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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_HISTOGRAM_BASE_H_ | 5 #ifndef BASE_METRICS_HISTOGRAM_BASE_H_ |
6 #define BASE_METRICS_HISTOGRAM_BASE_H_ | 6 #define BASE_METRICS_HISTOGRAM_BASE_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <string> | 10 #include <string> |
11 #include <vector> | 11 #include <vector> |
12 | 12 |
13 #include "base/atomicops.h" | 13 #include "base/atomicops.h" |
14 #include "base/base_export.h" | 14 #include "base/base_export.h" |
15 #include "base/basictypes.h" | 15 #include "base/basictypes.h" |
16 #include "base/memory/scoped_ptr.h" | 16 #include "base/memory/scoped_ptr.h" |
17 #include "base/strings/string_piece.h" | 17 #include "base/strings/string_piece.h" |
18 #include "base/time/time.h" | 18 #include "base/time/time.h" |
19 | 19 |
20 namespace base { | 20 namespace base { |
21 | 21 |
| 22 class BucketRanges; |
22 class DictionaryValue; | 23 class DictionaryValue; |
23 class HistogramBase; | 24 class HistogramBase; |
24 class HistogramSamples; | 25 class HistogramSamples; |
25 class ListValue; | 26 class ListValue; |
26 class Pickle; | 27 class Pickle; |
27 class PickleIterator; | 28 class PickleIterator; |
28 | 29 |
29 //////////////////////////////////////////////////////////////////////////////// | 30 //////////////////////////////////////////////////////////////////////////////// |
30 // These enums are used to facilitate deserialization of histograms from other | 31 // These enums are used to facilitate deserialization of histograms from other |
31 // processes into the browser. If you create another class that inherits from | 32 // processes into the browser. If you create another class that inherits from |
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72 // aggregation should not take place (as we would be aggregating back into | 73 // aggregation should not take place (as we would be aggregating back into |
73 // the source histogram!). | 74 // the source histogram!). |
74 kIPCSerializationSourceFlag = 0x10, | 75 kIPCSerializationSourceFlag = 0x10, |
75 | 76 |
76 // Indicates that a callback exists for when a new sample is recorded on | 77 // Indicates that a callback exists for when a new sample is recorded on |
77 // this histogram. We store this as a flag with the histogram since | 78 // this histogram. We store this as a flag with the histogram since |
78 // histograms can be in performance critical code, and this allows us | 79 // histograms can be in performance critical code, and this allows us |
79 // to shortcut looking up the callback if it doesn't exist. | 80 // to shortcut looking up the callback if it doesn't exist. |
80 kCallbackExists = 0x20, | 81 kCallbackExists = 0x20, |
81 | 82 |
| 83 // Indicates that the histogram is held in "persistent" memory and may |
| 84 // be accessible between processes. This is only possible if such a |
| 85 // memory segment has been created/attached, used to create a Persistent- |
| 86 // MemoryAllocator, and that loaded into the Histogram module before this |
| 87 // histogram is created. |
| 88 kIsPersistent = 0x40, |
| 89 |
82 // Only for Histogram and its sub classes: fancy bucket-naming support. | 90 // Only for Histogram and its sub classes: fancy bucket-naming support. |
83 kHexRangePrintingFlag = 0x8000, | 91 kHexRangePrintingFlag = 0x8000, |
84 }; | 92 }; |
85 | 93 |
86 // Histogram data inconsistency types. | 94 // Histogram data inconsistency types. |
87 enum Inconsistency { | 95 enum Inconsistency { |
88 NO_INCONSISTENCIES = 0x0, | 96 NO_INCONSISTENCIES = 0x0, |
89 RANGE_CHECKSUM_ERROR = 0x1, | 97 RANGE_CHECKSUM_ERROR = 0x1, |
90 BUCKET_ORDER_ERROR = 0x2, | 98 BUCKET_ORDER_ERROR = 0x2, |
91 COUNT_HIGH_ERROR = 0x4, | 99 COUNT_HIGH_ERROR = 0x4, |
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193 private: | 201 private: |
194 const std::string histogram_name_; | 202 const std::string histogram_name_; |
195 AtomicCount flags_; | 203 AtomicCount flags_; |
196 | 204 |
197 DISALLOW_COPY_AND_ASSIGN(HistogramBase); | 205 DISALLOW_COPY_AND_ASSIGN(HistogramBase); |
198 }; | 206 }; |
199 | 207 |
200 } // namespace base | 208 } // namespace base |
201 | 209 |
202 #endif // BASE_METRICS_HISTOGRAM_BASE_H_ | 210 #endif // BASE_METRICS_HISTOGRAM_BASE_H_ |
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