cppu/source/uno/IdentityMapping.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "IdentityMapping.hxx"
  21
  22 #include <typelib/typedescription.h>
  23 #include <uno/mapping.h>
  24 #include <uno/environment.hxx>
  25 #include <utility>
  26
  27 #include <osl/interlck.h>
  28
  29
  30 using namespace ::com::sun::star;
  31
  32 namespace {
  33
  34 struct IdentityMapping : public uno_Mapping
  35 {
  36     sal_Int32        m_nRef;
  37     uno::Environment m_env;
  38
  39     explicit IdentityMapping(uno::Environment aEnv);
  40 };
  41
  42 }
  43
  44 extern "C"
  45 {
  46
  47 static void s_free(uno_Mapping * pMapping)
  48 {
  49     delete static_cast<IdentityMapping *>(pMapping);
  50 }
  51
  52 static void s_acquire(uno_Mapping * pMapping)
  53 {
  54     static OUString s_purpose;
  55
  56     if (1 == osl_atomic_increment(&static_cast<IdentityMapping *>(pMapping)->m_nRef))
  57     {
  58         uno_registerMapping(
  59             &pMapping,
  60             s_free,
  61             static_cast<IdentityMapping *>(pMapping)->m_env.get(),
  62             static_cast<IdentityMapping *>(pMapping)->m_env.get(),
  63             s_purpose.pData);
  64     }
  65 }
  66
  67 static void s_release(uno_Mapping * pMapping)
  68 {
  69     if (!osl_atomic_decrement(&static_cast<IdentityMapping *>(pMapping )->m_nRef))
  70         uno_revokeMapping(pMapping);
  71 }
  72
  73 static void s_mapInterface(uno_Mapping                       * pMapping,
  74                                     void                             ** ppOut,
  75                                     void                              * pInterface,
  76                                     SAL_UNUSED_PARAMETER typelib_InterfaceTypeDescription * /*pInterfaceTypeDescr*/)
  77 {
  78     *ppOut = pInterface;
  79
  80     if (pInterface)
  81     {
  82         IdentityMapping * that = static_cast<IdentityMapping *>(pMapping);
  83
  84         (that->m_env.get()->pExtEnv->acquireInterface)(that->m_env.get()->pExtEnv, pInterface);
  85     }
  86 }
  87 }
  88
  89
  90 IdentityMapping::IdentityMapping(uno::Environment aEnv)
  91     : m_nRef(0),
  92       m_env(std::move(aEnv))
  93 {
  94     uno_Mapping::acquire        = s_acquire;
  95     uno_Mapping::release        = s_release;
  96     uno_Mapping::mapInterface   = s_mapInterface;
  97 }
  98
  99
 100 uno_Mapping * createIdentityMapping(uno::Environment const & rEnv)
 101 {
 102     return new IdentityMapping(rEnv);
 103 }
 104
 105 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */