package/inc/mutexholder.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.
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   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 __MUTEXHOLDER_HXX_
  21 #define __MUTEXHOLDER_HXX_
  22
  23 #include <osl/mutex.hxx>
  24
  25 class SotMutexHolder
  26 {
  27     ::osl::Mutex m_aMutex;
  28     sal_Int32    m_nRefCount;
  29
  30     public:
  31     SotMutexHolder() : m_nRefCount( 0 ) {}
  32
  33     void AddRef()
  34     {
  35         m_nRefCount++;
  36     }
  37
  38     void ReleaseRef()
  39     {
  40         if ( !--m_nRefCount )
  41             delete this;
  42     }
  43
  44     ::osl::Mutex& GetMutex() { return m_aMutex; }
  45 };
  46
  47 class SotMutexHolderRef
  48 {
  49     SotMutexHolder* m_pHolder;
  50
  51 public:
  52     SotMutexHolderRef()
  53     : m_pHolder( NULL )
  54     {}
  55
  56     SotMutexHolderRef( SotMutexHolder* pHolder )
  57     : m_pHolder( pHolder )
  58     {
  59         if ( m_pHolder )
  60             m_pHolder->AddRef();
  61     }
  62
  63     SotMutexHolderRef( const SotMutexHolderRef& rRef )
  64     : m_pHolder( rRef.m_pHolder )
  65     {
  66         if ( m_pHolder )
  67             m_pHolder->AddRef();
  68     }
  69
  70     ~SotMutexHolderRef()
  71     {
  72         if ( m_pHolder )
  73             m_pHolder->ReleaseRef();
  74     }
  75
  76     SotMutexHolderRef& operator =( const SotMutexHolderRef& rRef )
  77     {
  78         if ( m_pHolder )
  79             m_pHolder->ReleaseRef();
  80
  81         m_pHolder = rRef.m_pHolder;
  82
  83         if ( m_pHolder )
  84             m_pHolder->AddRef();
  85
  86         return *this;
  87     }
  88
  89     SotMutexHolderRef& operator =( SotMutexHolder* pHolder )
  90     {
  91         if ( m_pHolder )
  92             m_pHolder->ReleaseRef();
  93
  94         m_pHolder = pHolder;
  95
  96         if ( m_pHolder )
  97             m_pHolder->AddRef();
  98         return *this;
  99     }
 100
 101     SotMutexHolder* operator ->() const
 102     {
 103         return m_pHolder;
 104     }
 105
 106     SotMutexHolder& operator *() const
 107     {
 108         return *m_pHolder;
 109     }
 110
 111     operator SotMutexHolder*() const
 112     {
 113         return m_pHolder;
 114     }
 115
 116     sal_Bool Is() const
 117     {
 118         return m_pHolder != NULL;
 119     }
 120 };
 121
 122 #endif
 123
 124 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */