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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 "mpitestconf.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
/*
static char MTEST_Descrip[] = "Test file_set_view";
*/
/*
* access style is explicitly described as modifiable. values include
* read_once, read_mostly, write_once, write_mostlye, random
*
*
*/
int main(int argc, char *argv[])
{
int errs = 0, err;
int buf[10];
int rank;
MPI_Comm comm;
MPI_Status status;
MPI_File fh;
MPI_Info infoin, infoout;
char value[1024];
int flag, count;
MTest_Init(&argc, &argv);
comm = MPI_COMM_WORLD;
MPI_Comm_rank(comm, &rank);
MPI_Info_create(&infoin);
MPI_Info_set(infoin, (char *) "access_style", (char *) "write_once,random");
MPI_File_open(comm, (char *) "testfile", MPI_MODE_RDWR | MPI_MODE_CREATE, infoin, &fh);
buf[0] = rank;
err = MPI_File_write_ordered(fh, buf, 1, MPI_INT, &status);
if (err) {
errs++;
MTestPrintError(err);
}
MPI_Info_set(infoin, (char *) "access_style", (char *) "read_once");
err = MPI_File_seek_shared(fh, 0, MPI_SEEK_SET);
if (err) {
errs++;
MTestPrintError(err);
}
err = MPI_File_set_info(fh, infoin);
if (err) {
errs++;
MTestPrintError(err);
}
MPI_Info_free(&infoin);
buf[0] = -1;
err = MPI_File_read_ordered(fh, buf, 1, MPI_INT, &status);
if (err) {
errs++;
MTestPrintError(err);
}
MPI_Get_count(&status, MPI_INT, &count);
if (count != 1) {
errs++;
printf("Expected to read one int, read %d\n", count);
}
if (buf[0] != rank) {
errs++;
printf("Did not read expected value (%d)\n", buf[0]);
}
err = MPI_File_get_info(fh, &infoout);
if (err) {
errs++;
MTestPrintError(err);
}
MPI_Info_get(infoout, (char *) "access_style", 1024, value, &flag);
/* Note that an implementation is allowed to ignore the set_info,
* so we'll accept either the original or the updated version */
if (flag) {
if (strcmp(value, "read_once") != 0 && strcmp(value, "write_once,random") != 0) {
errs++;
printf("value for access_style unexpected; is %s\n", value);
}
}
MPI_Info_free(&infoout);
err = MPI_File_close(&fh);
if (err) {
errs++;
MTestPrintError(err);
}
MPI_Barrier(comm);
MPI_Comm_rank(comm, &rank);
if (rank == 0) {
err = MPI_File_delete((char *) "testfile", MPI_INFO_NULL);
if (err) {
errs++;
MTestPrintError(err);
}
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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