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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/*
*
* Copyright (c) 1995 David E. Wexelblat. All rights reserved
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL DAVID E. WEXELBLAT BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of David E. Wexelblat shall
* not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization
* from David E. Wexelblat.
*
*/
/*
* Stubs for thread functions needed by the X library. Supports
* UnixWare 2.x threads; may support Solaris 2 threads as well, but not
* tested. Defining things this way removes the dependency of the X
* library on the threads library, but still supports threads if the user
* specificies the thread library on the link line.
*/
/*
* Modifications by Carlos A M dos Santos, XFree86 Project, November 1999.
*
* Explanation from <X11/Xos_r.h>:
* The structure below is complicated, mostly because P1003.1c (the
* IEEE POSIX Threads spec) went through lots of drafts, and some
* vendors shipped systems based on draft API that were changed later.
* Unfortunately POSIX did not provide a feature-test macro for
* distinguishing each of the drafts.
*/
#include <stdlib.h>
static int _Xthr_once_stub_(void *, void (*)(void));
static int _Xthr_key_create_stub_(unsigned int *, void (*)(void *));
static int _Xthr_setspecific_stub_(unsigned int, const void *);
static void *_Xthr_getspecific_stub_(unsigned int);
#ifdef CTHREADS
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <cthreads.h>
typedef cthread_t xthread_t;
#define xthread_self cthread_self
#pragma weak cthread_self = _Xthr_self_stub_
#define xmutex_init mutex_init
#pragma weak mutex_init = _Xthr_zero_stub_
#pragma weak mutex_clear = _Xthr_zero_stub_
#pragma weak mutex_lock = _Xthr_zero_stub_
#pragma weak mutex_unlock = _Xthr_zero_stub_
#pragma weak condition_init = _Xthr_zero_stub_
#pragma weak condition_clear = _Xthr_zero_stub_
#pragma weak condition_wait = _Xthr_zero_stub_
#pragma weak condition_signal = _Xthr_zero_stub_
#pragma weak condition_broadcast = _Xthr_zero_stub_
#else /* !CTHREADS */
#if defined(SVR4) && !defined(__sgi)
#include <thread.h>
typedef thread_t xthread_t;
#pragma weak thr_self = _Xthr_self_stub_
#pragma weak mutex_init = _Xthr_zero_stub_
#pragma weak mutex_destroy = _Xthr_zero_stub_
#pragma weak mutex_lock = _Xthr_zero_stub_
#pragma weak mutex_unlock = _Xthr_zero_stub_
#pragma weak cond_init = _Xthr_zero_stub_
#pragma weak cond_destroy = _Xthr_zero_stub_
#pragma weak cond_wait = _Xthr_zero_stub_
#pragma weak cond_signal = _Xthr_zero_stub_
#pragma weak cond_broadcast = _Xthr_zero_stub_
#else /* !SVR4 */
#ifdef WIN32
/*
* Don't know what to do here. Is there something do be done at all?
*/
#else /* !WIN32 */
#ifdef USE_TIS_SUPPORT
#include <tis.h>
typedef pthread_t xthread_t;
#pragma weak tis_self = _Xthr_self_stub_
#pragma weak tis_mutex_init = _Xthr_zero_stub_
#pragma weak tis_mutex_destroy = _Xthr_zero_stub_
#pragma weak tis_mutex_lock = _Xthr_zero_stub_
#pragma weak tis_mutex_unlock = _Xthr_zero_stub_
#pragma weak tis_cond_init = _Xthr_zero_stub_
#pragma weak tis_cond_destroy = _Xthr_zero_stub_
#pragma weak tis_cond_wait = _Xthr_zero_stub_
#pragma weak tis_cond_signal = _Xthr_zero_stub_
#pragma weak tis_cond_broadcast = _Xthr_zero_stub_
#else
#include <pthread.h>
typedef pthread_t xthread_t;
#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
xthread_t pthread_self() __attribute__ ((weak, alias ("_Xthr_self_stub_")));
int pthread_mutex_init() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
int pthread_mutex_destroy() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
int pthread_mutex_lock() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
int pthread_mutex_unlock() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
int pthread_cond_init() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
int pthread_cond_destroy() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
int pthread_cond_wait() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
int pthread_cond_signal() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
int pthread_cond_broadcast() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
int pthread_key_create() __attribute__ ((weak, alias ("_Xthr_key_create_stub_")));
void *pthread_getspecific() __attribute__ ((weak, alias ("_Xthr_getspecific_stub_")));
int pthread_setspecific() __attribute__ ((weak, alias ("_Xthr_setspecific_stub_")));
int pthread_once() __attribute__ ((weak, alias ("_Xthr_once_stub_")));
#else /* __GNUC__ */
#pragma weak pthread_self = _Xthr_self_stub_
#pragma weak pthread_mutex_init = _Xthr_zero_stub_
#pragma weak pthread_mutex_destroy = _Xthr_zero_stub_
#pragma weak pthread_mutex_lock = _Xthr_zero_stub_
#pragma weak pthread_mutex_unlock = _Xthr_zero_stub_
#pragma weak pthread_cond_init = _Xthr_zero_stub_
#pragma weak pthread_cond_destroy = _Xthr_zero_stub_
#pragma weak pthread_cond_wait = _Xthr_zero_stub_
#pragma weak pthread_cond_signal = _Xthr_zero_stub_
#pragma weak pthread_cond_broadcast = _Xthr_zero_stub_
/* These are added for libGL */
#pragma weak pthread_key_create = _Xthr_key_create_stub_
#pragma weak pthread_getspecific = _Xthr_getspecific_stub_
#pragma weak pthread_setspecific = _Xthr_setspecific_stub_
#pragam weak pthread_once = _Xthr_once_stub_
#endif /* __GNUC__ */
#if defined(_DECTHREADS_) || defined(linux)
#pragma weak pthread_equal = _Xthr_equal_stub_ /* See Xthreads.h! */
int
_Xthr_equal_stub_()
{
return(1);
}
#endif /* _DECTHREADS_ || linux */
#endif /* USE_TIS_SUPPORT */
#endif /* WIN32 */
#endif /* SVR4 */
#endif /* CTHREADS */
static xthread_t
_Xthr_self_stub_()
{
static xthread_t _X_no_thread_id;
return(_X_no_thread_id); /* defined by <X11/Xthreads.h> */
}
static int
_Xthr_zero_stub_()
{
return(0);
}
#include <errno.h>
#define XTHR_ONCE_KEYS_CHUNK 100
static void**_Xthr_once_keys_ = NULL;
static unsigned int _Xthr_once_last_key_ = 0;
static int
_Xthr_once_stub_(void *id, void (*routine)(void))
{
void **tmp;
unsigned int i;
/* look for the id */
for (i = 0; i < _Xthr_once_last_key_; i++)
if (_Xthr_once_keys_[i] == id)
return 0;
/* allocate more room if needed */
if ((_Xthr_once_last_key_ % XTHR_ONCE_KEYS_CHUNK) == 0) {
tmp = realloc(_Xthr_once_keys_,
(_Xthr_once_last_key_ + XTHR_ONCE_KEYS_CHUNK)*sizeof(void *));
if (tmp == NULL) {
return ENOMEM;
}
for (i = 0; i < XTHR_ONCE_KEYS_CHUNK; i++)
tmp[_Xthr_once_last_key_ + i] = NULL;
_Xthr_once_keys_ = tmp;
}
/* call the routine */
routine();
/* Mark it */
_Xthr_once_keys_[_Xthr_once_last_key_++] = id;
return 0;
}
#define XTHR_KEYS_CHUNK 100
static void **_Xthr_keys_ = NULL;
static unsigned int _Xthr_last_key_ = 0;
static int
_Xthr_key_create_stub_(unsigned int *key, void (*destructor)(void *))
{
void **tmp;
unsigned int i;
if ((_Xthr_last_key_ % XTHR_KEYS_CHUNK) == 0) {
tmp = realloc(_Xthr_keys_,
(_Xthr_last_key_ + XTHR_KEYS_CHUNK)*sizeof(void *));
if (tmp == NULL) {
return ENOMEM;
}
for (i = 0; i < XTHR_KEYS_CHUNK; i++)
tmp[_Xthr_last_key_ + i] = NULL;
_Xthr_keys_ = tmp;
}
*key = _Xthr_last_key_++;
return 0;
}
static int
_Xthr_setspecific_stub_(unsigned int key, const void *value)
{
if (_Xthr_last_key_ == 0 || key >= _Xthr_last_key_)
return EINVAL;
_Xthr_keys_[key] = value;
return 0;
}
static void *
_Xthr_getspecific_stub_(unsigned int key)
{
if (_Xthr_last_key_ == 0 || key >= _Xthr_last_key_)
return NULL;
return(_Xthr_keys_[key]);
}
|
