38 lines
1.4 KiB
C
38 lines
1.4 KiB
C
//
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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_POLICY_UTILS_H_
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#define UPDATE_ENGINE_UPDATE_MANAGER_POLICY_UTILS_H_
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#include "update_engine/update_manager/policy.h"
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// Checks that the passed pointer value is not null, returning kFailed on the
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// current context and setting the *error description when it is null. The
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// intended use is to validate variable failures while using
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// EvaluationContext::GetValue, for example:
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//
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// const int* my_value = ec->GetValue(state->my_provider()->var_my_value());
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// POLICY_CHECK_VALUE_AND_FAIL(my_value, error);
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//
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#define POLICY_CHECK_VALUE_AND_FAIL(ptr, error) \
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do { \
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if ((ptr) == nullptr) { \
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*(error) = #ptr " is required but is null."; \
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return EvalStatus::kFailed; \
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} \
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} while (false)
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#endif // UPDATE_ENGINE_UPDATE_MANAGER_POLICY_UTILS_H_
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