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Annotation of kernel/vm/vm_pageout.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* 
        !            26:  * Mach Operating System
        !            27:  * Copyright (c) 1987 Carnegie-Mellon University
        !            28:  * All rights reserved.  The CMU software License Agreement specifies
        !            29:  * the terms and conditions for use and redistribution.
        !            30:  */
        !            31: /*
        !            32:  *     File:   vm/vm_pageout.h
        !            33:  *     Author: Avadis Tevanian, Jr.
        !            34:  *
        !            35:  *     Copyright (C) 1986, Avadis Tevanian, Jr.
        !            36:  *
        !            37:  *     Header file for pageout daemon.
        !            38:  *
        !            39:  ************************************************************************
        !            40:  * HISTORY
        !            41:  * 19-Jan-88  Michael Young (mwyoung) at Carnegie-Mellon University
        !            42:  *     Declare vm_pageout_page().
        !            43:  *
        !            44:  * 29-Dec-87  David Golub (dbg) at Carnegie-Mellon University
        !            45:  *     Delinted.
        !            46:  *
        !            47:  * 15-May-87  Avadis Tevanian (avie) at Carnegie-Mellon University
        !            48:  *     Converted to new include technology.
        !            49:  *
        !            50:  * 17-Feb-87  David Golub (dbg) at Carnegie-Mellon University
        !            51:  *     Added lock (to avoid losing wakeups).  Moved VM_WAIT from
        !            52:  *     vm_page.h to this file.
        !            53:  *
        !            54:  *  9-Mar-86  Avadis Tevanian (avie) at Carnegie-Mellon University
        !            55:  *     Created.
        !            56:  ************************************************************************
        !            57:  */
        !            58: 
        !            59: #import <kern/lock.h>
        !            60: #import <kern/sched_prim.h>
        !            61: 
        !            62: /*
        !            63:  *     Exported data structures.
        !            64:  */
        !            65: 
        !            66: extern int     vm_pages_needed;        /* should be some "event" structure */
        !            67: extern simple_lock_data_t      vm_pages_needed_lock;
        !            68: 
        !            69: 
        !            70: /*
        !            71:  *     Exported routines.
        !            72:  */
        !            73: 
        !            74: #if    MACH_XP
        !            75: void   vm_pageout_page();
        !            76: #endif /* MACH_XP */
        !            77: 
        !            78: /*
        !            79:  *     Signal pageout-daemon and wait for it.
        !            80:  */
        !            81: 
        !            82: #define        VM_WAIT         { \
        !            83:                        simple_lock(&vm_pages_needed_lock); \
        !            84:                        thread_wakeup(&vm_pages_needed); \
        !            85:                        thread_sleep(&vm_page_free_count, \
        !            86:                                &vm_pages_needed_lock, FALSE); \
        !            87:                        }

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