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