xnu-1228.tar.gz

[apple/xnu.git] / bsd / sys / kern_memorystatus.h

diff --git a/bsd/sys/kern_memorystatus.h b/bsd/sys/kern_memorystatus.h
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+/*
+ * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+/*!
+       @header kern_memorystatus.h
+       This header defines a kernel event subclass for the OSMemoryNotification API
+ */
+
+#ifndef SYS_KERN_MEMORYSTATUS_H
+#define SYS_KERN_MEMORYSTATUS_H
+
+/*
+ * Define Memory Status event subclass.
+ * Subclass of KEV_SYSTEM_CLASS
+ */
+
+/*!
+       @defined KEV_MEMORYSTATUS_SUBCLASS
+       @discussion The kernel event subclass for memory status events.
+*/
+#define KEV_MEMORYSTATUS_SUBCLASS        3
+
+enum {
+       kMemoryStatusLevelAny = -1,
+       kMemoryStatusLevelNormal = 0,
+       kMemoryStatusLevelWarning = 1,
+       kMemoryStatusLevelUrgent = 2,
+       kMemoryStatusLevelCritical = 3
+};
+
+#ifdef KERNEL
+extern void kern_memorystatus_init(void) __attribute__((section("__TEXT, initcode")));
+
+extern int kern_memorystatus_wakeup;
+extern int kern_memorystatus_level;
+
+#endif /* KERNEL */
+#endif /* SYS_KERN_MEMORYSTATUS_H */