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:
426 bytes
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| [4e62451] | 1 | #include<mpi.h>
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| [9d7c12b] | 2 | #include<assert.h>
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| [4e62451] | 3 |
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| 4 | /*@
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| [9d7c12b] | 5 | @ \mpi_collective(MPI_COMM_WORLD, P2P):
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| [9074a6e] | 6 | @ requires \mpi_comm_rank == x;
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| [4e62451] | 7 | @*/
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| [9d7c12b] | 8 | void exchange(int x) {
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| [ef8e46c] | 9 | int y, nprocs;
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| 10 | int right, left;
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| [9d7c12b] | 11 |
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| [ef8e46c] | 12 | MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
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| 13 | right = (x + 1) % nprocs;
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| 14 | left = (x - 1) % nprocs;
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| 15 | MPI_Sendrecv(&x, 1, MPI_INT, right, 0, &y,
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| 16 | 1, MPI_INT, right, 0,
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| [9d7c12b] | 17 | MPI_COMM_WORLD, MPI_STATUS_IGNORE);
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| [ef8e46c] | 18 | assert(y == left);
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| [4e62451] | 19 | }
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| 20 |
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