FreeBSD/Linux Kernel Cross Reference
sys/vm/memguard.h

     /*-
      * 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_ */

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