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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 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 "fileio.h"
APR_DECLARE(apr_status_t) apr_file_lock(apr_file_t *thefile, int type)
{
#ifdef _WIN32_WCE
/* The File locking is unsuported on WCE */
return APR_ENOTIMPL;
#else
const DWORD len = 0xffffffff;
DWORD flags;
flags = ((type & APR_FLOCK_NONBLOCK) ? LOCKFILE_FAIL_IMMEDIATELY : 0)
+ (((type & APR_FLOCK_TYPEMASK) == APR_FLOCK_SHARED)
? 0 : LOCKFILE_EXCLUSIVE_LOCK);
/* XXX on NT 4.0 we get ERROR_LOCK_VIOLATION when we specify
* LOCKFILE_FAIL_IMMEDIATELY and another process is holding
* the lock; something needs to be done so an APR app can
* recognize this as a try-again situation
*/
if (apr_os_level >= APR_WIN_NT) {
/* Syntax is correct, len is passed for LengthLow and LengthHigh*/
OVERLAPPED offset;
memset (&offset, 0, sizeof(offset));
if (!LockFileEx(thefile->filehand, flags, 0, len, len, &offset))
return apr_get_os_error();
}
else {
if (!LockFile(thefile->filehand, 0, 0, len, 0))
return apr_get_os_error();
}
return APR_SUCCESS;
#endif /* !defined(_WIN32_WCE) */
}
APR_DECLARE(apr_status_t) apr_file_unlock(apr_file_t *thefile)
{
#ifdef _WIN32_WCE
return APR_ENOTIMPL;
#else
DWORD len = 0xffffffff;
if (apr_os_level >= APR_WIN_NT) {
/* Syntax is correct, len is passed for LengthLow and LengthHigh*/
OVERLAPPED offset;
memset (&offset, 0, sizeof(offset));
if (!UnlockFileEx(thefile->filehand, 0, len, len, &offset))
return apr_get_os_error();
}
else {
if (!UnlockFile(thefile->filehand, 0, 0, len, 0))
return apr_get_os_error();
}
return APR_SUCCESS;
#endif /* !defined(_WIN32_WCE) */
}
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