1 // 2 // Copyright (C) 2014 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #ifndef UPDATE_ENGINE_UPDATE_MANAGER_EVALUATION_CONTEXT_INL_H_ 18 #define UPDATE_ENGINE_UPDATE_MANAGER_EVALUATION_CONTEXT_INL_H_ 19 20 #include <string> 21 22 #include <base/logging.h> 23 24 namespace chromeos_update_manager { 25 26 template<typename T> 27 const T* EvaluationContext::GetValue(Variable<T>* var) { 28 if (var == nullptr) { 29 LOG(ERROR) << "GetValue received an uninitialized variable."; 30 return nullptr; 31 } 32 33 // Search for the value on the cache first. 34 ValueCacheMap::iterator it = value_cache_.find(var); 35 if (it != value_cache_.end()) 36 return reinterpret_cast<const T*>(it->second.value()); 37 38 // Get the value from the variable if not found on the cache. 39 std::string errmsg; 40 const T* result = var->GetValue(RemainingTime(evaluation_monotonic_deadline_), 41 &errmsg); 42 if (result == nullptr) { 43 LOG(WARNING) << "Error reading Variable " << var->GetName() << ": \"" 44 << errmsg << "\""; 45 } 46 // Cache the value for the next time. The map of CachedValues keeps the 47 // ownership of the pointer until the map is destroyed. 48 value_cache_.emplace( 49 static_cast<BaseVariable*>(var), BoxedValue(result)); 50 return result; 51 } 52 53 } // namespace chromeos_update_manager 54 55 #endif // UPDATE_ENGINE_UPDATE_MANAGER_EVALUATION_CONTEXT_INL_H_ 56
