INLINE char* mem_strdup ( const char * str )

Duplicates a NUL-terminated string.

Returns: own: a copy of the string, must be deallocated with mem_free

Parameters

str	in: string to be copied

UNIV_INLINE char* mem_strdupl	(	const char *	str,
		ulint	len
	)

Makes a NUL-terminated copy of a nonterminated string.

Returns: own: a copy of the string, must be deallocated with mem_free

Parameters

str	in: string to be copied
len	in: length of str, in bytes

Variable Documentation

block = UT_LIST_GET_LAST(heap->base)

< in: file name where freed

Macros

Functions

Variables

Detailed Description

Function Documentation

Variable Documentation