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  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  *      File:   mach/vm_behavior.h
  27  *
  28  *      Virtual memory map behavior definitions.
  29  *
  30  */
  31
  32 #ifndef _MACH_VM_BEHAVIOR_H_
  33 #define _MACH_VM_BEHAVIOR_H_
  34
  35 /*
  36  *      Types defined:
  37  *
  38  *      vm_behavior_t   behavior codes.
  39  */
  40
  41 typedef int             vm_behavior_t;
  42
  43 /*
  44  *      Enumeration of valid values for vm_behavior_t.
  45  *      These describe expected page reference behavior for
  46  *      for a given range of virtual memory.  For implementation
  47  *      details see vm/vm_fault.c
  48  */
  49
  50
  51 #define VM_BEHAVIOR_DEFAULT     ((vm_behavior_t) 0)     /* default */
  52 #define VM_BEHAVIOR_RANDOM      ((vm_behavior_t) 1)     /* random */
  53 #define VM_BEHAVIOR_SEQUENTIAL  ((vm_behavior_t) 2)     /* forward sequential */
  54 #define VM_BEHAVIOR_RSEQNTL     ((vm_behavior_t) 3)     /* reverse sequential */
  55 #define VM_BEHAVIOR_WILLNEED    ((vm_behavior_t) 4)     /* will need in near future */
  56 #define VM_BEHAVIOR_DONTNEED    ((vm_behavior_t) 5)     /* dont need in near future */
  57
  58 #endif  /*_MACH_VM_BEHAVIOR_H_*/