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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 #include "build/build_config.h"
     13 
     14 #if defined(OS_MACOSX) && !defined(OS_IOS)
     15 #include "base/mac/mac_util.h"
     16 #endif
     17 
     18 namespace base {
     19 
     20 FilePathWatcher::~FilePathWatcher() {
     21   impl_->Cancel();
     22 }
     23 
     24 // static
     25 void FilePathWatcher::CancelWatch(
     26     const scoped_refptr<PlatformDelegate>& delegate) {
     27   delegate->CancelOnMessageLoopThread();
     28 }
     29 
     30 // static
     31 bool FilePathWatcher::RecursiveWatchAvailable() {
     32 #if defined(OS_MACOSX) && !defined(OS_IOS)
     33   // FSEvents isn't available on iOS and is broken on OSX 10.6 and earlier.
     34   // See http://crbug.com/54822#c31
     35   return mac::IsOSLionOrLater();
     36 #elif defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)
     37   return true;
     38 #else
     39   return false;
     40 #endif
     41 }
     42 
     43 FilePathWatcher::PlatformDelegate::PlatformDelegate(): cancelled_(false) {
     44 }
     45 
     46 FilePathWatcher::PlatformDelegate::~PlatformDelegate() {
     47   DCHECK(is_cancelled());
     48 }
     49 
     50 bool FilePathWatcher::Watch(const FilePath& path,
     51                             bool recursive,
     52                             const Callback& callback) {
     53   DCHECK(path.IsAbsolute());
     54   return impl_->Watch(path, recursive, callback);
     55 }
     56 
     57 }  // namespace base
     58