246 lines
6.6 KiB
C
246 lines
6.6 KiB
C
/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "apr.h"
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#include "apr_strings.h"
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#include "apr_arch_global_mutex.h"
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#include "apr_proc_mutex.h"
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#include "apr_thread_mutex.h"
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#include "apr_portable.h"
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static apr_status_t global_mutex_cleanup(void *data)
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{
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apr_global_mutex_t *m = (apr_global_mutex_t *)data;
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apr_status_t rv;
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rv = apr_proc_mutex_destroy(m->proc_mutex);
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#if APR_HAS_THREADS
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if (m->thread_mutex) {
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if (rv != APR_SUCCESS) {
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(void)apr_thread_mutex_destroy(m->thread_mutex);
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}
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else {
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rv = apr_thread_mutex_destroy(m->thread_mutex);
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}
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}
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#endif /* APR_HAS_THREADS */
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return rv;
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}
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APR_DECLARE(apr_status_t) apr_global_mutex_create(apr_global_mutex_t **mutex,
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const char *fname,
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apr_lockmech_e mech,
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apr_pool_t *pool)
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{
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apr_status_t rv;
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apr_global_mutex_t *m;
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m = (apr_global_mutex_t *)apr_palloc(pool, sizeof(*m));
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m->pool = pool;
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rv = apr_proc_mutex_create(&m->proc_mutex, fname, mech, m->pool);
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if (rv != APR_SUCCESS) {
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return rv;
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}
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#if APR_HAS_THREADS
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if (m->proc_mutex->meth->flags & APR_PROCESS_LOCK_MECH_IS_GLOBAL) {
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m->thread_mutex = NULL; /* We don't need a thread lock. */
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}
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else {
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rv = apr_thread_mutex_create(&m->thread_mutex,
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APR_THREAD_MUTEX_DEFAULT, m->pool);
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if (rv != APR_SUCCESS) {
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rv = apr_proc_mutex_destroy(m->proc_mutex);
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return rv;
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}
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}
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#endif /* APR_HAS_THREADS */
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apr_pool_cleanup_register(m->pool, (void *)m,
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global_mutex_cleanup, apr_pool_cleanup_null);
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*mutex = m;
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_global_mutex_child_init(
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apr_global_mutex_t **mutex,
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const char *fname,
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apr_pool_t *pool)
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{
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apr_status_t rv;
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rv = apr_proc_mutex_child_init(&((*mutex)->proc_mutex), fname, pool);
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return rv;
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}
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APR_DECLARE(apr_status_t) apr_global_mutex_lock(apr_global_mutex_t *mutex)
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{
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apr_status_t rv;
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#if APR_HAS_THREADS
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if (mutex->thread_mutex) {
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rv = apr_thread_mutex_lock(mutex->thread_mutex);
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if (rv != APR_SUCCESS) {
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return rv;
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}
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}
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#endif /* APR_HAS_THREADS */
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rv = apr_proc_mutex_lock(mutex->proc_mutex);
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#if APR_HAS_THREADS
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if (rv != APR_SUCCESS) {
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if (mutex->thread_mutex) {
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(void)apr_thread_mutex_unlock(mutex->thread_mutex);
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}
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}
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#endif /* APR_HAS_THREADS */
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return rv;
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}
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APR_DECLARE(apr_status_t) apr_global_mutex_trylock(apr_global_mutex_t *mutex)
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{
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apr_status_t rv;
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#if APR_HAS_THREADS
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if (mutex->thread_mutex) {
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rv = apr_thread_mutex_trylock(mutex->thread_mutex);
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if (rv != APR_SUCCESS) {
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return rv;
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}
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}
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#endif /* APR_HAS_THREADS */
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rv = apr_proc_mutex_trylock(mutex->proc_mutex);
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#if APR_HAS_THREADS
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if (rv != APR_SUCCESS) {
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if (mutex->thread_mutex) {
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(void)apr_thread_mutex_unlock(mutex->thread_mutex);
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}
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}
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#endif /* APR_HAS_THREADS */
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return rv;
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}
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APR_DECLARE(apr_status_t) apr_global_mutex_timedlock(apr_global_mutex_t *mutex,
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apr_interval_time_t timeout)
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{
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#if APR_HAS_TIMEDLOCKS
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apr_status_t rv;
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#if APR_HAS_THREADS
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if (mutex->thread_mutex) {
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apr_time_t expiry = 0;
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if (timeout > 0) {
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expiry = apr_time_now() + timeout;
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}
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rv = apr_thread_mutex_timedlock(mutex->thread_mutex, timeout);
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if (rv != APR_SUCCESS) {
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return rv;
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}
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if (expiry) {
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timeout = expiry - apr_time_now();
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if (timeout < 0) {
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timeout = 0;
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}
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}
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}
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#endif /* APR_HAS_THREADS */
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rv = apr_proc_mutex_timedlock(mutex->proc_mutex, timeout);
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#if APR_HAS_THREADS
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if (rv != APR_SUCCESS) {
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if (mutex->thread_mutex) {
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(void)apr_thread_mutex_unlock(mutex->thread_mutex);
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}
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}
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#endif /* APR_HAS_THREADS */
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return rv;
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#else /* APR_HAS_TIMEDLOCKS */
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return APR_ENOTIMPL;
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#endif
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}
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APR_DECLARE(apr_status_t) apr_global_mutex_unlock(apr_global_mutex_t *mutex)
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{
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apr_status_t rv;
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rv = apr_proc_mutex_unlock(mutex->proc_mutex);
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#if APR_HAS_THREADS
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if (mutex->thread_mutex) {
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if (rv != APR_SUCCESS) {
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(void)apr_thread_mutex_unlock(mutex->thread_mutex);
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}
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else {
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rv = apr_thread_mutex_unlock(mutex->thread_mutex);
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}
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}
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#endif /* APR_HAS_THREADS */
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return rv;
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}
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APR_DECLARE(apr_status_t) apr_os_global_mutex_get(apr_os_global_mutex_t *ospmutex,
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apr_global_mutex_t *pmutex)
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{
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ospmutex->pool = pmutex->pool;
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ospmutex->proc_mutex = pmutex->proc_mutex;
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#if APR_HAS_THREADS
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ospmutex->thread_mutex = pmutex->thread_mutex;
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#endif
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_global_mutex_destroy(apr_global_mutex_t *mutex)
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{
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return apr_pool_cleanup_run(mutex->pool, mutex, global_mutex_cleanup);
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}
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APR_DECLARE(const char *) apr_global_mutex_lockfile(apr_global_mutex_t *mutex)
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{
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return apr_proc_mutex_lockfile(mutex->proc_mutex);
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}
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APR_DECLARE(apr_lockmech_e) apr_global_mutex_mech(apr_global_mutex_t *mutex)
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{
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return apr_proc_mutex_mech(mutex->proc_mutex);
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}
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APR_DECLARE(const char *) apr_global_mutex_name(apr_global_mutex_t *mutex)
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{
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return apr_proc_mutex_name(mutex->proc_mutex);
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}
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APR_PERMS_SET_IMPLEMENT(global_mutex)
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{
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apr_status_t rv;
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apr_global_mutex_t *mutex = (apr_global_mutex_t *)theglobal_mutex;
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rv = APR_PERMS_SET_FN(proc_mutex)(mutex->proc_mutex, perms, uid, gid);
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return rv;
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}
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APR_POOL_IMPLEMENT_ACCESSOR(global_mutex)
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