usr/src/sys/vm/vm_pageout.h

/*
 * Copyright (c) 1986, Avadis Tevanian, Jr.
 * Copyright (c) 1987 Carnegie-Mellon University
 * Copyright (c) 1991 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * The Mach Operating System project at Carnegie-Mellon University.
 *
 * The CMU software License Agreement specifies the terms and conditions
 * for use and redistribution.
 *
 *      @(#)vm_pageout.h        7.2 (Berkeley) %G%
 */

/*
 *      Header file for pageout daemon.
 */

/*
 *      Exported data structures.
 */

extern int      vm_pages_needed;        /* should be some "event" structure */
simple_lock_data_t      vm_pages_needed_lock;


/*
 *      Exported routines.
 */

/*
 *      Signal pageout-daemon and wait for it.
 */

#define VM_WAIT         { \
                        simple_lock(&vm_pages_needed_lock); \
                        thread_wakeup((int)&vm_pages_needed); \
                        thread_sleep((int)&vm_page_free_count, \
                                &vm_pages_needed_lock, FALSE); \
                        }