1 /* 2 * Copyright (c) 2000 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 * Mach Operating System 30 * Copyright (c) 1987 Carnegie-Mellon University 31 * All rights reserved. The CMU software License Agreement specifies 32 * the terms and conditions for use and redistribution. 33 */ 34 /* 35 * File: vm_pager.h 36 * Author: Avadis Tevanian, Jr., Michael Wayne Young 37 * 38 * Copyright (C) 1986, Avadis Tevanian, Jr., Michael Wayne Young 39 * Copyright (C) 1985, Avadis Tevanian, Jr., Michael Wayne Young 40 * 41 * Pager routine interface definition 42 */ 43 44 #ifndef _VM_PAGER_ 45 #define _VM_PAGER_ 46 47 #include <mach/boolean.h> 48 49 struct pager_struct { 50 boolean_t is_device; 51 }; 52 typedef struct pager_struct *vm_pager_t; 53 #define vm_pager_null ((vm_pager_t) 0) 54 55 #define PAGER_SUCCESS 0 /* page read or written */ 56 #define PAGER_ABSENT 1 /* pager does not have page */ 57 #define PAGER_ERROR 2 /* pager unable to read or write page */ 58 59 #if 0 60 #ifdef KERNEL 61 typedef int pager_return_t; 62 63 extern vm_pager_t vm_pager_allocate(void); 64 extern void vm_pager_deallocate(void); 65 extern pager_return_t vm_pager_get(void); 66 extern pager_return_t vm_pager_put(void); 67 extern boolean_t vm_pager_has_page(void); 68 #endif /* KERNEL */ 69 #endif 70 71 #endif /* _VM_PAGER_ */ 72