source4/heimdal/include/heim_threads.h

   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 */