main
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Last change
on this file was ea777aa, checked in by Alex Wilton <awilton@…>, 3 years ago |
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Moved examples, include, build_default.properties, common.xml, and README out from dev.civl.com into the root of the repo.
git-svn-id: svn://vsl.cis.udel.edu/civl/trunk@5704 fb995dde-84ed-4084-dfe6-e5aef3e2452c
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Property mode
set to
100644
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File size:
671 bytes
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| 1 | #include <mpi.h>
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| 2 |
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| 3 | int size, rank;
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| 4 | int root;
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| 5 | int x;
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| 6 |
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| 7 | /*@ \mpi_collective(MPI_COMM_WORLD, P2P):
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| 8 | @ requires rank == \mpi_comm_rank;
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| 9 | @ requires size == \mpi_comm_size;
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| 10 | @ requires 0 <= root && root < \mpi_comm_size;
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| 11 | @ requires \mpi_agree(root);
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| 12 | @ requires datatype == MPI_INT;
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| 13 | @ ensures \on(root, x) == size - 1 ||
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| 14 | @ (\on(root, x) == size - 2 && size - 1 == root);
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| 15 | @*/
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| 16 | int wildcard(MPI_Datatype datatype) {
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| 17 | if (rank == root) {
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| 18 | for (int i = 0; i < size; i++)
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| 19 | if (i != root)
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| 20 | MPI_Recv(&x, 1, datatype, i, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
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| 21 | } else
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| 22 | MPI_Send(&rank, 1, datatype, root, 0, MPI_COMM_WORLD);
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| 23 | return 0;
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| 24 | }
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