| // |
| // Copyright (C) 2014 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| #ifndef SHILL_DBUS_NAME_WATCHER_H_ |
| #define SHILL_DBUS_NAME_WATCHER_H_ |
| |
| #include <string> |
| |
| #include <base/callback.h> |
| #include <base/macros.h> |
| #include <base/memory/weak_ptr.h> |
| |
| namespace shill { |
| |
| class DBusManager; |
| |
| class DBusNameWatcher : public base::SupportsWeakPtr<DBusNameWatcher> { |
| public: |
| typedef base::Callback<void(const std::string& name, |
| const std::string& owner)> NameAppearedCallback; |
| typedef base::Callback<void(const std::string& name)> NameVanishedCallback; |
| |
| // Constructs a watcher to monitor a given DBus service |name|. When the |
| // service appears, |name_appeared_callback| is invoked if non-null. When the |
| // service vanishes, |name_vanished_callback| is invoked if non-null. At |
| // construction, it registers to a DBus manager |dbus_manager| in order to |
| // receive notifications when |name| appears on or vanishes from DBus. At |
| // desctruction, it dereigisters from |dbus_manager|. |
| DBusNameWatcher(DBusManager* dbus_manager, |
| const std::string& name, |
| const NameAppearedCallback& name_appeared_callback, |
| const NameVanishedCallback& name_vanished_callback); |
| ~DBusNameWatcher(); |
| |
| // Called by |dbus_manager_| when |name_| appears on or vanishes from DBus. |
| // |name_appeared_callback_| or |name_vanished_callback_| is invoked |
| // accordingly if non-null. |
| void OnNameOwnerChanged(const std::string& name) const; |
| |
| const std::string& name() const { return name_; } |
| |
| private: |
| base::WeakPtr<DBusManager> dbus_manager_; |
| std::string name_; |
| NameAppearedCallback name_appeared_callback_; |
| NameVanishedCallback name_vanished_callback_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DBusNameWatcher); |
| }; |
| |
| } // namespace shill |
| |
| #endif // SHILL_DBUS_NAME_WATCHER_H_ |