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