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Annotation of XNU/bsd/vm/vm_pager.h, revision 1.1.1.1

1.1       root        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_ */

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