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65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
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/*
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* Copyright 2002 Niels Provos <provos@citi.umich.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MM_H_
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#define _MM_H_
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#include <sys/tree.h>
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struct mm_share {
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RB_ENTRY(mm_share) next;
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void *address;
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size_t size;
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};
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struct mm_master {
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RB_HEAD(mmtree, mm_share) rb_free;
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struct mmtree rb_allocated;
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void *address;
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size_t size;
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struct mm_master *mmalloc; /* Used to completely share */
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int write; /* used to writing to other party */
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int read; /* used for reading from other party */
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};
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RB_PROTOTYPE(mmtree, mm_share, next, mm_compare);
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#define MM_MINSIZE 128
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#define MM_ADDRESS_END(x) (void *)((u_char *)(x)->address + (x)->size)
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struct mm_master *mm_create(struct mm_master *, size_t);
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void mm_destroy(struct mm_master *);
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void mm_share_sync(struct mm_master **, struct mm_master **);
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void *mm_malloc(struct mm_master *, size_t);
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void *mm_xmalloc(struct mm_master *, size_t);
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void mm_free(struct mm_master *, void *);
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void mm_memvalid(struct mm_master *, void *, size_t);
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#endif /* _MM_H_ */
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