diff options
| -rw-r--r-- | include/tools/ref.hxx | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/include/tools/ref.hxx b/include/tools/ref.hxx index cc52da44d297..6a8a01d237f3 100644 --- a/include/tools/ref.hxx +++ b/include/tools/ref.hxx @@ -28,6 +28,7 @@ namespace tools { +/** T must be a class that extends SvRefBase */ template<typename T> class SvRef { public: SvRef(): pObj(0) {} @@ -142,6 +143,7 @@ public: }; +/** Classes that want to be referenced-counted via SvRef<T>, should extend this base class */ class TOOLS_DLLPUBLIC SvRefBase { static const sal_uIntPtr SV_NO_DELETE_REFCOUNT = 0x80000000; @@ -184,27 +186,36 @@ public: { return nRefCount; } }; +/** We only have one weak reference in LO, in include/sfx2/frame.hxx, class SfxFrameWeak. + This acts as a intermediary between SfxFrameWeak and SfxFrame_Impl. +*/ class SvCompatWeakHdl : public SvRefBase { friend class SvCompatWeakBase; void* _pObj; + SvCompatWeakHdl( void* pObj ) : _pObj( pObj ) {} public: - void ResetWeakBase( ) { _pObj = 0; } + void ResetWeakBase( ) { _pObj = 0; } void* GetObj() { return _pObj; } }; +/** We only have one place that extends this, in sfx2/source/view/impframe.hxx, class SfxFrame_Impl, + its function is to notify the SvCompatWeakHdl when an SfxFrame_Impl object is deleted. +*/ class SvCompatWeakBase { tools::SvRef<SvCompatWeakHdl> _xHdl; public: - SvCompatWeakHdl* GetHdl() { return _xHdl; } - - // does not use initializer due to compiler warnings + // Does not use initializer due to compiler warnings, + // because the lifetime of the _xHdl object can exceed the lifetime of this class. SvCompatWeakBase( void* pObj ) { _xHdl = new SvCompatWeakHdl( pObj ); } + ~SvCompatWeakBase() { _xHdl->ResetWeakBase(); } + + SvCompatWeakHdl* GetHdl() { return _xHdl; } }; #define SV_DECL_COMPAT_WEAK( ClassName ) \ |