mem0mem.cc File Reference

#include "mem0mem.h"
#include "buf0buf.h"
#include "srv0srv.h"
#include "mem0dbg.cc"
#include <stdarg.h>

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Functions
UNIV_INTERN char *	mem_heap_strdup (mem_heap_t *heap, const char *str)
UNIV_INTERN void *	mem_heap_dup (mem_heap_t *heap, const void *data, ulint len)
UNIV_INTERN char *	mem_heap_strcat (mem_heap_t *heap, const char *s1, const char *s2)
UNIV_INTERN char *	mem_heap_printf (mem_heap_t *heap, const char *format,...)
UNIV_INTERN mem_block_t *	mem_heap_create_block (mem_heap_t *heap, ulint n, ulint type, const char *file_name, ulint line)
UNIV_INTERN mem_block_t *	mem_heap_add_block (mem_heap_t *heap, ulint n)
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)

Detailed Description

The memory management

Created 6/9/1994 Heikki Tuuri

Definition in file mem0mem.cc.

Function Documentation

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)

Parameters

heap	in: memory heap
n	in: number of bytes user needs

Definition at line 416 of file mem0mem.cc.

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

Frees a block from a memory heap.

Parameters

heap	in: heap
block	in: block to free

Definition at line 469 of file mem0mem.cc.

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

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)

Parameters

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

Definition at line 302 of file mem0mem.cc.

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UNIV_INTERN void* mem_heap_dup	(	mem_heap_t *	heap,
		const void *	data,
		ulint	len
	)

Duplicate a block of data, allocated from a memory heap.

Returns

own: a copy of the data

Parameters

heap	in: memory heap where copy is allocated
data	in: data to be copied
len	in: length of data, in bytes

Definition at line 119 of file mem0mem.cc.

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UNIV_INTERN void mem_heap_free_block_free

(

mem_heap_t *

heap

)

Frees the free_block field from a memory heap.

Parameters

heap

in: heap

Definition at line 542 of file mem0mem.cc.

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UNIV_INTERN char* mem_heap_printf	(	mem_heap_t *	heap,
		const char *	format,
			...
	)

A simple sprintf replacement that dynamically allocates the space for the formatted string from the given heap. This supports a very limited set of the printf syntax: types 's' and 'u' and length modifier 'l' (which is required for the 'u' type).

Returns

heap-allocated formatted string

Parameters

heap	in: memory heap
format	in: format string

Definition at line 271 of file mem0mem.cc.

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UNIV_INTERN char* mem_heap_strcat	(	mem_heap_t *	heap,
		const char *	s1,
		const char *	s2
	)

Concatenate two strings and return the result, using a memory heap.

Returns

own: the result

Parameters

heap	in: memory heap where string is allocated
s1	in: string 1
s2	in: string 2

Definition at line 133 of file mem0mem.cc.

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UNIV_INTERN char* mem_heap_strdup	(	mem_heap_t *	heap,
		const char *	str
	)

Duplicates a NUL-terminated 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

Definition at line 106 of file mem0mem.cc.

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