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// Copyright 2015 Google Inc. All rights reserved
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef STATS_H_
#define STATS_H_
#include <mutex>
#include <string>
#include <unordered_map>
#include <unordered_set>
using namespace std;
struct StatsDetails {
int cnt_ = 0;
double elapsed_ = 0;
};
class Stats {
public:
explicit Stats(const char* name);
void DumpTop() const;
string String() const;
void MarkInteresting(const string& msg);
private:
double Start();
double End(double start, const char* msg);
friend class ScopedStatsRecorder;
const char* name_;
double elapsed_;
int cnt_;
mutable mutex mu_;
unordered_map<string, StatsDetails> detailed_;
unordered_set<string> interesting_;
};
class ScopedStatsRecorder {
public:
explicit ScopedStatsRecorder(Stats* st, const char* msg = 0);
~ScopedStatsRecorder();
private:
Stats* st_;
const char* msg_;
double start_time_;
};
void ReportAllStats();
#define COLLECT_STATS(name) \
static Stats stats(name); \
ScopedStatsRecorder ssr(&stats)
#define COLLECT_STATS_WITH_SLOW_REPORT(name, msg) \
static Stats stats(name); \
ScopedStatsRecorder ssr(&stats, msg)
#endif // STATS_H_
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