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 #include "src/bigtrace/orchestrator/trace_address_pool.h" 18 #include "perfetto/base/logging.h" 19 20 namespace perfetto::bigtrace { 21 TraceAddressPool(const std::vector<std::string> & trace_addresses)22TraceAddressPool::TraceAddressPool( 23 const std::vector<std::string>& trace_addresses) 24 : trace_addresses_(trace_addresses) {} 25 26 // Pops a trace address from the pool, blocking if necessary 27 // 28 // Returns a nullopt if the pool is empty Pop()29std::optional<std::string> TraceAddressPool::Pop() { 30 std::lock_guard<std::mutex> trace_addresses_guard(trace_addresses_lock_); 31 if (trace_addresses_.size() == 0) { 32 return std::nullopt; 33 } 34 std::string trace_address = trace_addresses_.back(); 35 trace_addresses_.pop_back(); 36 running_queries_++; 37 return trace_address; 38 } 39 40 // Marks a trace address as cancelled 41 // 42 // Returns cancelled trace addresses to the pool for future calls to |Pop| MarkCancelled(std::string trace_address)43void TraceAddressPool::MarkCancelled(std::string trace_address) { 44 std::lock_guard<std::mutex> guard(trace_addresses_lock_); 45 PERFETTO_CHECK(running_queries_-- > 0); 46 trace_addresses_.push_back(std::move(trace_address)); 47 } 48 49 // Returns the number of remaining trace addresses which require processing RemainingCount()50uint32_t TraceAddressPool::RemainingCount() { 51 std::lock_guard<std::mutex> guard(trace_addresses_lock_); 52 return static_cast<uint32_t>(trace_addresses_.size()) + running_queries_; 53 } 54 55 } // namespace perfetto::bigtrace 56