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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
#include "apr_general.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_portable.h"
#include "thread_mutex.h"
#include "fileio.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);
}
APR_DECLARE(apr_status_t) apr_thread_mutex_create(apr_thread_mutex_t **mutex,
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_OS2_STATUS(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_OS2_STATUS(rc);
}
APR_DECLARE(apr_status_t) apr_thread_mutex_trylock(apr_thread_mutex_t *mutex)
{
ULONG rc = DosRequestMutexSem(mutex->hMutex, SEM_IMMEDIATE_RETURN);
return APR_OS2_STATUS(rc);
}
APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex)
{
ULONG rc = DosReleaseMutexSem(mutex->hMutex);
return APR_OS2_STATUS(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);
}
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