SSL componentbase.hxx Sprache: C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* 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_COMPONENTBASE_HXX
#define INCLUDED_COMPHELPER_COMPONENTBASE_HXX

#include <comphelper/comphelperdllapi.h>
#include <cppuhelper/interfacecontainer.h>

namespace comphelper
{

    //= ComponentBase

    class COMPHELPER_DLLPUBLIC ComponentBase
    {
    protected:
        /** creates a ComponentBase instance

            The instance is not initialized. As a consequence, every ComponentMethodGuard instantiated for
            this component will throw a css::lang::NotInitializedException,
            until ->setInitialized() is called.
        */
        ComponentBase( ::cppu::OBroadcastHelper& _rBHelper )
            :m_rBHelper( _rBHelper )
            ,m_bInitialized( false )
        {
        }

        struct NoInitializationNeeded { };

        /** creates a ComponentBase instance

            The instance is already initialized, so there's no need to call setInitialized later on. Use this
            constructor for component implementations which do not require explicit initialization.
        */
        ComponentBase( ::cppu::OBroadcastHelper& _rBHelper, NoInitializationNeeded )
            :m_rBHelper( _rBHelper )
            ,m_bInitialized( true )
        {
        }

        ~ComponentBase() COVERITY_NOEXCEPT_FALSE {}

        /** marks the instance as initialized

            Subsequent instantiations of a ComponentMethodGuard won't throw the NotInitializedException now.
        */
        void setInitialized()    { m_bInitialized = true; }

    public:
        /// helper struct to grant access to selected public methods to the ComponentMethodGuard class
        struct GuardAccess { friend class ComponentMethodGuard; private: GuardAccess() { } };

        /// retrieves the component's mutex
        ::osl::Mutex&   getMutex( GuardAccess )                 { return getMutex(); }
        /// checks whether the component is already disposed, throws a DisposedException if so.
        void                    checkDisposed( GuardAccess ) const;
        /// checks whether the component is already initialized, throws a NotInitializedException if not.
        void                    checkInitialized( GuardAccess ) const;

    protected:
        /// retrieves the component's broadcast helper
        ::cppu::OBroadcastHelper&   getBroadcastHelper()    { return m_rBHelper; }
        /// retrieves the component's mutex
        ::osl::Mutex&               getMutex()              { return m_rBHelper.rMutex; }
        /// determines whether the instance is already disposed
        bool                        impl_isDisposed() const { return m_rBHelper.bDisposed; }

        /// determines whether the component is already initialized
        bool
                impl_isInitialized_nothrow() const { return m_bInitialized; }

        /** returns the context to be used when throwing exceptions

            The default implementation returns <NULL/>.
        */
        static css::uno::Reference< css::uno::XInterface >
                getComponent();

    private:
        ::cppu::OBroadcastHelper&   m_rBHelper;
        bool                        m_bInitialized;
    };

    class ComponentMethodGuard
    {
    public:
        enum class MethodType
        {
            /// allow the method to be called only when being initialized and not being disposed
            Default,
            /// allow the method to be called without being initialized
            WithoutInit

        };

        ComponentMethodGuard( ComponentBase& _rComponent, const MethodType _eType = MethodType::Default )
            :m_aMutexGuard( _rComponent.getMutex( ComponentBase::GuardAccess() ) )
        {
            if ( _eType != MethodType::WithoutInit )
                _rComponent.checkInitialized( ComponentBase::GuardAccess() );
            _rComponent.checkDisposed( ComponentBase::GuardAccess() );
        }

        void clear()
        {
            m_aMutexGuard.clear();
        }

    private:
        osl::ClearableMutexGuard m_aMutexGuard;
    };

} // namespace ComponentBase

#endif // INCLUDED_COMPHELPER_COMPONENTBASE_HXX

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

quality100%

¤ Dauer der Verarbeitung: 0.25 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.