xref: /trunk/main/bridges/source/cpp_uno/shared/bridge.cxx (revision 61dff127b6698e0bae836c8aedd6ec62111483d1)

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 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_bridges.hxx"

#include "bridges/cpp_uno/shared/bridge.hxx"

#include "component.hxx"

#include "bridges/cpp_uno/shared/cppinterfaceproxy.hxx"
#include "bridges/cpp_uno/shared/unointerfaceproxy.hxx"

#include "com/sun/star/uno/XInterface.hpp"
#include "osl/diagnose.h"
#include "osl/interlck.h"
#include "rtl/ustring.h"
#include "sal/types.h"
#include "typelib/typedescription.h"
#include "uno/dispatcher.h"
#include "uno/environment.h"
#include "uno/mapping.h"

namespace bridges { namespace cpp_uno { namespace shared {

void freeMapping(uno_Mapping * pMapping)
{
    delete static_cast< Bridge::Mapping * >( pMapping )->pBridge;
}

void acquireMapping(uno_Mapping * pMapping)
{
    static_cast< Bridge::Mapping * >( pMapping )->pBridge->acquire();
}

void releaseMapping(uno_Mapping * pMapping)
{
    static_cast< Bridge::Mapping * >( pMapping )->pBridge->release();
}

void cpp2unoMapping(
    uno_Mapping * pMapping, void ** ppUnoI, void * pCppI,
    typelib_InterfaceTypeDescription * pTypeDescr)
{
    OSL_ENSURE( ppUnoI && pTypeDescr, "### null ptr!" );
    if (*ppUnoI)
    {
        (*reinterpret_cast< uno_Interface * >( *ppUnoI )->release)(
            reinterpret_cast< uno_Interface * >( *ppUnoI ) );
        *ppUnoI = 0;
    }
    if (pCppI)
    {
        Bridge * pBridge = static_cast< Bridge::Mapping * >( pMapping )->pBridge;

        // get object id of interface to be wrapped
        rtl_uString * pOId = 0;
        (*pBridge->pCppEnv->getObjectIdentifier)(
            pBridge->pCppEnv, &pOId, pCppI );
        OSL_ASSERT( pOId );

        // try to get any known interface from target environment
        (*pBridge->pUnoEnv->getRegisteredInterface)(
            pBridge->pUnoEnv, ppUnoI, pOId, pTypeDescr );

        if (! *ppUnoI) // no existing interface, register new proxy interface
        {
            // try to publish a new proxy (refcount initially 1)
            uno_Interface * pSurrogate
                = bridges::cpp_uno::shared::UnoInterfaceProxy::create(
                    pBridge,
                    static_cast< ::com::sun::star::uno::XInterface * >( pCppI ),
                    pTypeDescr, pOId );

            // proxy may be exchanged during registration
            (*pBridge->pUnoEnv->registerProxyInterface)(
                pBridge->pUnoEnv, reinterpret_cast< void ** >( &pSurrogate ),
                freeUnoInterfaceProxy, pOId,
                pTypeDescr );

            *ppUnoI = pSurrogate;
        }
        ::rtl_uString_release( pOId );
    }
}

void uno2cppMapping(
    uno_Mapping * pMapping, void ** ppCppI, void * pUnoI,
    typelib_InterfaceTypeDescription * pTypeDescr)
{
    OSL_ASSERT( ppCppI && pTypeDescr );
    if (*ppCppI)
    {
        static_cast< ::com::sun::star::uno::XInterface * >( *ppCppI )->
            release();
        *ppCppI = 0;
    }
    if (pUnoI)
    {
        Bridge * pBridge = static_cast< Bridge::Mapping * >( pMapping )->pBridge;

        // get object id of uno interface to be wrapped
        rtl_uString * pOId = 0;
        (*pBridge->pUnoEnv->getObjectIdentifier)(
            pBridge->pUnoEnv, &pOId, pUnoI );
        OSL_ASSERT( pOId );

        // try to get any known interface from target environment
        (*pBridge->pCppEnv->getRegisteredInterface)(
            pBridge->pCppEnv, ppCppI, pOId, pTypeDescr );

        if (! *ppCppI) // no existing interface, register new proxy interface
        {
            // try to publish a new proxy (ref count initially 1)
            com::sun::star::uno::XInterface * pProxy
                = bridges::cpp_uno::shared::CppInterfaceProxy::create(
                    pBridge, static_cast< uno_Interface * >( pUnoI ),
                    pTypeDescr, pOId );

            // proxy may be exchanged during registration
            (*pBridge->pCppEnv->registerProxyInterface)(
                pBridge->pCppEnv, reinterpret_cast< void ** >( &pProxy ),
                freeCppInterfaceProxy, pOId,
                pTypeDescr );

            *ppCppI = pProxy;
        }
        ::rtl_uString_release( pOId );
    }
}

uno_Mapping * Bridge::createMapping(
    uno_ExtEnvironment * pCppEnv, uno_ExtEnvironment * pUnoEnv,
    bool bExportCpp2Uno) SAL_THROW(())
{
    Bridge * bridge = new Bridge(pCppEnv, pUnoEnv, bExportCpp2Uno);
    return bExportCpp2Uno ? &bridge->aCpp2Uno : &bridge->aUno2Cpp;
}

void Bridge::acquire() SAL_THROW(())
{
    if (1 == osl_incrementInterlockedCount( &nRef ))
    {
        if (bExportCpp2Uno)
        {
            uno_Mapping * pMapping = &aCpp2Uno;
            ::uno_registerMapping(
                &pMapping, freeMapping, (uno_Environment *)pCppEnv,
                (uno_Environment *)pUnoEnv, 0 );
        }
        else
        {
            uno_Mapping * pMapping = &aUno2Cpp;
            ::uno_registerMapping(
                &pMapping, freeMapping, (uno_Environment *)pUnoEnv,
                (uno_Environment *)pCppEnv, 0 );
        }
    }
}

void Bridge::release() SAL_THROW(())
{
    if (! osl_decrementInterlockedCount( &nRef ))
    {
        ::uno_revokeMapping( bExportCpp2Uno ? &aCpp2Uno : &aUno2Cpp );
    }
}

Bridge::Bridge(
    uno_ExtEnvironment * pCppEnv_, uno_ExtEnvironment * pUnoEnv_,
    bool bExportCpp2Uno_) SAL_THROW(())
    : nRef( 1 )
    , pCppEnv( pCppEnv_ )
    , pUnoEnv( pUnoEnv_ )
    , bExportCpp2Uno( bExportCpp2Uno_ )
{
    bridges::cpp_uno::shared::g_moduleCount.modCnt.acquire(
        &bridges::cpp_uno::shared::g_moduleCount.modCnt );

    aCpp2Uno.pBridge = this;
    aCpp2Uno.acquire = acquireMapping;
    aCpp2Uno.release = releaseMapping;
    aCpp2Uno.mapInterface = cpp2unoMapping;

    aUno2Cpp.pBridge = this;
    aUno2Cpp.acquire = acquireMapping;
    aUno2Cpp.release = releaseMapping;
    aUno2Cpp.mapInterface = uno2cppMapping;

    (*((uno_Environment *)pCppEnv)->acquire)( (uno_Environment *)pCppEnv );
    (*((uno_Environment *)pUnoEnv)->acquire)( (uno_Environment *)pUnoEnv );
}

Bridge::~Bridge() SAL_THROW(())
{
    (*((uno_Environment *)pUnoEnv)->release)( (uno_Environment *)pUnoEnv );
    (*((uno_Environment *)pCppEnv)->release)( (uno_Environment *)pCppEnv );
    bridges::cpp_uno::shared::g_moduleCount.modCnt.release(
        &bridges::cpp_uno::shared::g_moduleCount.modCnt );
}

} } }