1 /* 2 * Copyright (c) 1986, Avadis Tevanian, Jr. 3 * Copyright (c) 1987 Carnegie-Mellon University 4 * Copyright (c) 1991 Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * The Mach Operating System project at Carnegie-Mellon University. 9 * 10 * The CMU software License Agreement specifies the terms and conditions 11 * for use and redistribution. 12 * 13 * @(#)vm_pageout.h 7.1 (Berkeley) 12/05/90 14 */ 15 16 /* 17 * Header file for pageout daemon. 18 */ 19 20 #include "lock.h" 21 22 /* 23 * Exported data structures. 24 */ 25 26 extern int vm_pages_needed; /* should be some "event" structure */ 27 simple_lock_data_t vm_pages_needed_lock; 28 29 30 /* 31 * Exported routines. 32 */ 33 34 /* 35 * Signal pageout-daemon and wait for it. 36 */ 37 38 #define VM_WAIT { \ 39 simple_lock(&vm_pages_needed_lock); \ 40 thread_wakeup((int)&vm_pages_needed); \ 41 thread_sleep((int)&vm_page_free_count, \ 42 &vm_pages_needed_lock, FALSE); \ 43 } 44