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