55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
/*
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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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* Copyright 2012 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_RAII_HPP
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#define __UTIL_RAII_HPP
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#include "preprocessor.hpp"
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/// Defines a translation-unit-unique variable useful for unnamed scoped variables
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#define raii PASTE(__unique_, __COUNTER__)
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namespace util {
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/// Increments a counter for the lifetime of the object
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template <typename T>
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struct scoped_counter {
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explicit scoped_counter (T &_counter):
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counter (_counter)
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{ ++counter; }
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~scoped_counter ()
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{ --counter; }
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T &counter;
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};
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/// Executes a function upon object destruction
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template <typename T>
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struct scoped_function {
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explicit scoped_function (T &&_func):
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func (std::move (_func))
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{ ; }
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~scoped_function ()
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{ func (); }
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T func;
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};
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}
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#endif
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