osfmk/mach/vm_behavior.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28 /*
  29  *      File:   mach/vm_behavior.h
  30  *
  31  *      Virtual memory map behavior definitions.
  32  *
  33  */
  34
  35 #ifndef _MACH_VM_BEHAVIOR_H_
  36 #define _MACH_VM_BEHAVIOR_H_
  37
  38 /*
  39  *      Types defined:
  40  *
  41  *      vm_behavior_t   behavior codes.
  42  */
  43
  44 typedef int             vm_behavior_t;
  45
  46 /*
  47  *      Enumeration of valid values for vm_behavior_t.
  48  *      These describe expected page reference behavior for
  49  *      for a given range of virtual memory.  For implementation
  50  *      details see vm/vm_fault.c
  51  */
  52
  53
  54 #define VM_BEHAVIOR_DEFAULT     ((vm_behavior_t) 0)     /* default */
  55 #define VM_BEHAVIOR_RANDOM      ((vm_behavior_t) 1)     /* random */
  56 #define VM_BEHAVIOR_SEQUENTIAL  ((vm_behavior_t) 2)     /* forward sequential */
  57 #define VM_BEHAVIOR_RSEQNTL     ((vm_behavior_t) 3)     /* reverse sequential */
  58 #define VM_BEHAVIOR_WILLNEED    ((vm_behavior_t) 4)     /* will need in near future */
  59 #define VM_BEHAVIOR_DONTNEED    ((vm_behavior_t) 5)     /* dont need in near future */
  60
  61 #endif  /*_MACH_VM_BEHAVIOR_H_*/