xref: /trunk/main/salhelper/source/dynload.cxx (revision cf6516809c57e1bb0a940545cca99cdad54d4ce2)

/**************************************************************
 *
 * 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
 * under the License.
 *
 *************************************************************/



#include <salhelper/dynload.hxx>
#include <rtl/ustrbuf.hxx>

namespace salhelper
{

typedef void*   (SAL_CALL *ApiInitFunction) (void);

ORealDynamicLoader::ORealDynamicLoader(ORealDynamicLoader ** ppSetToZeroInDestructor_,
                       const rtl::OUString& moduleName,
                       const rtl::OUString& initFunction,
                       void* pApi,
                       oslModule pModule)
    : m_pApi(pApi)
    , m_refCount(1)
    , m_pModule(pModule)
    , m_strModuleName(moduleName)
    , m_strInitFunction(initFunction)
    , ppSetToZeroInDestructor( ppSetToZeroInDestructor_ )
{
}

ORealDynamicLoader* ORealDynamicLoader::newInstance(ORealDynamicLoader ** ppSetToZeroInDestructor,
                                  const rtl::OUString& moduleName,
                                  const rtl::OUString& initFunction)
{
    ApiInitFunction initFunc;
    oslModule pModule = osl_loadModule(moduleName.pData, SAL_LOADMODULE_DEFAULT);

    if ( !pModule )
    {
        return NULL;
    }

    initFunc = (ApiInitFunction)osl_getFunctionSymbol(
        pModule, initFunction.pData);

    if ( !initFunc )
    {
        osl_unloadModule(pModule);
        return NULL;
    }

    return(new ORealDynamicLoader(ppSetToZeroInDestructor, moduleName,
                                 initFunction,
                                 initFunc(),
                                 pModule));
}

ORealDynamicLoader::~ORealDynamicLoader()
{
    // set the address to zero
    if( ppSetToZeroInDestructor )
        *ppSetToZeroInDestructor = 0;

    if (m_pModule)
    {
        osl_unloadModule(m_pModule);
        m_pModule = NULL;
    }
}

sal_uInt32 ORealDynamicLoader::acquire()
{
    return ++m_refCount;
}

sal_uInt32 ORealDynamicLoader::release()
{
    sal_uInt32 nRet = --m_refCount;
    if( nRet == 0 )
        delete this;
    return nRet;
}


void* ORealDynamicLoader::getApi() const
{
    return m_pApi;
}

} // namespace salhelper