TempRef.h

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00006  * 
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00014  * 
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00018  *   Redistributions in binary form must reproduce the above copyright
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00038 
00039 #ifndef _OASYS_TEMPREF_H_
00040 #define _OASYS_TEMPREF_H_
00041 
00042 #include "../debug/DebugUtils.h"
00043 
00044 namespace oasys {
00045 
00057 template <typename _Type>
00058 class TempRef {
00059 public:
00063     TempRef(const char* what1, const char* what2 = "")
00064         : object_(NULL), what1_(what1), what2_(what2)
00065     {
00066     }
00067     
00071     TempRef(_Type* object, const char* what1, const char* what2 = "")
00072         : object_(object), what1_(what1), what2_(what2)
00073     {
00074     }
00075 
00079     TempRef(const TempRef& other)
00080     {
00081         object_ = other.object();
00082         other.release();
00083     }
00084     
00088     ~TempRef() {
00089         if (object_ != NULL) {
00090             PANIC("TempRef %s %s destructor fired but object still exists!!",
00091                   what1_, what2_);
00092         }
00093     }
00094 
00098     TempRef& operator=(const TempRef<_Type>& other)
00099     {
00100         object_ = other.object();
00101         other.release();
00102         return *this;
00103     }
00104 
00108     TempRef& operator=(_Type* object)
00109     {
00110         ASSERTF(object_ == NULL,
00111                 "TempRef can only assign to null reference");
00112         object_ = object;
00113         return *this;
00114     }
00115 
00119     _Type* object() const {
00120         return object_;
00121     }
00122     
00126     _Type* operator->() const
00127     {
00128         return object_;
00129     }
00130 
00134     _Type& operator*() const
00135     {
00136         return *object_;
00137     }
00138 
00143     void release() const {
00144         object_ = NULL;
00145     }
00146 
00150     bool operator==(_Type* o)
00151     {
00152         return (object_ == o);
00153     }
00154     
00158     bool operator!=(_Type* o)
00159     {
00160         return (object_ != o);
00161     }
00162 
00163     const char* what1() const { return what1_; } 
00164     const char* what2() const { return what2_; }
00165     
00166 private:
00170     mutable _Type* object_;
00171 
00175     const char *what1_, *what2_;
00176 };
00177 
00178 } // namespace oasys
00179 
00180 #endif /* _OASYS_TEMPREF_H_ */

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