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Annotation of kernel/vm/vm_pageout.h, revision 1.1.1.1

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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