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/RTI/Handle.h
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1 /***********************************************************************
2  The IEEE hereby grants a general, royalty-free license to copy, distribute,
3  display and make derivative works from this material, for all purposes,
4  provided that any use of the material contains the following
5  attribution: "Reprinted with permission from IEEE 1516.1(TM)-2010".
6  Should you require additional information, contact the Manager, Standards
7  Intellectual Property, IEEE Standards Association (stds-ipr@ieee.org).
8 ***********************************************************************/
9 /***********************************************************************
10  IEEE 1516.1 High Level Architecture Interface Specification C++ API
11  File: RTI/Handle.h
12 ***********************************************************************/
13 
14 #ifndef RTI_Handle_h
15 #define RTI_Handle_h
16 
17 #include <RTI/SpecificConfig.h>
18 #include <RTI/Exception.h>
19 #include <RTI/VariableLengthData.h>
20 #include <string>
21 
22 // The following macro is used to define each of the Handle classes
23 // that are used by the RTI's API, e.g. AttributeHandle, ParameterHandle, etc.
24 // Each kind of handle contains the same set of operators and functions, but
25 // each is a separate class for type safety. The encode method can be used to
26 // generate an encoded value for a handle, that can be sent to other federates
27 // as an attribute or parameter. (Use RTIambassador functions to reconstruct a
28 // handle from an encoded value). RTI implementations contain definitions
29 // for each kind of the HandleKindImplementation classes (e.g.
30 // AttributeHandleImplementation), but these classes are not needed by
31 // federate code.
32 
33 #define DEFINE_HANDLE_CLASS(HandleKind) \
34  \
35 /* Forward declaration for the RTI-internal class */ \
36 /* used to implement a specific kind of handle */ \
37 class HandleKind##Implementation; \
38  \
39 /* Each handle class generated by this macro provides the */ \
40 /* following interface */ \
41 class RTI_EXPORT HandleKind \
42 { \
43  public: \
44  \
45  /* Constructs an invalid handle */ \
46  HandleKind (); \
47  \
48  ~HandleKind () \
49  throw(); \
50  \
51  HandleKind ( \
52  HandleKind const & rhs); \
53  \
54  HandleKind & operator= ( \
55  HandleKind const & rhs); \
56  \
57  /* Indicates whether this handle is valid */ \
58  bool isValid () const; \
59  \
60  /* All invalid handles are equivalent */ \
61  bool operator== ( \
62  HandleKind const & rhs) const; \
63  \
64  bool operator!= ( \
65  HandleKind const & rhs) const; \
66  \
67  bool operator< ( \
68  HandleKind const & rhs) const; \
69  \
70  /* Generate a hash value for use in storing handles in a */ \
71  /* in a hash table. */ \
72  /* Note: The hash value may not be unique across two */ \
73  /* separate handle values but it will be equal given two */ \
74  /* separate instances of the same handle value. */ \
75  /* H1 == H2 implies H1.hash() == H2.hash() */ \
76  /* H1 != H2 does not imply H1.hash() != H2.hash() */ \
77  long hash () const; \
78  \
79  /* Generate an encoded value that can be used to send */ \
80  /* handles to other federates in updates or interactions. */ \
81  VariableLengthData encode () const; \
82  \
83  /* Encode into an existing VariableLengthData */ \
84  void encode (VariableLengthData& buffer) const; \
85  \
86  /* Alternate encode for directly filling a buffer */ \
87  size_t encode ( \
88  void* buffer, \
89  size_t bufferSize) const \
90  throw (CouldNotEncode); \
91  \
92  size_t encodedLength () const; \
93  \
94  std::wstring toString () const; \
95  \
96  protected: \
97  \
98  /* Friend declaration for an RTI-internal class that */ \
99  /* can access the implementation of a handle. */ \
100  friend class HandleKind##Friend; \
101  \
102  const HandleKind##Implementation* getImplementation () const; \
103  \
104  HandleKind##Implementation* getImplementation (); \
105  \
106  explicit HandleKind ( \
107  HandleKind##Implementation* impl); \
108  \
109  explicit HandleKind ( \
110  VariableLengthData const & encodedValue); \
111  \
112  HandleKind##Implementation* _impl; \
113  \
114 }; \
115  \
116 /* Output operator for Handles */ \
117 std::wostream RTI_EXPORT & \
118 operator<< ( \
119  std::wostream &, \
120  HandleKind const &);
121 
122 
123 namespace rti1516e
124 {
125 
126 // All of the RTI API's Handle classes are defined
127 // by invoking the macro above.
128 DEFINE_HANDLE_CLASS(FederateHandle)
129 DEFINE_HANDLE_CLASS(ObjectClassHandle)
130 DEFINE_HANDLE_CLASS(InteractionClassHandle)
131 DEFINE_HANDLE_CLASS(ObjectInstanceHandle)
132 DEFINE_HANDLE_CLASS(AttributeHandle)
133 DEFINE_HANDLE_CLASS(ParameterHandle)
134 DEFINE_HANDLE_CLASS(DimensionHandle)
135 DEFINE_HANDLE_CLASS(MessageRetractionHandle)
136 DEFINE_HANDLE_CLASS(RegionHandle)
137 
138 }
139 
140 #endif // RTI_Handle_h
141 
Document ID: Generated on Wed Mar 11 20:26:49 EDT 2015 from SVN revision 150939
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