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
|
/* Creating and controlling POSIX threads.
Copyright (C) 2010-2024 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Paul Eggert, 2010, and Bruno Haible <bruno@clisp.org>, 2019. */
#include <config.h>
/* Specification. */
#include <pthread.h>
#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
# include "windows-thread.h"
#else
# include <stdlib.h>
#endif
typedef void * (* pthread_main_function_t) (void *);
#if ((defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS) || !HAVE_PTHREAD_H
int
pthread_attr_init (pthread_attr_t *attr)
{
*attr = PTHREAD_CREATE_JOINABLE;
return 0;
}
int
pthread_attr_getdetachstate (const pthread_attr_t *attr, int *detachstatep)
{
*detachstatep = *attr & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED);
return 0;
}
int
pthread_attr_setdetachstate (pthread_attr_t *attr, int detachstate)
{
if (!(detachstate == PTHREAD_CREATE_JOINABLE
|| detachstate == PTHREAD_CREATE_DETACHED))
return EINVAL;
*attr ^= (*attr ^ detachstate)
& (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED);
return 0;
}
int
pthread_attr_destroy (_GL_UNUSED pthread_attr_t *attr)
{
return 0;
}
#endif
#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
/* Use Windows threads. */
int
pthread_create (pthread_t *threadp, const pthread_attr_t *attr,
pthread_main_function_t mainfunc, void *arg)
{
unsigned int glwthread_attr =
(attr != NULL
&& (*attr & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED))
!= PTHREAD_CREATE_JOINABLE
? GLWTHREAD_ATTR_DETACHED
: 0);
return glwthread_thread_create (threadp, glwthread_attr, mainfunc, arg);
}
pthread_t
pthread_self (void)
{
return glwthread_thread_self ();
}
int
pthread_equal (pthread_t thread1, pthread_t thread2)
{
return thread1 == thread2;
}
int
pthread_detach (pthread_t thread)
{
return glwthread_thread_detach (thread);
}
int
pthread_join (pthread_t thread, void **valuep)
{
return glwthread_thread_join (thread, valuep);
}
void
pthread_exit (void *value)
{
glwthread_thread_exit (value);
}
#elif HAVE_PTHREAD_H
/* Provide workarounds for POSIX threads. */
# if PTHREAD_CREATE_IS_INLINE
int
pthread_create (pthread_t *threadp, const pthread_attr_t *attr,
pthread_main_function_t mainfunc, void *arg)
# undef pthread_create
{
return pthread_create (threadp, attr, mainfunc, arg);
}
int
pthread_attr_init (pthread_attr_t *attr)
# undef pthread_attr_init
{
return pthread_attr_init (attr);
}
# endif
#else
/* Provide a dummy implementation for single-threaded applications. */
int
pthread_create (pthread_t *threadp, const pthread_attr_t *attr,
pthread_main_function_t mainfunc, void *arg)
{
/* The maximum number of threads is reached. Do not create a thread. */
return EAGAIN;
}
pthread_t
pthread_self (void)
{
return 42;
}
int
pthread_equal (pthread_t thread1, pthread_t thread2)
{
return thread1 == thread2;
}
int
pthread_detach (pthread_t thread)
{
/* There are no joinable threads. */
return EINVAL;
}
int
pthread_join (pthread_t thread, void **valuep)
{
/* There are no joinable threads. */
return EINVAL;
}
void
pthread_exit (void *value)
{
/* There is just one thread, so the process exits. */
exit (0);
}
#endif
|
