1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * The Mach Operating System project at Carnegie-Mellon University. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)vm_pageout.h 8.3 (Berkeley) 01/09/95 11 * 12 * 13 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 14 * All rights reserved. 15 * 16 * Author: Avadis Tevanian, Jr. 17 * 18 * Permission to use, copy, modify and distribute this software and 19 * its documentation is hereby granted, provided that both the copyright 20 * notice and this permission notice appear in all copies of the 21 * software, derivative works or modified versions, and any portions 22 * thereof, and that both notices appear in supporting documentation. 23 * 24 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 25 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 26 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 27 * 28 * Carnegie Mellon requests users of this software to return to 29 * 30 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 31 * School of Computer Science 32 * Carnegie Mellon University 33 * Pittsburgh PA 15213-3890 34 * 35 * any improvements or extensions that they make and grant Carnegie the 36 * rights to redistribute these changes. 37 */ 38 39 /* 40 * Header file for pageout daemon. 41 */ 42 43 /* 44 * Exported data structures. 45 */ 46 47 extern int vm_pages_needed; /* should be some "event" structure */ 48 simple_lock_data_t vm_pages_needed_lock; 49 50 51 /* 52 * Exported routines. 53 */ 54 55 /* 56 * Signal pageout-daemon and wait for it. 57 */ 58 59 #define VM_WAIT { \ 60 simple_lock(&vm_pages_needed_lock); \ 61 thread_wakeup(&vm_pages_needed); \ 62 thread_sleep(&cnt.v_free_count, \ 63 &vm_pages_needed_lock, FALSE); \ 64 } 65 #ifdef KERNEL 66 void vm_pageout __P((void)); 67 void vm_pageout_scan __P((void)); 68 void vm_pageout_page __P((vm_page_t, vm_object_t)); 69 void vm_pageout_cluster __P((vm_page_t, vm_object_t)); 70 #endif 71