include/comphelper/scopeguard.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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   9  * This file incorporates work covered by the following license notice:
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  12  *   contributor license agreements. See the NOTICE file distributed
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  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_COMPHELPER_SCOPEGUARD_HXX
  21 #define INCLUDED_COMPHELPER_SCOPEGUARD_HXX
  22
  23 #include <comphelper/comphelperdllapi.h>
  24 #include <boost/function.hpp>
  25 #include <boost/bind.hpp>
  26
  27 namespace comphelper {
  28
  29 /** ScopeGuard to ease writing exception-safe code.
  30  */
  31 class COMPHELPER_DLLPUBLIC ScopeGuard
  32 {
  33 public:
  34     enum exc_handling { IGNORE_EXCEPTIONS, ALLOW_EXCEPTIONS };
  35
  36     /** @param func function object to be executed in dtor
  37         @param excHandling switches whether thrown exceptions in dtor will be
  38                            silently ignored (but OSL_ asserted)
  39     */
  40     template <typename func_type>
  41     explicit ScopeGuard( func_type const & func,
  42                          exc_handling excHandling = IGNORE_EXCEPTIONS )
  43         : m_func( func ), m_excHandling( excHandling ) {}
  44
  45     ~ScopeGuard();
  46
  47     /** Dismisses the scope guard, i.e. the function won't
  48         be executed.
  49     */
  50     void dismiss();
  51
  52 private:
  53     // noncopyable until we have good reasons...
  54     ScopeGuard(const ScopeGuard&) SAL_DELETED_FUNCTION;
  55     ScopeGuard& operator=(const ScopeGuard&) SAL_DELETED_FUNCTION;
  56
  57     ::boost::function0<void> m_func; // preferring portable syntax
  58     exc_handling const m_excHandling;
  59 };
  60
  61 } // namespace comphelper
  62
  63 #endif // ! defined(INCLUDED_COMPHELPER_SCOPEGUARD_HXX)
  64
  65 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */