crypto/openssh-5/monitor_mm.h

   1 /* $OpenBSD: monitor_mm.h,v 1.4 2006/08/03 03:34:42 deraadt 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
  31 struct mm_share {
  32         RB_ENTRY(mm_share) next;
  33         void *address;
  34         size_t size;
  35 };
  36
  37 struct mm_master {
  38         RB_HEAD(mmtree, mm_share) rb_free;
  39         struct mmtree rb_allocated;
  40         void *address;
  41         size_t size;
  42
  43         struct mm_master *mmalloc;      /* Used to completely share */
  44
  45         int write;              /* used to writing to other party */
  46         int read;               /* used for reading from other party */
  47 };
  48
  49 RB_PROTOTYPE(mmtree, mm_share, next, mm_compare)
  50
  51 #define MM_MINSIZE              128
  52
  53 #define MM_ADDRESS_END(x)       (void *)((u_char *)(x)->address + (x)->size)
  54
  55 struct mm_master *mm_create(struct mm_master *, size_t);
  56 void mm_destroy(struct mm_master *);
  57
  58 void mm_share_sync(struct mm_master **, struct mm_master **);
  59
  60 void *mm_malloc(struct mm_master *, size_t);
  61 void *mm_xmalloc(struct mm_master *, size_t);
  62 void mm_free(struct mm_master *, void *);
  63
  64 void mm_memvalid(struct mm_master *, void *, size_t);
  65 #endif /* _MM_H_ */