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_arch_thread_mutex.h"
18 #define APR_WANT_MEMFUNC
19 #include "apr_want.h"
20
21 #if APR_HAS_THREADS
22
thread_mutex_cleanup(void * data)23 static apr_status_t thread_mutex_cleanup(void *data)
24 {
25 apr_thread_mutex_t *mutex = data;
26 apr_status_t rv;
27
28 rv = pthread_mutex_destroy(&mutex->mutex);
29 #ifdef HAVE_ZOS_PTHREADS
30 if (rv) {
31 rv = errno;
32 }
33 #endif
34 return rv;
35 }
36
apr_thread_mutex_create(apr_thread_mutex_t ** mutex,unsigned int flags,apr_pool_t * pool)37 APR_DECLARE(apr_status_t) apr_thread_mutex_create(apr_thread_mutex_t **mutex,
38 unsigned int flags,
39 apr_pool_t *pool)
40 {
41 apr_thread_mutex_t *new_mutex;
42 apr_status_t rv;
43
44 #ifndef HAVE_PTHREAD_MUTEX_RECURSIVE
45 if (flags & APR_THREAD_MUTEX_NESTED) {
46 return APR_ENOTIMPL;
47 }
48 #endif
49
50 new_mutex = apr_pcalloc(pool, sizeof(apr_thread_mutex_t));
51 new_mutex->pool = pool;
52
53 #ifdef HAVE_PTHREAD_MUTEX_RECURSIVE
54 if (flags & APR_THREAD_MUTEX_NESTED) {
55 pthread_mutexattr_t mattr;
56
57 rv = pthread_mutexattr_init(&mattr);
58 if (rv) return rv;
59
60 rv = pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_RECURSIVE);
61 if (rv) {
62 pthread_mutexattr_destroy(&mattr);
63 return rv;
64 }
65
66 rv = pthread_mutex_init(&new_mutex->mutex, &mattr);
67
68 pthread_mutexattr_destroy(&mattr);
69 } else
70 #endif
71 rv = pthread_mutex_init(&new_mutex->mutex, NULL);
72
73 if (rv) {
74 #ifdef HAVE_ZOS_PTHREADS
75 rv = errno;
76 #endif
77 return rv;
78 }
79
80 apr_pool_cleanup_register(new_mutex->pool,
81 new_mutex, thread_mutex_cleanup,
82 apr_pool_cleanup_null);
83
84 *mutex = new_mutex;
85 return APR_SUCCESS;
86 }
87
apr_thread_mutex_lock(apr_thread_mutex_t * mutex)88 APR_DECLARE(apr_status_t) apr_thread_mutex_lock(apr_thread_mutex_t *mutex)
89 {
90 apr_status_t rv;
91
92 rv = pthread_mutex_lock(&mutex->mutex);
93 #ifdef HAVE_ZOS_PTHREADS
94 if (rv) {
95 rv = errno;
96 }
97 #endif
98
99 return rv;
100 }
101
apr_thread_mutex_trylock(apr_thread_mutex_t * mutex)102 APR_DECLARE(apr_status_t) apr_thread_mutex_trylock(apr_thread_mutex_t *mutex)
103 {
104 apr_status_t rv;
105
106 rv = pthread_mutex_trylock(&mutex->mutex);
107 if (rv) {
108 #ifdef HAVE_ZOS_PTHREADS
109 rv = errno;
110 #endif
111 return (rv == EBUSY) ? APR_EBUSY : rv;
112 }
113
114 return APR_SUCCESS;
115 }
116
apr_thread_mutex_unlock(apr_thread_mutex_t * mutex)117 APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex)
118 {
119 apr_status_t status;
120
121 status = pthread_mutex_unlock(&mutex->mutex);
122 #ifdef HAVE_ZOS_PTHREADS
123 if (status) {
124 status = errno;
125 }
126 #endif
127
128 return status;
129 }
130
apr_thread_mutex_destroy(apr_thread_mutex_t * mutex)131 APR_DECLARE(apr_status_t) apr_thread_mutex_destroy(apr_thread_mutex_t *mutex)
132 {
133 return apr_pool_cleanup_run(mutex->pool, mutex, thread_mutex_cleanup);
134 }
135
136 APR_POOL_IMPLEMENT_ACCESSOR(thread_mutex)
137
138 #endif /* APR_HAS_THREADS */
139