usr/src/sys/vm/vm_pageout.h

/*
 * 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.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)vm_pageout.h        7.6 (Berkeley) %G%
 *
 *
 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Avadis Tevanian, Jr.
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

/*
 *      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)&cnt.v_free_count, \
                                &vm_pages_needed_lock, FALSE); \
                        }
#ifdef KERNEL
void             vm_pageout __P((void));
void             vm_pageout_scan __P((void));
#endif