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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "mpitest.h"
/*
static char MTEST_Descrip[] = "Test file views with MPI_Type_create_resized";
*/
int main(int argc, char **argv)
{
int i, nprocs, len, mpi_errno, buf[2], newbuf[4];
int errs = 0;
MPI_Offset size;
MPI_Aint lb, extent;
MPI_File fh;
char *filename;
MPI_Datatype newtype;
MTest_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
if (nprocs != 1) {
fprintf(stderr, "Run this program on 1 process\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
i = 1;
while ((i < argc) && strcmp("-fname", *argv)) {
i++;
argv++;
}
if (i >= argc) {
len = 8;
filename = (char *) malloc(len + 10);
strcpy(filename, "testfile");
/*
* fprintf(stderr, "\n*# Usage: resized -fname filename\n\n");
* MPI_Abort(MPI_COMM_WORLD, 1);
*/
} else {
argv++;
len = (int) strlen(*argv);
filename = (char *) malloc(len + 1);
strcpy(filename, *argv);
}
MPI_File_delete(filename, MPI_INFO_NULL);
/* create a resized type comprising an integer with an lb at sizeof(int) and extent = 3*sizeof(int) */
lb = sizeof(int);
extent = 3 * sizeof(int);
MPI_Type_create_resized(MPI_INT, lb, extent, &newtype);
MPI_Type_commit(&newtype);
/* initialize the file */
MPI_File_open(MPI_COMM_WORLD, filename, MPI_MODE_CREATE | MPI_MODE_RDWR, MPI_INFO_NULL, &fh);
for (i = 0; i < 4; i++)
newbuf[i] = 55;
MPI_File_write(fh, newbuf, 4, MPI_INT, MPI_STATUS_IGNORE);
MPI_File_close(&fh);
/* write 2 ints into file view with resized type */
buf[0] = 10;
buf[1] = 20;
MPI_File_open(MPI_COMM_WORLD, filename, MPI_MODE_CREATE | MPI_MODE_RDWR, MPI_INFO_NULL, &fh);
mpi_errno = MPI_File_set_view(fh, 0, MPI_INT, newtype, (char *) "native", MPI_INFO_NULL);
if (mpi_errno != MPI_SUCCESS)
errs++;
MPI_File_write(fh, buf, 2, MPI_INT, MPI_STATUS_IGNORE);
MPI_File_close(&fh);
/* read back file view with resized type and verify */
MPI_File_open(MPI_COMM_WORLD, filename, MPI_MODE_RDONLY, MPI_INFO_NULL, &fh);
mpi_errno = MPI_File_set_view(fh, 0, MPI_INT, newtype, (char *) "native", MPI_INFO_NULL);
if (mpi_errno != MPI_SUCCESS)
errs++;
for (i = 0; i < 4; i++)
newbuf[i] = 100;
MPI_File_read(fh, newbuf, 2, MPI_INT, MPI_STATUS_IGNORE);
if ((newbuf[0] != 10) || (newbuf[1] != 20) || (newbuf[2] != 100) || (newbuf[3] != 100)) {
errs++;
fprintf(stderr,
"newbuf[0] is %d, should be 10,\n newbuf[1] is %d, should be 20\n newbuf[2] is %d, should be 100,\n newbuf[3] is %d, should be 100,\n",
newbuf[0], newbuf[1], newbuf[2], newbuf[3]);
}
MPI_File_close(&fh);
/* read file back and verify */
MPI_File_open(MPI_COMM_WORLD, filename, MPI_MODE_RDONLY, MPI_INFO_NULL, &fh);
MPI_File_get_size(fh, &size);
if (size != 4 * sizeof(int)) {
errs++;
fprintf(stderr, "file size is %lld, should be %d\n", (long long) size,
(int) (4 * sizeof(int)));
}
for (i = 0; i < 4; i++)
newbuf[i] = 100;
MPI_File_read(fh, newbuf, 4, MPI_INT, MPI_STATUS_IGNORE);
if ((newbuf[0] != 10) || (newbuf[3] != 20) || (newbuf[1] != 55) || (newbuf[2] != 55)) {
errs++;
fprintf(stderr,
"newbuf[0] is %d, should be 10,\n newbuf[1] is %d, should be 55,\n newbuf[2] is %d, should be 55,\n newbuf[3] is %d, should be 20\n",
newbuf[0], newbuf[1], newbuf[2], newbuf[3]);
}
MPI_File_close(&fh);
MPI_Type_free(&newtype);
free(filename);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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