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/*
*
* Copyright (c) 2008 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 "qpid/sys/LockFile.h"
#include "qpid/sys/windows/check.h"
#include <windows.h>
namespace qpid {
namespace sys {
class LockFilePrivate {
friend class LockFile;
HANDLE fd;
public:
LockFilePrivate(HANDLE f) : fd(f) {}
};
LockFile::LockFile(const std::string& path_, bool create)
: path(path_), created(create) {
HANDLE h = ::CreateFile(path.c_str(),
create ? (GENERIC_READ|GENERIC_WRITE) : GENERIC_READ,
FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
0, /* Default security */
create ? OPEN_ALWAYS : OPEN_EXISTING,
FILE_FLAG_DELETE_ON_CLOSE, /* Delete file when closed */
NULL);
if (h == INVALID_HANDLE_VALUE)
throw qpid::Exception(path + ": " + qpid::sys::strError(GetLastError()));
// Lock up to 4Gb
if (!::LockFile(h, 0, 0, 0xffffffff, 0))
throw qpid::Exception(path + ": " + qpid::sys::strError(GetLastError()));
impl.reset(new LockFilePrivate(h));
}
LockFile::~LockFile() {
if (impl) {
if (impl->fd != INVALID_HANDLE_VALUE) {
::UnlockFile(impl->fd, 0, 0, 0xffffffff, 0);
::CloseHandle(impl->fd);
}
}
}
}} /* namespace qpid::sys */
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