osfmk/mach/vm_behavior.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * @OSF_COPYRIGHT@
  32  */
  33 /*
  34  *      File:   mach/vm_behavior.h
  35  *
  36  *      Virtual memory map behavior definitions.
  37  *
  38  */
  39
  40 #ifndef _MACH_VM_BEHAVIOR_H_
  41 #define _MACH_VM_BEHAVIOR_H_
  42
  43 /*
  44  *      Types defined:
  45  *
  46  *      vm_behavior_t   behavior codes.
  47  */
  48
  49 typedef int             vm_behavior_t;
  50
  51 /*
  52  *      Enumeration of valid values for vm_behavior_t.
  53  *      These describe expected page reference behavior for
  54  *      for a given range of virtual memory.  For implementation
  55  *      details see vm/vm_fault.c
  56  */
  57
  58
  59 #define VM_BEHAVIOR_DEFAULT     ((vm_behavior_t) 0)     /* default */
  60 #define VM_BEHAVIOR_RANDOM      ((vm_behavior_t) 1)     /* random */
  61 #define VM_BEHAVIOR_SEQUENTIAL  ((vm_behavior_t) 2)     /* forward sequential */
  62 #define VM_BEHAVIOR_RSEQNTL     ((vm_behavior_t) 3)     /* reverse sequential */
  63 #define VM_BEHAVIOR_WILLNEED    ((vm_behavior_t) 4)     /* will need in near future */
  64 #define VM_BEHAVIOR_DONTNEED    ((vm_behavior_t) 5)     /* dont need in near future */
  65
  66 #endif  /*_MACH_VM_BEHAVIOR_H_*/