1 // Copyright (C) 2023 The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 use super::Buffer; 16 17 /// Trait that represents an owner of a buffer that might need to handle events such as a buffer 18 /// being dropped. 19 pub trait BufferOwner: Send + Sync { 20 /// Called when a buffer is dropped. on_return(&self, buffer: &Buffer)21 fn on_return(&self, buffer: &Buffer); 22 } 23 24 pub(super) struct NoBufferOwner; 25 26 impl BufferOwner for NoBufferOwner { on_return(&self, _buffer: &Buffer)27 fn on_return(&self, _buffer: &Buffer) {} 28 } 29