80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
/*
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* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* @OSF_COPYRIGHT@
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*/
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/*
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* File: mach/vm_behavior.h
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*
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* Virtual memory map behavior definitions.
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*
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*/
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#ifndef _MACH_VM_BEHAVIOR_H_
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#define _MACH_VM_BEHAVIOR_H_
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/*
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* Types defined:
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*
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* vm_behavior_t behavior codes.
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*/
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typedef int vm_behavior_t;
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/*
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* Enumeration of valid values for vm_behavior_t.
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* These describe expected page reference behavior for
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* for a given range of virtual memory. For implementation
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* details see vm/vm_fault.c
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*/
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/*
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* The following behaviors affect the memory region's future behavior
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* and are stored in the VM map entry data structure.
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*/
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#define VM_BEHAVIOR_DEFAULT ((vm_behavior_t) 0) /* default */
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#define VM_BEHAVIOR_RANDOM ((vm_behavior_t) 1) /* random */
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#define VM_BEHAVIOR_SEQUENTIAL ((vm_behavior_t) 2) /* forward sequential */
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#define VM_BEHAVIOR_RSEQNTL ((vm_behavior_t) 3) /* reverse sequential */
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/*
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* The following "behaviors" affect the memory region only at the time of the
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* call and are not stored in the VM map entry.
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*/
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#define VM_BEHAVIOR_WILLNEED ((vm_behavior_t) 4) /* will need in near future */
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#define VM_BEHAVIOR_DONTNEED ((vm_behavior_t) 5) /* dont need in near future */
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#define VM_BEHAVIOR_FREE ((vm_behavior_t) 6) /* free memory without write-back */
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#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 */
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#define VM_BEHAVIOR_REUSABLE ((vm_behavior_t) 8)
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#define VM_BEHAVIOR_REUSE ((vm_behavior_t) 9)
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#define VM_BEHAVIOR_CAN_REUSE ((vm_behavior_t) 10)
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#define VM_BEHAVIOR_PAGEOUT ((vm_behavior_t) 11)
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#endif /*_MACH_VM_BEHAVIOR_H_*/
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