1 /* $NetBSD: heim_threads.h,v 1.4 2023/06/19 21:41:41 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2003-2016 Kungliga Tekniska Hgskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 /* Id */ 37 38 /* 39 * Provide wrapper macros for thread synchronization primitives so we 40 * can use native thread functions for those operating system that 41 * supports it. 42 * 43 * This is so libkrb5.so (or more importantly, libgssapi.so) can have 44 * thread support while the program that that dlopen(3)s the library 45 * don't need to be linked to libpthread. 46 */ 47 48 #ifndef HEIM_THREADS_H 49 #define HEIM_THREADS_H 1 50 51 #ifdef _MSC_VER 52 53 #define HEIMDAL_THREAD_LOCAL __declspec(thread) 54 55 #else 56 57 #if defined(__clang__) || defined(__GNUC__) || defined(__SUNPRO_C) || defined(__lint__) 58 #define HEIMDAL_THREAD_LOCAL __thread 59 #else 60 #error "thread-local attribute not defined for your compiler" 61 #endif /* clang or gcc */ 62 63 #endif /* _MSC_VER */ 64 65 /* For testing the for-Windows implementation of thread keys on non-Windows */ 66 typedef unsigned long HEIM_PRIV_thread_key; 67 68 69 /* assume headers already included */ 70 71 #if defined(__NetBSD__) && __NetBSD_Version__ >= 106120000 && __NetBSD_Version__< 299001200 && defined(ENABLE_PTHREAD_SUPPORT) 72 73 /* 74 * NetBSD have a thread lib that we can use that part of libc that 75 * works regardless if application are linked to pthreads or not. 76 * NetBSD newer then 2.99.11 just use pthread.h, and the same thing 77 * will happen. 78 */ 79 #include <threadlib.h> 80 81 #define HEIMDAL_MUTEX mutex_t 82 #define HEIMDAL_MUTEX_INITIALIZER MUTEX_INITIALIZER 83 #define HEIMDAL_MUTEX_init(m) mutex_init(m, NULL) 84 #define HEIMDAL_MUTEX_lock(m) mutex_lock(m) 85 #define HEIMDAL_MUTEX_unlock(m) mutex_unlock(m) 86 #define HEIMDAL_MUTEX_destroy(m) mutex_destroy(m) 87 88 #define HEIMDAL_RWLOCK rwlock_t 89 #define HEIMDAL_RWLOCK_INITIALIZER RWLOCK_INITIALIZER 90 #define HEIMDAL_RWLOCK_init(l) rwlock_init(l, NULL) 91 #define HEIMDAL_RWLOCK_rdlock(l) rwlock_rdlock(l) 92 #define HEIMDAL_RWLOCK_wrlock(l) rwlock_wrlock(l) 93 #define HEIMDAL_RWLOCK_tryrdlock(l) rwlock_tryrdlock(l) 94 #define HEIMDAL_RWLOCK_trywrlock(l) rwlock_trywrlock(l) 95 #define HEIMDAL_RWLOCK_unlock(l) rwlock_unlock(l) 96 #define HEIMDAL_RWLOCK_destroy(l) rwlock_destroy(l) 97 98 #define HEIMDAL_thread_key thread_key_t 99 #define HEIMDAL_key_create(k,d,r) do { r = thr_keycreate(k,d); } while(0) 100 #define HEIMDAL_setspecific(k,s,r) do { r = thr_setspecific(k,s); } while(0) 101 #define HEIMDAL_getspecific(k) thr_getspecific(k) 102 #define HEIMDAL_key_delete(k) thr_keydelete(k) 103 104 #define HEIMDAL_THREAD_ID thr_t 105 #define HEIMDAL_THREAD_create(t,f,a) thr_create((t), 0, (f), (a)) 106 107 #elif defined(ENABLE_PTHREAD_SUPPORT) && (!defined(__NetBSD__) || __NetBSD_Version__ >= 299001200) 108 109 #include <pthread.h> 110 111 #define HEIMDAL_MUTEX pthread_mutex_t 112 #define HEIMDAL_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER 113 #define HEIMDAL_MUTEX_init(m) pthread_mutex_init(m, NULL) 114 #define HEIMDAL_MUTEX_lock(m) pthread_mutex_lock(m) 115 #define HEIMDAL_MUTEX_unlock(m) pthread_mutex_unlock(m) 116 #define HEIMDAL_MUTEX_destroy(m) pthread_mutex_destroy(m) 117 118 #define HEIMDAL_RWLOCK pthread_rwlock_t 119 #define HEIMDAL_RWLOCK_INITIALIZER PTHREAD_RWLOCK_INITIALIZER 120 #define HEIMDAL_RWLOCK_init(l) pthread_rwlock_init(l, NULL) 121 #define HEIMDAL_RWLOCK_rdlock(l) pthread_rwlock_rdlock(l) 122 #define HEIMDAL_RWLOCK_wrlock(l) pthread_rwlock_wrlock(l) 123 #define HEIMDAL_RWLOCK_tryrdlock(l) pthread_rwlock_tryrdlock(l) 124 #define HEIMDAL_RWLOCK_trywrlock(l) pthread_rwlock_trywrlock(l) 125 #define HEIMDAL_RWLOCK_unlock(l) pthread_rwlock_unlock(l) 126 #define HEIMDAL_RWLOCK_destroy(l) pthread_rwlock_destroy(l) 127 128 #ifdef HEIM_BASE_MAINTAINER 129 #define HEIMDAL_thread_key unsigned long 130 #define HEIM_PRIV_thread_key HEIMDAL_thread_key 131 #define HEIMDAL_key_create(k,d,r) do { r = heim_w32_key_create(k,d); } while(0) 132 #define HEIMDAL_setspecific(k,s,r) do { r = heim_w32_setspecific(k,s); } while(0) 133 #define HEIMDAL_getspecific(k) (heim_w32_getspecific(k)) 134 #define HEIMDAL_key_delete(k) (heim_w32_delete_key(k)) 135 #else 136 #define HEIMDAL_thread_key pthread_key_t 137 #define HEIMDAL_key_create(k,d,r) do { r = pthread_key_create(k,d); } while(0) 138 #define HEIMDAL_setspecific(k,s,r) do { r = pthread_setspecific(k,s); } while(0) 139 #define HEIMDAL_getspecific(k) pthread_getspecific(k) 140 #define HEIMDAL_key_delete(k) pthread_key_delete(k) 141 #endif 142 143 #define HEIMDAL_THREAD_ID pthread_t 144 #define HEIMDAL_THREAD_create(t,f,a) pthread_create((t), 0, (f), (a)) 145 146 #elif defined(_WIN32) 147 148 typedef struct heim_mutex { 149 HANDLE h; 150 } heim_mutex_t; 151 152 static inline int 153 heim_mutex_init(heim_mutex_t *m) 154 { 155 m->h = CreateSemaphore(NULL, 1, 1, NULL); 156 if (m->h == INVALID_HANDLE_VALUE) 157 return EAGAIN; 158 return 0; 159 } 160 161 static inline int 162 heim_mutex_lock(heim_mutex_t *m) 163 { 164 HANDLE h, new_h; 165 int created = 0; 166 167 h = InterlockedCompareExchangePointer(&m->h, m->h, m->h); 168 if (h == INVALID_HANDLE_VALUE || h == NULL) { 169 created = 1; 170 new_h = CreateSemaphore(NULL, 0, 1, NULL); 171 if (new_h == INVALID_HANDLE_VALUE) 172 return EAGAIN; 173 if (InterlockedCompareExchangePointer(&m->h, new_h, h) != h) { 174 created = 0; 175 CloseHandle(new_h); 176 } 177 } 178 if (!created) 179 WaitForSingleObject(m->h, INFINITE); 180 return 0; 181 } 182 183 static inline int 184 heim_mutex_unlock(heim_mutex_t *m) 185 { 186 if (ReleaseSemaphore(m->h, 1, NULL) == FALSE) 187 return EPERM; 188 return 0; 189 } 190 191 static inline int 192 heim_mutex_destroy(heim_mutex_t *m) 193 { 194 HANDLE h; 195 196 h = InterlockedCompareExchangePointer(&m->h, INVALID_HANDLE_VALUE, m->h); 197 if (h != INVALID_HANDLE_VALUE) 198 CloseHandle(h); 199 return 0; 200 } 201 202 #define HEIMDAL_MUTEX heim_mutex_t 203 #define HEIMDAL_MUTEX_INITIALIZER { INVALID_HANDLE_VALUE } 204 #define HEIMDAL_MUTEX_init(m) heim_mutex_init((m)) 205 #define HEIMDAL_MUTEX_lock(m) heim_mutex_lock((m)) 206 #define HEIMDAL_MUTEX_unlock(m) heim_mutex_unlock((m)) 207 #define HEIMDAL_MUTEX_destroy(m) heim_mutex_destroy((m)) 208 209 typedef struct heim_rwlock { 210 SRWLOCK lock; 211 int exclusive; 212 } heim_rwlock_t; 213 214 static inline int 215 heim_rwlock_init(heim_rwlock_t *l) 216 { 217 InitializeSRWLock(&l->lock); 218 l->exclusive = 0; 219 return 0; 220 } 221 222 static inline int 223 heim_rwlock_rdlock(heim_rwlock_t *l) 224 { 225 AcquireSRWLockShared(&l->lock); 226 return 0; 227 } 228 229 static inline int 230 heim_rwlock_wrlock(heim_rwlock_t *l) 231 { 232 AcquireSRWLockExclusive(&l->lock); 233 l->exclusive = 1; 234 return 0; 235 } 236 237 static inline int 238 heim_rwlock_tryrdlock(heim_rwlock_t *l) 239 { 240 if (TryAcquireSRWLockShared(&l->lock)) 241 return 0; 242 return EBUSY; 243 } 244 245 static inline int 246 heim_rwlock_trywrlock(heim_rwlock_t *l) 247 { 248 if (TryAcquireSRWLockExclusive(&l->lock)) 249 return 0; 250 return EBUSY; 251 } 252 253 static inline int 254 heim_rwlock_unlock(heim_rwlock_t *l) 255 { 256 if (l->exclusive) { 257 l->exclusive = 0; 258 ReleaseSRWLockExclusive(&(l)->lock); 259 } else { 260 ReleaseSRWLockShared(&(l)->lock); 261 } 262 return 0; 263 } 264 265 static inline int 266 heim_rwlock_destroy(heim_rwlock_t *l) 267 { 268 /* SRW locks cannot be destroyed so re-initialize */ 269 InitializeSRWLock(&l->lock); 270 l->exclusive = 0; 271 return 0; 272 } 273 274 #define HEIMDAL_RWLOCK heim_rwlock_t 275 #define HEIMDAL_RWLOCK_INITIALIZER {SRWLOCK_INIT, 0} 276 #define HEIMDAL_RWLOCK_init(l) heim_rwlock_init((l)) 277 #define HEIMDAL_RWLOCK_rdlock(l) heim_rwlock_rdlock((l)) 278 #define HEIMDAL_RWLOCK_wrlock(l) heim_rwlock_wrlock((l)) 279 #define HEIMDAL_RWLOCK_tryrdlock(l) heim_rwlock_tryrdlock((l)) 280 #define HEIMDAL_RWLOCK_trywrlock(l) heim_rwlock_trywrlock((l)) 281 #define HEIMDAL_RWLOCK_unlock(l) heim_rwlock_unlock((l)) 282 #define HEIMDAL_RWLOCK_destroy(l) heim_rwlock_destroy((l)) 283 284 #define HEIMDAL_thread_key unsigned long 285 #define HEIM_PRIV_thread_key HEIMDAL_thread_key 286 #define HEIMDAL_key_create(k,d,r) do { r = heim_w32_key_create(k,d); } while(0) 287 #define HEIMDAL_setspecific(k,s,r) do { r = heim_w32_setspecific(k,s); } while(0) 288 #define HEIMDAL_getspecific(k) (heim_w32_getspecific(k)) 289 #define HEIMDAL_key_delete(k) (heim_w32_delete_key(k)) 290 291 #define HEIMDAL_THREAD_ID DWORD 292 #define HEIMDAL_THREAD_create(t,f,a) \ 293 ((CreateThread(0, 0, (f), (a), 0, (t)) == INVALID_HANDLE_VALUE) ? EINVAL : 0) 294 295 #elif defined(HEIMDAL_DEBUG_THREADS) 296 297 /* no threads support, just do consistency checks */ 298 #include <stdlib.h> 299 300 #define HEIMDAL_MUTEX int 301 #define HEIMDAL_MUTEX_INITIALIZER 0 302 #define HEIMDAL_MUTEX_init(m) do { (*(m)) = 0; } while(0) 303 #define HEIMDAL_MUTEX_lock(m) do { if ((*(m))++ != 0) abort(); } while(0) 304 #define HEIMDAL_MUTEX_unlock(m) do { if ((*(m))-- != 1) abort(); } while(0) 305 #define HEIMDAL_MUTEX_destroy(m) do {if ((*(m)) != 0) abort(); } while(0) 306 307 #define HEIMDAL_RWLOCK rwlock_t int 308 #define HEIMDAL_RWLOCK_INITIALIZER 0 309 #define HEIMDAL_RWLOCK_init(l) do { } while(0) 310 #define HEIMDAL_RWLOCK_rdlock(l) do { } while(0) 311 #define HEIMDAL_RWLOCK_wrlock(l) do { } while(0) 312 #define HEIMDAL_RWLOCK_tryrdlock(l) do { } while(0) 313 #define HEIMDAL_RWLOCK_trywrlock(l) do { } while(0) 314 #define HEIMDAL_RWLOCK_unlock(l) do { } while(0) 315 #define HEIMDAL_RWLOCK_destroy(l) do { } while(0) 316 317 #define HEIMDAL_internal_thread_key 1 318 319 #define HEIMDAL_THREAD_ID int 320 #define HEIMDAL_THREAD_create(t,f,a) abort() 321 322 #else /* no thread support, no debug case */ 323 324 #define HEIMDAL_MUTEX int 325 #define HEIMDAL_MUTEX_INITIALIZER 0 326 #define HEIMDAL_MUTEX_init(m) do { (void)(m); } while(0) 327 #define HEIMDAL_MUTEX_lock(m) do { (void)(m); } while(0) 328 #define HEIMDAL_MUTEX_unlock(m) do { (void)(m); } while(0) 329 #define HEIMDAL_MUTEX_destroy(m) do { (void)(m); } while(0) 330 331 #define HEIMDAL_RWLOCK rwlock_t int 332 #define HEIMDAL_RWLOCK_INITIALIZER 0 333 #define HEIMDAL_RWLOCK_init(l) do { } while(0) 334 #define HEIMDAL_RWLOCK_rdlock(l) do { } while(0) 335 #define HEIMDAL_RWLOCK_wrlock(l) do { } while(0) 336 #define HEIMDAL_RWLOCK_tryrdlock(l) do { } while(0) 337 #define HEIMDAL_RWLOCK_trywrlock(l) do { } while(0) 338 #define HEIMDAL_RWLOCK_unlock(l) do { } while(0) 339 #define HEIMDAL_RWLOCK_destroy(l) do { } while(0) 340 341 #define HEIMDAL_THREAD_ID int 342 #define HEIMDAL_THREAD_create(t,f,a) abort() 343 344 #define HEIMDAL_internal_thread_key 1 345 346 #endif /* no thread support */ 347 348 #ifdef HEIMDAL_internal_thread_key 349 350 typedef struct heim_thread_key { 351 void *value; 352 void (*destructor)(void *); 353 } heim_thread_key; 354 355 #define HEIMDAL_thread_key heim_thread_key 356 #define HEIMDAL_key_create(k,d,r) \ 357 do { (k)->value = NULL; (k)->destructor = (d); r = 0; } while(0) 358 #define HEIMDAL_setspecific(k,s,r) do { (k).value = s ; r = 0; } while(0) 359 #define HEIMDAL_getspecific(k) ((k).value) 360 #define HEIMDAL_key_delete(k) do { (*(k).destructor)((k).value); } while(0) 361 362 #undef HEIMDAL_internal_thread_key 363 #endif /* HEIMDAL_internal_thread_key */ 364 365 int heim_w32_key_create(HEIM_PRIV_thread_key *, void (*)(void *)); 366 int heim_w32_delete_key(HEIM_PRIV_thread_key); 367 int heim_w32_setspecific(HEIM_PRIV_thread_key, void *); 368 void *heim_w32_getspecific(HEIM_PRIV_thread_key); 369 370 #endif /* HEIM_THREADS_H */ 371
Indexes created Sat Feb 28 05:31:39 UTC 2026