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      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)
     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
     57