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55 lines
1.9 KiB
55 lines
1.9 KiB
//
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// Copyright (C) 2014 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef UPDATE_ENGINE_UPDATE_MANAGER_EVALUATION_CONTEXT_INL_H_
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#define UPDATE_ENGINE_UPDATE_MANAGER_EVALUATION_CONTEXT_INL_H_
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#include <string>
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#include <base/logging.h>
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namespace chromeos_update_manager {
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template <typename T>
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const T* EvaluationContext::GetValue(Variable<T>* var) {
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if (var == nullptr) {
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LOG(ERROR) << "GetValue received an uninitialized variable.";
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return nullptr;
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}
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// Search for the value on the cache first.
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ValueCacheMap::iterator it = value_cache_.find(var);
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if (it != value_cache_.end())
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return reinterpret_cast<const T*>(it->second.value());
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// Get the value from the variable if not found on the cache.
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std::string errmsg;
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const T* result =
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var->GetValue(RemainingTime(evaluation_monotonic_deadline_), &errmsg);
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if (result == nullptr && !var->IsMissingOk()) {
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LOG(WARNING) << "Error reading Variable " << var->GetName() << ": \""
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<< errmsg << "\"";
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}
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// Cache the value for the next time. The map of CachedValues keeps the
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// ownership of the pointer until the map is destroyed.
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value_cache_.emplace(static_cast<BaseVariable*>(var), BoxedValue(result));
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return result;
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}
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} // namespace chromeos_update_manager
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#endif // UPDATE_ENGINE_UPDATE_MANAGER_EVALUATION_CONTEXT_INL_H_
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