328 lines
10 KiB
C++
328 lines
10 KiB
C++
/*************************************************************************
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*
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* $RCSfile: exc_thrower.cxx,v $
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*
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* $Revision: 1.6 $
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*
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* last change: $Author: obo $ $Date: 2004-06-04 03:20:49 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#include "osl/diagnose.h"
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#include "osl/doublecheckedlocking.h"
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#include "osl/mutex.hxx"
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#include "uno/dispatcher.hxx"
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#include "uno/mapping.hxx"
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#include "cppu/XExceptionThrower.hpp"
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#include "com/sun/star/uno/RuntimeException.hpp"
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#define OUSTR(x) ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(x) )
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using namespace ::rtl;
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using namespace ::osl;
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using namespace ::cppu;
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using namespace ::com::sun::star::uno;
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namespace
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{
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//==============================================================================
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struct ExceptionThrower : public uno_Interface, XExceptionThrower
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{
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inline ExceptionThrower();
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public:
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static ExceptionThrower * get();
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static inline Type const & getCppuType()
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{
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return ::getCppuType(
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reinterpret_cast< Reference< XExceptionThrower > const * >(0) );
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}
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// XInterface
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virtual Any SAL_CALL queryInterface( Type const & type )
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throw (RuntimeException);
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virtual void SAL_CALL acquire() throw ();
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virtual void SAL_CALL release() throw ();
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// XExceptionThrower
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virtual void SAL_CALL throwException( Any const & exc ) throw (Exception);
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virtual void SAL_CALL rethrowException() throw (Exception);
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};
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extern "C"
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{
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//------------------------------------------------------------------------------
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static void SAL_CALL ExceptionThrower_acquire_release_nop( uno_Interface * )
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{
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}
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//------------------------------------------------------------------------------
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static void SAL_CALL ExceptionThrower_dispatch(
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uno_Interface * pUnoI, typelib_TypeDescription const * pMemberType,
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void * pReturn, void * pArgs [], uno_Any ** ppException )
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{
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OSL_ASSERT( pMemberType->eTypeClass == typelib_TypeClass_INTERFACE_METHOD );
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switch (reinterpret_cast< typelib_InterfaceMemberTypeDescription * >(
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const_cast< typelib_TypeDescription * >( pMemberType ) )->
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nPosition)
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{
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case 0: // queryInterace()
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{
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Type const & rType_demanded =
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*reinterpret_cast< Type const * >( pArgs[ 0 ] );
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if (rType_demanded.equals(
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::getCppuType( reinterpret_cast<
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Reference< XInterface > const * >(0) ) ) ||
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rType_demanded.equals( ExceptionThrower::getCppuType() ))
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{
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typelib_TypeDescription * pTD = 0;
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TYPELIB_DANGER_GET( &pTD, rType_demanded.getTypeLibType() );
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uno_any_construct(
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reinterpret_cast< uno_Any * >( pReturn ), &pUnoI, pTD, 0 );
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TYPELIB_DANGER_RELEASE( pTD );
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}
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else
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{
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uno_any_construct(
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reinterpret_cast< uno_Any * >( pReturn ), 0, 0, 0 );
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}
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*ppException = 0;
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break;
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}
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case 1: // acquire()
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case 2: // release()
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*ppException = 0;
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break;
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case 3: // throwException()
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{
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uno_Any * pAny = reinterpret_cast< uno_Any * >( pArgs[ 0 ] );
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OSL_ASSERT( pAny->pType->eTypeClass == typelib_TypeClass_EXCEPTION );
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uno_type_any_construct( *ppException, pAny->pData, pAny->pType, 0 );
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break;
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}
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default:
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{
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OSL_ASSERT( 0 );
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RuntimeException exc(
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OUSTR("not implemented!"), Reference< XInterface >() );
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uno_type_any_construct(
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*ppException, &exc, ::getCppuType( &exc ).getTypeLibType(), 0 );
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break;
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}
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}
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}
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} // extern "C"
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//______________________________________________________________________________
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Any ExceptionThrower::queryInterface( Type const & type )
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throw (RuntimeException)
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{
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if (type.equals( ::getCppuType( reinterpret_cast<
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Reference< XInterface > const * >(0) ) ) ||
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type.equals( ExceptionThrower::getCppuType() ))
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{
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XExceptionThrower * that = static_cast< XExceptionThrower * >( this );
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return Any( &that, type );
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}
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return Any();
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}
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//______________________________________________________________________________
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void ExceptionThrower::acquire() throw ()
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{
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}
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//______________________________________________________________________________
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void ExceptionThrower::release() throw ()
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{
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}
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//______________________________________________________________________________
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void ExceptionThrower::throwException( Any const & exc ) throw (Exception)
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{
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OSL_ENSURE( 0, "unexpected!" );
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throwException( exc );
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}
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//______________________________________________________________________________
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void ExceptionThrower::rethrowException() throw (Exception)
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{
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throw;
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}
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//______________________________________________________________________________
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inline ExceptionThrower::ExceptionThrower()
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{
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uno_Interface::acquire = ExceptionThrower_acquire_release_nop;
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uno_Interface::release = ExceptionThrower_acquire_release_nop;
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uno_Interface::pDispatcher = ExceptionThrower_dispatch;
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}
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//______________________________________________________________________________
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ExceptionThrower * ExceptionThrower::get()
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{
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ExceptionThrower * s_pThrower = 0;
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if (s_pThrower == 0)
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{
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MutexGuard guard( Mutex::getGlobalMutex() );
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static ExceptionThrower s_thrower;
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OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
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s_pThrower = &s_thrower;
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}
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else
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{
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OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
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}
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return s_pThrower;
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}
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} // anonymous namespace
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namespace cppu
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{
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//==============================================================================
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void SAL_CALL throwException( Any const & exc ) SAL_THROW( (Exception) )
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{
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if (exc.getValueTypeClass() != TypeClass_EXCEPTION)
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{
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throw RuntimeException(
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OUSTR("no UNO exception given "
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"(must be derived from com::sun::star::uno::Exception)!"),
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Reference< XInterface >() );
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}
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Mapping uno2cpp(
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OUSTR(UNO_LB_UNO), OUSTR(CPPU_CURRENT_LANGUAGE_BINDING_NAME) );
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if (! uno2cpp.is())
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{
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throw RuntimeException(
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OUSTR("cannot get binary UNO to C++ mapping!"),
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Reference< XInterface >() );
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}
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Reference< XExceptionThrower > xThrower;
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uno2cpp.mapInterface(
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reinterpret_cast< void ** >( &xThrower ),
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static_cast< uno_Interface * >( ExceptionThrower::get() ),
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ExceptionThrower::getCppuType() );
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OSL_ASSERT( xThrower.is() );
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xThrower->throwException( exc );
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}
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//==============================================================================
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Any SAL_CALL getCaughtException()
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{
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Mapping cpp2uno(
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OUSTR(CPPU_CURRENT_LANGUAGE_BINDING_NAME), OUSTR(UNO_LB_UNO) );
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if (! cpp2uno.is())
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{
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throw RuntimeException(
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OUSTR("cannot get C++ to binary UNO mapping!"),
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Reference< XInterface >() );
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}
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Mapping uno2cpp(
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OUSTR(UNO_LB_UNO), OUSTR(CPPU_CURRENT_LANGUAGE_BINDING_NAME) );
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if (! uno2cpp.is())
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{
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throw RuntimeException(
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OUSTR("cannot get binary UNO to C++ mapping!"),
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Reference< XInterface >() );
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}
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typelib_TypeDescription * pTD = 0;
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TYPELIB_DANGER_GET(
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&pTD, ExceptionThrower::getCppuType().getTypeLibType() );
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UnoInterfaceReference unoI;
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cpp2uno.mapInterface(
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reinterpret_cast< void ** >( &unoI.m_pUnoI ),
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static_cast< XExceptionThrower * >( ExceptionThrower::get() ), pTD );
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OSL_ASSERT( unoI.is() );
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typelib_TypeDescription * pMemberTD = 0;
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TYPELIB_DANGER_GET(
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&pMemberTD,
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reinterpret_cast< typelib_InterfaceTypeDescription * >( pTD )->
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ppMembers[ 1 ] /* rethrowException() */ );
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uno_Any exc_mem;
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uno_Any * exc = &exc_mem;
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unoI.dispatch( pMemberTD, 0, 0, &exc );
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TYPELIB_DANGER_RELEASE( pMemberTD );
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TYPELIB_DANGER_RELEASE( pTD );
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if (exc == 0)
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{
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throw RuntimeException(
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OUSTR("rethrowing C++ exception failed!"),
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Reference< XInterface >() );
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}
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Any ret;
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uno_any_destruct( &ret, cpp_release );
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uno_type_any_constructAndConvert(
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&ret, exc->pData, exc->pType, uno2cpp.get() );
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uno_any_destruct( exc, 0 );
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return ret;
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}
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}
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