1 /* 2 * Copyright (C) 2021 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 #pragma once 18 19 #include <cstdint> 20 #include <optional> 21 #include <string> 22 23 namespace android { 24 // Manages flags for SurfaceFlinger, including default values, system properties, and Mendel 25 // experiment configuration values. 26 class FlagManager { 27 public: 28 FlagManager() = default; 29 virtual ~FlagManager(); 30 void dump(std::string& result) const; 31 32 int64_t demo_flag() const; 33 34 bool use_adpf_cpu_hint() const; 35 36 bool use_skia_tracing() const; 37 38 private: 39 friend class FlagManagerTest; 40 41 // Wrapper for mocking in test. 42 virtual std::string getServerConfigurableFlag(const std::string& experimentFlagName) const; 43 44 template <typename T> 45 T getValue(const std::string& experimentFlagName, std::optional<T> systemPropertyOpt, 46 T defaultValue) const; 47 }; 48 } // namespace android 49