diff options
Diffstat (limited to 'cppuhelper/source/implbase_ex.cxx')
| -rw-r--r-- | cppuhelper/source/implbase_ex.cxx | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/cppuhelper/source/implbase_ex.cxx b/cppuhelper/source/implbase_ex.cxx new file mode 100644 index 000000000..4ced30adb --- /dev/null +++ b/cppuhelper/source/implbase_ex.cxx @@ -0,0 +1,402 @@ +/* -*- 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 . + */ + +#include <osl/diagnose.h> +#include <sal/log.hxx> +#include <cppuhelper/compbase_ex.hxx> +#include <cppuhelper/implbase_ex.hxx> + +#include <com/sun/star/uno/RuntimeException.hpp> + +#include <mutex> + +using namespace ::cppu; +using namespace ::osl; +using namespace ::com::sun::star; +using namespace ::com::sun::star::uno; + +namespace cppu +{ + +static void checkInterface( Type const & rType ) +{ + if (TypeClass_INTERFACE != rType.getTypeClass()) + { + OUString msg( "querying for interface \"" + rType.getTypeName() + "\": no interface type!" ); + SAL_WARN( "cppuhelper", msg ); + throw RuntimeException( msg ); + } +} + +static bool isXInterface( rtl_uString * pStr ) +{ + return OUString::unacquired(&pStr) == "com.sun.star.uno.XInterface"; +} + +static void * makeInterface( sal_IntPtr nOffset, void * that ) +{ + return (static_cast<char *>(that) + nOffset); +} + +static bool td_equals( + typelib_TypeDescriptionReference const * pTDR1, + typelib_TypeDescriptionReference const * pTDR2 ) +{ + return ((pTDR1 == pTDR2) || + OUString::unacquired(&pTDR1->pTypeName) == OUString::unacquired(&pTDR2->pTypeName)); +} + +static type_entry * getTypeEntries( class_data * cd ) +{ + type_entry * pEntries = cd->m_typeEntries; + if (! cd->m_storedTypeRefs) // not inited? + { + static std::mutex aMutex; + std::scoped_lock guard( aMutex ); + if (! cd->m_storedTypeRefs) // not inited? + { + // get all types + for ( sal_Int32 n = cd->m_nTypes; n--; ) + { + type_entry * pEntry = &pEntries[ n ]; + Type const & rType = (*pEntry->m_type.getCppuType)( nullptr ); + OSL_ENSURE( rType.getTypeClass() == TypeClass_INTERFACE, "### wrong helper init: expected interface!" ); + OSL_ENSURE( ! isXInterface( rType.getTypeLibType()->pTypeName ), "### want to implement XInterface: template argument is XInterface?!?!?!" ); + if (rType.getTypeClass() != TypeClass_INTERFACE) + { + OUString msg( "type \"" + rType.getTypeName() + "\" is no interface type!" ); + SAL_WARN( "cppuhelper", msg ); + throw RuntimeException( msg ); + } + // ref is statically held by getCppuType() + pEntry->m_type.typeRef = rType.getTypeLibType(); + } + OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER(); + cd->m_storedTypeRefs = true; + } + } + else + { + OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER(); + } + return pEntries; +} + +static void fillTypes( Type * types, class_data * cd ) +{ + type_entry * pEntries = getTypeEntries( cd ); + for ( sal_Int32 n = cd->m_nTypes; n--; ) + { + types[ n ] = pEntries[ n ].m_type.typeRef; + } +} + +namespace { + +bool recursivelyFindType( + typelib_TypeDescriptionReference const * demandedType, + typelib_InterfaceTypeDescription const * type, sal_IntPtr * offset) +{ + // This code assumes that the vtables of a multiple-inheritance class (the + // offset amount by which to adjust the this pointer) follow one another in + // the object layout, and that they contain slots for the inherited classes + // in a specific order. In theory, that need not hold for any given + // platform; in practice, it seems to work well on all supported platforms: + next: + for (sal_Int32 i = 0; i < type->nBaseTypes; ++i) { + if (i > 0) { + *offset += sizeof (void *); + } + typelib_InterfaceTypeDescription const * base = type->ppBaseTypes[i]; + // ignore XInterface: + if (base->nBaseTypes > 0) { + if (td_equals( + reinterpret_cast< + typelib_TypeDescriptionReference const * >(base), + demandedType)) + { + return true; + } + // Profiling showed that it is important to speed up the common case + // of only one base: + if (type->nBaseTypes == 1) { + type = base; + goto next; + } + if (recursivelyFindType(demandedType, base, offset)) { + return true; + } + } + } + return false; +} + +} + +static void * queryDeepNoXInterface( + typelib_TypeDescriptionReference const * pDemandedTDR, class_data * cd, void * that ) +{ + type_entry * pEntries = getTypeEntries( cd ); + sal_Int32 nTypes = cd->m_nTypes; + sal_Int32 n; + + // try top interfaces without getting td + for ( n = 0; n < nTypes; ++n ) + { + if (td_equals( pEntries[ n ].m_type.typeRef, pDemandedTDR )) + { + return makeInterface( pEntries[ n ].m_offset, that ); + } + } + // query deep getting td + for ( n = 0; n < nTypes; ++n ) + { + typelib_TypeDescription * pTD = nullptr; + TYPELIB_DANGER_GET( &pTD, pEntries[ n ].m_type.typeRef ); + if (pTD) + { + // exclude top (already tested) and bottom (XInterface) interface + OSL_ENSURE( + reinterpret_cast< typelib_InterfaceTypeDescription * >(pTD)-> + nBaseTypes > 0, + "### want to implement XInterface:" + " template argument is XInterface?!?!?!" ); + sal_IntPtr offset = pEntries[n].m_offset; + bool found = recursivelyFindType( + pDemandedTDR, + reinterpret_cast< typelib_InterfaceTypeDescription * >(pTD), + &offset); + TYPELIB_DANGER_RELEASE( pTD ); + if (found) { + return makeInterface( offset, that ); + } + } + else + { + OUString msg( "cannot get type description for type \"" + OUString::unacquired(&pEntries[ n ].m_type.typeRef->pTypeName) + "\"!" ); + SAL_WARN( "cppuhelper", msg ); + throw RuntimeException( msg ); + } + } + return nullptr; +} + +// ImplHelper + +Any SAL_CALL ImplHelper_query( + Type const & rType, class_data * cd, void * that ) +{ + checkInterface( rType ); + typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType(); + + void * p; + // shortcut for XInterface + if (isXInterface( pTDR->pTypeName )) + { + // take first one + p = makeInterface( cd->m_typeEntries[ 0 ].m_offset, that ); + } + else + { + p = queryDeepNoXInterface( pTDR, cd, that ); + if (! p) + { + return Any(); + } + } + return Any( &p, pTDR ); +} + +Any SAL_CALL ImplHelper_queryNoXInterface( + Type const & rType, class_data * cd, void * that ) +{ + checkInterface( rType ); + typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType(); + + void * p = queryDeepNoXInterface( pTDR, cd, that ); + if (p) + { + return Any( &p, pTDR ); + } + return Any(); +} + +css::uno::Sequence<sal_Int8> ImplHelper_getImplementationId( + SAL_UNUSED_PARAMETER class_data *) +{ + return css::uno::Sequence<sal_Int8>(); +} + +Sequence< Type > SAL_CALL ImplHelper_getTypes( + class_data * cd ) +{ + Sequence< Type > types( cd->m_nTypes ); + Type * pTypes = types.getArray(); + fillTypes( pTypes, cd ); + return types; +} + +Sequence< Type > SAL_CALL ImplInhHelper_getTypes( + class_data * cd, Sequence< Type > const & rAddTypes ) +{ + sal_Int32 nImplTypes = cd->m_nTypes; + sal_Int32 nAddTypes = rAddTypes.getLength(); + Sequence< Type > types( nImplTypes + nAddTypes ); + Type * pTypes = types.getArray(); + fillTypes( pTypes, cd ); + // append base types + Type const * pAddTypes = rAddTypes.getConstArray(); + while (nAddTypes--) + { + pTypes[ nImplTypes + nAddTypes ] = pAddTypes[ nAddTypes ]; + } + return types; +} + +// WeakImplHelper + +Any SAL_CALL WeakImplHelper_query( + Type const & rType, class_data * cd, void * that, OWeakObject * pBase ) +{ + checkInterface( rType ); + typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType(); + + // shortcut XInterface to OWeakObject + if (! isXInterface( pTDR->pTypeName )) + { + void * p = queryDeepNoXInterface( pTDR, cd, that ); + if (p) + { + return Any( &p, pTDR ); + } + } + return pBase->OWeakObject::queryInterface( rType ); +} + +Sequence< Type > SAL_CALL WeakImplHelper_getTypes( + class_data * cd ) +{ + sal_Int32 nTypes = cd->m_nTypes; + Sequence< Type > types( nTypes +1 ); + Type * pTypes = types.getArray(); + fillTypes( pTypes, cd ); + pTypes[ nTypes ] = cppu::UnoType<XWeak>::get(); + return types; +} + +// WeakAggImplHelper + +Any SAL_CALL WeakAggImplHelper_queryAgg( + Type const & rType, class_data * cd, void * that, OWeakAggObject * pBase ) +{ + checkInterface( rType ); + typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType(); + + // shortcut XInterface to OWeakAggObject + if (! isXInterface( pTDR->pTypeName )) + { + void * p = queryDeepNoXInterface( pTDR, cd, that ); + if (p) + { + return Any( &p, pTDR ); + } + } + return pBase->OWeakAggObject::queryAggregation( rType ); +} + +Sequence< Type > SAL_CALL WeakAggImplHelper_getTypes( + class_data * cd ) +{ + sal_Int32 nTypes = cd->m_nTypes; + Sequence< Type > types( nTypes +2 ); + Type * pTypes = types.getArray(); + fillTypes( pTypes, cd ); + pTypes[ nTypes++ ] = cppu::UnoType<XWeak>::get(); + pTypes[ nTypes ] = cppu::UnoType<XAggregation>::get(); + return types; +} + +// WeakComponentImplHelper + +Any SAL_CALL WeakComponentImplHelper_query( + Type const & rType, class_data * cd, void * that, WeakComponentImplHelperBase * pBase ) +{ + checkInterface( rType ); + typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType(); + + // shortcut XInterface to WeakComponentImplHelperBase + if (! isXInterface( pTDR->pTypeName )) + { + void * p = queryDeepNoXInterface( pTDR, cd, that ); + if (p) + { + return Any( &p, pTDR ); + } + } + return pBase->WeakComponentImplHelperBase::queryInterface( rType ); +} + +Sequence< Type > SAL_CALL WeakComponentImplHelper_getTypes( + class_data * cd ) +{ + sal_Int32 nTypes = cd->m_nTypes; + Sequence< Type > types( nTypes +2 ); + Type * pTypes = types.getArray(); + fillTypes( pTypes, cd ); + pTypes[ nTypes++ ] = cppu::UnoType<XWeak>::get(); + pTypes[ nTypes ] = cppu::UnoType<lang::XComponent>::get(); + return types; +} + +// WeakAggComponentImplHelper + +Any SAL_CALL WeakAggComponentImplHelper_queryAgg( + Type const & rType, class_data * cd, void * that, WeakAggComponentImplHelperBase * pBase ) +{ + checkInterface( rType ); + typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType(); + + // shortcut XInterface to WeakAggComponentImplHelperBase + if (! isXInterface( pTDR->pTypeName )) + { + void * p = queryDeepNoXInterface( pTDR, cd, that ); + if (p) + { + return Any( &p, pTDR ); + } + } + return pBase->WeakAggComponentImplHelperBase::queryAggregation( rType ); +} + +Sequence< Type > SAL_CALL WeakAggComponentImplHelper_getTypes( + class_data * cd ) +{ + sal_Int32 nTypes = cd->m_nTypes; + Sequence< Type > types( nTypes +3 ); + Type * pTypes = types.getArray(); + fillTypes( pTypes, cd ); + pTypes[ nTypes++ ] = cppu::UnoType<XWeak>::get(); + pTypes[ nTypes++ ] = cppu::UnoType<XAggregation>::get(); + pTypes[ nTypes ] = cppu::UnoType<lang::XComponent>::get(); + return types; +} + +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |