/* * Copyright (c) 2013-2014 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_PRIVATE_H #define _QOS_PRIVATE_H #include <pthread/qos.h> #include <sys/qos_private.h> #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL // allow __DARWIN_C_LEVEL to turn off the use of mach_port_t #include <mach/port.h> #endif // pthread_priority_t is an on opaque integer that is guaranteed to be ordered such that // combations of QoS classes and relative priorities are ordered numerically, according to // their combined priority. typedef unsigned long pthread_priority_t; // masks for splitting the handling the contents of a pthread_priority_t, the mapping from // qos_class_t to the class bits, however, is intentionally not exposed. #define _PTHREAD_PRIORITY_FLAGS_MASK (~0xffffff) #define _PTHREAD_PRIORITY_QOS_CLASS_MASK 0x00ffff00 #define _PTHREAD_PRIORITY_QOS_CLASS_SHIFT (8ull) #define _PTHREAD_PRIORITY_PRIORITY_MASK 0x000000ff #define _PTHREAD_PRIORITY_PRIORITY_SHIFT (0) #define _PTHREAD_PRIORITY_OVERCOMMIT_FLAG 0x80000000 #define _PTHREAD_PRIORITY_INHERIT_FLAG 0x40000000 #define _PTHREAD_PRIORITY_ROOTQUEUE_FLAG 0x20000000 #define _PTHREAD_PRIORITY_ENFORCE_FLAG 0x10000000 #define _PTHREAD_PRIORITY_OVERRIDE_FLAG 0x08000000 // redeffed here to avoid leaving __QOS_ENUM defined in the public header #define __QOS_ENUM(name, type, ...) enum { __VA_ARGS__ }; typedef type name##_t #define __QOS_AVAILABLE_STARTING(x, y) #if defined(__has_feature) && defined(__has_extension) #if __has_feature(objc_fixed_enum) || __has_extension(cxx_strong_enums) #undef __QOS_ENUM #define __QOS_ENUM(name, type, ...) typedef enum : type { __VA_ARGS__ } name##_t #endif #if __has_feature(enumerator_attributes) #undef __QOS_AVAILABLE_STARTING #define __QOS_AVAILABLE_STARTING __OSX_AVAILABLE_STARTING #endif #endif __QOS_ENUM(_pthread_set_flags, unsigned int, _PTHREAD_SET_SELF_QOS_FLAG __QOS_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0) = 0x1, _PTHREAD_SET_SELF_VOUCHER_FLAG __QOS_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0) = 0x2, _PTHREAD_SET_SELF_FIXEDPRIORITY_FLAG __QOS_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0) = 0x4, ); #undef __QOS_ENUM #undef __QOS_AVAILABLE_STARTING #ifndef KERNEL __BEGIN_DECLS /*! * @function pthread_set_qos_class_np * * @abstract * Sets the requested QOS class and relative priority of the current thread. * * @discussion * The QOS class and relative priority represent an overall combination of * system quality of service attributes on a thread. * * Subsequent calls to interfaces such as pthread_setschedparam() that are * incompatible or in conflict with the QOS class system will unset the QOS * class requested with this interface and pthread_get_qos_class_np() will * return QOS_CLASS_UNSPECIFIED thereafter. A thread so modified is permanently * opted-out of the QOS class system and calls to this function to request a QOS * class for such a thread will fail and return EPERM. * * @param __pthread * The current thread as returned by pthread_self(). * EINVAL will be returned if any other thread is provided. * * @param __qos_class * A QOS class value: * - QOS_CLASS_USER_INTERACTIVE * - QOS_CLASS_USER_INITIATED * - QOS_CLASS_DEFAULT * - QOS_CLASS_UTILITY * - QOS_CLASS_BACKGROUND * - QOS_CLASS_MAINTENANCE * EINVAL will be returned if any other value is provided. * * @param __relative_priority * A relative priority within the QOS class. This value is a negative offset * from the maximum supported scheduler priority for the given class. * EINVAL will be returned if the value is greater than zero or less than * QOS_MIN_RELATIVE_PRIORITY. * * @return * Zero if successful, othwerise an errno value. */ __OSX_AVAILABLE_BUT_DEPRECATED_MSG(__MAC_10_10, __MAC_10_10, __IPHONE_8_0, __IPHONE_8_0, \ "Use pthread_set_qos_class_self_np() instead") int pthread_set_qos_class_np(pthread_t __pthread, qos_class_t __qos_class, int __relative_priority); /* Private interfaces for libdispatch to encode/decode specific values of pthread_priority_t. */ // Encode a class+priority pair into a pthread_priority_t, __OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0) pthread_priority_t _pthread_qos_class_encode(qos_class_t qos_class, int relative_priority, unsigned long flags); // Decode a pthread_priority_t into a class+priority pair. __OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0) qos_class_t _pthread_qos_class_decode(pthread_priority_t priority, int *relative_priority, unsigned long *flags); // Encode a legacy workqueue API priority into a pthread_priority_t __OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0) pthread_priority_t _pthread_qos_class_encode_workqueue(int queue_priority, unsigned long flags); #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL // Set QoS or voucher, or both, on pthread_self() __OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0) int _pthread_set_properties_self(_pthread_set_flags_t flags, pthread_priority_t priority, mach_port_t voucher); // Set self to fixed priority without disturbing QoS or priority __OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0) int pthread_set_fixedpriority_self(void); #endif __END_DECLS #endif // KERNEL #endif //_QOS_PRIVATE_H