1 /* 2 * Copyright (C) 2024 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 SRC_TRACING_SERVICE_RANDOM_H_ 18 #define SRC_TRACING_SERVICE_RANDOM_H_ 19 20 #include <random> 21 22 namespace perfetto::tracing_service { 23 24 class Random { 25 public: 26 virtual ~Random(); 27 virtual double GetValue() = 0; 28 }; 29 30 class RandomImpl : public Random { 31 public: 32 explicit RandomImpl(uint32_t seed); 33 ~RandomImpl() override; 34 double GetValue() override; 35 36 private: 37 std::minstd_rand prng_; 38 std::uniform_real_distribution<double> dist_; 39 }; 40 41 } // namespace perfetto::tracing_service 42 43 #endif // SRC_TRACING_SERVICE_RANDOM_H_ 44