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  * $DragonFly: src/lib/libc/gen/_pthread_stubs.c,v 1.4 2005/05/09 12:43:40 davidxu Exp $
  28  */
  29
  30 #include <signal.h>
  31 #include <pthread.h>
  32 #include <pthread_np.h>
  33
  34 int     _pthread_cond_init_stub(pthread_cond_t *, const pthread_condattr_t *);
  35 int     _pthread_cond_signal_stub(pthread_cond_t *);
  36 int     _pthread_cond_wait_stub(pthread_cond_t *, pthread_mutex_t *);
  37 void    *_pthread_getspecific_stub(pthread_key_t);
  38 int     _pthread_key_create_stub(pthread_key_t *, void (*)(void *));
  39 int     _pthread_key_delete_stub(pthread_key_t);
  40 int     _pthread_main_np_stub(void);
  41 int     _pthread_mutex_destroy_stub(pthread_mutex_t *);
  42 int     _pthread_mutex_init_stub(pthread_mutex_t *,
  43                                  const pthread_mutexattr_t *);
  44 int     _pthread_mutex_lock_stub(pthread_mutex_t *);
  45 int     _pthread_mutex_trylock_stub(pthread_mutex_t *);
  46 int     _pthread_mutex_unlock_stub(pthread_mutex_t *);
  47 int     _pthread_mutexattr_init_stub(pthread_mutexattr_t *);
  48 int     _pthread_mutexattr_destroy_stub(pthread_mutexattr_t *);
  49 int     _pthread_mutexattr_settype_stub(pthread_mutexattr_t *, int);
  50 int     _pthread_once_stub(pthread_once_t *, void (*)(void));
  51 int     _pthread_rwlock_init_stub(pthread_rwlock_t *,
  52                                   const pthread_rwlockattr_t *);
  53 int     _pthread_rwlock_destroy_stub(pthread_rwlock_t *);
  54 int     _pthread_rwlock_rdlock_stub(pthread_rwlock_t *);
  55 int     _pthread_rwlock_tryrdlock_stub(pthread_rwlock_t *);
  56 int     _pthread_rwlock_trywrlock_stub(pthread_rwlock_t *);
  57 int     _pthread_rwlock_unlock_stub(pthread_rwlock_t *);
  58 int     _pthread_rwlock_wrlock_stub(pthread_rwlock_t *);
  59 int     _pthread_setspecific_stub(pthread_key_t, const void *);
  60 int     _pthread_sigmask_stub(int, const sigset_t *, sigset_t *);
  61
  62 /* define a null pthread structure just to satisfy _pthread_self */
  63 struct pthread {
  64 };
  65
  66 static struct pthread main_thread;
  67
  68 /*
  69  * Weak symbols: All libc internal usage of these functions should
  70  * use the weak symbol versions (_pthread_XXX).  If libpthread is
  71  * linked, it will override these functions with (non-weak) routines.
  72  * The _pthread_XXX functions are provided solely for internal libc
  73  * usage to avoid unwanted cancellation points and to differentiate
  74  * between application locks and libc locks (threads holding the
  75  * latter can't be allowed to exit/terminate).
  76  */
  77 __weak_reference(_pthread_cond_init_stub,       _pthread_cond_init);
  78 __weak_reference(_pthread_cond_signal_stub,     _pthread_cond_signal);
  79 __weak_reference(_pthread_cond_wait_stub,       _pthread_cond_wait);
  80 __weak_reference(_pthread_getspecific_stub,     _pthread_getspecific);
  81 __weak_reference(_pthread_key_create_stub,      _pthread_key_create);
  82 __weak_reference(_pthread_key_delete_stub,      _pthread_key_delete);
  83 __weak_reference(_pthread_main_np_stub,         _pthread_main_np);
  84 __weak_reference(_pthread_mutex_destroy_stub,   _pthread_mutex_destroy);
  85 __weak_reference(_pthread_mutex_init_stub,      _pthread_mutex_init);
  86 __weak_reference(_pthread_mutex_lock_stub,      _pthread_mutex_lock);
  87 __weak_reference(_pthread_mutex_trylock_stub,   _pthread_mutex_trylock);
  88 __weak_reference(_pthread_mutex_unlock_stub,    _pthread_mutex_unlock);
  89 __weak_reference(_pthread_mutexattr_init_stub,  _pthread_mutexattr_init);
  90 __weak_reference(_pthread_mutexattr_destroy_stub, _pthread_mutexattr_destroy);
  91 __weak_reference(_pthread_mutexattr_settype_stub, _pthread_mutexattr_settype);
  92 __weak_reference(_pthread_once_stub,            _pthread_once);
  93 __weak_reference(_pthread_self_stub,            _pthread_self);
  94 __weak_reference(_pthread_rwlock_init_stub,     _pthread_rwlock_init);
  95 __weak_reference(_pthread_rwlock_rdlock_stub,   _pthread_rwlock_rdlock);
  96 __weak_reference(_pthread_rwlock_tryrdlock_stub, _pthread_rwlock_tryrdlock);
  97 __weak_reference(_pthread_rwlock_trywrlock_stub, _pthread_rwlock_trywrlock);
  98 __weak_reference(_pthread_rwlock_unlock_stub,   _pthread_rwlock_unlock);
  99 __weak_reference(_pthread_rwlock_wrlock_stub,   _pthread_rwlock_wrlock);
 100 __weak_reference(_pthread_setspecific_stub,     _pthread_setspecific);
 101 __weak_reference(_pthread_sigmask_stub,         _pthread_sigmask);
 102
 103 int
 104 _pthread_cond_init_stub(pthread_cond_t *cond __unused,
 105                         const pthread_condattr_t *cond_attr __unused)
 106 {
 107         return (0);
 108 }
 109
 110 int
 111 _pthread_cond_signal_stub(pthread_cond_t *cond __unused)
 112 {
 113         return (0);
 114 }
 115
 116 int
 117 _pthread_cond_wait_stub(pthread_cond_t *cond __unused,
 118                         pthread_mutex_t *mutex __unused)
 119 {
 120         return (0);
 121 }
 122
 123 void *
 124 _pthread_getspecific_stub(pthread_key_t key __unused)
 125 {
 126         return (NULL);
 127 }
 128
 129 int
 130 _pthread_key_create_stub(pthread_key_t *key __unused,
 131                          void (*destructor) (void *) __unused)
 132 {
 133         return (0);
 134 }
 135
 136 int
 137 _pthread_key_delete_stub(pthread_key_t key __unused)
 138 {
 139         return (0);
 140 }
 141
 142 int
 143 _pthread_main_np_stub(void)
 144 {
 145         return (-1);
 146 }
 147
 148 int
 149 _pthread_mutex_destroy_stub(pthread_mutex_t *mattr __unused)
 150 {
 151         return (0);
 152 }
 153
 154 int
 155 _pthread_mutex_init_stub(pthread_mutex_t *mutex __unused,
 156                          const pthread_mutexattr_t *mattr __unused)
 157 {
 158         return (0);
 159 }
 160
 161 int
 162 _pthread_mutex_lock_stub(pthread_mutex_t *mutex __unused)
 163 {
 164         return (0);
 165 }
 166
 167 int
 168 _pthread_mutex_trylock_stub(pthread_mutex_t *mutex __unused)
 169 {
 170         return (0);
 171 }
 172
 173 int
 174 _pthread_mutex_unlock_stub(pthread_mutex_t *mutex __unused)
 175 {
 176         return (0);
 177 }
 178
 179 int
 180 _pthread_mutexattr_init_stub(pthread_mutexattr_t *mattr __unused)
 181 {
 182         return (0);
 183 }
 184
 185 int
 186 _pthread_mutexattr_destroy_stub(pthread_mutexattr_t *mattr __unused)
 187 {
 188         return (0);
 189 }
 190
 191 int
 192 _pthread_mutexattr_settype_stub(pthread_mutexattr_t *mattr __unused,
 193                                 int type __unused)
 194 {
 195         return (0);
 196 }
 197
 198 int
 199 _pthread_once_stub(pthread_once_t *once_control __unused,
 200                    void (*init_routine) (void) __unused)
 201 {
 202         return (0);
 203 }
 204
 205 int
 206 _pthread_rwlock_init_stub(pthread_rwlock_t *rwlock __unused,
 207                           const pthread_rwlockattr_t *attr __unused)
 208 {
 209         return (0);
 210 }
 211
 212 int
 213 _pthread_rwlock_destroy_stub(pthread_rwlock_t *rwlock __unused)
 214 {
 215         return (0);
 216 }
 217
 218 int
 219 _pthread_rwlock_rdlock_stub(pthread_rwlock_t *rwlock __unused)
 220 {
 221         return (0);
 222 }
 223
 224 int
 225 _pthread_rwlock_tryrdlock_stub(pthread_rwlock_t *rwlock __unused)
 226 {
 227         return (0);
 228 }
 229
 230 int
 231 _pthread_rwlock_trywrlock_stub(pthread_rwlock_t *rwlock __unused)
 232 {
 233         return (0);
 234 }
 235
 236 int
 237 _pthread_rwlock_unlock_stub(pthread_rwlock_t *rwlock __unused)
 238 {
 239         return (0);
 240 }
 241
 242 int
 243 _pthread_rwlock_wrlock_stub(pthread_rwlock_t *rwlock __unused)
 244 {
 245         return (0);
 246 }
 247
 248 pthread_t
 249 _pthread_self_stub(void)
 250 {
 251         return (&main_thread);
 252 }
 253 int
 254 _pthread_setspecific_stub(pthread_key_t key __unused,
 255                           const void *value __unused)
 256 {
 257         return (0);
 258 }
 259
 260 int
 261 _pthread_sigmask_stub(int how __unused, const sigset_t *set __unused,
 262                       sigset_t *oset __unused)
 263 {
 264         return (0);
 265 }