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Side by Side Diff: base/metrics/sparse_histogram.h

Issue 1880803003: Display histograms from subprocesses in chrome://histograms (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: rebased Created 4 years, 8 months ago
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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 #ifndef BASE_METRICS_SPARSE_HISTOGRAM_H_ 5 #ifndef BASE_METRICS_SPARSE_HISTOGRAM_H_
6 #define BASE_METRICS_SPARSE_HISTOGRAM_H_ 6 #define BASE_METRICS_SPARSE_HISTOGRAM_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 #include <stdint.h> 9 #include <stdint.h>
10 10
(...skipping 62 matching lines...) Expand 10 before | Expand all | Expand 10 after
73 HistogramType GetHistogramType() const override; 73 HistogramType GetHistogramType() const override;
74 bool HasConstructionArguments(Sample expected_minimum, 74 bool HasConstructionArguments(Sample expected_minimum,
75 Sample expected_maximum, 75 Sample expected_maximum,
76 uint32_t expected_bucket_count) const override; 76 uint32_t expected_bucket_count) const override;
77 void Add(Sample value) override; 77 void Add(Sample value) override;
78 void AddCount(Sample value, int count) override; 78 void AddCount(Sample value, int count) override;
79 void AddSamples(const HistogramSamples& samples) override; 79 void AddSamples(const HistogramSamples& samples) override;
80 bool AddSamplesFromPickle(base::PickleIterator* iter) override; 80 bool AddSamplesFromPickle(base::PickleIterator* iter) override;
81 std::unique_ptr<HistogramSamples> SnapshotSamples() const override; 81 std::unique_ptr<HistogramSamples> SnapshotSamples() const override;
82 std::unique_ptr<HistogramSamples> SnapshotDelta() override; 82 std::unique_ptr<HistogramSamples> SnapshotDelta() override;
83 void WriteHTMLGraph(std::string* output) const override; 83 void WriteHTMLGraph(const HistogramSamples* snapshot,
84 void WriteAscii(std::string* output) const override; 84 std::string* output) const override;
85 void WriteAscii(const HistogramSamples* snapshot,
86 std::string* output) const override;
85 87
86 protected: 88 protected:
87 // HistogramBase implementation: 89 // HistogramBase implementation:
88 bool SerializeInfoImpl(base::Pickle* pickle) const override; 90 bool SerializeInfoImpl(base::Pickle* pickle) const override;
89 91
90 private: 92 private:
91 // Clients should always use FactoryGet to create SparseHistogram. 93 // Clients should always use FactoryGet to create SparseHistogram.
92 explicit SparseHistogram(const std::string& name); 94 explicit SparseHistogram(const std::string& name);
93 95
94 SparseHistogram(PersistentMemoryAllocator* allocator, 96 SparseHistogram(PersistentMemoryAllocator* allocator,
95 const std::string& name, 97 const std::string& name,
96 HistogramSamples::Metadata* meta, 98 HistogramSamples::Metadata* meta,
97 HistogramSamples::Metadata* logged_meta); 99 HistogramSamples::Metadata* logged_meta);
98 100
99 friend BASE_EXPORT HistogramBase* DeserializeHistogramInfo( 101 friend BASE_EXPORT HistogramBase* DeserializeHistogramInfo(
100 base::PickleIterator* iter); 102 base::PickleIterator* iter);
101 static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter); 103 static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);
102 104
103 void GetParameters(DictionaryValue* params) const override; 105 void GetParameters(DictionaryValue* params) const override;
104 void GetCountAndBucketData(Count* count, 106 void GetCountAndBucketData(Count* count,
105 int64_t* sum, 107 int64_t* sum,
106 ListValue* buckets) const override; 108 ListValue* buckets) const override;
107 109
108 // Helpers for emitting Ascii graphic. Each method appends data to output. 110 // Helpers for emitting Ascii graphic. Each method appends data to output.
109 void WriteAsciiImpl(bool graph_it, 111 void WriteAsciiImpl(bool graph_it,
110 const std::string& newline, 112 const std::string& newline,
113 const HistogramSamples* snapshot,
111 std::string* output) const; 114 std::string* output) const;
112 115
113 // Write a common header message describing this histogram. 116 // Write a common header message describing this histogram.
114 void WriteAsciiHeader(const Count total_count, 117 void WriteAsciiHeader(const Count total_count,
115 std::string* output) const; 118 std::string* output) const;
116 119
117 // For constuctor calling. 120 // For constuctor calling.
118 friend class SparseHistogramTest; 121 friend class SparseHistogramTest;
119 122
120 // Protects access to |samples_|. 123 // Protects access to |samples_|.
121 mutable base::Lock lock_; 124 mutable base::Lock lock_;
122 125
123 std::unique_ptr<HistogramSamples> samples_; 126 std::unique_ptr<HistogramSamples> samples_;
124 std::unique_ptr<HistogramSamples> logged_samples_; 127 std::unique_ptr<HistogramSamples> logged_samples_;
125 128
126 DISALLOW_COPY_AND_ASSIGN(SparseHistogram); 129 DISALLOW_COPY_AND_ASSIGN(SparseHistogram);
127 }; 130 };
128 131
129 } // namespace base 132 } // namespace base
130 133
131 #endif // BASE_METRICS_SPARSE_HISTOGRAM_H_ 134 #endif // BASE_METRICS_SPARSE_HISTOGRAM_H_
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