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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_sfs.h"
#include "adio_extern.h"
void ADIOI_SFS_Fcntl(ADIO_File fd, int flag, ADIO_Fcntl_t *fcntl_struct, int *error_code)
{
int i, ntimes, len;
ADIO_Offset curr_fsize, alloc_size, size, done;
ADIO_Status status;
char *buf;
#ifndef PRINT_ERR_MSG
static char myname[] = "ADIOI_SFS_FCNTL";
#endif
switch(flag) {
case ADIO_FCNTL_GET_FSIZE:
/* On SFS, I find that a write from one process, which changes
the file size, does not automatically make the new file size
visible to other processes. Therefore, a sync-barrier-sync is
needed. (Other processes are able to read the data written
though; only file size is returned incorrectly.) */
fsync(fd->fd_sys);
MPI_Barrier(fd->comm);
fsync(fd->fd_sys);
fcntl_struct->fsize = llseek(fd->fd_sys, 0, SEEK_END);
if (fd->fp_sys_posn != -1)
llseek(fd->fd_sys, fd->fp_sys_posn, SEEK_SET);
if (fcntl_struct->fsize == -1) {
#ifdef MPICH
*error_code = MPIR_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE, myname, __LINE__, MPI_ERR_IO, "**io",
"**io %s", strerror(errno));
#elif defined(PRINT_ERR_MSG)
*error_code = MPI_ERR_UNKNOWN;
#else /* MPICH-1 */
*error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ADIO_ERROR,
myname, "I/O Error", "%s", strerror(errno));
ADIOI_Error(fd, *error_code, myname);
#endif
}
else *error_code = MPI_SUCCESS;
break;
case ADIO_FCNTL_SET_DISKSPACE:
ADIOI_GEN_Prealloc(fd, fcntl_struct->diskspace, error_code);
break;
case ADIO_FCNTL_SET_ATOMICITY:
fd->atomicity = (fcntl_struct->atomicity == 0) ? 0 : 1;
*error_code = MPI_SUCCESS;
break;
default:
FPRINTF(stderr, "Unknown flag passed to ADIOI_SFS_Fcntl\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
}
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