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27*cdf0e10cSrcweir 
28*cdf0e10cSrcweir #ifndef INCLUDED_CANVAS_BASEMUTEXHELPER_HXX
29*cdf0e10cSrcweir #define INCLUDED_CANVAS_BASEMUTEXHELPER_HXX
30*cdf0e10cSrcweir 
31*cdf0e10cSrcweir #include <osl/mutex.hxx>
32*cdf0e10cSrcweir 
33*cdf0e10cSrcweir 
34*cdf0e10cSrcweir /* Definition of the BaseMutexHelper class */
35*cdf0e10cSrcweir 
36*cdf0e10cSrcweir namespace canvas
37*cdf0e10cSrcweir {
38*cdf0e10cSrcweir     /** Base class, deriving from ::comphelper::OBaseMutex and
39*cdf0e10cSrcweir         initializing its own baseclass with m_aMutex.
40*cdf0e10cSrcweir 
41*cdf0e10cSrcweir         This is necessary to make the CanvasBase, GraphicDeviceBase,
42*cdf0e10cSrcweir         etc. classes freely combinable - letting them perform this
43*cdf0e10cSrcweir         initialization would prohibit deriving e.g. CanvasBase from
44*cdf0e10cSrcweir         GraphicDeviceBase.
45*cdf0e10cSrcweir      */
46*cdf0e10cSrcweir     template< class Base > class BaseMutexHelper : public Base
47*cdf0e10cSrcweir     {
48*cdf0e10cSrcweir     public:
49*cdf0e10cSrcweir         typedef Base BaseType;
50*cdf0e10cSrcweir 
51*cdf0e10cSrcweir         /** Construct BaseMutexHelper
52*cdf0e10cSrcweir 
53*cdf0e10cSrcweir         	This method is the whole purpose of this template:
54*cdf0e10cSrcweir         	initializing a base class with the provided m_aMutex
55*cdf0e10cSrcweir         	member (the WeakComponentImplHelper templates need that,
56*cdf0e10cSrcweir         	as they require the lifetime of the mutex to extend
57*cdf0e10cSrcweir         	theirs).
58*cdf0e10cSrcweir          */
59*cdf0e10cSrcweir         BaseMutexHelper() :
60*cdf0e10cSrcweir             BaseType( m_aMutex )
61*cdf0e10cSrcweir         {
62*cdf0e10cSrcweir         }
63*cdf0e10cSrcweir 
64*cdf0e10cSrcweir protected:
65*cdf0e10cSrcweir 		mutable ::osl::Mutex m_aMutex;
66*cdf0e10cSrcweir     };
67*cdf0e10cSrcweir }
68*cdf0e10cSrcweir 
69*cdf0e10cSrcweir #endif /* INCLUDED_CANVAS_BASEMUTEXHELPER_HXX */
70