/* * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved. * * @APPLE_LICENSE_OSREFERENCE_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 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_OSREFERENCE_HEADER_END@ */ /* * Mach Operating System * Copyright (c) 1987 Carnegie-Mellon University * All rights reserved. The CMU software License Agreement specifies * the terms and conditions for use and redistribution. */ /* * File: vm_pager.h * Author: Avadis Tevanian, Jr., Michael Wayne Young * * Copyright (C) 1986, Avadis Tevanian, Jr., Michael Wayne Young * Copyright (C) 1985, Avadis Tevanian, Jr., Michael Wayne Young * * Pager routine interface definition */ #ifndef _VM_PAGER_ #define _VM_PAGER_ #include <mach/boolean.h> struct pager_struct { boolean_t is_device; }; typedef struct pager_struct *vm_pager_t; #define vm_pager_null ((vm_pager_t) 0) #define PAGER_SUCCESS 0 /* page read or written */ #define PAGER_ABSENT 1 /* pager does not have page */ #define PAGER_ERROR 2 /* pager unable to read or write page */ #ifdef KERNEL typedef int pager_return_t; extern vm_pager_t vm_pager_allocate(void); extern void vm_pager_deallocate(void); extern pager_return_t vm_pager_get(void); extern pager_return_t vm_pager_put(void); extern boolean_t vm_pager_has_page(void); #endif /* KERNEL */ #endif /* _VM_PAGER_ */