blob: 21c8ec904050f5e10f39a837f173774259a0f3c3 [file] [log] [blame]
/*
*
* Copyright (c) 2021 Project CHIP Authors
* All rights reserved.
*
* 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.
*/
#pragma once
#include <utility>
template <typename Function>
class Defer
{
public:
Defer(Function && function) : mFunction(std::move(function)) {}
~Defer() { mFunction(); }
Defer(Defer & that) = default;
Defer & operator=(Defer & that) = default;
Defer(Defer && that) = default;
Defer & operator=(Defer && that) = default;
private:
Function mFunction;
};
/**
* @brief
* Defers the execution of a function until the surrounding function returns.
* Create a Defer object holding a lambda:
*
* auto deferred = MakeDefer([]() { -- do cleanup -- });
*
* The lambda will be called as soon as the object goes out of scope.
*/
template <typename Function>
Defer<Function> MakeDefer(Function && function)
{
return Defer<Function>(std::forward<Function>(function));
}