libc: Implement properly pthread_equal() stub.
[dragonfly.git] / lib / libc / gen / _pthread_stubs.c
1 /*
2  * Copyright (c) 2001 Daniel Eischen <deischen@FreeBSD.org>.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS''
15  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD: src/lib/libc/gen/_pthread_stubs.c,v 1.5 2001/06/11 23:18:22 iedowse Exp $
27  */
28
29 #include <sys/cdefs.h>
30 #include <stdlib.h>
31 #include <pthread.h>
32
33 /*
34  * Weak symbols: All libc internal usage of these functions should
35  * use the weak symbol versions (_pthread_XXX).  If libpthread is
36  * linked, it will override these functions with (non-weak) routines.
37  * The _pthread_XXX functions are provided solely for internal libc
38  * usage to avoid unwanted cancellation points and to differentiate
39  * between application locks and libc locks (threads holding the
40  * latter can't be allowed to exit/terminate).
41  */
42
43 #define WRlc(f, n)                      \
44     __weak_reference_asm(f, _ ## n);
45 #define WR(f, n)                        \
46     __weak_reference_asm(f, _ ## n);    \
47     __weak_reference_asm(f, n)
48
49 /* XXX this needs something more clever, should not some of these return errors? */
50 WR(__atfork, pthread_atfork);
51 WR(stub_zero, pthread_attr_destroy);
52 WR(stub_zero, pthread_attr_get_np);
53 WR(stub_zero, pthread_attr_getaffinity_np);
54 WR(stub_zero, pthread_attr_getdetachstate);
55 WR(stub_zero, pthread_attr_getguardsize);
56 WR(stub_zero, pthread_attr_getinheritsched);
57 WR(stub_zero, pthread_attr_getschedparam);
58 WR(stub_zero, pthread_attr_getschedpolicy);
59 WR(stub_zero, pthread_attr_getscope);
60 WR(stub_zero, pthread_attr_getstack);
61 WR(stub_zero, pthread_attr_getstackaddr);
62 WR(stub_zero, pthread_attr_getstacksize);
63 WR(stub_zero, pthread_attr_init);
64 WR(stub_zero, pthread_attr_setaffinity_np);
65 WR(stub_zero, pthread_attr_setcreatesuspend_np);
66 WR(stub_zero, pthread_attr_setdetachstate);
67 WR(stub_zero, pthread_attr_setguardsize);
68 WR(stub_zero, pthread_attr_setinheritsched);
69 WR(stub_zero, pthread_attr_setschedparam);
70 WR(stub_zero, pthread_attr_setschedpolicy);
71 WR(stub_zero, pthread_attr_setscope);
72 WR(stub_zero, pthread_attr_setstack);
73 WR(stub_zero, pthread_attr_setstackaddr);
74 WR(stub_zero, pthread_attr_setstacksize);
75 WR(stub_zero, pthread_barrier_destroy);
76 WR(stub_zero, pthread_barrier_init);
77 WR(stub_zero, pthread_barrier_wait);
78 WR(stub_zero, pthread_barrierattr_destroy);
79 WR(stub_zero, pthread_barrierattr_getpshared);
80 WR(stub_zero, pthread_barrierattr_init);
81 WR(stub_zero, pthread_barrierattr_setpshared);
82 WRlc(stub_zero, pthread_cancel);
83 WR(stub_zero, pthread_cleanup_pop);
84 WR(stub_zero, pthread_cleanup_push);
85 WR(stub_zero, pthread_cond_broadcast);
86 WR(stub_zero, pthread_cond_destroy);
87 WR(stub_zero, pthread_cond_init);
88 WR(stub_zero, pthread_cond_signal);
89 WR(stub_zero, pthread_cond_timedwait);
90 WR(stub_zero, pthread_cond_wait);
91 WR(stub_zero, pthread_condattr_destroy);
92 WR(stub_zero, pthread_condattr_getclock);
93 WR(stub_zero, pthread_condattr_getpshared);
94 WR(stub_zero, pthread_condattr_init);
95 WR(stub_zero, pthread_condattr_setclock);
96 WR(stub_zero, pthread_condattr_setpshared);
97 WR(stub_zero, pthread_detach);
98 WR(stub_equal, pthread_equal);
99 WR(stub_exit, pthread_exit);
100 WR(stub_zero, pthread_getaffinity_np);
101 WR(stub_zero, pthread_getconcurrency);
102 WR(stub_zero, pthread_getcpuclockid);
103 WR(stub_zero, pthread_getprio);
104 WR(stub_zero, pthread_getschedparam);
105 WR(stub_null, pthread_getspecific);
106 WR(stub_zero, pthread_getthreadid_np);
107 WR(stub_empty, pthread_init_early);
108 WR(stub_zero, pthread_join);
109 WR(stub_zero, pthread_key_create);
110 WR(stub_zero, pthread_key_delete);
111 WR(stub_zero, pthread_kill);
112 WR(stub_main, pthread_main_np);
113 WR(stub_zero, pthread_multi_np);
114 WR(stub_zero, pthread_mutex_destroy);
115 WR(stub_zero, pthread_mutex_getprioceiling);
116 WR(stub_zero, pthread_mutex_init);
117 WR(stub_zero, pthread_mutex_lock);
118 WR(stub_zero, pthread_mutex_setprioceiling);
119 WR(stub_zero, pthread_mutex_timedlock);
120 WR(stub_zero, pthread_mutex_trylock);
121 WR(stub_zero, pthread_mutex_unlock);
122 WR(stub_zero, pthread_mutexattr_destroy);
123 WR(stub_zero, pthread_mutexattr_getkind_np);
124 WR(stub_zero, pthread_mutexattr_getprioceiling);
125 WR(stub_zero, pthread_mutexattr_getprotocol);
126 WR(stub_zero, pthread_mutexattr_getpshared);
127 WR(stub_zero, pthread_mutexattr_gettype);
128 WR(stub_zero, pthread_mutexattr_init);
129 WR(stub_zero, pthread_mutexattr_setkind_np);
130 WR(stub_zero, pthread_mutexattr_setprioceiling);
131 WR(stub_zero, pthread_mutexattr_setprotocol);
132 WR(stub_zero, pthread_mutexattr_setpshared);
133 WR(stub_zero, pthread_mutexattr_settype);
134 WR(stub_once, pthread_once);
135 WR(stub_zero, pthread_resume_all_np);
136 WR(stub_zero, pthread_resume_np);
137 WR(stub_zero, pthread_rwlock_destroy);
138 WR(stub_zero, pthread_rwlock_init);
139 WR(stub_zero, pthread_rwlock_rdlock);
140 WR(stub_zero, pthread_rwlock_timedrdlock);
141 WR(stub_zero, pthread_rwlock_timedwrlock);
142 WR(stub_zero, pthread_rwlock_tryrdlock);
143 WR(stub_zero, pthread_rwlock_trywrlock);
144 WR(stub_zero, pthread_rwlock_unlock);
145 WR(stub_zero, pthread_rwlock_wrlock);
146 WR(stub_zero, pthread_rwlockattr_destroy);
147 WR(stub_zero, pthread_rwlockattr_getpshared);
148 WR(stub_zero, pthread_rwlockattr_init);
149 WR(stub_zero, pthread_rwlockattr_setpshared);
150 WR(stub_self, pthread_self);
151 WR(stub_zero, pthread_set_name_np);
152 WR(stub_zero, pthread_setaffinity_np);
153 WR(stub_zero, pthread_setcancelstate);
154 WR(stub_zero, pthread_setcanceltype);
155 WR(stub_zero, pthread_setconcurrency);
156 WR(stub_zero, pthread_setprio);
157 WR(stub_zero, pthread_setschedparam);
158 WR(stub_zero, pthread_setspecific);
159 WR(stub_zero, pthread_sigmask);
160 WR(stub_zero, pthread_single_np);
161 WR(stub_zero, pthread_spin_destroy);
162 WR(stub_zero, pthread_spin_init);
163 WR(stub_zero, pthread_spin_lock);
164 WR(stub_zero, pthread_spin_trylock);
165 WR(stub_zero, pthread_spin_unlock);
166 WR(stub_zero, pthread_suspend_all_np);
167 WR(stub_zero, pthread_suspend_np);
168 WR(stub_zero, pthread_switch_add_np);
169 WR(stub_zero, pthread_switch_delete_np);
170 WR(stub_zero, pthread_testcancel);
171 WR(stub_zero, pthread_timedjoin_np);
172 WR(stub_zero, pthread_yield);
173 WR(stub_zero, sem_close);
174 WR(stub_zero, sem_destroy);
175 WR(stub_zero, sem_getvalue);
176 WR(stub_zero, sem_init);
177 WR(stub_zero, sem_open);
178 WR(stub_zero, sem_post);
179 WR(stub_zero, sem_trywait);
180 WR(stub_zero, sem_timedwait);
181 WR(stub_zero, sem_unlink);
182 WR(stub_zero, sem_wait);
183
184
185 static int __used
186 stub_zero(void)
187 {
188         return (0);
189 }
190
191 static int __used
192 stub_once(pthread_once_t *o, void (*r)(void))
193 {
194         if (o->state != PTHREAD_DONE_INIT) {
195                 (*r)();
196                 o->state = PTHREAD_DONE_INIT;
197         }
198
199         return (0);
200 }
201
202 static void * __used
203 stub_null(void)
204 {
205         return (NULL);
206 }
207
208 static void * __used
209 stub_self(void)
210 {
211         static struct {} main_thread;
212
213         return (&main_thread);
214 }
215
216 static int __used
217 stub_main(void)
218 {
219         return (-1);
220 }
221
222 static int __used
223 stub_equal(pthread_t a, pthread_t b)
224 {
225         return (a == b);
226 }
227
228 static void __used
229 stub_empty(void)
230 {
231 }
232
233 static void __used
234 stub_exit(void)
235 {
236         exit(0);
237 }
238
239 /*
240  * If libpthread is loaded, make sure it is initialised before
241  * other libraries call pthread functions
242  */
243 void _pthread_init(void) __constructor(101);
244 void _pthread_init_early(void);
245 void
246 _pthread_init(void)
247 {
248         _pthread_init_early();
249 }
250
251 extern void (*cb_prepare)(void);
252 extern void (*cb_parent)(void);
253 extern void (*cb_child)(void);
254 extern int __isthreaded;
255
256 static int __used
257 __atfork(void (*prepare)(void), void (*parent)(void),
258     void (*child)(void))
259 {
260         if (__isthreaded)
261                 return (-1);
262         cb_prepare = prepare;
263         cb_parent = parent;
264         cb_child = child;
265         return (0);
266 }