| // Copyright (c) 2014 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #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_ |
