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 | * | |
| 6 | * The contents of this file constitute Original Code as defined in and | |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| 11 | * | |
| 12 | * This Original Code and all software distributed under the License are | |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the | |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 19 | * | |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * Mach Operating System | |
| 24 | * Copyright (c) 1987 Carnegie-Mellon University | |
| 25 | * All rights reserved. The CMU software License Agreement specifies | |
| 26 | * the terms and conditions for use and redistribution. | |
| 27 | */ | |
| 28 | /* | |
| 29 | * File: vm_pager.h | |
| 30 | * Author: Avadis Tevanian, Jr., Michael Wayne Young | |
| 31 | * | |
| 32 | * Copyright (C) 1986, Avadis Tevanian, Jr., Michael Wayne Young | |
| 33 | * Copyright (C) 1985, Avadis Tevanian, Jr., Michael Wayne Young | |
| 34 | * | |
| 35 | * Pager routine interface definition | |
| 36 | */ | |
| 37 | ||
| 38 | #ifndef _VM_PAGER_ | |
| 39 | #define _VM_PAGER_ | |
| 40 | ||
| 41 | #include <mach/boolean.h> | |
| 42 | ||
| 43 | struct pager_struct { | |
| 44 | boolean_t is_device; | |
| 45 | }; | |
| 46 | typedef struct pager_struct *vm_pager_t; | |
| 47 | #define vm_pager_null ((vm_pager_t) 0) | |
| 48 | ||
| 49 | #define PAGER_SUCCESS 0 /* page read or written */ | |
| 50 | #define PAGER_ABSENT 1 /* pager does not have page */ | |
| 51 | #define PAGER_ERROR 2 /* pager unable to read or write page */ | |
| 52 | ||
| 53 | #ifdef KERNEL | |
| 54 | typedef int pager_return_t; | |
| 55 | ||
| 56 | vm_pager_t vm_pager_allocate(); | |
| 57 | void vm_pager_deallocate(); | |
| 58 | pager_return_t vm_pager_get(); | |
| 59 | pager_return_t vm_pager_put(); | |
| 60 | boolean_t vm_pager_has_page(); | |
| 61 | #endif /* KERNEL */ | |
| 62 | ||
| 63 | #endif /* _VM_PAGER_ */ |