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