38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
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# ifndef SR_SHARED_CLASS_H
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# define SR_SHARED_CLASS_H
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/*! \file sr_shared_class.h
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reference counter for smart-pointer like behavior.
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Note: attention is required to avoid circular references */
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class SrSharedClass
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{ private :
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int _ref;
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protected :
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/*! Constructor initializes the reference counter as 0 */
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SrSharedClass () { _ref=0; };
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/*! Destructor in derived classes should always be declared as
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protected in order to oblige users to call always unref(),
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instead of delete */
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virtual ~SrSharedClass() {};
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public :
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/*! Returns the current reference counter value. */
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int getref () const { return _ref; }
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/*! Increments the reference counter. */
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void ref () { _ref++; }
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/*! Decrements the reference counter (if >0), and if the
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counter becomes 0, the class is automatically self deleted. */
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void unref() { if(_ref>0) _ref--; if(_ref==0) delete this; }
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};
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//============================== end of file ===============================
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# endif // SR_SHARED_CLASS_H
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