1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef WIN32
/* POSIX defines 1024 for the FD_SETSIZE */
#define FD_SETSIZE 1024
#endif
#include "apr.h"
#include "apr_poll.h"
#include "apr_time.h"
#include "apr_portable.h"
#include "apr_arch_file_io.h"
#include "apr_arch_networkio.h"
#include "apr_arch_poll_private.h"
static apr_pollset_method_e pollset_default_method = POLLSET_DEFAULT_METHOD;
#if defined(HAVE_KQUEUE)
extern const apr_pollcb_provider_t *apr_pollcb_provider_kqueue;
#endif
#if defined(HAVE_PORT_CREATE)
extern const apr_pollcb_provider_t *apr_pollcb_provider_port;
#endif
#if defined(HAVE_EPOLL)
extern const apr_pollcb_provider_t *apr_pollcb_provider_epoll;
#endif
#if defined(HAVE_POLL)
extern const apr_pollcb_provider_t *apr_pollcb_provider_poll;
#endif
static const apr_pollcb_provider_t *pollcb_provider(apr_pollset_method_e method)
{
const apr_pollcb_provider_t *provider = NULL;
switch (method) {
case APR_POLLSET_KQUEUE:
#if defined(HAVE_KQUEUE)
provider = apr_pollcb_provider_kqueue;
#endif
break;
case APR_POLLSET_PORT:
#if defined(HAVE_PORT_CREATE)
provider = apr_pollcb_provider_port;
#endif
break;
case APR_POLLSET_EPOLL:
#if defined(HAVE_EPOLL)
provider = apr_pollcb_provider_epoll;
#endif
break;
case APR_POLLSET_POLL:
#if defined(HAVE_POLL)
provider = apr_pollcb_provider_poll;
#endif
break;
case APR_POLLSET_SELECT:
case APR_POLLSET_AIO_MSGQ:
case APR_POLLSET_DEFAULT:
break;
}
return provider;
}
static apr_status_t pollcb_cleanup(void *p)
{
apr_pollcb_t *pollcb = (apr_pollcb_t *) p;
if (pollcb->provider->cleanup) {
(*pollcb->provider->cleanup)(pollcb);
}
if (pollcb->flags & APR_POLLSET_WAKEABLE) {
apr_poll_close_wakeup_pipe(pollcb->wakeup_pipe);
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollcb_create_ex(apr_pollcb_t **ret_pollcb,
apr_uint32_t size,
apr_pool_t *p,
apr_uint32_t flags,
apr_pollset_method_e method)
{
apr_status_t rv;
apr_pollcb_t *pollcb;
const apr_pollcb_provider_t *provider = NULL;
*ret_pollcb = NULL;
#ifdef WIN32
/* This will work only if ws2_32.dll has WSAPoll funtion.
* We could check the presence of the function here,
* but someone might implement other pollcb method in
* the future.
*/
if (method == APR_POLLSET_DEFAULT) {
method = APR_POLLSET_POLL;
}
#endif
if (method == APR_POLLSET_DEFAULT)
method = pollset_default_method;
while (provider == NULL) {
provider = pollcb_provider(method);
if (!provider) {
if ((flags & APR_POLLSET_NODEFAULT) == APR_POLLSET_NODEFAULT)
return APR_ENOTIMPL;
if (method == pollset_default_method)
return APR_ENOTIMPL;
method = pollset_default_method;
}
}
if (flags & APR_POLLSET_WAKEABLE) {
/* Add room for wakeup descriptor */
size++;
}
pollcb = apr_palloc(p, sizeof(*pollcb));
pollcb->nelts = 0;
pollcb->nalloc = size;
pollcb->flags = flags;
pollcb->pool = p;
pollcb->provider = provider;
rv = (*provider->create)(pollcb, size, p, flags);
if (rv == APR_ENOTIMPL) {
if (method == pollset_default_method) {
return rv;
}
if ((flags & APR_POLLSET_NODEFAULT) == APR_POLLSET_NODEFAULT) {
return rv;
}
/* Try with default provider */
provider = pollcb_provider(pollset_default_method);
if (!provider) {
return APR_ENOTIMPL;
}
rv = (*provider->create)(pollcb, size, p, flags);
if (rv != APR_SUCCESS) {
return rv;
}
pollcb->provider = provider;
}
else if (rv != APR_SUCCESS) {
return rv;
}
if (flags & APR_POLLSET_WAKEABLE) {
/* Create wakeup pipe */
if ((rv = apr_poll_create_wakeup_pipe(pollcb->pool, &pollcb->wakeup_pfd,
pollcb->wakeup_pipe))
!= APR_SUCCESS) {
return rv;
}
if ((rv = apr_pollcb_add(pollcb, &pollcb->wakeup_pfd)) != APR_SUCCESS) {
return rv;
}
}
if ((flags & APR_POLLSET_WAKEABLE) || provider->cleanup)
apr_pool_cleanup_register(p, pollcb, pollcb_cleanup,
apr_pool_cleanup_null);
*ret_pollcb = pollcb;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_pollcb_create(apr_pollcb_t **pollcb,
apr_uint32_t size,
apr_pool_t *p,
apr_uint32_t flags)
{
apr_pollset_method_e method = APR_POLLSET_DEFAULT;
return apr_pollcb_create_ex(pollcb, size, p, flags, method);
}
APR_DECLARE(apr_status_t) apr_pollcb_add(apr_pollcb_t *pollcb,
apr_pollfd_t *descriptor)
{
return (*pollcb->provider->add)(pollcb, descriptor);
}
APR_DECLARE(apr_status_t) apr_pollcb_remove(apr_pollcb_t *pollcb,
apr_pollfd_t *descriptor)
{
return (*pollcb->provider->remove)(pollcb, descriptor);
}
APR_DECLARE(apr_status_t) apr_pollcb_poll(apr_pollcb_t *pollcb,
apr_interval_time_t timeout,
apr_pollcb_cb_t func,
void *baton)
{
return (*pollcb->provider->poll)(pollcb, timeout, func, baton);
}
APR_DECLARE(apr_status_t) apr_pollcb_wakeup(apr_pollcb_t *pollcb)
{
if (pollcb->flags & APR_POLLSET_WAKEABLE)
return apr_file_putc(1, pollcb->wakeup_pipe[1]);
else
return APR_EINIT;
}
APR_DECLARE(const char *) apr_pollcb_method_name(apr_pollcb_t *pollcb)
{
return pollcb->provider->name;
}
|
