framework/inc/helper/shareablemutex.hxx

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  30
  31 #ifndef __FRAMEWORK_HELPER_SHAREABLEMUTEX_HXX_
  32 #define __FRAMEWORK_HELPER_SHAREABLEMUTEX_HXX_
  33
  34 #include <osl/interlck.h>
  35 #include <osl/mutex.hxx>
  36
  37 namespace framework
  38 {
  39
  40 class ShareableMutex
  41 {
  42     public:
  43         ShareableMutex();
  44         ShareableMutex( const ShareableMutex& rShareableMutex );
  45         const ShareableMutex& operator=( const ShareableMutex& rShareableMutex );
  46
  47         ~ShareableMutex();
  48
  49         void acquire();
  50         void release();
  51         ::osl::Mutex& getShareableOslMutex();
  52
  53     private:
  54         struct MutexRef
  55         {
  56             MutexRef() : m_refCount(0) {}
  57             void acquire()
  58             {
  59                 osl_incrementInterlockedCount( &m_refCount );
  60             }
  61
  62             void release()
  63             {
  64                 if ( osl_decrementInterlockedCount( &m_refCount ) == 0 )
  65                     delete this;
  66             }
  67
  68             oslInterlockedCount m_refCount;
  69             osl::Mutex          m_oslMutex;
  70         };
  71
  72         MutexRef* pMutexRef;
  73 };
  74
  75 class ShareGuard
  76 {
  77     public:
  78         ShareGuard( ShareableMutex& rShareMutex ) :
  79             m_rShareMutex( rShareMutex )
  80         {
  81             m_rShareMutex.acquire();
  82         }
  83
  84         ~ShareGuard()
  85         {
  86             m_rShareMutex.release();
  87         }
  88
  89     private:
  90         ShareGuard();
  91         ShareGuard& operator=( const ShareGuard& );
  92
  93         ShareableMutex& m_rShareMutex;
  94 };
  95
  96 }
  97
  98 #endif // #ifndef __FRAMEWORK_HELPER_SHAREABLEMUTEX_HXX_