libpthread-454.40.3.tar.gz

[apple/libpthread.git] / private / sys / qos_private.h

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+/*
+ * Copyright (c) 2014 Apple Inc. All rights reserved.
+ *
+ * @APPLE_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. 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_LICENSE_HEADER_END@
+ */
+
+#ifndef _QOS_SYS_PRIVATE_H
+#define _QOS_SYS_PRIVATE_H
+
+/*! 
+ * @constant QOS_CLASS_MAINTENANCE
+ * @abstract A QOS class which indicates work performed by this thread was not
+ * initiated by the user and that the user may be unaware of the results.
+ * @discussion Such work is requested to run at a priority far below other work
+ * including significant I/O throttling. The use of this QOS class indicates
+ * the work should be run in the most energy and thermally-efficient manner
+ * possible, and may be deferred for a long time in order to preserve
+ * system responsiveness for the user.
+ * This is SPI for use by Spotlight and Time Machine only.
+ */
+#define QOS_CLASS_MAINTENANCE  ((qos_class_t)0x05)
+
+#endif //_QOS_SYS_PRIVATE_H