base/files/file_path_watcher.cc

   1 // Copyright (c) 2011 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 // Cross platform methods for FilePathWatcher. See the various platform
   6 // specific implementation files, too.
   7
   8 #include "base/files/file_path_watcher.h"
   9
  10 #include "base/logging.h"
  11 #include "base/message_loop/message_loop.h"
  12
  13 #if defined(OS_MACOSX) && !defined(OS_IOS)
  14 #include "base/mac/mac_util.h"
  15 #endif
  16
  17 namespace base {
  18
  19 FilePathWatcher::~FilePathWatcher() {
  20   impl_->Cancel();
  21 }
  22
  23 // static
  24 void FilePathWatcher::CancelWatch(
  25     const scoped_refptr<PlatformDelegate>& delegate) {
  26   delegate->CancelOnMessageLoopThread();
  27 }
  28
  29 // static
  30 bool FilePathWatcher::RecursiveWatchAvailable() {
  31 #if defined(OS_MACOSX) && !defined(OS_IOS)
  32   // FSEvents isn't available on iOS and is broken on OSX 10.6 and earlier.
  33   // See http://crbug.com/54822#c31
  34   return mac::IsOSLionOrLater();
  35 #elif defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)
  36   return true;
  37 #else
  38   return false;
  39 #endif
  40 }
  41
  42 FilePathWatcher::PlatformDelegate::PlatformDelegate(): cancelled_(false) {
  43 }
  44
  45 FilePathWatcher::PlatformDelegate::~PlatformDelegate() {
  46   DCHECK(is_cancelled());
  47 }
  48
  49 bool FilePathWatcher::Watch(const FilePath& path,
  50                             bool recursive,
  51                             const Callback& callback) {
  52   DCHECK(path.IsAbsolute());
  53   return impl_->Watch(path, recursive, callback);
  54 }
  55
  56 }  // namespace base