1/* Copyright 2002-2004 Justin Erenkrantz and Greg Stein
2 *
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include <apr_pools.h>
17
18#include "serf.h"
19#include "serf_bucket_util.h"
20
21
22typedef struct {
23    serf_bucket_t *stream;
24} barrier_context_t;
25
26
27serf_bucket_t *serf_bucket_barrier_create(
28    serf_bucket_t *stream,
29    serf_bucket_alloc_t *allocator)
30{
31    barrier_context_t *ctx;
32
33    ctx = serf_bucket_mem_alloc(allocator, sizeof(*ctx));
34    ctx->stream = stream;
35
36    return serf_bucket_create(&serf_bucket_type_barrier, allocator, ctx);
37}
38
39static apr_status_t serf_barrier_read(serf_bucket_t *bucket,
40                                     apr_size_t requested,
41                                     const char **data, apr_size_t *len)
42{
43    barrier_context_t *ctx = bucket->data;
44
45    return serf_bucket_read(ctx->stream, requested, data, len);
46}
47
48static apr_status_t serf_barrier_read_iovec(serf_bucket_t *bucket,
49                                            apr_size_t requested,
50                                            int vecs_size, struct iovec *vecs,
51                                            int *vecs_used)
52{
53    barrier_context_t *ctx = bucket->data;
54
55    return serf_bucket_read_iovec(ctx->stream, requested, vecs_size, vecs,
56                                  vecs_used);
57}
58
59static apr_status_t serf_barrier_readline(serf_bucket_t *bucket,
60                                         int acceptable, int *found,
61                                         const char **data, apr_size_t *len)
62{
63    barrier_context_t *ctx = bucket->data;
64
65    return serf_bucket_readline(ctx->stream, acceptable, found, data, len);
66}
67
68static apr_status_t serf_barrier_peek(serf_bucket_t *bucket,
69                                     const char **data,
70                                     apr_size_t *len)
71{
72    barrier_context_t *ctx = bucket->data;
73
74    return serf_bucket_peek(ctx->stream, data, len);
75}
76
77static void serf_barrier_destroy(serf_bucket_t *bucket)
78{
79    /* The intent of this bucket is not to let our wrapped buckets be
80     * destroyed. */
81
82    /* The option is for us to go ahead and 'eat' this bucket now,
83     * or just ignore the deletion entirely.
84     */
85    serf_default_destroy_and_data(bucket);
86}
87
88const serf_bucket_type_t serf_bucket_type_barrier = {
89    "BARRIER",
90    serf_barrier_read,
91    serf_barrier_readline,
92    serf_barrier_read_iovec,
93    serf_default_read_for_sendfile,
94    serf_default_read_bucket,
95    serf_barrier_peek,
96    serf_barrier_destroy,
97};
98