salhelper/source/dynload.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 <salhelper/dynload.hxx>
  21
  22 namespace salhelper
  23 {
  24
  25 typedef void* (*ApiInitFunction) ();
  26
  27 ORealDynamicLoader::ORealDynamicLoader(ORealDynamicLoader ** ppSetToZeroInDestructor_,
  28                        const OUString& moduleName,
  29                        const OUString& initFunction,
  30                        void* pApi,
  31                        oslModule pModule)
  32     : m_pApi(pApi)
  33     , m_refCount(1)
  34     , m_pModule(pModule)
  35     , m_strModuleName(moduleName)
  36     , m_strInitFunction(initFunction)
  37     , ppSetToZeroInDestructor( ppSetToZeroInDestructor_ )
  38 {
  39 }
  40
  41 ORealDynamicLoader* ORealDynamicLoader::newInstance(ORealDynamicLoader ** ppSetToZeroInDestructor,
  42                                   const OUString& moduleName,
  43                                   const OUString& initFunction)
  44 {
  45 #ifdef DISABLE_DYNLOADING
  46     (void) ppSetToZeroInDestructor;
  47     (void) moduleName;
  48     (void) initFunction;
  49
  50     return NULL;
  51 #else
  52     ApiInitFunction initFunc;
  53     oslModule pModule = osl_loadModule(moduleName.pData, SAL_LOADMODULE_DEFAULT);
  54
  55     if ( !pModule )
  56     {
  57         return nullptr;
  58     }
  59
  60     initFunc = reinterpret_cast<ApiInitFunction>(osl_getFunctionSymbol(
  61         pModule, initFunction.pData));
  62
  63     if ( !initFunc )
  64     {
  65         osl_unloadModule(pModule);
  66         return nullptr;
  67     }
  68
  69     return(new ORealDynamicLoader(ppSetToZeroInDestructor, moduleName,
  70                                  initFunction,
  71                                  initFunc(),
  72                                  pModule));
  73 #endif
  74 }
  75
  76 ORealDynamicLoader::~ORealDynamicLoader()
  77 {
  78     // set the address to zero
  79     if( ppSetToZeroInDestructor )
  80         *ppSetToZeroInDestructor = nullptr;
  81
  82     if (m_pModule)
  83     {
  84 #ifndef DISABLE_DYNLOADING
  85         osl_unloadModule(m_pModule);
  86 #endif
  87         m_pModule = nullptr;
  88     }
  89 }
  90
  91 sal_uInt32 ORealDynamicLoader::acquire()
  92 {
  93     return ++m_refCount;
  94 }
  95
  96 sal_uInt32 ORealDynamicLoader::release()
  97 {
  98     sal_uInt32 nRet = --m_refCount;
  99     if( nRet == 0 )
 100         delete this;
 101     return nRet;
 102 }
 103
 104
 105 void* ORealDynamicLoader::getApi() const
 106 {
 107     return m_pApi;
 108 }
 109
 110 } // namespace salhelper
 111
 112 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */