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