embedserv/source/inprocserv/smartpointer.hxx

   1 /*************************************************************************
   2  *
   3  *  OpenOffice.org - a multi-platform office productivity suite
   4  *
   5  *  $RCSfile: smartpointer.hxx,v $
   6  *
   7  *  $Revision: 1.1.8.2 $
   8  *
   9  *  last change: $Author: mav $ $Date: 2008/10/30 11:59:06 $
  10  *
  11  *  The Contents of this file are made available subject to
  12  *  the terms of GNU Lesser General Public License Version 2.1.
  13  *
  14  *
  15  *    GNU Lesser General Public License Version 2.1
  16  *    =============================================
  17  *    Copyright 2005 by Sun Microsystems, Inc.
  18  *    901 San Antonio Road, Palo Alto, CA 94303, USA
  19  *
  20  *    This library is free software; you can redistribute it and/or
  21  *    modify it under the terms of the GNU Lesser General Public
  22  *    License version 2.1, as published by the Free Software Foundation.
  23  *
  24  *    This library is distributed in the hope that it will be useful,
  25  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  27  *    Lesser General Public License for more details.
  28  *
  29  *    You should have received a copy of the GNU Lesser General Public
  30  *    License along with this library; if not, write to the Free Software
  31  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  32  *    MA  02111-1307  USA
  33  *
  34  ************************************************************************/
  35
  36 #ifndef _INPROCSERV_SMARTPOINTER_HXX_
  37 #define _INPROCSERV_SMARTPOINTER_HXX_
  38
  39 // #define OWNDEBUG
  40
  41 #ifdef OWNDEBUG
  42 #define WRITEDEBUGINFOINTERN( x ) WriteDebugInfo( (DWORD)this, x, sizeof( x ) )
  43 #define WRITEDEBUGINFO( x ) WRITEDEBUGINFOINTERN( x ":" MY_STRING_LINE "\n" )
  44 #define TO_STRING( x ) #x
  45 #define MACRO_VALUE_TO_STRING( x ) TO_STRING( x )
  46 #define MY_STRING_LINE MACRO_VALUE_TO_STRING( __LINE__ )
  47 #else
  48 #define WRITEDEBUGINFO( x ) void()
  49 #define MY_STRING_LINE
  50 #endif
  51
  52
  53 namespace inprocserv{
  54
  55 void WriteDebugInfo( DWORD pThis, char* pString, DWORD nToWrite );
  56
  57 template< class T > class ComSmart
  58 {
  59     T* m_pInterface;
  60
  61     void OwnRelease()
  62     {
  63         if ( m_pInterface )
  64         {
  65             T* pInterface = m_pInterface;
  66             m_pInterface = NULL;
  67             pInterface->Release();
  68         }
  69     }
  70
  71 public:
  72     ComSmart()
  73     : m_pInterface( NULL )
  74     {}
  75
  76     ComSmart( const ComSmart<T>& rObj )
  77     : m_pInterface( rObj.m_pInterface )
  78     {
  79         if ( m_pInterface != NULL )
  80             m_pInterface->AddRef();
  81     }
  82
  83     ComSmart( T* pInterface )
  84     : m_pInterface( pInterface )
  85     {
  86          if ( m_pInterface != NULL )
  87             m_pInterface->AddRef();
  88     }
  89
  90     ~ComSmart()
  91     {
  92         OwnRelease();
  93     }
  94
  95     ComSmart& operator=( const ComSmart<T>& rObj )
  96     {
  97         OwnRelease();
  98
  99         m_pInterface = rObj.m_pInterface;
 100
 101         if ( m_pInterface != NULL )
 102             m_pInterface->AddRef();
 103
 104         return *this;
 105     }
 106
 107     ComSmart<T>& operator=( T* pInterface )
 108     {
 109         OwnRelease();
 110
 111         m_pInterface = pInterface;
 112
 113         if ( m_pInterface != NULL )
 114             m_pInterface->AddRef();
 115
 116         return *this;
 117     }
 118
 119     operator T*() const
 120     {
 121         return m_pInterface;
 122     }
 123
 124     T& operator*() const
 125     {
 126         return *m_pInterface;
 127     }
 128
 129     T** operator&()
 130     {
 131         OwnRelease();
 132
 133         m_pInterface = NULL;
 134
 135         return &m_pInterface;
 136     }
 137
 138     T* operator->() const
 139     {
 140         return m_pInterface;
 141     }
 142
 143     BOOL operator==( const ComSmart<T>& rObj ) const
 144     {
 145         return ( m_pInterface == rObj.m_pInterface );
 146     }
 147
 148     BOOL operator!=( const ComSmart<T>& rObj ) const
 149     {
 150         return ( m_pInterface != rObj.m_pInterface );
 151     }
 152
 153     BOOL operator==( const T* pInterface ) const
 154     {
 155         return ( m_pInterface == pInterface );
 156     }
 157
 158     BOOL operator!=( const T* pInterface ) const
 159     {
 160         return ( m_pInterface != pInterface );
 161     }
 162 };
 163
 164 class CSGuard
 165 {
 166     CRITICAL_SECTION* m_pCriticalSection;
 167
 168 public:
 169     CSGuard( CRITICAL_SECTION* pCS )
 170     : m_pCriticalSection( pCS )
 171     {
 172         if ( m_pCriticalSection )
 173             EnterCriticalSection( m_pCriticalSection );
 174     }
 175
 176     ~CSGuard()
 177     {
 178         if ( m_pCriticalSection )
 179             LeaveCriticalSection( m_pCriticalSection );
 180     }
 181 };
 182
 183 class ULONGGuard
 184 {
 185     ULONG* m_pValue;
 186
 187 public:
 188     ULONGGuard( ULONG* pValue )
 189     : m_pValue( pValue )
 190     {
 191         if ( m_pValue )
 192             (*m_pValue)++;
 193     }
 194
 195     ~ULONGGuard()
 196     {
 197         if ( m_pValue )
 198             (*m_pValue)--;
 199     }
 200 };
 201
 202 } // namespace inprocserv
 203
 204 #endif
 205