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# ntqguardedptr.h

This is the verbatim text of the ntqguardedptr.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/ntqguardedptr.h   3.3.8   edited Jan 11 14:38 $
    **
    ** Definition of TQGuardedPtr class
    **
    ** Created : 990929
    **
    ** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
    **
    ** This file is part of the kernel module of the TQt GUI Toolkit.
    **
    ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file. Alternatively you may (at your option) use any
    ** later version of the GNU General Public License if such license has
    ** been publicly approved by Trolltech ASA (or its successors, if any)
    ** and the KDE Free TQt Foundation.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/.
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
    ** or contact the sales department at sales@trolltech.com.
    **
    ** This file may be used under the terms of the Q Public License as
    ** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
    ** included in the packaging of this file.  Licensees holding valid TQt
    ** Commercial licenses may use this file in accordance with the TQt
    ** Commercial License Agreement provided with the Software.
    **
    ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
    ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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    **********************************************************************/

    #ifndef TQGUARDEDPTR_H
    #define TQGUARDEDPTR_H

    #ifndef QT_H
    #include "ntqobject.h"
    #endif // QT_H

    // ### 4.0: rename to something without Private in it. Not really internal.
    class TQ_EXPORT TQGuardedPtrPrivate : public TQObject, public TQShared
    {
        TQ_OBJECT
    public:
        TQGuardedPtrPrivate( TQObject* );
        ~TQGuardedPtrPrivate();

        TQObject* object() const;
        void reconnect( TQObject* );

    private slots:
        void objectDestroyed();

    private:
        TQObject* obj;
    #if defined(TQ_DISABLE_COPY) // Disabled copy constructor and operator=
        TQGuardedPtrPrivate( const TQGuardedPtrPrivate & );
        TQGuardedPtrPrivate &operator=( const TQGuardedPtrPrivate & );
    #endif
    };

    template <class T>
    class TQGuardedPtr
    {
    public:
        TQGuardedPtr() : priv( new TQGuardedPtrPrivate( 0 ) ) {}

        TQGuardedPtr( T* o) {
    	priv = new TQGuardedPtrPrivate( (TQObject*)o );
        }

        TQGuardedPtr(const TQGuardedPtr<T> &p) {
    	priv = p.priv;
    	ref();
        }

        ~TQGuardedPtr() { deref(); }

        TQGuardedPtr<T> &operator=(const TQGuardedPtr<T> &p) {
    	if ( priv != p.priv ) {
    	    deref();
    	    priv = p.priv;
    	    ref();
    	}
    	return *this;
        }

        TQGuardedPtr<T> &operator=(T* o) {
    	if ( priv && priv->count == 1 ) {
    	    priv->reconnect( (TQObject*)o );
    	} else {
    	    deref();
    	    priv = new TQGuardedPtrPrivate( (TQObject*)o );
    	}
    	return *this;
        }

        bool operator==( const TQGuardedPtr<T> &p ) const {
    	return (T*)(*this) == (T*) p;
        }

        bool operator!= ( const TQGuardedPtr<T>& p ) const {
    	return !( *this == p );
        }

        bool isNull() const { return !priv || !priv->object(); }

        T* operator->() const { return (T*)(priv?priv->object():0); }

        T& operator*() const { return *((T*)(priv?priv->object():0)); }

        operator T*() const { return (T*)(priv?priv->object():0); }

    private:

        void ref() { if (priv) priv->ref(); }

        void deref() {
    	if ( priv && priv->deref() )
    	    delete priv;
        }

        TQGuardedPtrPrivate* priv;
    };

    inline TQObject* TQGuardedPtrPrivate::object() const
    {
        return obj;
    }

    #define Q_DEFINED_QGUARDEDPTR
    #include "ntqwinexport.h"
    #endif