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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef LIBBRILLO_BRILLO_BINDER_WATCHER_H_
     18 #define LIBBRILLO_BRILLO_BINDER_WATCHER_H_
     19 
     20 #include <base/macros.h>
     21 #include <brillo/message_loops/message_loop.h>
     22 
     23 namespace brillo {
     24 
     25 // Bridge between libbinder and brillo::MessageLoop. Construct at startup to
     26 // make the message loop watch for binder events and pass them to libbinder.
     27 class BinderWatcher final {
     28  public:
     29   // Construct the BinderWatcher using the passed |message_loop| if not null or
     30   // the current MessageLoop otherwise.
     31   explicit BinderWatcher(MessageLoop* message_loop);
     32   BinderWatcher();
     33   ~BinderWatcher();
     34 
     35   // Initializes the object, returning true on success.
     36   bool Init();
     37 
     38  private:
     39   MessageLoop::TaskId task_id_{MessageLoop::kTaskIdNull};
     40   MessageLoop* message_loop_;
     41 
     42   DISALLOW_COPY_AND_ASSIGN(BinderWatcher);
     43 };
     44 
     45 }  // namespace brillo
     46 
     47 #endif  // LIBBRILLO_BRILLO_BINDER_WATCHER_H_
     48