1*27b03b36SApple OSS Distributions /*
2*27b03b36SApple OSS Distributions * Copyright (c) 2017 Apple Inc. All rights reserved.
3*27b03b36SApple OSS Distributions *
4*27b03b36SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*27b03b36SApple OSS Distributions *
6*27b03b36SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*27b03b36SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*27b03b36SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*27b03b36SApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*27b03b36SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*27b03b36SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*27b03b36SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*27b03b36SApple OSS Distributions * terms of an Apple operating system software license agreement.
14*27b03b36SApple OSS Distributions *
15*27b03b36SApple OSS Distributions * Please obtain a copy of the License at
16*27b03b36SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*27b03b36SApple OSS Distributions *
18*27b03b36SApple OSS Distributions * The Original Code and all software distributed under the License are
19*27b03b36SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*27b03b36SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*27b03b36SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*27b03b36SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*27b03b36SApple OSS Distributions * Please see the License for the specific language governing rights and
24*27b03b36SApple OSS Distributions * limitations under the License.
25*27b03b36SApple OSS Distributions *
26*27b03b36SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*27b03b36SApple OSS Distributions *
28*27b03b36SApple OSS Distributions */
29*27b03b36SApple OSS Distributions
30*27b03b36SApple OSS Distributions #include <pthread/priority_private.h>
31*27b03b36SApple OSS Distributions
32*27b03b36SApple OSS Distributions #ifndef QOS_MIN_RELATIVE_PRIORITY // from <sys/qos.h> in userspace
33*27b03b36SApple OSS Distributions #define QOS_MIN_RELATIVE_PRIORITY -15
34*27b03b36SApple OSS Distributions #endif
35*27b03b36SApple OSS Distributions
36*27b03b36SApple OSS Distributions pthread_priority_compact_t
_pthread_priority_normalize(pthread_priority_t pp)37*27b03b36SApple OSS Distributions _pthread_priority_normalize(pthread_priority_t pp)
38*27b03b36SApple OSS Distributions {
39*27b03b36SApple OSS Distributions if (pp & _PTHREAD_PRIORITY_EVENT_MANAGER_FLAG) {
40*27b03b36SApple OSS Distributions return _PTHREAD_PRIORITY_EVENT_MANAGER_FLAG;
41*27b03b36SApple OSS Distributions }
42*27b03b36SApple OSS Distributions if (_pthread_priority_has_qos(pp)) {
43*27b03b36SApple OSS Distributions int relpri = _pthread_priority_relpri(pp);
44*27b03b36SApple OSS Distributions if (relpri > 0 || relpri < QOS_MIN_RELATIVE_PRIORITY) {
45*27b03b36SApple OSS Distributions pp |= _PTHREAD_PRIORITY_PRIORITY_MASK;
46*27b03b36SApple OSS Distributions }
47*27b03b36SApple OSS Distributions return pp & (_PTHREAD_PRIORITY_OVERCOMMIT_FLAG |
48*27b03b36SApple OSS Distributions _PTHREAD_PRIORITY_FALLBACK_FLAG |
49*27b03b36SApple OSS Distributions _PTHREAD_PRIORITY_QOS_CLASS_MASK |
50*27b03b36SApple OSS Distributions _PTHREAD_PRIORITY_PRIORITY_MASK);
51*27b03b36SApple OSS Distributions }
52*27b03b36SApple OSS Distributions return _pthread_unspecified_priority();
53*27b03b36SApple OSS Distributions }
54*27b03b36SApple OSS Distributions
55*27b03b36SApple OSS Distributions pthread_priority_compact_t
_pthread_priority_normalize_for_ipc(pthread_priority_t pp)56*27b03b36SApple OSS Distributions _pthread_priority_normalize_for_ipc(pthread_priority_t pp)
57*27b03b36SApple OSS Distributions {
58*27b03b36SApple OSS Distributions if (_pthread_priority_has_qos(pp)) {
59*27b03b36SApple OSS Distributions int relpri = _pthread_priority_relpri(pp);
60*27b03b36SApple OSS Distributions if (relpri > 0 || relpri < QOS_MIN_RELATIVE_PRIORITY) {
61*27b03b36SApple OSS Distributions pp |= _PTHREAD_PRIORITY_PRIORITY_MASK;
62*27b03b36SApple OSS Distributions }
63*27b03b36SApple OSS Distributions return pp & (_PTHREAD_PRIORITY_QOS_CLASS_MASK |
64*27b03b36SApple OSS Distributions _PTHREAD_PRIORITY_PRIORITY_MASK);
65*27b03b36SApple OSS Distributions }
66*27b03b36SApple OSS Distributions return _pthread_unspecified_priority();
67*27b03b36SApple OSS Distributions }
68*27b03b36SApple OSS Distributions
69*27b03b36SApple OSS Distributions pthread_priority_compact_t
_pthread_priority_combine(pthread_priority_t base_pp,thread_qos_t qos)70*27b03b36SApple OSS Distributions _pthread_priority_combine(pthread_priority_t base_pp, thread_qos_t qos)
71*27b03b36SApple OSS Distributions {
72*27b03b36SApple OSS Distributions if (base_pp & _PTHREAD_PRIORITY_EVENT_MANAGER_FLAG) {
73*27b03b36SApple OSS Distributions return _PTHREAD_PRIORITY_EVENT_MANAGER_FLAG;
74*27b03b36SApple OSS Distributions }
75*27b03b36SApple OSS Distributions
76*27b03b36SApple OSS Distributions if (base_pp & _PTHREAD_PRIORITY_FALLBACK_FLAG) {
77*27b03b36SApple OSS Distributions if (!qos) {
78*27b03b36SApple OSS Distributions return (pthread_priority_compact_t)base_pp;
79*27b03b36SApple OSS Distributions }
80*27b03b36SApple OSS Distributions } else if (qos < _pthread_priority_thread_qos(base_pp)) {
81*27b03b36SApple OSS Distributions return (pthread_priority_compact_t)base_pp;
82*27b03b36SApple OSS Distributions }
83*27b03b36SApple OSS Distributions
84*27b03b36SApple OSS Distributions return _pthread_priority_make_from_thread_qos(qos, 0,
85*27b03b36SApple OSS Distributions base_pp & _PTHREAD_PRIORITY_OVERCOMMIT_FLAG);
86*27b03b36SApple OSS Distributions }
87