projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| ff6e181a A |
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. Please obtain a copy of the License at | |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 11 | * file. | |
| 1c79356b | 12 | * |
| ff6e181a A |
13 | * The Original Code and all software distributed under the License are |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 1c79356b A |
15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| ff6e181a A |
17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 18 | * Please see the License for the specific language governing rights and | |
| 19 | * limitations under the License. | |
| 1c79356b A |
20 | * |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | /* | |
| 24 | * Mach Operating System | |
| 25 | * Copyright (c) 1987 Carnegie-Mellon University | |
| 26 | * All rights reserved. The CMU software License Agreement specifies | |
| 27 | * the terms and conditions for use and redistribution. | |
| 28 | */ | |
| 29 | /* | |
| 30 | * File: vm_pager.h | |
| 31 | * Author: Avadis Tevanian, Jr., Michael Wayne Young | |
| 32 | * | |
| 33 | * Copyright (C) 1986, Avadis Tevanian, Jr., Michael Wayne Young | |
| 34 | * Copyright (C) 1985, Avadis Tevanian, Jr., Michael Wayne Young | |
| 35 | * | |
| 36 | * Pager routine interface definition | |
| 37 | */ | |
| 38 | ||
| 39 | #ifndef _VM_PAGER_ | |
| 40 | #define _VM_PAGER_ | |
| 41 | ||
| 42 | #include <mach/boolean.h> | |
| 43 | ||
| 44 | struct pager_struct { | |
| 45 | boolean_t is_device; | |
| 46 | }; | |
| 47 | typedef struct pager_struct *vm_pager_t; | |
| 48 | #define vm_pager_null ((vm_pager_t) 0) | |
| 49 | ||
| 50 | #define PAGER_SUCCESS 0 /* page read or written */ | |
| 51 | #define PAGER_ABSENT 1 /* pager does not have page */ | |
| 52 | #define PAGER_ERROR 2 /* pager unable to read or write page */ | |
| 53 | ||
| 54 | #ifdef KERNEL | |
| 55 | typedef int pager_return_t; | |
| 56 | ||
| 91447636 A |
57 | extern vm_pager_t vm_pager_allocate(void); |
| 58 | extern void vm_pager_deallocate(void); | |
| 59 | extern pager_return_t vm_pager_get(void); | |
| 60 | extern pager_return_t vm_pager_put(void); | |
| 61 | extern boolean_t vm_pager_has_page(void); | |
| 1c79356b A |
62 | #endif /* KERNEL */ |
| 63 | ||
| 64 | #endif /* _VM_PAGER_ */ |