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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Histogram is an object that aggregates statistics, and can summarize them in | 5 // Histogram is an object that aggregates statistics, and can summarize them in |
6 // various forms, including ASCII graphical, HTML, and numerically (as a | 6 // various forms, including ASCII graphical, HTML, and numerically (as a |
7 // vector of numbers corresponding to each of the aggregating buckets). | 7 // vector of numbers corresponding to each of the aggregating buckets). |
8 | 8 |
9 // It supports calls to accumulate either time intervals (which are processed | 9 // It supports calls to accumulate either time intervals (which are processed |
10 // as integral number of milliseconds), or arbitrary integral units. | 10 // as integral number of milliseconds), or arbitrary integral units. |
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30 | 30 |
31 #ifndef BASE_METRICS_HISTOGRAM_H_ | 31 #ifndef BASE_METRICS_HISTOGRAM_H_ |
32 #define BASE_METRICS_HISTOGRAM_H_ | 32 #define BASE_METRICS_HISTOGRAM_H_ |
33 #pragma once | 33 #pragma once |
34 | 34 |
35 #include <map> | 35 #include <map> |
36 #include <string> | 36 #include <string> |
37 #include <vector> | 37 #include <vector> |
38 | 38 |
39 #include "base/gtest_prod_util.h" | 39 #include "base/gtest_prod_util.h" |
40 #include "base/ref_counted.h" | |
41 #include "base/logging.h" | 40 #include "base/logging.h" |
| 41 #include "base/memory/ref_counted.h" |
42 #include "base/time.h" | 42 #include "base/time.h" |
43 | 43 |
44 class Pickle; | 44 class Pickle; |
45 | 45 |
46 namespace base { | 46 namespace base { |
47 | 47 |
48 class Lock; | 48 class Lock; |
49 | 49 |
50 //------------------------------------------------------------------------------ | 50 //------------------------------------------------------------------------------ |
51 // Provide easy general purpose histogram in a macro, just like stats counters. | 51 // Provide easy general purpose histogram in a macro, just like stats counters. |
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698 | 698 |
699 // Dump all known histograms to log. | 699 // Dump all known histograms to log. |
700 static bool dump_on_exit_; | 700 static bool dump_on_exit_; |
701 | 701 |
702 DISALLOW_COPY_AND_ASSIGN(StatisticsRecorder); | 702 DISALLOW_COPY_AND_ASSIGN(StatisticsRecorder); |
703 }; | 703 }; |
704 | 704 |
705 } // namespace base | 705 } // namespace base |
706 | 706 |
707 #endif // BASE_METRICS_HISTOGRAM_H_ | 707 #endif // BASE_METRICS_HISTOGRAM_H_ |
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