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_POLICY_UTILS_H_ 18 #define UPDATE_ENGINE_UPDATE_MANAGER_POLICY_UTILS_H_ 19 20 #include "update_engine/update_manager/policy.h" 21 22 // Checks that the passed pointer value is not null, returning kFailed on the 23 // current context and setting the *error description when it is null. The 24 // intended use is to validate variable failures while using 25 // EvaluationContext::GetValue, for example: 26 // 27 // const int* my_value = ec->GetValue(state->my_provider()->var_my_value()); 28 // POLICY_CHECK_VALUE_AND_FAIL(my_value, error); 29 // 30 #define POLICY_CHECK_VALUE_AND_FAIL(ptr, error) \ 31 do { \ 32 if ((ptr) == nullptr) { \ 33 *(error) = #ptr " is required but is null."; \ 34 return EvalStatus::kFailed; \ 35 } \ 36 } while (false) 37 38 #endif // UPDATE_ENGINE_UPDATE_MANAGER_POLICY_UTILS_H_ 39
