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61 lines
1.7 KiB
61 lines
1.7 KiB
/**
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* Copyright 2019-2020 Huawei Technologies Co., Ltd
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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 INC_FRAMEWORK_COMMON_SCOPE_GUARD_H_
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#define INC_FRAMEWORK_COMMON_SCOPE_GUARD_H_
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#include <functional>
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#include <iostream>
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/// Usage:
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/// Acquire Resource 1
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/// MAKE_GUARD([&] { Release Resource 1 })
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/// Acquire Resource 2
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// MAKE_GUARD([&] { Release Resource 2 })
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#define GE_MAKE_GUARD(var, callback) ScopeGuard make_guard_##var(callback)
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#define GE_DISMISS_GUARD(var) make_guard_##var.Dismiss()
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namespace ge {
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class ScopeGuard {
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public:
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// Noncopyable
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ScopeGuard(ScopeGuard const &) = delete;
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ScopeGuard &operator=(ScopeGuard const &) = delete;
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explicit ScopeGuard(const std::function<void()> &on_exit_scope) : on_exit_scope_(on_exit_scope), dismissed_(false) {}
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~ScopeGuard() {
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if (!dismissed_) {
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if (on_exit_scope_ != nullptr) {
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try {
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on_exit_scope_();
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} catch (std::bad_function_call &e) {
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} catch (...) {
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}
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}
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}
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}
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void Dismiss() { dismissed_ = true; }
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private:
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std::function<void()> on_exit_scope_;
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bool dismissed_;
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};
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} // namespace ge
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#endif // INC_FRAMEWORK_COMMON_SCOPE_GUARD_H_
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