libreoffice/canvas/source/tools/prioritybooster.cxx

/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: prioritybooster.cxx,v $
 *
 *  $Revision: 1.6 $
 *
 *  last change: $Author: obo $ $Date: 2006-10-12 11:32:11 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_canvas.hxx"


#ifdef WNT
# if defined _MSC_VER
# pragma warning(push,1)
# endif

# include <windows.h>

# if defined _MSC_VER
# pragma warning(pop)
# endif
#endif

#include "osl/diagnose.h"
#include "canvas/prioritybooster.hxx"


namespace canvas
{
    namespace tools
    {
        struct PriorityBooster_Impl
        {
            int mnOldPriority;
        };

        PriorityBooster::PriorityBooster( sal_Int32 nDelta ) :
            mpImpl( new PriorityBooster_Impl )
        {
#ifdef WNT
            HANDLE aCurrThread = GetCurrentThread();
            mpImpl->mnOldPriority = GetThreadPriority( aCurrThread );

            if ( 0 == SetThreadPriority( aCurrThread, mpImpl->mnOldPriority + nDelta ) )
            {
                OSL_ENSURE( false,
                            "PriorityBooster::PriorityBooster(): Was not able to modify thread priority" );
            }
#else
            nDelta = 0; // #i55991# placate gcc warning
#endif
        }

        PriorityBooster::~PriorityBooster()
        {
#ifdef WNT
            SetThreadPriority( GetCurrentThread(),
                               mpImpl->mnOldPriority );
#endif
        }
    } // namespace tools

} // namespace canvas