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1029.cpp
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41
44#ifdef HAVE_TEUCHOS_MPI
46#endif // HAVE_TEUCHOS_MPI
48
49
50TEUCHOS_UNIT_TEST( Comm, Issue1029 )
51{
52 using Teuchos::Comm;
53 using Teuchos::outArg;
54 using Teuchos::RCP;
56 using Teuchos::reduceAll;
57 using std::endl;
58
59 RCP<const Comm<int> > comm = Teuchos::DefaultComm<int>::getComm ();
60
61 const int numProcs = comm->getSize ();
62 TEST_ASSERT( numProcs > 1 );
63 if (numProcs < 2) {
64 out << "This test requires at least 2 MPI processes." << endl;
65 return;
66 }
67
68 const int myRank = comm->getRank ();
69
70 // Use a mix of positive, negative, and zero values, so that neither
71 // min nor max would give the full picture.
72 int lclResult;
73 if (myRank == 0) {
74 lclResult = 0;
75 }
76 else if (myRank == 1) {
77 lclResult = -1;
78 }
79 else {
80 lclResult = 1;
81 }
82 int gblResult = 0; // output argument
83 reduceAll<int, int> (*comm, REDUCE_BOR, lclResult, outArg (gblResult));
84 TEST_EQUALITY( gblResult, -1 );
85}
86
Implementation of Teuchos wrappers for MPI.
#define TEST_ASSERT(v1)
Assert the given statement is true.
#define TEST_EQUALITY(v1, v2)
Assert the equality of v1 and v2.
Unit testing support.
#define TEUCHOS_UNIT_TEST(TEST_GROUP, TEST_NAME)
Macro for defining a (non-templated) unit test.
Abstract interface for distributed-memory communication.
static Teuchos::RCP< const Comm< OrdinalType > > getComm()
Return the default global communicator.
Smart reference counting pointer class for automatic garbage collection.
@ REDUCE_BOR
Bitwise OR.