1 // Copyright 2015 Google Inc. All rights reserved 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef STATS_H_ 16 #define STATS_H_ 17 18 #include <mutex> 19 #include <string> 20 #include <unordered_map> 21 22 using namespace std; 23 24 class Stats { 25 public: 26 explicit Stats(const char* name); 27 28 void DumpTop() const; 29 string String() const; 30 31 private: 32 void Start(); 33 double End(const char* msg); 34 35 friend class ScopedStatsRecorder; 36 37 const char* name_; 38 double elapsed_; 39 int cnt_; 40 mutable mutex mu_; 41 unordered_map<string, double> detailed_; 42 }; 43 44 class ScopedStatsRecorder { 45 public: 46 explicit ScopedStatsRecorder(Stats* st, const char* msg = 0); 47 ~ScopedStatsRecorder(); 48 49 private: 50 Stats* st_; 51 const char* msg_; 52 }; 53 54 void ReportAllStats(); 55 56 #define COLLECT_STATS(name) \ 57 static Stats stats(name); \ 58 ScopedStatsRecorder ssr(&stats) 59 60 #define COLLECT_STATS_WITH_SLOW_REPORT(name, msg) \ 61 static Stats stats(name); \ 62 ScopedStatsRecorder ssr(&stats, msg) 63 64 #endif // STATS_H_ 65
