chrome/browser/importer/firefox_profile_lock_win.cc

   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@netscape.com>
  35 *   Brendan Eich <brendan@mozilla.org>
  36 *   Colin Blake <colin@theblakes.com>
  37 *   Javier Pedemonte <pedemont@us.ibm.com>
  38 *   Mats Palmgren <mats.palmgren@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 }