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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/* 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.
*/
#include "apr.h"
#include "apr_strings.h"
#include "apr_arch_global_mutex.h"
#include "apr_proc_mutex.h"
#include "apr_thread_mutex.h"
#include "apr_portable.h"
static apr_status_t global_mutex_cleanup(void *data)
{
apr_global_mutex_t *m = (apr_global_mutex_t *)data;
apr_status_t rv;
rv = apr_proc_mutex_destroy(m->proc_mutex);
#if APR_HAS_THREADS
if (m->thread_mutex) {
if (rv != APR_SUCCESS) {
(void)apr_thread_mutex_destroy(m->thread_mutex);
}
else {
rv = apr_thread_mutex_destroy(m->thread_mutex);
}
}
#endif /* APR_HAS_THREADS */
return rv;
}
APR_DECLARE(apr_status_t) apr_global_mutex_create(apr_global_mutex_t **mutex,
const char *fname,
apr_lockmech_e mech,
apr_pool_t *pool)
{
apr_status_t rv;
apr_global_mutex_t *m;
m = (apr_global_mutex_t *)apr_palloc(pool, sizeof(*m));
m->pool = pool;
rv = apr_proc_mutex_create(&m->proc_mutex, fname, mech, m->pool);
if (rv != APR_SUCCESS) {
return rv;
}
#if APR_HAS_THREADS
if (m->proc_mutex->meth->flags & APR_PROCESS_LOCK_MECH_IS_GLOBAL) {
m->thread_mutex = NULL; /* We don't need a thread lock. */
}
else {
rv = apr_thread_mutex_create(&m->thread_mutex,
APR_THREAD_MUTEX_DEFAULT, m->pool);
if (rv != APR_SUCCESS) {
rv = apr_proc_mutex_destroy(m->proc_mutex);
return rv;
}
}
#endif /* APR_HAS_THREADS */
apr_pool_cleanup_register(m->pool, (void *)m,
global_mutex_cleanup, apr_pool_cleanup_null);
*mutex = m;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_global_mutex_child_init(
apr_global_mutex_t **mutex,
const char *fname,
apr_pool_t *pool)
{
apr_status_t rv;
rv = apr_proc_mutex_child_init(&((*mutex)->proc_mutex), fname, pool);
return rv;
}
APR_DECLARE(apr_status_t) apr_global_mutex_lock(apr_global_mutex_t *mutex)
{
apr_status_t rv;
#if APR_HAS_THREADS
if (mutex->thread_mutex) {
rv = apr_thread_mutex_lock(mutex->thread_mutex);
if (rv != APR_SUCCESS) {
return rv;
}
}
#endif /* APR_HAS_THREADS */
rv = apr_proc_mutex_lock(mutex->proc_mutex);
#if APR_HAS_THREADS
if (rv != APR_SUCCESS) {
if (mutex->thread_mutex) {
(void)apr_thread_mutex_unlock(mutex->thread_mutex);
}
}
#endif /* APR_HAS_THREADS */
return rv;
}
APR_DECLARE(apr_status_t) apr_global_mutex_trylock(apr_global_mutex_t *mutex)
{
apr_status_t rv;
#if APR_HAS_THREADS
if (mutex->thread_mutex) {
rv = apr_thread_mutex_trylock(mutex->thread_mutex);
if (rv != APR_SUCCESS) {
return rv;
}
}
#endif /* APR_HAS_THREADS */
rv = apr_proc_mutex_trylock(mutex->proc_mutex);
#if APR_HAS_THREADS
if (rv != APR_SUCCESS) {
if (mutex->thread_mutex) {
(void)apr_thread_mutex_unlock(mutex->thread_mutex);
}
}
#endif /* APR_HAS_THREADS */
return rv;
}
APR_DECLARE(apr_status_t) apr_global_mutex_timedlock(apr_global_mutex_t *mutex,
apr_time_t timeout)
{
apr_status_t rv;
#if APR_HAS_THREADS
if (mutex->thread_mutex) {
apr_time_t expiry = 0;
if (timeout > 0) {
expiry = apr_time_now() + timeout;
}
rv = apr_thread_mutex_timedlock(mutex->thread_mutex, timeout);
if (rv != APR_SUCCESS) {
return rv;
}
if (expiry) {
timeout = expiry - apr_time_now();
if (timeout < 0) {
timeout = 0;
}
}
}
#endif /* APR_HAS_THREADS */
rv = apr_proc_mutex_timedlock(mutex->proc_mutex, timeout);
#if APR_HAS_THREADS
if (rv != APR_SUCCESS) {
if (mutex->thread_mutex) {
(void)apr_thread_mutex_unlock(mutex->thread_mutex);
}
}
#endif /* APR_HAS_THREADS */
return rv;
}
APR_DECLARE(apr_status_t) apr_global_mutex_unlock(apr_global_mutex_t *mutex)
{
apr_status_t rv;
rv = apr_proc_mutex_unlock(mutex->proc_mutex);
#if APR_HAS_THREADS
if (mutex->thread_mutex) {
if (rv != APR_SUCCESS) {
(void)apr_thread_mutex_unlock(mutex->thread_mutex);
}
else {
rv = apr_thread_mutex_unlock(mutex->thread_mutex);
}
}
#endif /* APR_HAS_THREADS */
return rv;
}
APR_DECLARE(apr_status_t) apr_os_global_mutex_get(apr_os_global_mutex_t *ospmutex,
apr_global_mutex_t *pmutex)
{
ospmutex->pool = pmutex->pool;
ospmutex->proc_mutex = pmutex->proc_mutex;
#if APR_HAS_THREADS
ospmutex->thread_mutex = pmutex->thread_mutex;
#endif
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_global_mutex_destroy(apr_global_mutex_t *mutex)
{
return apr_pool_cleanup_run(mutex->pool, mutex, global_mutex_cleanup);
}
APR_DECLARE(const char *) apr_global_mutex_lockfile(apr_global_mutex_t *mutex)
{
return apr_proc_mutex_lockfile(mutex->proc_mutex);
}
APR_DECLARE(apr_lockmech_e) apr_global_mutex_mech(apr_global_mutex_t *mutex)
{
return apr_proc_mutex_mech(mutex->proc_mutex);
}
APR_DECLARE(const char *) apr_global_mutex_name(apr_global_mutex_t *mutex)
{
return apr_proc_mutex_name(mutex->proc_mutex);
}
APR_PERMS_SET_IMPLEMENT(global_mutex)
{
apr_status_t rv;
apr_global_mutex_t *mutex = (apr_global_mutex_t *)theglobal_mutex;
rv = APR_PERMS_SET_FN(proc_mutex)(mutex->proc_mutex, perms, uid, gid);
return rv;
}
APR_POOL_IMPLEMENT_ACCESSOR(global_mutex)
|
