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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 #include "base/metrics/field_trial.h" | 5 #include "base/metrics/field_trial.h" |
| 6 | 6 |
| 7 #include "base/logging.h" | 7 #include "base/logging.h" |
| 8 #include "base/rand_util.h" | 8 #include "base/rand_util.h" |
| 9 #include "base/stringprintf.h" | 9 #include "base/stringprintf.h" |
| 10 | 10 |
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| 110 register_without_global_ = true; | 110 register_without_global_ = true; |
| 111 return; | 111 return; |
| 112 } | 112 } |
| 113 AutoLock auto_lock(global_->lock_); | 113 AutoLock auto_lock(global_->lock_); |
| 114 DCHECK(!global_->PreLockedFind(trial->name())); | 114 DCHECK(!global_->PreLockedFind(trial->name())); |
| 115 trial->AddRef(); | 115 trial->AddRef(); |
| 116 global_->registered_[trial->name()] = trial; | 116 global_->registered_[trial->name()] = trial; |
| 117 } | 117 } |
| 118 | 118 |
| 119 // static | 119 // static |
| 120 FieldTrial* FieldTrialList::Find(const std::string& name) { |
| 121 if (!global_) |
| 122 return NULL; |
| 123 AutoLock auto_lock(global_->lock_); |
| 124 return global_->PreLockedFind(name); |
| 125 } |
| 126 |
| 127 // static |
| 120 int FieldTrialList::FindValue(const std::string& name) { | 128 int FieldTrialList::FindValue(const std::string& name) { |
| 121 FieldTrial* field_trial = Find(name); | 129 FieldTrial* field_trial = Find(name); |
| 122 if (field_trial) | 130 if (field_trial) |
| 123 return field_trial->group(); | 131 return field_trial->group(); |
| 124 return FieldTrial::kNotParticipating; | 132 return FieldTrial::kNotParticipating; |
| 125 } | 133 } |
| 126 | 134 |
| 127 // static | 135 // static |
| 128 std::string FieldTrialList::FindFullName(const std::string& name) { | 136 std::string FieldTrialList::FindFullName(const std::string& name) { |
| 129 FieldTrial* field_trial = Find(name); | 137 FieldTrial* field_trial = Find(name); |
| 130 if (field_trial) | 138 if (field_trial) |
| 131 return field_trial->group_name(); | 139 return field_trial->group_name(); |
| 132 return ""; | 140 return ""; |
| 133 } | 141 } |
| 134 | 142 |
| 135 // static | 143 // static |
| 136 FieldTrial* FieldTrialList::Find(const std::string& name) { | |
| 137 if (!global_) | |
| 138 return NULL; | |
| 139 AutoLock auto_lock(global_->lock_); | |
| 140 return global_->PreLockedFind(name); | |
| 141 } | |
| 142 | |
| 143 FieldTrial* FieldTrialList::PreLockedFind(const std::string& name) { | |
| 144 RegistrationList::iterator it = registered_.find(name); | |
| 145 if (registered_.end() == it) | |
| 146 return NULL; | |
| 147 return it->second; | |
| 148 } | |
| 149 | |
| 150 // static | |
| 151 void FieldTrialList::StatesToString(std::string* output) { | 144 void FieldTrialList::StatesToString(std::string* output) { |
| 152 if (!global_) | 145 if (!global_) |
| 153 return; | 146 return; |
| 154 DCHECK(output->empty()); | 147 DCHECK(output->empty()); |
| 155 AutoLock auto_lock(global_->lock_); | 148 AutoLock auto_lock(global_->lock_); |
| 156 for (RegistrationList::iterator it = global_->registered_.begin(); | 149 for (RegistrationList::iterator it = global_->registered_.begin(); |
| 157 it != global_->registered_.end(); ++it) { | 150 it != global_->registered_.end(); ++it) { |
| 158 const std::string name = it->first; | 151 const std::string name = it->first; |
| 159 const std::string group_name = it->second->group_name(); | 152 const std::string group_name = it->second->group_name(); |
| 160 if (group_name.empty()) | 153 if (group_name.empty()) |
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| 203 } | 196 } |
| 204 | 197 |
| 205 // static | 198 // static |
| 206 size_t FieldTrialList::GetFieldTrialCount() { | 199 size_t FieldTrialList::GetFieldTrialCount() { |
| 207 if (!global_) | 200 if (!global_) |
| 208 return 0; | 201 return 0; |
| 209 AutoLock auto_lock(global_->lock_); | 202 AutoLock auto_lock(global_->lock_); |
| 210 return global_->registered_.size(); | 203 return global_->registered_.size(); |
| 211 } | 204 } |
| 212 | 205 |
| 206 FieldTrial* FieldTrialList::PreLockedFind(const std::string& name) { |
| 207 RegistrationList::iterator it = registered_.find(name); |
| 208 if (registered_.end() == it) |
| 209 return NULL; |
| 210 return it->second; |
| 211 } |
| 212 |
| 213 } // namespace base | 213 } // namespace base |
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