freebsd-dev/sys/vm/memguard.h
Vladimir Kondratyev 5d4bf0578f LinuxKPI: Implement ksize() function.
In Linux, ksize() gets the actual amount of memory allocated for a given
object. This commit adds malloc_usable_size() to FreeBSD KPI which does
the same. It also maps LinuxKPI ksize() to newly created function.

ksize() function is used by drm-kmod.

Reviewed by:	hselasky, kib
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D26215
2020-08-29 19:26:31 +00:00

63 lines
2.3 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2005,
* Bosko Milekic <bmilekic@FreeBSD.org>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _VM_MEMGUARD_H_
#define _VM_MEMGUARD_H_
#include "opt_vm.h"
struct malloc_type;
struct vm_map;
struct vmem;
#ifdef DEBUG_MEMGUARD
unsigned long memguard_fudge(unsigned long, const struct vm_map *);
void memguard_init(struct vmem *);
void *memguard_alloc(unsigned long, int);
void *memguard_realloc(void *, unsigned long, struct malloc_type *, int);
void memguard_free(void *);
unsigned long memguard_get_req_size(const void *);
int memguard_cmp_mtp(struct malloc_type *, unsigned long);
int memguard_cmp_zone(uma_zone_t);
int is_memguard_addr(void *);
#else
#define memguard_fudge(size, xxx) (size)
#define memguard_init(map) do { } while (0)
#define memguard_alloc(size, flags) NULL
#define memguard_realloc(a, s, mtp, f) NULL
#define memguard_free(addr) do { } while (0)
#define memguard_get_req_size(addr) 0
#define memguard_cmp_mtp(mtp, size) 0
#define memguard_cmp_zone(zone) 0
#define is_memguard_addr(addr) 0
#endif
#endif /* _VM_MEMGUARD_H_ */