/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This 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 OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_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; vm_pager_t vm_pager_allocate(); void vm_pager_deallocate(); pager_return_t vm_pager_get(); pager_return_t vm_pager_put(); boolean_t vm_pager_has_page(); #endif /* KERNEL */ #endif /* _VM_PAGER_ */