1/*
2 * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*!
29	@header kern_memorystatus.h
30	This header defines a kernel event subclass for the OSMemoryNotification API
31 */
32
33#ifndef SYS_KERN_MEMORYSTATUS_H
34#define SYS_KERN_MEMORYSTATUS_H
35
36/*
37 * Define Memory Status event subclass.
38 * Subclass of KEV_SYSTEM_CLASS
39 */
40
41/*!
42	@defined KEV_MEMORYSTATUS_SUBCLASS
43	@discussion The kernel event subclass for memory status events.
44*/
45#define KEV_MEMORYSTATUS_SUBCLASS        3
46
47enum {
48	kMemoryStatusLevelAny = -1,
49	kMemoryStatusLevelNormal = 0,
50	kMemoryStatusLevelWarning = 1,
51	kMemoryStatusLevelUrgent = 2,
52	kMemoryStatusLevelCritical = 3
53};
54
55#ifdef KERNEL
56extern void kern_memorystatus_init(void) __attribute__((section("__TEXT, initcode")));
57
58extern int kern_memorystatus_wakeup;
59extern int kern_memorystatus_level;
60
61#endif /* KERNEL */
62#endif /* SYS_KERN_MEMORYSTATUS_H */
63