1 // Copyright 2021 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://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, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include "pw_containers/intrusive_list.h" 17 18 namespace pw::log_sink { 19 20 class Sink : public IntrusiveList<Sink>::Item { 21 public: 22 // Provides an entry to the sink (e.g. an encoded protobuf). 23 virtual void HandleEntry(ConstByteSpan entry) = 0; 24 // Informs the sink of an entry that was dropped. This is used to indicate 25 // to the sink that it will produce gaps in outgoing entries. 26 virtual void HandleDropped(size_t count = 1) = 0; 27 28 virtual ~Sink() = default; 29 }; 30 31 } // namespace pw::log_sink 32