mutex.hxx

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#ifndef INCLUDED_OSL_MUTEX_HXX
#define INCLUDED_OSL_MUTEX_HXX

#include <osl/mutex.h>


namespace osl
{
    class SAL_WARN_UNUSED Mutex {

    public:
        Mutex()
        {
            mutex = osl_createMutex();
        }

        ~Mutex()
        {
            osl_destroyMutex(mutex);
        }

        bool acquire()
        {
            return osl_acquireMutex(mutex);
        }

        bool tryToAcquire()
        {
            return osl_tryToAcquireMutex(mutex);
        }

        bool release()
        {
            return osl_releaseMutex(mutex);
        }

        static Mutex * getGlobalMutex()
        {
            return (Mutex *)osl_getGlobalMutex();
        }

    private:
        oslMutex mutex;

        Mutex(const Mutex&);

        Mutex(oslMutex Mutex);

        Mutex& operator= (const Mutex&);

        Mutex& operator= (oslMutex);
    };

    template<class T>
    class Guard
    {
    private:
        Guard( const Guard& );
        const Guard& operator = ( const Guard& );

    protected:
        T * pT;
    public:

        Guard(T * pT_) : pT(pT_)
        {
            pT->acquire();
        }

        Guard(T & t) : pT(&t)
        {
            pT->acquire();
        }

        ~Guard()
        {
            pT->release();
        }
    };

    template<class T>
    class ClearableGuard
    {
    private:
        ClearableGuard( const ClearableGuard& );
        const ClearableGuard& operator = ( const ClearableGuard& );
    protected:
        T * pT;
    public:

        ClearableGuard(T * pT_) : pT(pT_)
        {
            pT->acquire();
        }

        ClearableGuard(T & t) : pT(&t)
        {
            pT->acquire();
        }

        ~ClearableGuard()
        {
            if (pT)
                pT->release();
        }

        void clear()
        {
            if(pT)
            {
                pT->release();
                pT = NULL;
            }
        }
    };

    template< class T >
    class ResettableGuard : public ClearableGuard< T >
    {
    private:
        ResettableGuard(ResettableGuard &); // not defined
        void operator =(ResettableGuard &); // not defined

    protected:
        T* pResetT;
    public:
        ResettableGuard( T* pT_ ) :
                ClearableGuard<T>( pT_ ),
                pResetT( pT_ )
        {}

        ResettableGuard( T& rT ) :
                ClearableGuard<T>( rT ),
                pResetT( &rT )
        {}

        void reset()
        {
            if( pResetT )
            {
                this->pT = pResetT;
                this->pT->acquire();
            }
        }
    };

    typedef Guard<Mutex> MutexGuard;
    typedef ClearableGuard<Mutex> ClearableMutexGuard;
    typedef ResettableGuard< Mutex > ResettableMutexGuard;
}

#endif // INCLUDED_OSL_MUTEX_HXX

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