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/* 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_general.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_portable.h"
#include "apr_arch_thread_mutex.h"
#include "apr_arch_file_io.h"
#include <string.h>
#include <stddef.h>
static apr_status_t thread_mutex_cleanup(void *themutex)
{
apr_thread_mutex_t *mutex = themutex;
return apr_thread_mutex_destroy(mutex);
}
/* XXX: Need to respect APR_THREAD_MUTEX_[UN]NESTED flags argument
* or return APR_ENOTIMPL!!!
*/
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;
ULONG rc;
new_mutex = (apr_thread_mutex_t *)apr_palloc(pool, sizeof(apr_thread_mutex_t));
new_mutex->pool = pool;
rc = DosCreateMutexSem(NULL, &(new_mutex->hMutex), 0, FALSE);
*mutex = new_mutex;
if (!rc)
apr_pool_cleanup_register(pool, new_mutex, thread_mutex_cleanup, apr_pool_cleanup_null);
return APR_FROM_OS_ERROR(rc);
}
APR_DECLARE(apr_status_t) apr_thread_mutex_lock(apr_thread_mutex_t *mutex)
{
ULONG rc = DosRequestMutexSem(mutex->hMutex, SEM_INDEFINITE_WAIT);
return APR_FROM_OS_ERROR(rc);
}
APR_DECLARE(apr_status_t) apr_thread_mutex_trylock(apr_thread_mutex_t *mutex)
{
ULONG rc = DosRequestMutexSem(mutex->hMutex, SEM_IMMEDIATE_RETURN);
return (rc == ERROR_TIMEOUT) ? APR_EBUSY : APR_FROM_OS_ERROR(rc);
}
APR_DECLARE(apr_status_t) apr_thread_mutex_timedlock(apr_thread_mutex_t *mutex,
apr_interval_time_t timeout)
{
ULONG rc;
if (timeout <= 0) {
rc = DosRequestMutexSem(mutex->hMutex, SEM_IMMEDIATE_RETURN);
}
else {
rc = DosRequestMutexSem(mutex->hMutex, apr_time_as_msec(timeout));
}
return (rc == ERROR_TIMEOUT) ? APR_TIMEUP : APR_FROM_OS_ERROR(rc);
}
APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex)
{
ULONG rc = DosReleaseMutexSem(mutex->hMutex);
return APR_FROM_OS_ERROR(rc);
}
APR_DECLARE(apr_status_t) apr_thread_mutex_destroy(apr_thread_mutex_t *mutex)
{
ULONG rc;
if (mutex->hMutex == 0)
return APR_SUCCESS;
while (DosReleaseMutexSem(mutex->hMutex) == 0);
rc = DosCloseMutexSem(mutex->hMutex);
if (!rc) {
mutex->hMutex = 0;
return APR_SUCCESS;
}
return APR_FROM_OS_ERROR(rc);
}
APR_POOL_IMPLEMENT_ACCESSOR(thread_mutex)
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