embedserv/source/inprocserv/smartpointer.hxx

   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 #ifndef INCLUDED_EMBEDSERV_SOURCE_INPROCSERV_SMARTPOINTER_HXX
  21 #define INCLUDED_EMBEDSERV_SOURCE_INPROCSERV_SMARTPOINTER_HXX
  22
  23 namespace inprocserv{
  24
  25 void WriteDebugInfo( DWORD pThis, char* pString, DWORD nToWrite );
  26
  27 template< class T > class ComSmart
  28 {
  29     T* m_pInterface;
  30
  31     void OwnRelease()
  32     {
  33         if ( m_pInterface )
  34         {
  35             T* pInterface = m_pInterface;
  36             m_pInterface = nullptr;
  37             pInterface->Release();
  38         }
  39     }
  40
  41 public:
  42     ComSmart()
  43     : m_pInterface( nullptr )
  44     {}
  45
  46     ComSmart( const ComSmart<T>& rObj )
  47     : m_pInterface( rObj.m_pInterface )
  48     {
  49         if ( m_pInterface != nullptr )
  50             m_pInterface->AddRef();
  51     }
  52
  53     explicit ComSmart( T* pInterface )
  54     : m_pInterface( pInterface )
  55     {
  56          if ( m_pInterface != nullptr )
  57             m_pInterface->AddRef();
  58     }
  59
  60     ~ComSmart()
  61     {
  62         OwnRelease();
  63     }
  64
  65     ComSmart& operator=( const ComSmart<T>& rObj )
  66     {
  67         if(this == &rObj)
  68             return *this;
  69
  70         OwnRelease();
  71
  72         m_pInterface = rObj.m_pInterface;
  73
  74         if ( m_pInterface != nullptr )
  75             m_pInterface->AddRef();
  76
  77         return *this;
  78     }
  79
  80     ComSmart<T>& operator=( T* pInterface )
  81     {
  82         OwnRelease();
  83
  84         m_pInterface = pInterface;
  85
  86         if ( m_pInterface != nullptr )
  87             m_pInterface->AddRef();
  88
  89         return *this;
  90     }
  91
  92     explicit operator bool() const
  93     {
  94         return m_pInterface != nullptr;
  95     }
  96
  97     T* get() const
  98     {
  99         return m_pInterface;
 100     }
 101
 102     T& operator*() const
 103     {
 104         return *m_pInterface;
 105     }
 106
 107     T** operator&()
 108     {
 109         OwnRelease();
 110
 111         m_pInterface = nullptr;
 112
 113         return &m_pInterface;
 114     }
 115
 116     T* operator->() const
 117     {
 118         return m_pInterface;
 119     }
 120
 121     BOOL operator==( const ComSmart<T>& rObj ) const
 122     {
 123         return ( m_pInterface == rObj.m_pInterface );
 124     }
 125
 126     BOOL operator!=( const ComSmart<T>& rObj ) const
 127     {
 128         return ( m_pInterface != rObj.m_pInterface );
 129     }
 130
 131     bool operator==( const T* pInterface ) const
 132     {
 133         return ( m_pInterface == pInterface );
 134     }
 135
 136     BOOL operator!=( const T* pInterface ) const
 137     {
 138         return ( m_pInterface != pInterface );
 139     }
 140 };
 141
 142 class CSGuard
 143 {
 144     CRITICAL_SECTION* m_pCriticalSection;
 145
 146 public:
 147     explicit CSGuard( CRITICAL_SECTION* pCS )
 148     : m_pCriticalSection( pCS )
 149     {
 150         if ( m_pCriticalSection )
 151             EnterCriticalSection( m_pCriticalSection );
 152     }
 153
 154     ~CSGuard()
 155     {
 156         if ( m_pCriticalSection )
 157             LeaveCriticalSection( m_pCriticalSection );
 158     }
 159 };
 160
 161 class ULONGGuard
 162 {
 163     ULONG* m_pValue;
 164
 165 public:
 166     explicit ULONGGuard( ULONG* pValue )
 167     : m_pValue( pValue )
 168     {
 169         if ( m_pValue )
 170             (*m_pValue)++;
 171     }
 172
 173     ~ULONGGuard()
 174     {
 175         if ( m_pValue )
 176             (*m_pValue)--;
 177     }
 178 };
 179
 180 } // namespace inprocserv
 181
 182 #endif
 183
 184 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */