kqueue implementation of FilePathWatcher on Mac.

content/common/file_path_watcher/file_path_watcher_win.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/file_path_watcher/file_path_watcher.h"
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop_proxy.h"
 #include "base/time.h"
 #include "base/win/object_watcher.h"
 
 namespace {
 
 class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate,
                             public base::win::ObjectWatcher::Delegate,
                             public MessageLoop::DestructionObserver {
  public:
   FilePathWatcherImpl() : delegate_(NULL), handle_(INVALID_HANDLE_VALUE) {}
 
   // FilePathWatcher::PlatformDelegate overrides.
   virtual bool Watch(const FilePath& path,
-                     FilePathWatcher::Delegate* delegate,
-                     base::MessageLoopProxy* loop) OVERRIDE;
+                     FilePathWatcher::Delegate* delegate) OVERRIDE;
   virtual void Cancel() OVERRIDE;
 
   // Deletion of the FilePathWatcher will call Cancel() to dispose of this
   // object in the right thread. This also observes destruction of the required
   // cleanup thread, in case it quits before Cancel() is called.
   virtual void WillDestroyCurrentMessageLoop() OVERRIDE;
 
   // Callback from MessageLoopForIO.
   virtual void OnObjectSignaled(HANDLE object);
 
@@ skipping 32 matching lines @@
   base::Time last_modified_;
 
   // The time at which we processed the first notification with the
   // |last_modified_| time stamp.
   base::Time first_notification_;
 
   DISALLOW_COPY_AND_ASSIGN(FilePathWatcherImpl);
 };
 
 bool FilePathWatcherImpl::Watch(const FilePath& path,
-                                FilePathWatcher::Delegate* delegate,
-                                base::MessageLoopProxy*) {
+                                FilePathWatcher::Delegate* delegate) {
   DCHECK(target_.value().empty());  // Can only watch one path.
 
   set_message_loop(base::MessageLoopProxy::CreateForCurrentThread());
   delegate_ = delegate;
   target_ = path;
   MessageLoop::current()->AddDestructionObserver(this);
 
   if (!UpdateWatch())
     return false;
 
@@ skipping 33 matching lines @@
 void FilePathWatcherImpl::WillDestroyCurrentMessageLoop() {
   CancelOnMessageLoopThread();
 }
 
 void FilePathWatcherImpl::OnObjectSignaled(HANDLE object) {
   DCHECK(object == handle_);
   // Make sure we stay alive through the body of this function.
   scoped_refptr<FilePathWatcherImpl> keep_alive(this);
 
   if (!UpdateWatch()) {
-    delegate_->OnError();
+    delegate_->OnFilePathError(target_);
     return;
   }
 
   // Check whether the event applies to |target_| and notify the delegate.
   base::PlatformFileInfo file_info;
   bool file_exists = file_util::GetFileInfo(target_, &file_info);
   if (file_exists && (last_modified_.is_null() ||
       last_modified_ != file_info.last_modified)) {
     last_modified_ = file_info.last_modified;
     first_notification_ = base::Time::Now();
@@ skipping 122 matching lines @@
   watcher_.StopWatching();
   FindCloseChangeNotification(handle_);
   handle_ = INVALID_HANDLE_VALUE;
 }
 
 }  // namespace
 
 FilePathWatcher::FilePathWatcher() {
   impl_ = new FilePathWatcherImpl();
 }