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      1 /*
      2  * Copyright (C) 2016 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 package android.os;
     18 
     19 import android.annotation.SystemApi;
     20 import android.annotation.TestApi;
     21 
     22 /** @hide */
     23 @SystemApi
     24 @TestApi
     25 public interface IHwBinder {
     26     /**
     27      * Process a hwbinder transaction.
     28      *
     29      * @param code interface specific code for interface.
     30      * @param request parceled transaction
     31      * @param reply object to parcel reply into
     32      * @param flags transaction flags to be chosen by wire protocol
     33      */
     34     public void transact(
     35             int code, HwParcel request, HwParcel reply, int flags)
     36         throws RemoteException;
     37 
     38     /**
     39      * Return as IHwInterface instance only if this implements descriptor.
     40      *
     41      * @param descriptor for example foo.bar (at) 1.0::IBaz
     42      */
     43     public IHwInterface queryLocalInterface(String descriptor);
     44 
     45     /**
     46      * Interface for receiving a callback when the process hosting a service
     47      * has gone away.
     48      */
     49     public interface DeathRecipient {
     50         /**
     51          * Callback for a registered process dying.
     52          *
     53          * @param cookie cookie this death recipient was registered with.
     54          */
     55         public void serviceDied(long cookie);
     56     }
     57 
     58     /**
     59      * Notifies the death recipient with the cookie when the process containing
     60      * this binder dies.
     61      *
     62      * @param recipient callback object to be called on object death.
     63      * @param cookie value to be given to callback on object death.
     64      */
     65     public boolean linkToDeath(DeathRecipient recipient, long cookie);
     66     /**
     67      * Unregisters the death recipient from this binder.
     68      *
     69      * @param recipient callback to no longer recieve death notifications on this binder.
     70      */
     71     public boolean unlinkToDeath(DeathRecipient recipient);
     72 }
     73