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G4CrossSectionFactory.hh
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26 #ifndef G4CrossSectionFactory_h
27 #define G4CrossSectionFactory_h 1
28 
29 
30 #include "globals.hh"
33 #include "G4Threading.hh"
34 
36 {
37 
38 public:
39 
40  virtual G4VCrossSectionDataSet* Instantiate() = 0;
41 
42 };
43 
44 
45 //Generic template XS-factory
46 template <typename T, int mode> class G4CrossSectionFactory : public G4VBaseXSFactory
47 {
48 public:
50  {
52  }
53 
55  {
57  msg<<"Factory mode: "<<mode<<" not supported!";
58  G4Exception("G4CrossSectionFactory::Instantiate","CrossSectionFactory001",FatalException,msg);
59  return static_cast<T*>(0);
60  }
61 };
62 
63 //Partial specialized template for non-singleton non-shared factory
64 // each call to Instantiate creates a new XS
65 template <typename T> class G4CrossSectionFactory<T,0> : public G4VBaseXSFactory
66 {
67 public:
68 
70  {
72  }
73 
75  {
76  return new T();
77  }
78 };
79 
80 //Partial specialized template for singleton, shared factory
81 // each call to Instantiate returns pointer to static object
82 template <typename T> class G4CrossSectionFactory<T,1> : public G4VBaseXSFactory
83 {
84 public:
86  {
88  }
89 
91  {
92  static T* shared = new T();
93  return shared;
94  }
95 };
96 
97 //Partial specialized template for singleton, shared factory
98 // each call to Instantiate returns pointer to static thread-local object
99 template <typename T> class G4CrossSectionFactory<T,2> : public G4VBaseXSFactory
100 {
102  {
104  }
105 
107  {
108  static G4ThreadLocal T* shared = new T();
109  return shared;
110  }
111 };
112 
113 
114 #define G4_BASE_DECLARE_XS_FACTORY(cross_section, flag) \
115  const G4CrossSectionFactory<cross_section,flag>& cross_section##Factory = G4CrossSectionFactory<cross_section,flag>(cross_section::Default_Name())
116 
117 #define G4_BASE_REFERENCE_XS_FACTORY(cross_section,flag) \
118  class cross_section; \
119  extern const G4CrossSectionFactory<cross_section,flag>& cross_section##Factory; \
120  const G4CrossSectionFactory<cross_section,flag>& cross_section##FactoryRef = cross_section##Factory
121 
122 //Macros to help define and reference factories
123 #define G4_DECLARE_XS_FACTORY(cross_section) G4_BASE_DECLARE_XS_FACTORY(cross_section,0)
124 #define G4_DECLARE_SHAREDXS_FACTORY(cross_section) G4_BASE_DECLARE_XS_FACTORY(cross_section,1)
125 #define G4_DECLARE_SHAREDTLSXS_FACTORY(cross_section) G4_BASE_DECLARE_XS_FACTORY(cross_section,2)
126 
127 
128 #define G4_REFERENCE_XS_FACTORY(cross_section) G4_BASE_REFERENCE_XS_FACTORY(cross_section,0)
129 #define G4_REFERENCE_SHAREDXS_FACTORY(cross_section) G4_BASE_REFERENCE_XS_FACTORY(cross_section,1)
130 #define G4_REFERENCE_SHAREDTLSXS_FACTORY(cross_section) G4_BASE_REFERENCE_XS_FACTORY(cross_section,2)
131 
132 #endif