| /* 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->inter_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_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_POOL_IMPLEMENT_ACCESSOR(global_mutex) |