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/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* 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, 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.
*/
#ifndef _MM_H_
#define _MM_H_
#include <sys/tree.h>
struct mm_share {
RB_ENTRY(mm_share) next;
void *address;
size_t size;
};
struct mm_master {
RB_HEAD(mmtree, mm_share) rb_free;
struct mmtree rb_allocated;
void *address;
size_t size;
struct mm_master *mmalloc; /* Used to completely share */
int write; /* used to writing to other party */
int read; /* used for reading from other party */
};
RB_PROTOTYPE(mmtree, mm_share, next, mm_compare)
#define MM_MINSIZE 128
#define MM_ADDRESS_END(x) (void *)((u_char *)(x)->address + (x)->size)
struct mm_master *mm_create(struct mm_master *, size_t);
void mm_destroy(struct mm_master *);
void mm_share_sync(struct mm_master **, struct mm_master **);
void *mm_malloc(struct mm_master *, size_t);
void *mm_xmalloc(struct mm_master *, size_t);
void mm_free(struct mm_master *, void *);
void mm_memvalid(struct mm_master *, void *, size_t);
#endif /* _MM_H_ */
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