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/* Copyright 2000-2004 The Apache Software Foundation
*
* Licensed 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_arch_thread_mutex.h"
#define APR_WANT_MEMFUNC
#include "apr_want.h"
#if APR_HAS_THREADS
static apr_status_t thread_mutex_cleanup(void *data)
{
apr_thread_mutex_t *mutex = data;
apr_status_t rv;
rv = pthread_mutex_destroy(&mutex->mutex);
#ifdef PTHREAD_SETS_ERRNO
if (rv) {
rv = errno;
}
#endif
return rv;
}
APR_DECLARE(apr_status_t) apr_thread_mutex_create(apr_thread_mutex_t **mutex,
unsigned int flags,
apr_pool_t *pool)
{
apr_thread_mutex_t *new_mutex;
apr_status_t rv;
#ifndef HAVE_PTHREAD_MUTEX_RECURSIVE
if (flags & APR_THREAD_MUTEX_NESTED) {
return APR_ENOTIMPL;
}
#endif
new_mutex = apr_pcalloc(pool, sizeof(apr_thread_mutex_t));
new_mutex->pool = pool;
#ifdef HAVE_PTHREAD_MUTEX_RECURSIVE
if (flags & APR_THREAD_MUTEX_NESTED) {
pthread_mutexattr_t mattr;
rv = pthread_mutexattr_init(&mattr);
if (rv) return rv;
rv = pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_RECURSIVE);
if (rv) {
pthread_mutexattr_destroy(&mattr);
return rv;
}
rv = pthread_mutex_init(&new_mutex->mutex, &mattr);
pthread_mutexattr_destroy(&mattr);
} else
#endif
rv = pthread_mutex_init(&new_mutex->mutex, NULL);
if (rv) {
#ifdef PTHREAD_SETS_ERRNO
rv = errno;
#endif
return rv;
}
apr_pool_cleanup_register(new_mutex->pool,
new_mutex, thread_mutex_cleanup,
apr_pool_cleanup_null);
*mutex = new_mutex;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_mutex_lock(apr_thread_mutex_t *mutex)
{
apr_status_t rv;
rv = pthread_mutex_lock(&mutex->mutex);
#ifdef PTHREAD_SETS_ERRNO
if (rv) {
rv = errno;
}
#endif
return rv;
}
APR_DECLARE(apr_status_t) apr_thread_mutex_trylock(apr_thread_mutex_t *mutex)
{
apr_status_t rv;
rv = pthread_mutex_trylock(&mutex->mutex);
if (rv) {
#ifdef PTHREAD_SETS_ERRNO
rv = errno;
#endif
return (rv == EBUSY) ? APR_EBUSY : rv;
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex)
{
apr_status_t status;
status = pthread_mutex_unlock(&mutex->mutex);
#ifdef PTHREAD_SETS_ERRNO
if (status) {
status = errno;
}
#endif
return status;
}
APR_DECLARE(apr_status_t) apr_thread_mutex_destroy(apr_thread_mutex_t *mutex)
{
return apr_pool_cleanup_run(mutex->pool, mutex, thread_mutex_cleanup);
}
APR_POOL_IMPLEMENT_ACCESSOR(thread_mutex)
#endif /* APR_HAS_THREADS */
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