bsd/kern/pthread_support.c

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995-2005 Apple Computer, Inc. All Rights Reserved */
  29 /*
  30  *      pthread_support.c
  31  */
  32
  33
  34 #define  _PTHREAD_CONDATTR_T
  35 #define  _PTHREAD_COND_T
  36 #define _PTHREAD_MUTEXATTR_T
  37 #define _PTHREAD_MUTEX_T
  38 #define _PTHREAD_RWLOCKATTR_T
  39 #define _PTHREAD_RWLOCK_T
  40
  41 #undef pthread_mutexattr_t
  42 #undef pthread_mutex_t
  43 #undef pthread_condattr_t
  44 #undef pthread_cond_t
  45 #undef pthread_rwlockattr_t
  46 #undef pthread_rwlock_t
  47
  48 #include <sys/param.h>
  49 #include <sys/resourcevar.h>
  50 #include <sys/proc_internal.h>
  51 #include <sys/kauth.h>
  52 #include <sys/systm.h>
  53 #include <sys/timeb.h>
  54 #include <sys/times.h>
  55 #include <sys/acct.h>
  56 #include <sys/file_internal.h>
  57 #include <sys/kernel.h>
  58 #include <sys/wait.h>
  59 #include <sys/signalvar.h>
  60 #include <sys/syslog.h>
  61 #include <sys/stat.h>
  62 #include <sys/lock.h>
  63 #include <sys/kdebug.h>
  64
  65 #include <sys/mount.h>
  66 #include <sys/sysproto.h>
  67
  68 #include <sys/vm.h>
  69 #include <kern/task.h>
  70 #include <kern/thread.h>
  71
  72 #include <sys/pthread_internal.h>
  73
  74 #define PTHREAD_SYNCH_MAX 256
  75 static pthread_mutex_t * pmutex_trans_array[PTHREAD_SYNCH_MAX];
  76 static pthread_cond_t * pcond_trans_array[PTHREAD_SYNCH_MAX];
  77 //static pthread_rwlock_t * prwlock_trans_array[PTHREAD_SYNCH_MAX];
  78
  79 pthread_mutex_t *
  80 pthread_id_to_mutex(int mutexid)
  81 {
  82         pthread_mutex_t * mtx = NULL;
  83
  84
  85         if (mutexid >= 0 && mutexid < PTHREAD_SYNCH_MAX) {
  86                         pthread_list_lock();
  87                         mtx = pmutex_trans_array[mutexid];
  88                         if (mtx) {
  89                                 MTX_LOCK(mtx->lock);
  90                                 mtx->refcount++;
  91                                 MTX_UNLOCK(mtx->lock);
  92                         }
  93                         pthread_list_unlock();
  94         }
  95         return(mtx);
  96 }
  97
  98
  99 int
 100 pthread_id_mutex_add(pthread_mutex_t * mutex)
 101 {
 102         int i;
 103
 104         pthread_list_lock();
 105         for(i = 1; i < PTHREAD_SYNCH_MAX; i++) {
 106                 if (pmutex_trans_array[i] == 0) {
 107                         pmutex_trans_array[i]  = mutex;
 108                         break;
 109                 }
 110         }
 111         pthread_list_unlock();
 112         if (i == PTHREAD_SYNCH_MAX)
 113                 return(0);
 114         return(i);
 115 }
 116
 117
 118 void
 119 pthread_id_mutex_remove(int mutexid)
 120 {
 121         pthread_list_lock();
 122         if (pmutex_trans_array[mutexid]) {
 123                 pmutex_trans_array[mutexid] = 0;
 124         }
 125         pthread_list_unlock();
 126 }
 127
 128
 129 void
 130 pthread_mutex_release(pthread_mutex_t * mutex)
 131 {
 132         MTX_LOCK(mutex->lock);
 133         mutex->refcount --;
 134         MTX_UNLOCK(mutex->lock);
 135 }
 136
 137
 138 pthread_cond_t *
 139 pthread_id_to_cond(int condid)
 140 {
 141         pthread_cond_t * cond = NULL;
 142
 143
 144         if (condid >= 0 && condid < PTHREAD_SYNCH_MAX) {
 145                         pthread_list_lock();
 146                         cond = pcond_trans_array[condid];
 147                         if (cond) {
 148                                 COND_LOCK(cond->lock);
 149                                 cond->refcount++;
 150                                 COND_UNLOCK(cond->lock);
 151                         }
 152                         pthread_list_unlock();
 153         }
 154         return(cond);
 155 }
 156
 157
 158 int
 159 pthread_id_cond_add(pthread_cond_t * cond)
 160 {
 161         int i;
 162
 163         pthread_list_lock();
 164         for(i = 1; i < PTHREAD_SYNCH_MAX; i++) {
 165                 if (pcond_trans_array[i] == 0) {
 166                         pcond_trans_array[i]  = cond;
 167                         break;
 168                 }
 169         }
 170         pthread_list_unlock();
 171         if (i == PTHREAD_SYNCH_MAX)
 172                 return(0);
 173         return(i);
 174 }
 175
 176
 177 void
 178 pthread_id_cond_remove(int condid)
 179 {
 180         pthread_list_lock();
 181         if (pcond_trans_array[condid]) {
 182                 pcond_trans_array[condid] = 0;
 183         }
 184         pthread_list_unlock();
 185 }
 186
 187
 188 void
 189 pthread_cond_release(pthread_cond_t * cond)
 190 {
 191         COND_LOCK(cond->lock);
 192         cond->refcount --;
 193         COND_UNLOCK(cond->lock);
 194 }
 195