| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/metrics/field_trial_param_associator.h" |
| |
| #include "base/metrics/field_trial.h" |
| |
| namespace base { |
| |
| FieldTrialParamAssociator::FieldTrialParamAssociator() {} |
| FieldTrialParamAssociator::~FieldTrialParamAssociator() {} |
| |
| // static |
| FieldTrialParamAssociator* FieldTrialParamAssociator::GetInstance() { |
| return Singleton<FieldTrialParamAssociator, |
| LeakySingletonTraits<FieldTrialParamAssociator>>::get(); |
| } |
| |
| bool FieldTrialParamAssociator::AssociateFieldTrialParams( |
| const std::string& trial_name, |
| const std::string& group_name, |
| const FieldTrialParams& params) { |
| AutoLock scoped_lock(lock_); |
| |
| if (FieldTrialList::IsTrialActive(trial_name)) |
| return false; |
| |
| const FieldTrialKey key(trial_name, group_name); |
| if (ContainsKey(field_trial_params_, key)) |
| return false; |
| |
| field_trial_params_[key] = params; |
| return true; |
| } |
| |
| bool FieldTrialParamAssociator::GetFieldTrialParams( |
| const std::string& trial_name, |
| FieldTrialParams* params) { |
| AutoLock scoped_lock(lock_); |
| |
| const std::string group_name = FieldTrialList::FindFullName(trial_name); |
| const FieldTrialKey key(trial_name, group_name); |
| if (!ContainsKey(field_trial_params_, key)) |
| return false; |
| |
| *params = field_trial_params_[key]; |
| return true; |
| } |
| |
| void FieldTrialParamAssociator::ClearAllParamsForTesting() { |
| AutoLock scoped_lock(lock_); |
| field_trial_params_.clear(); |
| } |
| |
| } // namespace base |