~drizzle-trunk/drizzle/development

/*****************************************************************************

Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved.

This program is free software; you can redistribute it and/or modify it under

the terms of the GNU General Public License as published by the Free Software

Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT

ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with

this program; if not, write to the Free Software Foundation, Inc., 59 Temple

Place, Suite 330, Boston, MA 02111-1307 USA

*****************************************************************************/

/********************************************************************//**

@file include/mem0dbg.ic

The memory management: the debug code. This is not an independent

compilation module but is included in mem0mem.*.

Created 6/8/1994 Heikki Tuuri

*************************************************************************/

#ifdef UNIV_MEM_DEBUG

# ifndef UNIV_HOTBACKUP

extern mutex_t	mem_hash_mutex;

# endif /* !UNIV_HOTBACKUP */

extern ulint	mem_current_allocated_memory;

/******************************************************************//**

Initializes an allocated memory field in the debug version. */

UNIV_INTERN

void

mem_field_init(

/*===========*/

	byte*	buf,	/*!< in: memory field */

	ulint	n);	/*!< in: how many bytes the user requested */

/******************************************************************//**

Erases an allocated memory field in the debug version. */

UNIV_INTERN

void

mem_field_erase(

/*============*/

	byte*	buf,	/*!< in: memory field */

	ulint	n);	/*!< in: how many bytes the user requested */

/***************************************************************//**

Initializes a buffer to a random combination of hex BA and BE.

Used to initialize allocated memory. */

UNIV_INTERN

void

mem_init_buf(

/*=========*/

	byte*	buf,	/*!< in: pointer to buffer */

	ulint	 n);	 /*!< in: length of buffer */

/***************************************************************//**

Initializes a buffer to a random combination of hex DE and AD.

Used to erase freed memory. */

UNIV_INTERN

void

mem_erase_buf(

/*==========*/

	byte*	buf,	/*!< in: pointer to buffer */

	ulint	n);	/*!< in: length of buffer */

/***************************************************************//**

Inserts a created memory heap to the hash table of

current allocated memory heaps.

Initializes the hash table when first called. */

UNIV_INTERN

void

mem_hash_insert(

/*============*/

	mem_heap_t*	heap,	   /*!< in: the created heap */

	const char*	file_name, /*!< in: file name of creation */

	ulint		line);	   /*!< in: line where created */

/***************************************************************//**

Removes a memory heap (which is going to be freed by the caller)

from the list of live memory heaps. Returns the size of the heap

in terms of how much memory in bytes was allocated for the user of

the heap (not the total space occupied by the heap).

Also validates the heap.

NOTE: This function does not free the storage occupied by the

heap itself, only the node in the list of heaps. */

UNIV_INTERN

void

mem_hash_remove(

/*============*/

	mem_heap_t*	heap,	   /*!< in: the heap to be freed */

	const char*	file_name, /*!< in: file name of freeing */

	ulint		line);	   /*!< in: line where freed */

void

mem_field_header_set_len(byte* field, ulint len);

ulint

mem_field_header_get_len(byte* field);

void

mem_field_header_set_check(byte* field, ulint check);

ulint

mem_field_header_get_check(byte* field);

void

mem_field_trailer_set_check(byte* field, ulint check);

ulint

mem_field_trailer_get_check(byte* field);

#endif /* UNIV_MEM_DEBUG */