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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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109 // the StatsTable. They are designed to be lightweight to create and | 109 // the StatsTable. They are designed to be lightweight to create and |
110 // easy to use. | 110 // easy to use. |
111 // | 111 // |
112 // Internally, a counter represents a value in a row of a StatsTable. | 112 // Internally, a counter represents a value in a row of a StatsTable. |
113 // The row has a 32bit value for each process/thread in the table and also | 113 // The row has a 32bit value for each process/thread in the table and also |
114 // a name (stored in the table metadata). Since the storage location can be | 114 // a name (stored in the table metadata). Since the storage location can be |
115 // thread-specific, this class cannot be shared across threads. | 115 // thread-specific, this class cannot be shared across threads. |
116 class StatsCounter { | 116 class StatsCounter { |
117 public: | 117 public: |
118 StatsCounter() { } | 118 StatsCounter() { } |
119 explicit StatsCounter(const char* name) | 119 explicit StatsCounter(Isolate* isolate, const char* name) |
120 : name_(name), ptr_(NULL), lookup_done_(false) { } | 120 : isolate_(isolate), name_(name), ptr_(NULL), lookup_done_(false) { } |
121 | 121 |
122 // Sets the counter to a specific value. | 122 // Sets the counter to a specific value. |
123 void Set(int value) { | 123 void Set(int value) { |
124 int* loc = GetPtr(); | 124 int* loc = GetPtr(); |
125 if (loc) *loc = value; | 125 if (loc) *loc = value; |
126 } | 126 } |
127 | 127 |
128 // Increments the counter. | 128 // Increments the counter. |
129 void Increment() { | 129 void Increment() { |
130 int* loc = GetPtr(); | 130 int* loc = GetPtr(); |
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168 int* GetPtr() { | 168 int* GetPtr() { |
169 if (lookup_done_) return ptr_; | 169 if (lookup_done_) return ptr_; |
170 lookup_done_ = true; | 170 lookup_done_ = true; |
171 ptr_ = FindLocationInStatsTable(); | 171 ptr_ = FindLocationInStatsTable(); |
172 return ptr_; | 172 return ptr_; |
173 } | 173 } |
174 | 174 |
175 private: | 175 private: |
176 int* FindLocationInStatsTable() const; | 176 int* FindLocationInStatsTable() const; |
177 | 177 |
| 178 Isolate* isolate_; |
178 const char* name_; | 179 const char* name_; |
179 int* ptr_; | 180 int* ptr_; |
180 bool lookup_done_; | 181 bool lookup_done_; |
181 }; | 182 }; |
182 | 183 |
183 // A Histogram represents a dynamically created histogram in the StatsTable. | 184 // A Histogram represents a dynamically created histogram in the StatsTable. |
184 // It will be registered with the histogram system on first use. | 185 // It will be registered with the histogram system on first use. |
185 class Histogram { | 186 class Histogram { |
186 public: | 187 public: |
187 Histogram() { } | 188 Histogram() { } |
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273 timer_->Stop(); | 274 timer_->Stop(); |
274 } | 275 } |
275 private: | 276 private: |
276 HistogramTimer* timer_; | 277 HistogramTimer* timer_; |
277 }; | 278 }; |
278 | 279 |
279 | 280 |
280 } } // namespace v8::internal | 281 } } // namespace v8::internal |
281 | 282 |
282 #endif // V8_COUNTERS_H_ | 283 #endif // V8_COUNTERS_H_ |
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