dynload.cxx

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 *
 * 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
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 *   except in compliance with the License. You may obtain a copy of
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 */
 
#include <salhelper/dynload.hxx>
 
namespace salhelper
{
 
typedef void* (*ApiInitFunction) ();
 
ORealDynamicLoader::ORealDynamicLoader(ORealDynamicLoader ** ppSetToZeroInDestructor_,
                       const OUString& moduleName,
                       const 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 OUString& moduleName,
                                  const OUString& initFunction)
{
#ifdef DISABLE_DYNLOADING
    (void) ppSetToZeroInDestructor;
    (void) moduleName;
    (void) initFunction;
 
    return NULL;
#else
    ApiInitFunction initFunc;
    oslModule pModule = osl_loadModule(moduleName.pData, SAL_LOADMODULE_DEFAULT);
 
    if ( !pModule )
    {
        return nullptr;
    }
 
    initFunc = reinterpret_cast<ApiInitFunction>(osl_getFunctionSymbol(
        pModule, initFunction.pData));
 
    if ( !initFunc )
    {
        osl_unloadModule(pModule);
        return nullptr;
    }
 
    return(new ORealDynamicLoader(ppSetToZeroInDestructor, moduleName,
                                 initFunction,
                                 initFunc(),
                                 pModule));
#endif
}
 
ORealDynamicLoader::~ORealDynamicLoader()
{
    // set the address to zero
    if( ppSetToZeroInDestructor )
        *ppSetToZeroInDestructor = nullptr;
 
    if (m_pModule)
    {
#ifndef DISABLE_DYNLOADING
        osl_unloadModule(m_pModule);
#endif
        m_pModule = nullptr;
    }
}
 
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
 
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