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      1 // Copyright (c) 2008 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/importer/firefox_profile_lock.h"
      6 
      7 #include <windows.h>
      8 
      9 // This class is based on Firefox code in:
     10 //   profile/dirserviceprovider/src/nsProfileLock.cpp
     11 // The license block is:
     12 
     13 /* ***** BEGIN LICENSE BLOCK *****
     14 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
     15 *
     16 * The contents of this file are subject to the Mozilla Public License Version
     17 * 1.1 (the "License"); you may not use this file except in compliance with
     18 * the License. You may obtain a copy of the License at
     19 * http://www.mozilla.org/MPL/
     20 *
     21 * Software distributed under the License is distributed on an "AS IS" basis,
     22 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
     23 * for the specific language governing rights and limitations under the
     24 * License.
     25 *
     26 * The Original Code is mozilla.org code.
     27 *
     28 * The Initial Developer of the Original Code is
     29 * Netscape Communications Corporation.
     30 * Portions created by the Initial Developer are Copyright (C) 2002
     31 * the Initial Developer. All Rights Reserved.
     32 *
     33 * Contributor(s):
     34 *   Conrad Carlen <ccarlen (at) netscape.com>
     35 *   Brendan Eich <brendan (at) mozilla.org>
     36 *   Colin Blake <colin (at) theblakes.com>
     37 *   Javier Pedemonte <pedemont (at) us.ibm.com>
     38 *   Mats Palmgren <mats.palmgren (at) bredband.net>
     39 *
     40 * Alternatively, the contents of this file may be used under the terms of
     41 * either the GNU General Public License Version 2 or later (the "GPL"), or
     42 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
     43 * in which case the provisions of the GPL or the LGPL are applicable instead
     44 * of those above. If you wish to allow use of your version of this file only
     45 * under the terms of either the GPL or the LGPL, and not to allow others to
     46 * use your version of this file under the terms of the MPL, indicate your
     47 * decision by deleting the provisions above and replace them with the notice
     48 * and other provisions required by the GPL or the LGPL. If you do not delete
     49 * the provisions above, a recipient may use your version of this file under
     50 * the terms of any one of the MPL, the GPL or the LGPL.
     51 *
     52 * ***** END LICENSE BLOCK ***** */
     53 
     54 void FirefoxProfileLock::Init() {
     55   lock_handle_ = INVALID_HANDLE_VALUE;
     56 }
     57 
     58 void FirefoxProfileLock::Lock() {
     59   if (HasAcquired())
     60     return;
     61   lock_handle_ = CreateFile(lock_file_.value().c_str(),
     62                             GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_ALWAYS,
     63                             FILE_FLAG_DELETE_ON_CLOSE, NULL);
     64 }
     65 
     66 void FirefoxProfileLock::Unlock() {
     67   if (!HasAcquired())
     68     return;
     69   CloseHandle(lock_handle_);
     70   lock_handle_ = INVALID_HANDLE_VALUE;
     71 }
     72 
     73 bool FirefoxProfileLock::HasAcquired() {
     74   return (lock_handle_ != INVALID_HANDLE_VALUE);
     75 }
     76