/*
* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
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/*
* @OSF_COPYRIGHT@
*/
/*
* File: mach/vm_behavior.h
*
* Virtual memory map behavior definitions.
*
*/
#ifndef _MACH_VM_BEHAVIOR_H_
#define _MACH_VM_BEHAVIOR_H_
/*
* Types defined:
*
* vm_behavior_t behavior codes.
*/
typedef int vm_behavior_t;
/*
* Enumeration of valid values for vm_behavior_t.
* These describe expected page reference behavior for
* for a given range of virtual memory. For implementation
* details see vm/vm_fault.c
*/
/*
* The following behaviors affect the memory region's future behavior
* and are stored in the VM map entry data structure.
*/
#define VM_BEHAVIOR_DEFAULT ((vm_behavior_t) 0) /* default */
#define VM_BEHAVIOR_RANDOM ((vm_behavior_t) 1) /* random */
#define VM_BEHAVIOR_SEQUENTIAL ((vm_behavior_t) 2) /* forward sequential */
#define VM_BEHAVIOR_RSEQNTL ((vm_behavior_t) 3) /* reverse sequential */
/*
* The following "behaviors" affect the memory region only at the time of the
* call and are not stored in the VM map entry.
*/
#define VM_BEHAVIOR_WILLNEED ((vm_behavior_t) 4) /* will need in near future */
#define VM_BEHAVIOR_DONTNEED ((vm_behavior_t) 5) /* dont need in near future */
#define VM_BEHAVIOR_FREE ((vm_behavior_t) 6) /* free memory without write-back */
#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 */
#define VM_BEHAVIOR_REUSABLE ((vm_behavior_t) 8)
#define VM_BEHAVIOR_REUSE ((vm_behavior_t) 9)
#define VM_BEHAVIOR_CAN_REUSE ((vm_behavior_t) 10)
#define VM_BEHAVIOR_PAGEOUT ((vm_behavior_t) 11)
#define VM_BEHAVIOR_ZERO ((vm_behavior_t) 12) /* zero pages without faulting in additional pages */
#endif /*_MACH_VM_BEHAVIOR_H_*/