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/**
* $Id$
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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; either version 2
* of the License, or (at your option) any later version.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/**
* Copyright (C) 2001 NaN Technologies B.V.
* Guarded memory (de)allocation
*
*
* @mainpage MEM - c-style guarded memory allocation
*
* @section about About the MEM module
*
* MEM provides guarded malloc/calloc calls. All memory is enclosed by
* pads, to detect out-of-bound writes. All blocks are placed in a
* linked list, so they remain reachable at all times. There is no
* back-up in case the linked-list related data is lost.
*
* @section issues Known issues with MEM
*
* There are currently no known issues with MEM. Note that there is a
* second intern/ module with MEM_ prefix, for use in c++.
*
* @section dependencies Dependencies
*
* - stdlib
*
* - stdio
*
* */
#ifndef MEM_MALLOCN_H
#define MEM_MALLOCN_H
#include "stdio.h" /* needed for FILE* */
#include "BLO_sys_types.h" /* needed for uintptr_t */
#ifdef __cplusplus
extern "C" {
#endif
/** Returns the lenght of the allocated memory segment pointed at
* by vmemh. If the pointer was not previously allocated by this
* module, the result is undefined.*/
size_t MEM_allocN_len(void *vmemh);
/**
* Release memory previously allocatred by this module.
*/
short MEM_freeN(void *vmemh);
short WMEM_freeN(void *vmemh);
short _MEM_freeN(void *vmemh, char *file, int line);
#define MEM_freeN(vmemh) _MEM_freeN(vmemh, __FILE__, __LINE__)
/**
* Return zero if memory is not in allocated list
*/
short MEM_testN(void *vmemh);
/**
* Duplicates a block of memory, and returns a pointer to the
* newly allocated block. */
void *MEM_dupallocN(void *vmemh);
/**
* Reallocates a block of memory, and returns pointer to the newly
* allocated block, the old one is freed. this is not as optimized
* as a system realloc but just makes a new allocation and copies
* over from existing memory. */
void *MEM_reallocN(void *vmemh, size_t len);
/**
* Allocate a block of memory of size len, with tag name str. The
* memory is cleared. The name must be static, because only a
* pointer to it is stored ! */
void *MEM_callocN(size_t len, const char * str);
/** Allocate a block of memory of size len, with tag name str. The
* name must be a static, because only a pointer to it is stored !
* */
void *MEM_mallocN(size_t len, const char * str);
/** Same as callocN, clears memory and uses mmap (disk cached) if supported.
Can be free'd with MEM_freeN as usual.
* */
void *MEM_mapallocN(size_t len, const char * str);
/** Print a list of the names and sizes of all allocated memory
* blocks. as a python dict for easy investigation */
void MEM_printmemlist_pydict(void);
/** Print a list of the names and sizes of all allocated memory
* blocks. */
void MEM_printmemlist(void);
/** calls the function on all allocated memory blocks. */
void MEM_callbackmemlist(void (*func)(void*));
/** Print statistics about memory usage */
void MEM_printmemlist_stats(void);
/** Set the callback function for error output. */
void MEM_set_error_callback(void (*func)(const char *));
/**
* Are the start/end block markers still correct ?
*
* @retval 0 for correct memory, 1 for corrupted memory. */
int MEM_check_memory_integrity(void);
/** Set thread locking functions for safe memory allocation from multiple
threads, pass NULL pointers to disable thread locking again. */
void MEM_set_lock_callback(void (*lock)(void), void (*unlock)(void));
/** Attempt to enforce OSX (or other OS's) to have malloc and stack nonzero */
void MEM_set_memory_debug(void);
/* Memory usage stats
* - MEM_get_memory_in_use is all memory
* - MEM_get_mapped_memory_in_use is a subset of all memory */
uintptr_t MEM_get_memory_in_use(void);
uintptr_t MEM_get_mapped_memory_in_use(void);
int MEM_get_memory_blocks_in_use(void);
/********* Internal structs. They're only here for the MEM_OVERHEAD macro.*********/
/*BMESH_TODO/XXX: note to self, don't merge this into trunk*/
/* all memory chunks are put in linked lists */
typedef struct localLink
{
struct localLink *next,*prev;
} localLink;
typedef struct localListBase
{
void *first, *last;
} localListBase;
/* note: keep this struct aligned (e.g., irix/gcc) - Hos */
typedef struct MemHead {
int tag1;
size_t len;
struct MemHead *next,*prev;
const char * name;
const char * nextname;
int tag2;
int mmap; /* if true, memory was mmapped */
#ifdef DEBUG_MEMCOUNTER
int _count;
#endif
} MemHead;
typedef struct MemTail {
int tag3, tag4;
} MemTail;
/*memory bias to hopefully account
for allocation overhead from
the system allocator.*/
#define MEM_OVERHEADBIAS 32
#define MEM_OVERHEAD (sizeof(MemHead) + sizeof(MemTail) + MEM_OVERHEADBIAS)
/*reset the peak memory statistic to zero*/
void MEM_reset_peak_memory(void);
/*get the peak memory usage in bytes, including mmap allocations*/
uintptr_t MEM_get_peak_memory(void);
#ifdef __cplusplus
}
#endif
#endif
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