1 // Copyright 2014 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 "base/files/file_path_watcher.h" 6 #include "base/files/file_path_watcher_kqueue.h" 7 #include "build/build_config.h" 8 9 #if !defined(OS_IOS) 10 #include "base/files/file_path_watcher_fsevents.h" 11 #endif 12 13 namespace base { 14 15 namespace { 16 17 class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate { 18 public: 19 bool Watch(const FilePath& path, 20 bool recursive, 21 const FilePathWatcher::Callback& callback) override { 22 // Use kqueue for non-recursive watches and FSEvents for recursive ones. 23 DCHECK(!impl_.get()); 24 if (recursive) { 25 if (!FilePathWatcher::RecursiveWatchAvailable()) 26 return false; 27 #if !defined(OS_IOS) 28 impl_ = new FilePathWatcherFSEvents(); 29 #endif // OS_IOS 30 } else { 31 impl_ = new FilePathWatcherKQueue(); 32 } 33 DCHECK(impl_.get()); 34 return impl_->Watch(path, recursive, callback); 35 } 36 37 void Cancel() override { 38 if (impl_.get()) 39 impl_->Cancel(); 40 set_cancelled(); 41 } 42 43 void CancelOnMessageLoopThread() override { 44 if (impl_.get()) 45 impl_->Cancel(); 46 set_cancelled(); 47 } 48 49 protected: 50 ~FilePathWatcherImpl() override {} 51 52 scoped_refptr<PlatformDelegate> impl_; 53 }; 54 55 } // namespace 56 57 FilePathWatcher::FilePathWatcher() { 58 impl_ = new FilePathWatcherImpl(); 59 } 60 61 } // namespace base 62
