FreeFOAM The Cross-Platform CFD Toolkit
globalIndex.C
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25 
26 #include <OpenFOAM/globalIndex.H>
27 
28 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
29 
30 Foam::globalIndex::globalIndex(const label localSize)
31 :
32  offsets_(Pstream::nProcs())
33 {
34  labelList localSizes(Pstream::nProcs());
35  localSizes[Pstream::myProcNo()] = localSize;
36  Pstream::gatherList(localSizes);
37  Pstream::scatterList(localSizes); // just to balance out comms
38 
39  label offset = 0;
40  forAll(offsets_, procI)
41  {
42  label oldOffset = offset;
43  offset += localSizes[procI];
44 
45  if (offset < oldOffset)
46  {
47  FatalErrorIn("globalIndex::globalIndex(const label)")
48  << "Overflow : sum of sizes " << localSizes
49  << " exceeds capability of label (" << labelMax
50  << "). Please recompile with larger datatype for label."
51  << exit(FatalError);
52  }
53  offsets_[procI] = offset;
54  }
55 }
56 
57 
59 {
60  is >> offsets_;
61 }
62 
63 
64 // * * * * * * * * * * * * * * * Friend Operators * * * * * * * * * * * * * //
65 
67 {
68  return is >> gi.offsets_;
69 }
70 
71 
73 {
74  return os << gi.offsets_;
75 }
76 
77 
78 // ************************ vim: set sw=4 sts=4 et: ************************ //