/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
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 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you 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 .
 */

#ifndef INCLUDED_COMPHELPER_SCOPEGUARD_HXX
#define INCLUDED_COMPHELPER_SCOPEGUARD_HXX

#include <comphelper/comphelperdllapi.h>
#include <boost/function.hpp>
#include <boost/noncopyable.hpp>
#include <boost/bind.hpp>

namespace comphelper {

/** ScopeGuard to ease writing exception-safe code.
 */
class COMPHELPER_DLLPUBLIC ScopeGuard : private ::boost::noncopyable
                                        // noncopyable until we have
                                        // good reasons...
{
public:
    enum exc_handling { IGNORE_EXCEPTIONS, ALLOW_EXCEPTIONS };

    /** @param func function object to be executed in dtor
        @param excHandling switches whether thrown exceptions in dtor will be
                           silently ignored (but OSL_ asserted)
    */
    template <typename func_type>
    explicit ScopeGuard( func_type const & func,
                         exc_handling excHandling = IGNORE_EXCEPTIONS )
        : m_func( func ), m_excHandling( excHandling ) {}

    ~ScopeGuard();

    /** Dismisses the scope guard, i.e. the function won't
        be executed.
    */
    void dismiss();

private:
    ::boost::function0<void> m_func; // preferring portable syntax
    exc_handling const m_excHandling;
};

} // namespace comphelper

#endif // ! defined(INCLUDED_COMPHELPER_SCOPEGUARD_HXX)

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