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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"
/*
static char MTEST_Descrip[] = "Test reading and writing ordered output";
*/
int main(int argc, char *argv[])
{
int errs = 0;
int size, rank, i, *buf, rc;
MPI_File fh;
MPI_Comm comm;
MPI_Status status;
MPI_Request request;
MTest_Init(&argc, &argv);
comm = MPI_COMM_WORLD;
MPI_File_open(comm, (char *) "test.ord",
MPI_MODE_RDWR | MPI_MODE_CREATE | MPI_MODE_DELETE_ON_CLOSE, MPI_INFO_NULL, &fh);
MPI_Comm_size(comm, &size);
MPI_Comm_rank(comm, &rank);
buf = (int *) malloc(size * sizeof(int));
buf[0] = rank;
rc = MPI_File_write_ordered(fh, buf, 1, MPI_INT, &status);
if (rc != MPI_SUCCESS) {
MTestPrintErrorMsg("File_write_ordered", rc);
errs++;
}
/* make sure all writes finish before we seek/read */
MPI_Barrier(comm);
/* Set the individual pointer to 0, since we want to use a iread_all */
MPI_File_seek(fh, 0, MPI_SEEK_SET);
rc = MPI_File_iread_all(fh, buf, size, MPI_INT, &request);
if (rc != MPI_SUCCESS) {
MTestPrintErrorMsg("File_iread_all", rc);
errs++;
}
MPI_Wait(&request, &status);
for (i = 0; i < size; i++) {
if (buf[i] != i) {
errs++;
fprintf(stderr, "%d: buf[%d] = %d\n", rank, i, buf[i]);
}
}
MPI_File_seek_shared(fh, 0, MPI_SEEK_SET);
for (i = 0; i < size; i++)
buf[i] = -1;
MPI_File_read_ordered(fh, buf, 1, MPI_INT, &status);
if (buf[0] != rank) {
errs++;
fprintf(stderr, "%d: buf[0] = %d\n", rank, buf[0]);
}
free(buf);
MPI_File_close(&fh);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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