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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* Copyright (C) 1997 University of Chicago.
* See COPYRIGHT notice in top-level directory.
*/
#include "ad_pfs.h"
#include "adio_extern.h"
void ADIOI_PFS_Fcntl(ADIO_File fd, int flag, ADIO_Fcntl_t *fcntl_struct,
int *error_code)
{
int i, err;
int iomod, np_total, np_comm;
static char myname[] = "ADIOI_PFS_FCNTL";
switch(flag) {
case ADIO_FCNTL_GET_FSIZE:
if (!(fd->atomicity)) {
/* in M_ASYNC mode, all processes are not aware of changes
in file size (although the manual says otherwise). Therefore,
temporarily change to M_UNIX and then change
back to M_ASYNC.*/
MPI_Comm_size(MPI_COMM_WORLD, &np_total);
MPI_Comm_size(fd->comm, &np_comm);
if (np_total == np_comm) {
err = _setiomode(fd->fd_sys, M_UNIX);
err = _setiomode(fd->fd_sys, M_ASYNC);
}
/* else it is M_UNIX anyway, so no problem */
}
fcntl_struct->fsize = lseek(fd->fd_sys, 0, SEEK_END);
if (fd->fp_sys_posn != -1)
lseek(fd->fd_sys, fd->fp_sys_posn, SEEK_SET);
*error_code = MPI_SUCCESS;
break;
case ADIO_FCNTL_SET_DISKSPACE:
err = _lsize(fd->fd_sys, fcntl_struct->diskspace, SEEK_SET);
if (err == -1) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE, myname,
__LINE__, MPI_ERR_IO, "**io",
"**io %s", strerror(errno));
}
else *error_code = MPI_SUCCESS;
break;
case ADIO_FCNTL_SET_ATOMICITY:
MPI_Comm_size(MPI_COMM_WORLD, &np_total);
MPI_Comm_size(fd->comm, &np_comm);
if (np_total == np_comm) {
iomod = (fcntl_struct->atomicity == 0) ? M_ASYNC : M_UNIX;
err = _setiomode(fd->fd_sys, iomod);
}
/* else can't do anything because setiomode is global. but
the file will have been opened with M_UNIX anyway, because
gopen is also global. */
fd->atomicity = (fcntl_struct->atomicity == 0) ? 0 : 1;
if (err == -1) {
/* --BEGIN ERROR HANDLING-- */
*error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE, myname,
__LINE__, MPI_ERR_IO, "**io",
"**io %s", strerror(errno));
/* --END ERROR HANDLING-- */
}
else *error_code = MPI_SUCCESS;
break;
default:
/* --BEGIN ERROR HANDLING-- */
*error_code = MPIO_Err_create_code(MPI_SUCCESS, MPI_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_ARG,
"**flag", "**flag %d", flag);
return;
/* --END ERROR HANDLING-- */
}
}
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