Source/bmalloc/bmalloc/ScopeExit.h

/*
 * Copyright (C) 2016-2020 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 */

#pragma once

#include <type_traits>
#include <utility>

namespace bmalloc {

template<typename ExitFunction>
class ScopeExit {
public:
    explicit ScopeExit(ExitFunction&& exitFunction)
        : m_exitFunction(exitFunction)
    {
    }

    ~ScopeExit()
    {
        m_exitFunction();
    }

private:
    ExitFunction m_exitFunction;
};

template<typename ExitFunction>
ScopeExit<ExitFunction> makeScopeExit(ExitFunction&& exitFunction)
{
    return ScopeExit<ExitFunction>(std::forward<ExitFunction>(exitFunction));
}
    
} // namespace bmalloc