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 #ifndef NETD_SERVER_EVENT_REPORTER_H 18 #define NETD_SERVER_EVENT_REPORTER_H 19 20 #include <atomic> 21 #include <binder/IServiceManager.h> 22 #include <mutex> 23 24 #include "android/net/metrics/INetdEventListener.h" 25 26 /* 27 * This class stores the reporting level and can be used to get the event listener service. 28 */ 29 class EventReporter { 30 public: 31 int setMetricsReportingLevel(const int level); 32 int getMetricsReportingLevel() const; 33 34 // Returns the binder reference to the netd events listener service, attempting to fetch it if 35 // we do not have it already. This method is threadsafe. 36 android::sp<android::net::metrics::INetdEventListener> getNetdEventListener(); 37 38 private: 39 std::atomic_int mReportingLevel{ 40 android::net::metrics::INetdEventListener::REPORTING_LEVEL_FULL}; 41 // TODO: consider changing this into an atomic type such as 42 // std::atomic<android::net::metrics::INetdEventListener> and deleting the mutex. 43 // 44 // Alternatively, if this locking causes a performance penalty, have each single-threaded 45 // caller (DnsProxyListener, FwmarkServer) keep their own per-thread copy of NetdEventListener 46 // and remove mNetdEventListener entirely. 47 android::sp<android::net::metrics::INetdEventListener> mNetdEventListener; 48 std::mutex mutex; 49 50 }; 51 52 #endif // NETD_SERVER_EVENT_REPORTER_H 53
