| | 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 | #ifdef KERNEL |
| | 60 | typedef int pager_return_t; |
| | 61 | |
| | 62 | extern vm_pager_t vm_pager_allocate(void); |
| | 63 | extern void vm_pager_deallocate(void); |
| | 64 | extern pager_return_t vm_pager_get(void); |
| | 65 | extern pager_return_t vm_pager_put(void); |
| | 66 | extern boolean_t vm_pager_has_page(void); |
| | 67 | #endif /* KERNEL */ |
| | 68 | |
| | 69 | #endif /* _VM_PAGER_ */ |
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