Tpetra parallel linear algebra Version of the Day
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Tpetra_Details_isInterComm.cpp
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4// Tpetra: Templated Linear Algebra Services Package
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41
43#include "Teuchos_Comm.hpp"
44#ifdef HAVE_TPETRACORE_MPI
46#endif // HAVE_TPETRACORE_MPI
47#include <stdexcept> // std::logic_error
48
49namespace Tpetra {
50namespace Details {
51
52#ifdef HAVE_TPETRACORE_MPI
53bool
54isInterComm (const Teuchos::Comm<int>& comm)
55{
56 MPI_Comm rawMpiComm = extractMpiCommFromTeuchos (comm);
57 int flag = 0;
58 // This is a "local routine" (MPI 3.1, Section 6.6.1, p. 259).
59 (void) MPI_Comm_test_inter (rawMpiComm, &flag);
60 return flag != 0;
61}
62
63#else // NOT HAVE_TPETRACORE_MPI
64
65bool
66isInterComm (const Teuchos::Comm<int>& /* comm */ )
67{
68 return false;
69}
70#endif // HAVE_TPETRACORE_MPI
71
72} // namespace Details
73} // namespace Tpetra
74
Declaration of Tpetra::Details::extractMpiCommFromTeuchos.
Declaration of Tpetra::Details::isInterComm.
Implementation details of Tpetra.
bool isInterComm(const Teuchos::Comm< int > &)
Return true if and only if the input communicator wraps an MPI intercommunicator.
Namespace Tpetra contains the class and methods constituting the Tpetra library.