1 /* 2 * Copyright (c) 2003 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* $Id$ */ 35 36 /* 37 * Provide wrapper macros for thread synchronization primitives so we 38 * can use native thread functions for those operating system that 39 * supports it. 40 * 41 * This is so libkrb5.so (or more importantly, libgssapi.so) can have 42 * thread support while the program that that dlopen(3)s the library 43 * don't need to be linked to libpthread. 44 */ 45 46 #ifndef HEIM_THREADS_H 47 #define HEIM_THREADS_H 1 48 49 /* assume headers already included */ 50 51 #if defined(__NetBSD__) && __NetBSD_Version__ >= 106120000 && __NetBSD_Version__< 299001200 && defined(ENABLE_PTHREAD_SUPPORT) 52 53 /* 54 * NetBSD have a thread lib that we can use that part of libc that 55 * works regardless if application are linked to pthreads or not. 56 * NetBSD newer then 2.99.11 just use pthread.h, and the same thing 57 * will happen. 58 */ 59 #include <threadlib.h> 60 61 #define HEIMDAL_MUTEX mutex_t 62 #define HEIMDAL_MUTEX_INITIALIZER MUTEX_INITIALIZER 63 #define HEIMDAL_MUTEX_init(m) mutex_init(m, NULL) 64 #define HEIMDAL_MUTEX_lock(m) mutex_lock(m) 65 #define HEIMDAL_MUTEX_unlock(m) mutex_unlock(m) 66 #define HEIMDAL_MUTEX_destroy(m) mutex_destroy(m) 67 68 #define HEIMDAL_RWLOCK rwlock_t 69 #define HEIMDAL_RWLOCK_INITIALIZER RWLOCK_INITIALIZER 70 #define HEIMDAL_RWLOCK_init(l) rwlock_init(l, NULL) 71 #define HEIMDAL_RWLOCK_rdlock(l) rwlock_rdlock(l) 72 #define HEIMDAL_RWLOCK_wrlock(l) rwlock_wrlock(l) 73 #define HEIMDAL_RWLOCK_tryrdlock(l) rwlock_tryrdlock(l) 74 #define HEIMDAL_RWLOCK_trywrlock(l) rwlock_trywrlock(l) 75 #define HEIMDAL_RWLOCK_unlock(l) rwlock_unlock(l) 76 #define HEIMDAL_RWLOCK_destroy(l) rwlock_destroy(l) 77 78 #define HEIMDAL_thread_key thread_key_t 79 #define HEIMDAL_key_create(k,d,r) do { r = thr_keycreate(k,d); } while(0) 80 #define HEIMDAL_setspecific(k,s,r) do { r = thr_setspecific(k,s); } while(0) 81 #define HEIMDAL_getspecific(k) thr_getspecific(k) 82 #define HEIMDAL_key_delete(k) thr_keydelete(k) 83 84 #elif defined(ENABLE_PTHREAD_SUPPORT) && (!defined(__NetBSD__) || __NetBSD_Version__ >= 299001200) 85 86 #include <pthread.h> 87 88 #define HEIMDAL_MUTEX pthread_mutex_t 89 #define HEIMDAL_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER 90 #define HEIMDAL_MUTEX_init(m) pthread_mutex_init(m, NULL) 91 #define HEIMDAL_MUTEX_lock(m) pthread_mutex_lock(m) 92 #define HEIMDAL_MUTEX_unlock(m) pthread_mutex_unlock(m) 93 #define HEIMDAL_MUTEX_destroy(m) pthread_mutex_destroy(m) 94 95 #define HEIMDAL_RWLOCK rwlock_t 96 #define HEIMDAL_RWLOCK_INITIALIZER RWLOCK_INITIALIZER 97 #define HEIMDAL_RWLOCK_init(l) pthread_rwlock_init(l, NULL) 98 #define HEIMDAL_RWLOCK_rdlock(l) pthread_rwlock_rdlock(l) 99 #define HEIMDAL_RWLOCK_wrlock(l) pthread_rwlock_wrlock(l) 100 #define HEIMDAL_RWLOCK_tryrdlock(l) pthread_rwlock_tryrdlock(l) 101 #define HEIMDAL_RWLOCK_trywrlock(l) pthread_rwlock_trywrlock(l) 102 #define HEIMDAL_RWLOCK_unlock(l) pthread_rwlock_unlock(l) 103 #define HEIMDAL_RWLOCK_destroy(l) pthread_rwlock_destroy(l) 104 105 #define HEIMDAL_thread_key pthread_key_t 106 #define HEIMDAL_key_create(k,d,r) do { r = pthread_key_create(k,d); } while(0) 107 #define HEIMDAL_setspecific(k,s,r) do { r = pthread_setspecific(k,s); } while(0) 108 #define HEIMDAL_getspecific(k) pthread_getspecific(k) 109 #define HEIMDAL_key_delete(k) pthread_key_delete(k) 110 111 #elif defined(HEIMDAL_DEBUG_THREADS) 112 113 /* no threads support, just do consistency checks */ 114 #include <stdlib.h> 115 116 #define HEIMDAL_MUTEX int 117 #define HEIMDAL_MUTEX_INITIALIZER 0 118 #define HEIMDAL_MUTEX_init(m) do { (*(m)) = 0; } while(0) 119 #define HEIMDAL_MUTEX_lock(m) do { if ((*(m))++ != 0) abort(); } while(0) 120 #define HEIMDAL_MUTEX_unlock(m) do { if ((*(m))-- != 1) abort(); } while(0) 121 #define HEIMDAL_MUTEX_destroy(m) do {if ((*(m)) != 0) abort(); } while(0) 122 123 #define HEIMDAL_RWLOCK rwlock_t int 124 #define HEIMDAL_RWLOCK_INITIALIZER 0 125 #define HEIMDAL_RWLOCK_init(l) do { } while(0) 126 #define HEIMDAL_RWLOCK_rdlock(l) do { } while(0) 127 #define HEIMDAL_RWLOCK_wrlock(l) do { } while(0) 128 #define HEIMDAL_RWLOCK_tryrdlock(l) do { } while(0) 129 #define HEIMDAL_RWLOCK_trywrlock(l) do { } while(0) 130 #define HEIMDAL_RWLOCK_unlock(l) do { } while(0) 131 #define HEIMDAL_RWLOCK_destroy(l) do { } while(0) 132 133 #define HEIMDAL_internal_thread_key 1 134 135 #else /* no thread support, no debug case */ 136 137 #define HEIMDAL_MUTEX int 138 #define HEIMDAL_MUTEX_INITIALIZER 0 139 #define HEIMDAL_MUTEX_init(m) do { (void)(m); } while(0) 140 #define HEIMDAL_MUTEX_lock(m) do { (void)(m); } while(0) 141 #define HEIMDAL_MUTEX_unlock(m) do { (void)(m); } while(0) 142 #define HEIMDAL_MUTEX_destroy(m) do { (void)(m); } while(0) 143 144 #define HEIMDAL_RWLOCK rwlock_t int 145 #define HEIMDAL_RWLOCK_INITIALIZER 0 146 #define HEIMDAL_RWLOCK_init(l) do { } while(0) 147 #define HEIMDAL_RWLOCK_rdlock(l) do { } while(0) 148 #define HEIMDAL_RWLOCK_wrlock(l) do { } while(0) 149 #define HEIMDAL_RWLOCK_tryrdlock(l) do { } while(0) 150 #define HEIMDAL_RWLOCK_trywrlock(l) do { } while(0) 151 #define HEIMDAL_RWLOCK_unlock(l) do { } while(0) 152 #define HEIMDAL_RWLOCK_destroy(l) do { } while(0) 153 154 #define HEIMDAL_internal_thread_key 1 155 156 #endif /* no thread support */ 157 158 #ifdef HEIMDAL_internal_thread_key 159 160 typedef struct heim_thread_key { 161 void *value; 162 void (*destructor)(void *); 163 } heim_thread_key; 164 165 #define HEIMDAL_thread_key heim_thread_key 166 #define HEIMDAL_key_create(k,d,r) \ 167 do { (k)->value = NULL; (k)->destructor = (d); r = 0; } while(0) 168 #define HEIMDAL_setspecific(k,s,r) do { (k).value = s ; r = 0; } while(0) 169 #define HEIMDAL_getspecific(k) ((k).value) 170 #define HEIMDAL_key_delete(k) do { (*(k).destructor)((k).value); } while(0) 171 172 #undef HEIMDAL_internal_thread_key 173 #endif /* HEIMDAL_internal_thread_key */ 174 175 #endif /* HEIM_THREADS_H */ 176