libreoffice/cppu/source/uno/IdentityMapping.cxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * 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
 *   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 .
 */

#include "IdentityMapping.hxx"

#include <typelib/typedescription.h>
#include <uno/mapping.h>
#include <uno/environment.hxx>

#include <osl/interlck.h>


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

namespace {

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

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

}

extern "C"
{

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

static void s_acquire(uno_Mapping * pMapping)
{
    static OUString s_purpose;

    if (1 == osl_atomic_increment(&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 s_release(uno_Mapping * pMapping)
{
    if (!osl_atomic_decrement(&static_cast<IdentityMapping *>(pMapping )->m_nRef))
        uno_revokeMapping(pMapping);
}

static void s_mapInterface(uno_Mapping                       * pMapping,
                                    void                             ** ppOut,
                                    void                              * pInterface,
                                    SAL_UNUSED_PARAMETER typelib_InterfaceTypeDescription * /*pInterfaceTypeDescr*/)
{
    *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)
{
    return new IdentityMapping(rEnv);
}

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