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       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_FRAMEWORK_INC_HELPER_SHAREABLEMUTEX_HXX
      21             : #define INCLUDED_FRAMEWORK_INC_HELPER_SHAREABLEMUTEX_HXX
      22             : 
      23             : #include <osl/interlck.h>
      24             : #include <osl/mutex.hxx>
      25             : #include <fwidllapi.h>
      26             : 
      27             : namespace framework
      28             : {
      29             : 
      30             : class FWI_DLLPUBLIC ShareableMutex
      31             : {
      32             :     public:
      33             :         ShareableMutex();
      34             :         ShareableMutex( const ShareableMutex& rShareableMutex );
      35             :         const ShareableMutex& operator=( const ShareableMutex& rShareableMutex );
      36             : 
      37             :         ~ShareableMutex();
      38             : 
      39             :         void acquire();
      40             :         void release();
      41             : 
      42             :     private:
      43           0 :         struct MutexRef
      44             :         {
      45           0 :             MutexRef() : m_refCount(0) {}
      46           0 :             void acquire()
      47             :             {
      48           0 :                 osl_atomic_increment( &m_refCount );
      49           0 :             }
      50             : 
      51           0 :             void release()
      52             :             {
      53           0 :                 if ( osl_atomic_decrement( &m_refCount ) == 0 )
      54           0 :                     delete this;
      55           0 :             }
      56             : 
      57             :             oslInterlockedCount m_refCount;
      58             :             osl::Mutex          m_oslMutex;
      59             :         };
      60             : 
      61             :         MutexRef* pMutexRef;
      62             : };
      63             : 
      64             : class ShareGuard
      65             : {
      66             :     public:
      67           0 :         ShareGuard( ShareableMutex& rShareMutex ) :
      68           0 :             m_rShareMutex( rShareMutex )
      69             :         {
      70           0 :             m_rShareMutex.acquire();
      71           0 :         }
      72             : 
      73           0 :         ~ShareGuard()
      74             :         {
      75           0 :             m_rShareMutex.release();
      76           0 :         }
      77             : 
      78             :     private:
      79             :         ShareGuard();
      80             :         ShareGuard& operator=( const ShareGuard& );
      81             : 
      82             :         ShareableMutex& m_rShareMutex;
      83             : };
      84             : 
      85             : }
      86             : 
      87             : #endif // INCLUDED_FRAMEWORK_INC_HELPER_SHAREABLEMUTEX_HXX
      88             : 
      89             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */