| 1 | /*␊ |
| 2 | * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_OSREFERENCE_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. The rights granted to you under the License␊ |
| 10 | * may not be used to create, or enable the creation or redistribution of,␊ |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to␊ |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any␊ |
| 13 | * terms of an Apple operating system software license agreement.␊ |
| 14 | * ␊ |
| 15 | * Please obtain a copy of the License at␊ |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file.␊ |
| 17 | * ␊ |
| 18 | * The Original Code and all software distributed under the License are␊ |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
| 23 | * Please see the License for the specific language governing rights and␊ |
| 24 | * limitations under the License.␊ |
| 25 | * ␊ |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊ |
| 27 | */␊ |
| 28 | /*␊ |
| 29 | * @OSF_COPYRIGHT@␊ |
| 30 | */␊ |
| 31 | /*␊ |
| 32 | *␉File:␉mach/vm_behavior.h␊ |
| 33 | *␊ |
| 34 | *␉Virtual memory map behavior definitions.␊ |
| 35 | *␊ |
| 36 | */␊ |
| 37 | ␊ |
| 38 | #ifndef␉_MACH_VM_BEHAVIOR_H_␊ |
| 39 | #define _MACH_VM_BEHAVIOR_H_␊ |
| 40 | ␊ |
| 41 | /*␊ |
| 42 | *␉Types defined:␊ |
| 43 | *␊ |
| 44 | *␉vm_behavior_t␉behavior codes.␊ |
| 45 | */␊ |
| 46 | ␊ |
| 47 | typedef int␉␉vm_behavior_t;␊ |
| 48 | ␊ |
| 49 | /*␊ |
| 50 | *␉Enumeration of valid values for vm_behavior_t.␊ |
| 51 | *␉These describe expected page reference behavior for ␊ |
| 52 | *␉for a given range of virtual memory. For implementation ␊ |
| 53 | *␉details see vm/vm_fault.c␊ |
| 54 | */␊ |
| 55 | ␊ |
| 56 | ␊ |
| 57 | /*␊ |
| 58 | * The following behaviors affect the memory region's future behavior␊ |
| 59 | * and are stored in the VM map entry data structure.␊ |
| 60 | */␊ |
| 61 | #define VM_BEHAVIOR_DEFAULT␉((vm_behavior_t) 0)␉/* default */␊ |
| 62 | #define VM_BEHAVIOR_RANDOM␉((vm_behavior_t) 1)␉/* random */␊ |
| 63 | #define VM_BEHAVIOR_SEQUENTIAL␉((vm_behavior_t) 2)␉/* forward sequential */␊ |
| 64 | #define VM_BEHAVIOR_RSEQNTL␉((vm_behavior_t) 3)␉/* reverse sequential */␊ |
| 65 | ␊ |
| 66 | /*␊ |
| 67 | * The following "behaviors" affect the memory region only at the time of the␊ |
| 68 | * call and are not stored in the VM map entry.␊ |
| 69 | */␊ |
| 70 | #define VM_BEHAVIOR_WILLNEED␉((vm_behavior_t) 4)␉/* will need in near future */␊ |
| 71 | #define VM_BEHAVIOR_DONTNEED␉((vm_behavior_t) 5)␉/* dont need in near future */␊ |
| 72 | #define VM_BEHAVIOR_FREE␉((vm_behavior_t) 6)␉/* free memory without write-back */␊ |
| 73 | #define VM_BEHAVIOR_ZERO_WIRED_PAGES␉((vm_behavior_t) 7)␉/* zero out the wired pages of an entry if it is being deleted without unwiring them first */␊ |
| 74 | #define VM_BEHAVIOR_REUSABLE␉((vm_behavior_t) 8)␊ |
| 75 | #define VM_BEHAVIOR_REUSE␉((vm_behavior_t) 9)␊ |
| 76 | #define VM_BEHAVIOR_CAN_REUSE␉((vm_behavior_t) 10)␊ |
| 77 | ␊ |
| 78 | #endif␉/*_MACH_VM_BEHAVIOR_H_*/␊ |
| 79 | |
