145 lines
4.8 KiB
C++
145 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <cppinterfaceproxy.hxx>
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#include <bridge.hxx>
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#include <utility>
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#include <vtablefactory.hxx>
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#include <com/sun/star/uno/XInterface.hpp>
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#include <typelib/typedescription.h>
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#include <cstddef>
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#include <memory>
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#include <new>
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namespace bridges::cpp_uno::shared {
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void freeCppInterfaceProxy(uno_ExtEnvironment * pEnv, void * pInterface)
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{
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CppInterfaceProxy * pThis = CppInterfaceProxy::castInterfaceToProxy(
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pInterface);
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if (pEnv != pThis->pBridge->getCppEnv()) {
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assert(false);
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}
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(*pThis->pBridge->getUnoEnv()->revokeInterface)(
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pThis->pBridge->getUnoEnv(), pThis->pUnoI );
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(*pThis->pUnoI->release)( pThis->pUnoI );
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::typelib_typedescription_release(
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&pThis->pTypeDescr->aBase );
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pThis->pBridge->release();
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#if OSL_DEBUG_LEVEL > 1
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*(int *)pInterface = 0xdeadbabe;
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#endif
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pThis->~CppInterfaceProxy();
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delete[] reinterpret_cast< char * >(pThis);
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}
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css::uno::XInterface * CppInterfaceProxy::create(
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bridges::cpp_uno::shared::Bridge * pBridge, uno_Interface * pUnoI,
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typelib_InterfaceTypeDescription * pTypeDescr, OUString const & rOId)
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{
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typelib_typedescription_complete(
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reinterpret_cast< typelib_TypeDescription ** >(&pTypeDescr));
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static bridges::cpp_uno::shared::VtableFactory factory;
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const bridges::cpp_uno::shared::VtableFactory::Vtables& rVtables(
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factory.getVtables(pTypeDescr));
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std::unique_ptr< char[] > pMemory(
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new char[
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sizeof (CppInterfaceProxy)
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+ (rVtables.count - 1) * sizeof (void **)]);
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new(pMemory.get()) CppInterfaceProxy(pBridge, pUnoI, pTypeDescr, rOId);
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CppInterfaceProxy * pProxy = reinterpret_cast< CppInterfaceProxy * >(
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pMemory.release());
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for (sal_Int32 i = 0; i < rVtables.count; ++i) {
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pProxy->vtables[i] = VtableFactory::mapBlockToVtable(
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rVtables.blocks[i].start);
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}
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// coverity[leaked_storage : FALSE] - see freeCppInterfaceProxy
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return castProxyToInterface(pProxy);
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}
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void CppInterfaceProxy::acquireProxy()
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{
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if (++nRef == 1)
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{
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// rebirth of proxy zombie
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// register at cpp env
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void * pThis = castProxyToInterface( this );
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(*pBridge->getCppEnv()->registerProxyInterface)(
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pBridge->getCppEnv(), &pThis, freeCppInterfaceProxy, oid.pData,
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pTypeDescr );
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assert(pThis == castProxyToInterface(this));
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}
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}
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void CppInterfaceProxy::releaseProxy()
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{
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if (! --nRef ) // last release
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{
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// revoke from cpp env
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(*pBridge->getCppEnv()->revokeInterface)(
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pBridge->getCppEnv(), castProxyToInterface( this ) );
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}
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}
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CppInterfaceProxy::CppInterfaceProxy(
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bridges::cpp_uno::shared::Bridge * pBridge_, uno_Interface * pUnoI_,
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typelib_InterfaceTypeDescription * pTypeDescr_, OUString aOId_)
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: nRef( 1 )
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, pBridge( pBridge_ )
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, pUnoI( pUnoI_ )
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, pTypeDescr( pTypeDescr_ )
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, oid(std::move( aOId_ ))
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{
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pBridge->acquire();
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::typelib_typedescription_acquire( &pTypeDescr->aBase );
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(*pUnoI->acquire)( pUnoI );
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(*pBridge->getUnoEnv()->registerInterface)(
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pBridge->getUnoEnv(), reinterpret_cast< void ** >( &pUnoI ), oid.pData,
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pTypeDescr );
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}
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CppInterfaceProxy::~CppInterfaceProxy()
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{}
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css::uno::XInterface * CppInterfaceProxy::castProxyToInterface(
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CppInterfaceProxy * pProxy)
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{
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return reinterpret_cast< css::uno::XInterface * >(
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&pProxy->vtables);
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}
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CppInterfaceProxy * CppInterfaceProxy::castInterfaceToProxy(void * pInterface)
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{
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// pInterface == &pProxy->vtables (this emulated offsetof is not truly
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// portable):
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char const * const base = reinterpret_cast< char const * >(16);
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std::ptrdiff_t const offset = reinterpret_cast< char const * >(
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&reinterpret_cast< CppInterfaceProxy const * >(base)->vtables) - base;
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return reinterpret_cast< CppInterfaceProxy * >(
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static_cast< char * >(pInterface) - offset);
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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