Robin Davies
65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
// Copyright (c) 2022 Robin Davies
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#pragma once
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template <typename FUNC>
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class deferred_call
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{
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private:
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deferred_call(const deferred_call& other) = delete;
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deferred_call& operator=(const deferred_call& other) = delete;
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public:
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deferred_call(FUNC&& f)
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: fn(std::forward<FUNC>(f)), owned(true)
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{
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}
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deferred_call(deferred_call&& other)
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: fn(std::move(other.fn)), owned(other.owned)
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{
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other.owned = false;
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}
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~deferred_call()
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{
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execute();
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}
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bool execute()
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{
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if (owned)
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{
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owned = false;
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fn();
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return true;
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}
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return false;
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}
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private:
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FUNC fn;
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bool owned;
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};
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template <typename F>
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deferred_call<F> defer(F&& f)
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{
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return deferred_call<F>(std::forward<F>(f));
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} |