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143 lines
3 KiB
C++
143 lines
3 KiB
C++
// Reli.h
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// lots of code here is (c) Bartosz Milewski, 1996, www.relisoft.com
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// The rest is (C) 2002-2004 Royce Mitchell III
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// and released under the LGPL & BSD licenses
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#ifndef __RELI_H
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#define __RELI_H
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////////////////////////////////////////////////////////////////////////////////
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// Assert
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#undef Assert
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#ifdef NDEBUG
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#define Assert(exp) ((void)0)
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#else
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void _wassert (char* szExpr, char* szFile, int line);
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#define Assert(exp) (void)( (exp) || (_wassert(#exp, __FILE__, __LINE__), 0) )
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#endif /* NDEBUG */
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////////////////////////////////////////////////////////////////////////////////
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// Swap
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template <class T>
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void Swap(T a,T b)
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{
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T t = a;
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a = b;
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b = t;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Uncopyable - base class disabling copy ctors
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class Uncopyable
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{
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public:
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Uncopyable(){} // need a default ctor
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private:
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Uncopyable ( const Uncopyable& );
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const Uncopyable& operator = ( const Uncopyable& );
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};
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////////////////////////////////////////////////////////////////////////////////
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// SPtr - Smart Pointer's must be passed by reference or const reference
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template <class T>
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class SPtr : public Uncopyable
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{
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public:
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virtual ~SPtr () { Destroy(); }
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T * operator->() { return _p; }
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T const * operator->() const { return _p; }
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operator T&() { Assert(_p); return *_p; }
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operator const T&() const { Assert(_p); return *_p; }
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void Acquire ( SPtr<T>& t ) { Destroy(); Swap(_p,t._p); }
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void Destroy() { if ( _p ) { delete _p; _p = 0; } }
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protected:
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SPtr (): _p (0) {}
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explicit SPtr (T* p): _p (p) {}
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T * _p;
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private:
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operator T* () { return _p; }
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};
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#define DECLARE_SPTR(cls,init,init2) \
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class S##cls : public SPtr<cls> \
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{ \
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public: \
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S##cls ( cls* p ) : SPtr<cls>(p) {} \
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explicit S##cls init : SPtr<cls> (new cls init2) {} \
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};
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/* Example Usage of DECLARE_SPTR:
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class MyClass
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{
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public: // can be protected
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MyClass ( int i )
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{
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...
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}
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...
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}; DECLARE_SPTR(MyClass,(int i),(i))
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SMyClass ptr(i);
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*/
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#define DECLARE_SPTRV(cls) typedef SPtr<cls> S##cls;
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/* Example Usage of DECLARE_SPTRV:
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class MyAbstractClass
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{
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public: // can be protected
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MyAbstractClass ( int i )
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{
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...
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}
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void MyPureVirtFunc() = 0;
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...
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}; DECLARE_SPTRV(MyAbstractClass)
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SMyAbstractClass ptr ( new MySubClass(i) );
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*/
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#define DECLARE_PTR(cls,init,init2) \
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class Ptr : public SPtr<cls> \
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{ \
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Ptr(cls* p) : SPtr<cls> ( p ) \
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{ \
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} \
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Ptr init : SPtr<cls> ( new cls init2 ) {} \
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};
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/* Example Usage of DECLARE_PTR:
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class MyClass
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{
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DECLARE_PTR(MyClass,(int i),(i))
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public: // can be protected
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MyClass ( int i )
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{
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...
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}
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void MyPureVirtFunc() = 0;
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...
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};
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MyClass::Ptr ptr ( i );
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*/
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#define DECLARE_PTRV(cls) \
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class Ptr : public SPtr<cls> \
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{ \
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Ptr(cls* p) : SPtr<cls> ( p ) \
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{ \
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} \
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};
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/* Example Usage of DECLARE_PTRV:
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class MyAbstractClass
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{
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DECLARE_PTRV(MyAbstractClass)
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public: // can be protected
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MyAbstractClass ( int i )
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{
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...
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}
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void MyPureVirtFunc() = 0;
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...
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};
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MyAbstractClass::Ptr ptr ( new MySubClass(i) );
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*/
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#endif//__RELI_H
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