1 |
|
|
/* $OpenBSD: rthread_sched.c,v 1.14 2017/09/05 02:40:54 guenther Exp $ */ |
2 |
|
|
/* |
3 |
|
|
* Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org> |
4 |
|
|
* All Rights Reserved. |
5 |
|
|
* |
6 |
|
|
* Permission to use, copy, modify, and distribute this software for any |
7 |
|
|
* purpose with or without fee is hereby granted, provided that the above |
8 |
|
|
* copyright notice and this permission notice appear in all copies. |
9 |
|
|
* |
10 |
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
11 |
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
12 |
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
13 |
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
14 |
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
15 |
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
16 |
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
17 |
|
|
*/ |
18 |
|
|
/* |
19 |
|
|
* scheduling routines |
20 |
|
|
*/ |
21 |
|
|
|
22 |
|
|
#include <unistd.h> |
23 |
|
|
#include <signal.h> |
24 |
|
|
#include <errno.h> |
25 |
|
|
|
26 |
|
|
#include <pthread.h> |
27 |
|
|
#include <pthread_np.h> |
28 |
|
|
|
29 |
|
|
#include "rthread.h" |
30 |
|
|
|
31 |
|
|
int |
32 |
|
|
pthread_getschedparam(pthread_t thread, int *policy, |
33 |
|
|
struct sched_param *param) |
34 |
|
|
{ |
35 |
|
|
if (!_threads_ready) |
36 |
|
|
_rthread_init(); |
37 |
|
|
|
38 |
|
|
*policy = thread->attr.sched_policy; |
39 |
|
|
if (param) |
40 |
|
|
*param = thread->attr.sched_param; |
41 |
|
|
|
42 |
|
|
return (0); |
43 |
|
|
} |
44 |
|
|
|
45 |
|
|
int |
46 |
|
|
pthread_setschedparam(pthread_t thread, int policy, |
47 |
|
|
const struct sched_param *param) |
48 |
|
|
{ |
49 |
|
|
if (!_threads_ready) |
50 |
|
|
_rthread_init(); |
51 |
|
|
|
52 |
|
|
/* XXX return ENOTSUP for SCHED_{FIFO,RR}? */ |
53 |
|
|
if (policy != SCHED_OTHER && policy != SCHED_FIFO && |
54 |
|
|
policy != SCHED_RR) |
55 |
|
|
return (EINVAL); |
56 |
|
|
thread->attr.sched_policy = policy; |
57 |
|
|
if (param) |
58 |
|
|
thread->attr.sched_param = *param; |
59 |
|
|
|
60 |
|
|
return (0); |
61 |
|
|
} |
62 |
|
|
|
63 |
|
|
int |
64 |
|
|
pthread_attr_getschedparam(const pthread_attr_t *attrp, |
65 |
|
|
struct sched_param *param) |
66 |
|
|
{ |
67 |
|
|
*param = (*attrp)->sched_param; |
68 |
|
|
|
69 |
|
|
return (0); |
70 |
|
|
} |
71 |
|
|
|
72 |
|
|
int |
73 |
|
|
pthread_attr_setschedparam(pthread_attr_t *attrp, |
74 |
|
|
const struct sched_param *param) |
75 |
|
|
{ |
76 |
|
|
(*attrp)->sched_param = *param; |
77 |
|
|
|
78 |
|
|
return (0); |
79 |
|
|
} |
80 |
|
|
|
81 |
|
|
int |
82 |
|
|
pthread_attr_getschedpolicy(const pthread_attr_t *attrp, int *policy) |
83 |
|
|
{ |
84 |
|
|
*policy = (*attrp)->sched_policy; |
85 |
|
|
|
86 |
|
|
return (0); |
87 |
|
|
} |
88 |
|
|
|
89 |
|
|
int |
90 |
|
|
pthread_attr_setschedpolicy(pthread_attr_t *attrp, int policy) |
91 |
|
|
{ |
92 |
|
|
/* XXX return ENOTSUP for SCHED_{FIFO,RR}? */ |
93 |
|
|
if (policy != SCHED_OTHER && policy != SCHED_FIFO && |
94 |
|
|
policy != SCHED_RR) |
95 |
|
|
return (EINVAL); |
96 |
|
|
(*attrp)->sched_policy = policy; |
97 |
|
|
|
98 |
|
|
return (0); |
99 |
|
|
} |
100 |
|
|
|
101 |
|
|
int |
102 |
|
|
pthread_attr_getinheritsched(const pthread_attr_t *attrp, int *inherit) |
103 |
|
|
{ |
104 |
|
|
*inherit = (*attrp)->sched_inherit; |
105 |
|
|
|
106 |
|
|
return (0); |
107 |
|
|
} |
108 |
|
|
|
109 |
|
|
int |
110 |
|
|
pthread_attr_setinheritsched(pthread_attr_t *attrp, int inherit) |
111 |
|
|
{ |
112 |
|
|
if (inherit != PTHREAD_INHERIT_SCHED && |
113 |
|
|
inherit != PTHREAD_EXPLICIT_SCHED) |
114 |
|
|
return (EINVAL); |
115 |
|
|
(*attrp)->sched_inherit = inherit; |
116 |
|
|
|
117 |
|
|
return (0); |
118 |
|
|
} |
119 |
|
|
|
120 |
|
|
int |
121 |
|
|
pthread_getprio(pthread_t thread) |
122 |
|
|
{ |
123 |
|
|
if (!_threads_ready) |
124 |
|
|
_rthread_init(); |
125 |
|
|
|
126 |
|
|
return (thread->attr.sched_param.sched_priority); |
127 |
|
|
} |
128 |
|
|
|
129 |
|
|
int |
130 |
|
|
pthread_setprio(pthread_t thread, int priority) |
131 |
|
|
{ |
132 |
|
|
if (!_threads_ready) |
133 |
|
|
_rthread_init(); |
134 |
|
|
|
135 |
|
|
thread->attr.sched_param.sched_priority = priority; |
136 |
|
|
|
137 |
|
|
return (0); |
138 |
|
|
} |
139 |
|
|
|
140 |
|
|
void |
141 |
|
|
pthread_yield(void) |
142 |
|
|
{ |
143 |
|
7699488 |
sched_yield(); |
144 |
|
3849744 |
} |
145 |
|
|
|