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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
#include <string.h>
/*
static char MTEST_Descrip[] = "Locks with no RMA operations";
*/
int main(int argc, char *argv[])
{
int errs = 0;
int rank, size, i;
MPI_Comm comm;
MPI_Win win;
int *winbuf, count;
MTest_Init(&argc, &argv);
comm = MPI_COMM_WORLD;
MPI_Comm_rank(comm, &rank);
MPI_Comm_size(comm, &size);
/* Allocate and initialize buf */
count = 1000;
MPI_Alloc_mem(count * sizeof(int), MPI_INFO_NULL, &winbuf);
MPI_Win_create(winbuf, count * sizeof(int), sizeof(int), MPI_INFO_NULL, comm, &win);
/* Clear winbuf */
memset(winbuf, 0, count * sizeof(int));
/* Note that for i == rank, this is a useful operation - it allows
* the programmer to use direct loads and stores, rather than
* put/get/accumulate, to access the local memory window. */
for (i = 0; i < size; i++) {
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, i, 0, win);
MPI_Win_unlock(i, win);
}
for (i = 0; i < size; i++) {
MPI_Win_lock(MPI_LOCK_SHARED, i, 0, win);
MPI_Win_unlock(i, win);
}
MPI_Win_free(&win);
MPI_Free_mem(winbuf);
/* If this test completes, no error has been found */
/* A more complete test may ensure that local locks in fact block
* remote, exclusive locks */
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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