rubbos/app/httpd-2.0.64/srclib/apr/locks/netware/thread_rwlock.c

   1 /* Licensed to the Apache Software Foundation (ASF) under one or more
   2  * contributor license agreements.  See the NOTICE file distributed with
   3  * this work for additional information regarding copyright ownership.
   4  * The ASF licenses this file to You under the Apache License, Version 2.0
   5  * (the "License"); you may not use this file except in compliance with
   6  * the License.  You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "apr.h"
  18 #include "apr_private.h"
  19 #include "apr_general.h"
  20 #include "apr_strings.h"
  21 #include "apr_arch_thread_rwlock.h"
  22 #include "apr_portable.h"
  23
  24 static apr_status_t thread_rwlock_cleanup(void *data)
  25 {
  26     apr_thread_rwlock_t *rwlock = (apr_thread_rwlock_t *)data;
  27
  28     NXRwLockFree (rwlock->rwlock);
  29     return APR_SUCCESS;
  30 }
  31
  32 APR_DECLARE(apr_status_t) apr_thread_rwlock_create(apr_thread_rwlock_t **rwlock,
  33                                                    apr_pool_t *pool)
  34 {
  35     apr_thread_rwlock_t *new_rwlock = NULL;
  36
  37         NXHierarchy_t hierarchy = 1;   //for libc NKS NXRwLockAlloc
  38         NXLockInfo_t *info;                        //for libc NKS NXRwLockAlloc
  39
  40     new_rwlock = (apr_thread_rwlock_t *)apr_pcalloc(pool, sizeof(apr_thread_rwlock_t));
  41
  42         if(new_rwlock ==NULL) {
  43         return APR_ENOMEM;
  44     }
  45     new_rwlock->pool = pool;
  46
  47     info = (NXLockInfo_t *)apr_pcalloc(pool, sizeof(NXLockInfo_t));
  48     new_rwlock->rwlock = NXRwLockAlloc(hierarchy, info);
  49     if(new_rwlock->rwlock == NULL)
  50         return APR_ENOMEM;
  51
  52     apr_pool_cleanup_register(new_rwlock->pool, new_rwlock, thread_rwlock_cleanup,
  53                               apr_pool_cleanup_null);
  54     *rwlock = new_rwlock;
  55
  56     return APR_SUCCESS;
  57 }
  58
  59 APR_DECLARE(apr_status_t) apr_thread_rwlock_rdlock(apr_thread_rwlock_t *rwlock)
  60 {
  61     NXRdLock(rwlock->rwlock);
  62     return APR_SUCCESS;
  63 }
  64
  65 APR_DECLARE(apr_status_t) apr_thread_rwlock_tryrdlock(apr_thread_rwlock_t *rwlock)
  66 {
  67     if (!NXTryRdLock(rwlock->rwlock))
  68         return APR_EBUSY;
  69     return APR_SUCCESS;
  70 }
  71
  72 APR_DECLARE(apr_status_t) apr_thread_rwlock_wrlock(apr_thread_rwlock_t *rwlock)
  73 {
  74     NXWrLock(rwlock->rwlock);
  75     return APR_SUCCESS;
  76 }
  77
  78 APR_DECLARE(apr_status_t) apr_thread_rwlock_trywrlock(apr_thread_rwlock_t *rwlock)
  79 {
  80     if (!NXTryWrLock(rwlock->rwlock))
  81         return APR_EBUSY;
  82     return APR_SUCCESS;
  83 }
  84
  85 APR_DECLARE(apr_status_t) apr_thread_rwlock_unlock(apr_thread_rwlock_t *rwlock)
  86 {
  87     NXRwUnlock(rwlock->rwlock);
  88     return APR_SUCCESS;
  89 }
  90
  91 APR_DECLARE(apr_status_t) apr_thread_rwlock_destroy(apr_thread_rwlock_t *rwlock)
  92 {
  93     apr_status_t stat;
  94     if ((stat = thread_rwlock_cleanup(rwlock)) == APR_SUCCESS) {
  95         apr_pool_cleanup_kill(rwlock->pool, rwlock, thread_rwlock_cleanup);
  96         return APR_SUCCESS;
  97     }
  98     return stat;
  99 }
 100
 101 APR_POOL_IMPLEMENT_ACCESSOR(thread_rwlock)
 102