| // Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef PLUGIN_METRICS_STOPWATCH_H_ |
| #define PLUGIN_METRICS_STOPWATCH_H_ |
| |
| #include <string> |
| #include <base/basictypes.h> |
| #include <base/memory/scoped_ptr.h> |
| #include <metrics/metrics_library.h> |
| |
| class MetricsStopwatch { |
| public: |
| MetricsStopwatch(const char* name, int min, int max, int nbuckets); |
| |
| void Start(); |
| void Stop(); // and send measurement to UMA and reset |
| void StopIfStarted(); // and send measurement to UMA and reset |
| |
| // In some situations, we can receive a report of the start time |
| // after the stop time. These report when both start and stop are |
| // known. |
| void SetStart(unsigned long long start); |
| void SetStop(unsigned long long stop); |
| |
| void Reset(); // Only call this to abandon a measurement; Stop*() |
| // and Set*() already call this automatically. |
| |
| static unsigned long long GetTimeMs(void); |
| |
| void SetMetrics(MetricsLibraryInterface *m); |
| protected: |
| void ReportAndReset(); |
| |
| scoped_ptr<MetricsLibraryInterface> metrics_; |
| std::string name_; |
| int min_; |
| int max_; |
| int nbuckets_; |
| unsigned long long start_; |
| unsigned long long stop_; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(MetricsStopwatch); |
| }; |
| |
| #endif // PLUGIN_METRICS_STOPWATCH_H_ |