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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
21 #include "apr_private.h"
22 #include "apr_general.h"
24 #include "apr_proc_mutex.h"
25 #include "apr_pools.h"
26 #include "apr_portable.h"
27 #include "apr_file_io.h"
28 #include "apr_arch_file_io.h"
30 /* System headers required by Locks library */
31 #if APR_HAVE_SYS_TYPES_H
32 #include <sys/types.h>
47 #ifdef HAVE_SYS_FILE_H
59 #ifdef HAVE_SYS_MMAN_H
62 #if APR_HAVE_PTHREAD_H
65 #if APR_HAVE_SEMAPHORE_H
66 #include <semaphore.h>
68 /* End System Headers */
70 struct apr_proc_mutex_unix_lock_methods_t {
72 apr_status_t (*create)(apr_proc_mutex_t *, const char *);
73 apr_status_t (*acquire)(apr_proc_mutex_t *);
74 apr_status_t (*tryacquire)(apr_proc_mutex_t *);
75 apr_status_t (*release)(apr_proc_mutex_t *);
76 apr_status_t (*cleanup)(void *);
77 apr_status_t (*child_init)(apr_proc_mutex_t **, apr_pool_t *, const char *);
80 typedef struct apr_proc_mutex_unix_lock_methods_t apr_proc_mutex_unix_lock_methods_t;
82 /* bit values for flags field in apr_unix_lock_methods_t */
83 #define APR_PROCESS_LOCK_MECH_IS_GLOBAL 1
85 #if !APR_HAVE_UNION_SEMUN && defined(APR_HAS_SYSVSEM_SERIALIZE)
89 unsigned short *array;
93 struct apr_proc_mutex_t {
95 const apr_proc_mutex_unix_lock_methods_t *meth;
96 const apr_proc_mutex_unix_lock_methods_t *inter_meth;
99 #if APR_HAS_SYSVSEM_SERIALIZE || APR_HAS_FCNTL_SERIALIZE || APR_HAS_FLOCK_SERIALIZE
100 apr_file_t *interproc;
102 #if APR_HAS_POSIXSEM_SERIALIZE
103 sem_t *psem_interproc;
105 #if APR_HAS_PROC_PTHREAD_SERIALIZE
106 pthread_mutex_t *pthread_interproc;
110 void apr_proc_mutex_unix_setup_lock(void);
112 #endif /* PROC_MUTEX_H */