projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| d9a64523 A |
1 | /* |
| 2 | * Copyright (c) 2017 Apple 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 | ||
| 30 | #include <pthread/priority_private.h> | |
| 31 | ||
| 32 | #ifndef QOS_MIN_RELATIVE_PRIORITY // from <sys/qos.h> in userspace | |
| 33 | #define QOS_MIN_RELATIVE_PRIORITY -15 | |
| 34 | #endif | |
| 35 | ||
| 36 | pthread_priority_t | |
| 37 | _pthread_priority_normalize(pthread_priority_t pp) | |
| 38 | { | |
| 39 | if (pp & _PTHREAD_PRIORITY_EVENT_MANAGER_FLAG) { | |
| 40 | return _PTHREAD_PRIORITY_EVENT_MANAGER_FLAG; | |
| 41 | } | |
| 42 | if (_pthread_priority_has_qos(pp)) { | |
| 43 | int relpri = _pthread_priority_relpri(pp); | |
| 44 | if (relpri > 0 || relpri < QOS_MIN_RELATIVE_PRIORITY) { | |
| 45 | pp |= _PTHREAD_PRIORITY_PRIORITY_MASK; | |
| 46 | } | |
| 47 | return pp & (_PTHREAD_PRIORITY_OVERCOMMIT_FLAG | | |
| 0a7de745 A |
48 | _PTHREAD_PRIORITY_FALLBACK_FLAG | |
| 49 | _PTHREAD_PRIORITY_QOS_CLASS_MASK | | |
| 50 | _PTHREAD_PRIORITY_PRIORITY_MASK); | |
| d9a64523 A |
51 | } |
| 52 | return _pthread_unspecified_priority(); | |
| 53 | } | |
| 54 | ||
| 55 | pthread_priority_t | |
| 56 | _pthread_priority_normalize_for_ipc(pthread_priority_t pp) | |
| 57 | { | |
| 58 | if (_pthread_priority_has_qos(pp)) { | |
| 59 | int relpri = _pthread_priority_relpri(pp); | |
| 60 | if (relpri > 0 || relpri < QOS_MIN_RELATIVE_PRIORITY) { | |
| 61 | pp |= _PTHREAD_PRIORITY_PRIORITY_MASK; | |
| 62 | } | |
| 63 | return pp & (_PTHREAD_PRIORITY_QOS_CLASS_MASK | | |
| 0a7de745 | 64 | _PTHREAD_PRIORITY_PRIORITY_MASK); |
| d9a64523 A |
65 | } |
| 66 | return _pthread_unspecified_priority(); | |
| 67 | } | |
| 68 | ||
| 69 | pthread_priority_t | |
| 70 | _pthread_priority_combine(pthread_priority_t base_pp, thread_qos_t qos) | |
| 71 | { | |
| 72 | if (base_pp & _PTHREAD_PRIORITY_EVENT_MANAGER_FLAG) { | |
| 73 | return _PTHREAD_PRIORITY_EVENT_MANAGER_FLAG; | |
| 74 | } | |
| 75 | ||
| 76 | if (base_pp & _PTHREAD_PRIORITY_FALLBACK_FLAG) { | |
| 77 | if (!qos) { | |
| 78 | return base_pp; | |
| 79 | } | |
| 80 | } else if (qos < _pthread_priority_thread_qos(base_pp)) { | |
| 81 | return base_pp; | |
| 82 | } | |
| 83 | ||
| 84 | return _pthread_priority_make_from_thread_qos(qos, 0, | |
| 0a7de745 | 85 | base_pp & _PTHREAD_PRIORITY_OVERCOMMIT_FLAG); |
| d9a64523 | 86 | } |