1 /*
2  * Copyright (C) 2023 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.media.soundtrigger_middleware;
18 
19 /**
20  * Opaque callback for acknowledging oneway events.
21  * Since there is no return channel for oneway events,
22  * passing this interface in a oneway method allows the service to call
23  * back to the client to indicate the event was registered.
24  * This essentially functions like a <code> Future<void> </code> without
25  * an error channel.
26  * {@hide}
27  */
28 oneway interface IAcknowledgeEvent {
29     /**
30      * Acknowledge that the event has been received.
31      */
eventReceived()32     void eventReceived();
33 
34 }
35