| Geant4 Cross Reference |
1 // 1
2 // *******************************************
3 // * License and Disclaimer
4 // *
5 // * The Geant4 software is copyright of th
6 // * the Geant4 Collaboration. It is provided
7 // * conditions of the Geant4 Software License
8 // * LICENSE and available at http://cern.ch/
9 // * include a list of copyright holders.
10 // *
11 // * Neither the authors of this software syst
12 // * institutes,nor the agencies providing fin
13 // * work make any representation or warran
14 // * regarding this software system or assum
15 // * use. Please see the license in the file
16 // * for the full disclaimer and the limitatio
17 // *
18 // * This code implementation is the result
19 // * technical work of the GEANT4 collaboratio
20 // * By using, copying, modifying or distri
21 // * any work based on the software) you ag
22 // * use in resulting scientific publicati
23 // * acceptance of all terms of the Geant4 Sof
24 // *******************************************
25 //
26 // G4GeomSplitter
27 //
28 // Class description:
29 //
30 // Utility template class for splitting of RW
31 // classes: G4LogicalVolume, G4Region, G4VPhys
32 // G4PolyhedraSide, G4PVReplica.
33
34 // Author: X.Dong - Initial version from autom
35 // -------------------------------------------
36 #ifndef G4GEOMSPLITTER_HH
37 #define G4GEOMSPLITTER_HH
38
39 #include "globals.hh"
40 #include "geomwdefs.hh"
41 #include "G4AutoLock.hh"
42
43 template <class T> // T is the private data f
44 class G4GeomSplitter
45 {
46 public:
47
48 G4GeomSplitter()
49 : sharedOffset(nullptr)
50 {
51 G4MUTEXINIT(mutex);
52 }
53
54 T* Reallocate(G4int size)
55 {
56 totalspace = size;
57 return (T *) std::realloc(offset, total
58 }
59
60 G4int CreateSubInstance()
61 // Invoked by the master or work thread
62 // whenever a new split class instance i
63 {
64 G4AutoLock l(&mutex);
65 ++totalobj;
66 if (totalobj > totalspace)
67 {
68 offset = Reallocate(totalspace+512);
69 if (offset == nullptr)
70 {
71 G4Exception("G4GeomSPlitter::Create
72 "OutOfMemory", FatalExc
73 }
74 sharedOffset = offset;
75 }
76 return (totalobj - 1);
77 }
78
79 void CopyMasterContents()
80 {
81 G4AutoLock l(&mutex);
82 std::memcpy(offset, sharedOffset, totals
83 }
84
85 void SlaveCopySubInstanceArray()
86 // Invoked by each worker thread to copy
87 // from the master thread.
88 {
89 G4AutoLock l(&mutex);
90 if (offset != nullptr) { return; }
91 offset = Reallocate(totalspace);
92 if (offset == nullptr)
93 {
94 G4Exception("G4GeomSplitter::SlaveCopy
95 "OutOfMemory", FatalExcept
96 }
97 l.unlock();
98 CopyMasterContents();
99 }
100
101 void SlaveInitializeSubInstance()
102 // Invoked by each worker thread to crea
103 // initialize each subinstance using a p
104 // the subclass.
105 {
106 G4AutoLock l(&mutex);
107 if (offset != nullptr) { return; }
108 offset = Reallocate(totalspace);
109
110 if (offset == nullptr)
111 {
112 G4Exception("G4GeomSplitter::SlaveInit
113 "OutOfMemory", FatalExcept
114 }
115
116 for (G4int i=0 ; i<totalspace; ++i)
117 {
118 offset[i].initialize();
119 }
120 }
121
122 void SlaveReCopySubInstanceArray()
123 // Invoked by each worker thread at star
124 // to copy again all the subinstance arr
125 // To cope with user's changes in Geomet
126 // in a volume
127 {
128 if (offset == nullptr)
129 {
130 SlaveInitializeSubInstance();
131 G4Exception("G4GeomSPlitter::SlaveReCo
132 "MissingInitialisation", J
133 "Must be called after Init
134 }
135 CopyMasterContents();
136 }
137
138 void FreeSlave()
139 // Invoked by all threads to free the su
140 {
141 if (offset == nullptr) { return; }
142 std::free( offset );
143 offset = nullptr;
144 }
145
146 // Extension - to allow sharing of workspa
147
148 T* GetOffset() { return offset; }
149
150 void UseWorkArea( T* newOffset )
151 // Use recycled work area - which was cr
152 {
153 if( (offset!=nullptr) && (offset!=newOff
154 {
155 G4Exception("G4GeomSplitter::UseWorks
156 "TwoWorkspaces", FatalExc
157 "Thread already has works
158 }
159 offset= newOffset;
160 }
161
162 T* FreeWorkArea()
163 // Detach this thread from this Location
164 // The object which calls this method is
165 {
166 T* offsetRet = offset;
167 offset = nullptr;
168 return offsetRet;
169 }
170
171 public:
172
173 G4GEOM_DLL static G4ThreadLocal T* offset;
174
175 private:
176
177 G4int totalobj{0};
178 G4int totalspace{0};
179 T* sharedOffset;
180 G4Mutex mutex;
181 };
182
183 template <typename T> G4ThreadLocal T* G4GeomS
184
185 #endif
186