sys/qos_private.h

   1 /*
   2  * Copyright (c) 2014 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #ifndef _QOS_SYS_PRIVATE_H
  25 #define _QOS_SYS_PRIVATE_H
  26
  27 /*!
  28  * @constant QOS_CLASS_MAINTENANCE
  29  * @abstract A QOS class which indicates work performed by this thread was not
  30  * initiated by the user and that the user may be unaware of the results.
  31  * @discussion Such work is requested to run at a priority far below other work
  32  * including significant I/O throttling. The use of this QOS class indicates
  33  * the work should be run in the most energy and thermally-efficient manner
  34  * possible, and may be deferred for a long time in order to preserve
  35  * system responsiveness for the user.
  36  * This is SPI for use by Spotlight and Time Machine only.
  37  */
  38 #define QOS_CLASS_MAINTENANCE   0x05
  39
  40 #endif //_QOS_SYS_PRIVATE_H