buckets/apr_buckets_refcount.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_buckets.h"
  18
  19 APU_DECLARE_NONSTD(apr_status_t) apr_bucket_shared_split(apr_bucket *a,
  20                                                          apr_size_t point)
  21 {
  22     apr_bucket_refcount *r = a->data;
  23     apr_status_t rv;
  24
  25     if ((rv = apr_bucket_simple_split(a, point)) != APR_SUCCESS) {
  26         return rv;
  27     }
  28     r->refcount++;
  29
  30     return APR_SUCCESS;
  31 }
  32
  33 APU_DECLARE_NONSTD(apr_status_t) apr_bucket_shared_copy(apr_bucket *a,
  34                                                         apr_bucket **b)
  35 {
  36     apr_bucket_refcount *r = a->data;
  37
  38     apr_bucket_simple_copy(a, b);
  39     r->refcount++;
  40
  41     return APR_SUCCESS;
  42 }
  43
  44 APU_DECLARE(int) apr_bucket_shared_destroy(void *data)
  45 {
  46     apr_bucket_refcount *r = data;
  47     r->refcount--;
  48     return (r->refcount == 0);
  49 }
  50
  51 APU_DECLARE(apr_bucket *) apr_bucket_shared_make(apr_bucket *b, void *data,
  52                                                  apr_off_t start,
  53                                                  apr_size_t length)
  54 {
  55     apr_bucket_refcount *r = data;
  56
  57     b->data   = r;
  58     b->start  = start;
  59     b->length = length;
  60     /* caller initializes the type field */
  61     r->refcount = 1;
  62
  63     return b;
  64 }