libreoffice/cppu/source/uno/IdentityMapping.cxx

/*************************************************************************
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * $RCSfile: IdentityMapping.cxx,v $
 * $Revision: 1.4 $
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * (a copy is included in the LICENSE file that accompanied this code).
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#include "IdentityMapping.hxx"

#include "uno/mapping.h"
#include "uno/environment.hxx"

#include "osl/interlck.h"


using namespace ::com::sun::star;

struct IdentityMapping : public uno_Mapping
{
    sal_Int32        m_nRef;
    uno::Environment m_env;

    IdentityMapping(uno::Environment const & rEnv);
};

extern "C"
{

static void SAL_CALL s_free(uno_Mapping * pMapping) SAL_THROW(())
{
    delete static_cast<IdentityMapping *>(pMapping);
}

static void SAL_CALL s_acquire(uno_Mapping * pMapping) SAL_THROW(())
{
    static rtl::OUString s_purpose;

    if (1 == ::osl_incrementInterlockedCount(&static_cast<IdentityMapping *>(pMapping)->m_nRef))
    {
        uno_registerMapping(
            &pMapping,
            s_free,
            static_cast<IdentityMapping *>(pMapping)->m_env.get(),
            static_cast<IdentityMapping *>(pMapping)->m_env.get(),
            s_purpose.pData);
    }
}

static void SAL_CALL s_release(uno_Mapping * pMapping) SAL_THROW(())
{
    if (!::osl_decrementInterlockedCount(&static_cast<IdentityMapping *>(pMapping )->m_nRef))
        uno_revokeMapping(pMapping);
}

static void SAL_CALL s_mapInterface(uno_Mapping                       * pMapping,
                                    void                             ** ppOut,
                                    void                              * pInterface,
                                    struct _typelib_InterfaceTypeDescription * /*pInterfaceTypeDescr*/)
    SAL_THROW(())
{
    *ppOut = pInterface;

    if (pInterface)
    {
        IdentityMapping * that = static_cast<IdentityMapping *>(pMapping);

        (that->m_env.get()->pExtEnv->acquireInterface)(that->m_env.get()->pExtEnv, pInterface);
    }
}
}


IdentityMapping::IdentityMapping(uno::Environment const & rEnv)
    : m_nRef(0),
      m_env(rEnv)
{
    uno_Mapping::acquire        = s_acquire;
    uno_Mapping::release        = s_release;
    uno_Mapping::mapInterface   = s_mapInterface;
}


uno_Mapping * createIdentityMapping(uno::Environment const & rEnv) SAL_THROW(())
{
    return new IdentityMapping(rEnv);
}