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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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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70 #include "base/atomicops.h" | 70 #include "base/atomicops.h" |
71 #include "base/base_export.h" | 71 #include "base/base_export.h" |
72 #include "base/basictypes.h" | 72 #include "base/basictypes.h" |
73 #include "base/compiler_specific.h" | 73 #include "base/compiler_specific.h" |
74 #include "base/gtest_prod_util.h" | 74 #include "base/gtest_prod_util.h" |
75 #include "base/logging.h" | 75 #include "base/logging.h" |
76 #include "base/memory/scoped_ptr.h" | 76 #include "base/memory/scoped_ptr.h" |
77 #include "base/metrics/bucket_ranges.h" | 77 #include "base/metrics/bucket_ranges.h" |
78 #include "base/metrics/histogram_base.h" | 78 #include "base/metrics/histogram_base.h" |
79 #include "base/metrics/histogram_samples.h" | 79 #include "base/metrics/histogram_samples.h" |
80 #include "base/time.h" | 80 #include "base/time/time.h" |
81 | 81 |
82 class Pickle; | 82 class Pickle; |
83 class PickleIterator; | 83 class PickleIterator; |
84 | 84 |
85 namespace base { | 85 namespace base { |
86 | 86 |
87 class Lock; | 87 class Lock; |
88 //------------------------------------------------------------------------------ | 88 //------------------------------------------------------------------------------ |
89 // Histograms are often put in areas where they are called many many times, and | 89 // Histograms are often put in areas where they are called many many times, and |
90 // performance is critical. As a result, they are designed to have a very low | 90 // performance is critical. As a result, they are designed to have a very low |
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666 static bool ValidateCustomRanges(const std::vector<Sample>& custom_ranges); | 666 static bool ValidateCustomRanges(const std::vector<Sample>& custom_ranges); |
667 static BucketRanges* CreateBucketRangesFromCustomRanges( | 667 static BucketRanges* CreateBucketRangesFromCustomRanges( |
668 const std::vector<Sample>& custom_ranges); | 668 const std::vector<Sample>& custom_ranges); |
669 | 669 |
670 DISALLOW_COPY_AND_ASSIGN(CustomHistogram); | 670 DISALLOW_COPY_AND_ASSIGN(CustomHistogram); |
671 }; | 671 }; |
672 | 672 |
673 } // namespace base | 673 } // namespace base |
674 | 674 |
675 #endif // BASE_METRICS_HISTOGRAM_H_ | 675 #endif // BASE_METRICS_HISTOGRAM_H_ |
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