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_BIGTRACE_ORCHESTRATOR_TRACE_ADDRESS_POOL_H_ 18 #define SRC_BIGTRACE_ORCHESTRATOR_TRACE_ADDRESS_POOL_H_ 19 20 #include <mutex> 21 #include <optional> 22 #include <vector> 23 24 namespace perfetto::bigtrace { 25 26 // This pool contains all trace addresses of a given query and facilitates a 27 // thread safe way of popping traces and returning them to the pool if the query 28 // is cancelled 29 class TraceAddressPool { 30 public: 31 explicit TraceAddressPool(const std::vector<std::string>& trace_addresses); 32 std::optional<std::string> Pop(); 33 void MarkCancelled(std::string trace_address); 34 uint32_t RemainingCount(); 35 36 private: 37 std::vector<std::string> trace_addresses_; 38 std::mutex trace_addresses_lock_; 39 uint32_t running_queries_ = 0; 40 }; 41 42 } // namespace perfetto::bigtrace 43 44 #endif // SRC_BIGTRACE_ORCHESTRATOR_TRACE_ADDRESS_POOL_H_ 45