monitor_mm.h

   1 /* $OpenBSD: monitor_mm.h,v 1.3 2006/03/25 22:22:43 djm Exp $ */
   2
   3 /*
   4  * Copyright 2002 Niels Provos <provos@citi.umich.edu>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef _MM_H_
  29 #define _MM_H_
  30 #include "openbsd-compat/sys-tree.h"
  31
  32 struct mm_share {
  33         RB_ENTRY(mm_share) next;
  34         void *address;
  35         size_t size;
  36 };
  37
  38 struct mm_master {
  39         RB_HEAD(mmtree, mm_share) rb_free;
  40         struct mmtree rb_allocated;
  41         void *address;
  42         size_t size;
  43
  44         struct mm_master *mmalloc;      /* Used to completely share */
  45
  46         int write;              /* used to writing to other party */
  47         int read;               /* used for reading from other party */
  48 };
  49
  50 RB_PROTOTYPE(mmtree, mm_share, next, mm_compare)
  51
  52 #define MM_MINSIZE              128
  53
  54 #define MM_ADDRESS_END(x)       (void *)((u_char *)(x)->address + (x)->size)
  55
  56 struct mm_master *mm_create(struct mm_master *, size_t);
  57 void mm_destroy(struct mm_master *);
  58
  59 void mm_share_sync(struct mm_master **, struct mm_master **);
  60
  61 void *mm_malloc(struct mm_master *, size_t);
  62 void *mm_xmalloc(struct mm_master *, size_t);
  63 void mm_free(struct mm_master *, void *);
  64
  65 void mm_memvalid(struct mm_master *, void *, size_t);
  66 #endif /* _MM_H_ */