// Copyright 2005-2020 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.

#include "UserLockFile.h"

UserLockFile::UserLockFile(const QString &lockFilePath)
	: m_handle(0)
	, m_path(lockFilePath) {
}

UserLockFile::~UserLockFile() {
	release();
}

QString UserLockFile::path() const {
	return m_path;
}

bool UserLockFile::acquire() {
	if (m_handle != 0) {
		return false;
	}

	m_handle = CreateFile(
		reinterpret_cast<const wchar_t *>(m_path.utf16()),
		GENERIC_WRITE,
		0,
		NULL,
		CREATE_ALWAYS,
		FILE_ATTRIBUTE_HIDDEN,
		NULL
	);
	if (m_handle == INVALID_HANDLE_VALUE && GetLastError() == ERROR_SHARING_VIOLATION) {
		return false;
	}
	return true;
}

void UserLockFile::release() {
	if (m_handle != 0) {
		CloseHandle(m_handle);
		m_handle = 0;
	}
}