| // |
| // Copyright (C) 2014 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| #ifndef UPDATE_ENGINE_UPDATE_MANAGER_POLICY_UTILS_H_ |
| #define UPDATE_ENGINE_UPDATE_MANAGER_POLICY_UTILS_H_ |
| |
| #include "update_engine/update_manager/policy.h" |
| |
| // Checks that the passed pointer value is not null, returning kFailed on the |
| // current context and setting the *error description when it is null. The |
| // intended use is to validate variable failures while using |
| // EvaluationContext::GetValue, for example: |
| // |
| // const int* my_value = ec->GetValue(state->my_provider()->var_my_value()); |
| // POLICY_CHECK_VALUE_AND_FAIL(my_value, error); |
| // |
| #define POLICY_CHECK_VALUE_AND_FAIL(ptr, error) \ |
| do { \ |
| if ((ptr) == nullptr) { \ |
| *(error) = #ptr " is required but is null."; \ |
| return EvalStatus::kFailed; \ |
| } \ |
| } while (false) |
| |
| #endif // UPDATE_ENGINE_UPDATE_MANAGER_POLICY_UTILS_H_ |
