OLD | NEW |
1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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_FEATURE_LIST_H_ | 5 #ifndef BASE_FEATURE_LIST_H_ |
6 #define BASE_FEATURE_LIST_H_ | 6 #define BASE_FEATURE_LIST_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 #include <string> | 9 #include <string> |
10 #include <vector> | 10 #include <vector> |
(...skipping 127 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
138 // Returns whether the given |feature| is enabled. Must only be called after | 138 // Returns whether the given |feature| is enabled. Must only be called after |
139 // the singleton instance has been registered via SetInstance(). Additionally, | 139 // the singleton instance has been registered via SetInstance(). Additionally, |
140 // a feature with a given name must only have a single corresponding Feature | 140 // a feature with a given name must only have a single corresponding Feature |
141 // struct, which is checked in builds with DCHECKs enabled. | 141 // struct, which is checked in builds with DCHECKs enabled. |
142 static bool IsEnabled(const Feature& feature); | 142 static bool IsEnabled(const Feature& feature); |
143 | 143 |
144 // Splits a comma-separated string containing feature names into a vector. | 144 // Splits a comma-separated string containing feature names into a vector. |
145 static std::vector<std::string> SplitFeatureListString( | 145 static std::vector<std::string> SplitFeatureListString( |
146 const std::string& input); | 146 const std::string& input); |
147 | 147 |
148 // Initializes and sets a default instance of FeatureList if one has not yet | 148 // Initializes and sets an instance of FeatureList with feature overrides via |
149 // already been set. No-op otherwise. | 149 // command-line flags |enable_features| and |disable_features| if one has not |
150 static void InitializeInstance(); | 150 // already been set from command-line flags. No-op otherwise. See |
| 151 // InitializeFromCommandLine for more details about |enable_features| and |
| 152 // |disable_features| parameters. |
| 153 static void InitializeInstance(const std::string& enable_features, |
| 154 const std::string& disable_features); |
151 | 155 |
152 // Returns the singleton instance of FeatureList. Will return null until an | 156 // Returns the singleton instance of FeatureList. Will return null until an |
153 // instance is registered via SetInstance(). | 157 // instance is registered via SetInstance(). |
154 static FeatureList* GetInstance(); | 158 static FeatureList* GetInstance(); |
155 | 159 |
156 // Registers the given |instance| to be the singleton feature list for this | 160 // Registers the given |instance| to be the singleton feature list for this |
157 // process. This should only be called once and |instance| must not be null. | 161 // process. This should only be called once and |instance| must not be null. |
158 static void SetInstance(scoped_ptr<FeatureList> instance); | 162 static void SetInstance(scoped_ptr<FeatureList> instance); |
159 | 163 |
160 // Clears the previously-registered singleton instance for tests. | 164 // Clears the previously-registered singleton instance for tests. |
(...skipping 67 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
228 // Locked map that keeps track of seen features, to ensure a single feature is | 232 // Locked map that keeps track of seen features, to ensure a single feature is |
229 // only defined once. This verification is only done in builds with DCHECKs | 233 // only defined once. This verification is only done in builds with DCHECKs |
230 // enabled. | 234 // enabled. |
231 Lock feature_identity_tracker_lock_; | 235 Lock feature_identity_tracker_lock_; |
232 std::map<std::string, const Feature*> feature_identity_tracker_; | 236 std::map<std::string, const Feature*> feature_identity_tracker_; |
233 | 237 |
234 // Whether this object has been fully initialized. This gets set to true as a | 238 // Whether this object has been fully initialized. This gets set to true as a |
235 // result of FinalizeInitialization(). | 239 // result of FinalizeInitialization(). |
236 bool initialized_; | 240 bool initialized_; |
237 | 241 |
| 242 // Whether this object has been initialized from command line. |
| 243 bool initialized_from_command_line_; |
| 244 |
238 DISALLOW_COPY_AND_ASSIGN(FeatureList); | 245 DISALLOW_COPY_AND_ASSIGN(FeatureList); |
239 }; | 246 }; |
240 | 247 |
241 } // namespace base | 248 } // namespace base |
242 | 249 |
243 #endif // BASE_FEATURE_LIST_H_ | 250 #endif // BASE_FEATURE_LIST_H_ |
OLD | NEW |