| Geant4 Cross Reference |
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
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14 // * regarding this software system or assume any liability for its *
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18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
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24 // ********************************************************************
25 //
26 #ifndef G4CrossSectionFactory_h
27 #define G4CrossSectionFactory_h 1
28
29
30 #include "globals.hh"
31 #include "G4VCrossSectionDataSet.hh"
32 #include "G4CrossSectionFactoryRegistry.hh"
33 #include "G4Threading.hh"
34
35 class G4VBaseXSFactory
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:
49 G4CrossSectionFactory(const G4String& name)
50 {
51 G4CrossSectionFactoryRegistry::Instance()->Register(name,this);
52 }
53
54 virtual G4VCrossSectionDataSet* Instantiate()
55 {
56 G4ExceptionDescription msg;
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
69 G4CrossSectionFactory(const G4String& name)
70 {
71 G4CrossSectionFactoryRegistry::Instance()->Register(name,this);
72 }
73
74 virtual G4VCrossSectionDataSet* Instantiate()
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:
85 G4CrossSectionFactory(const G4String& name)
86 {
87 G4CrossSectionFactoryRegistry::Instance()->Register(name,this);
88 }
89
90 virtual G4VCrossSectionDataSet* Instantiate()
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 {
101 G4CrossSectionFactory(const G4String& name)
102 {
103 G4CrossSectionFactoryRegistry::Instance()->Register(name,this);
104 }
105
106 virtual G4VCrossSectionDataSet* Instantiate()
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
133