1 /* 2 * Copyright (C) 2018 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 HARDWARE_GOOGLE_PIXELSTATS_V1_0_RATELIMIT_H 18 #define HARDWARE_GOOGLE_PIXELSTATS_V1_0_RATELIMIT_H 19 20 #include <utils/Timers.h> 21 22 #include <map> 23 #include <mutex> 24 25 namespace hardware { 26 namespace google { 27 namespace pixelstats { 28 namespace V1_0 { 29 namespace implementation { 30 31 class RateLimiter { 32 public: 33 RateLimiter(int overall_limit = 0) { SetOverallDailyLimit(overall_limit); } 34 35 // Returns true if you should rate limit the action reporting, false if not. 36 // limit: the number of times the action can occur within 24hrs. 37 bool RateLimit(int32_t action, int32_t limit); 38 39 // Limit for all actions over a 24hr period. 0 disables overall limit. 40 void SetOverallDailyLimit(int32_t limit); 41 42 // for tests only 43 void TurnBackHours(int32_t hours); 44 45 private: 46 std::mutex lock_; 47 std::map<int, int> counts_; // action -> count of actions in a 24hr window. 48 int32_t overall_count_; 49 int32_t overall_limit_; 50 int64_t nsecs_at_rollover_; 51 }; 52 53 } // namespace implementation 54 } // namespace V1_0 55 } // namespace pixelstats 56 } // namespace google 57 } // namespace hardware 58 59 #endif // HARDWARE_GOOGLE_PIXELSTATS_V1_0_RATELIMIT_H 60 61