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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* Linuxthreads - a simple clone()-based implementation of Posix */
/* threads for Linux. */
/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
/* */
/* This program is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU Library General Public License */
/* as published by the Free Software Foundation; either version 2 */
/* of the License, or (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU Library General Public License for more details. */
/* Handling of thread attributes */
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include "pthread.h"
#include "internals.h"
int __pthread_attr_init_2_1(pthread_attr_t *attr)
{
size_t ps = __getpagesize ();
attr->detachstate = PTHREAD_CREATE_JOINABLE;
attr->schedpolicy = SCHED_OTHER;
attr->schedparam.sched_priority = 0;
attr->inheritsched = PTHREAD_EXPLICIT_SCHED;
attr->scope = PTHREAD_SCOPE_SYSTEM;
attr->guardsize = ps;
attr->stackaddr = NULL;
attr->stackaddr_set = 0;
attr->stacksize = STACK_SIZE - ps;
return 0;
}
#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
default_symbol_version (__pthread_attr_init_2_1, pthread_attr_init, GLIBC_2.1);
int __pthread_attr_init_2_0(pthread_attr_t *attr)
{
attr->detachstate = PTHREAD_CREATE_JOINABLE;
attr->schedpolicy = SCHED_OTHER;
attr->schedparam.sched_priority = 0;
attr->inheritsched = PTHREAD_EXPLICIT_SCHED;
attr->scope = PTHREAD_SCOPE_SYSTEM;
return 0;
}
symbol_version (__pthread_attr_init_2_0, pthread_attr_init, GLIBC_2.0);
#else
strong_alias (__pthread_attr_init_2_1, pthread_attr_init)
#endif
int pthread_attr_destroy(pthread_attr_t *attr)
{
return 0;
}
int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate)
{
if (detachstate < PTHREAD_CREATE_JOINABLE ||
detachstate > PTHREAD_CREATE_DETACHED)
return EINVAL;
attr->detachstate = detachstate;
return 0;
}
int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate)
{
*detachstate = attr->detachstate;
return 0;
}
int pthread_attr_setschedparam(pthread_attr_t *attr,
const struct sched_param *param)
{
int max_prio = __sched_get_priority_max(attr->schedpolicy);
int min_prio = __sched_get_priority_min(attr->schedpolicy);
if (param->sched_priority < min_prio || param->sched_priority > max_prio)
return EINVAL;
memcpy (&attr->schedparam, param, sizeof (struct sched_param));
return 0;
}
int pthread_attr_getschedparam(const pthread_attr_t *attr,
struct sched_param *param)
{
memcpy (param, &attr->schedparam, sizeof (struct sched_param));
return 0;
}
int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
{
if (policy != SCHED_OTHER && policy != SCHED_FIFO && policy != SCHED_RR)
return EINVAL;
attr->schedpolicy = policy;
return 0;
}
int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy)
{
*policy = attr->schedpolicy;
return 0;
}
int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit)
{
if (inherit != PTHREAD_INHERIT_SCHED && inherit != PTHREAD_EXPLICIT_SCHED)
return EINVAL;
attr->inheritsched = inherit;
return 0;
}
int pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit)
{
*inherit = attr->inheritsched;
return 0;
}
int pthread_attr_setscope(pthread_attr_t *attr, int scope)
{
switch (scope) {
case PTHREAD_SCOPE_SYSTEM:
attr->scope = scope;
return 0;
case PTHREAD_SCOPE_PROCESS:
return ENOTSUP;
default:
return EINVAL;
}
}
int pthread_attr_getscope(const pthread_attr_t *attr, int *scope)
{
*scope = attr->scope;
return 0;
}
int __pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize)
{
size_t ps = __getpagesize ();
/* First round up the guard size. */
guardsize = roundup (guardsize, ps);
/* The current implementation of LinuxThreads allocates 2MB stack space
for each thread. So the maximum guardsize is 2MB - pagesize. */
if (guardsize >= STACK_SIZE - ps)
return EINVAL;
attr->guardsize = guardsize;
return 0;
}
weak_alias (__pthread_attr_setguardsize, pthread_attr_setguardsize)
int __pthread_attr_getguardsize(const pthread_attr_t *attr, size_t *guardsize)
{
*guardsize = attr->guardsize;
return 0;
}
weak_alias (__pthread_attr_getguardsize, pthread_attr_getguardsize)
int __pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr)
{
attr->stackaddr = stackaddr;
attr->stackaddr_set = 1;
return 0;
}
weak_alias (__pthread_attr_setstackaddr, pthread_attr_setstackaddr)
int __pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackaddr)
{
/* XXX This function has a stupid definition. The standard specifies
no error value but what is if no stack address was set? We simply
return the value we have in the member. */
*stackaddr = attr->stackaddr;
return 0;
}
weak_alias (__pthread_attr_getstackaddr, pthread_attr_getstackaddr)
int __pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize)
{
/* We don't accept value smaller than PTHREAD_STACK_MIN. */
if (stacksize < PTHREAD_STACK_MIN)
return EINVAL;
attr->stacksize = stacksize;
return 0;
}
weak_alias (__pthread_attr_setstacksize, pthread_attr_setstacksize)
int __pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize)
{
*stacksize = attr->stacksize;
return 0;
}
weak_alias (__pthread_attr_getstacksize, pthread_attr_getstacksize)
|
