1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
2 /*
3 *
4 * Copyright (C) 1997 University of Chicago.
5 * See COPYRIGHT notice in top-level directory.
6 */
7
8 #include "ad_zoidfs.h"
9 #include "ad_zoidfs_common.h"
10
11 /* as with flush, implement the resize operation in a scalable
12 * manner. one process does the work, then broadcasts the result to everyone
13 * else. fortunately, this operation is defined to be collective */
14 void ADIOI_ZOIDFS_Resize(ADIO_File fd, ADIO_Offset size, int *error_code)
15 {
16 int ret, rank;
17 ADIOI_ZOIDFS_object *zoidfs_obj_ptr;
18 static char myname[] = "ADIOI_ZOIDFS_RESIZE";
19
20 *error_code = MPI_SUCCESS;
21
22 zoidfs_obj_ptr = (ADIOI_ZOIDFS_object *)fd->fs_ptr;
23
24 MPI_Comm_rank(fd->comm, &rank);
25
26
27 /* MPI-IO semantics treat conflicting MPI_File_set_size requests the
28 * same as conflicting write requests. Thus, a resize from one
29 * process does not have to be visible to the other processes until a
30 * syncronization point is reached */
31
32 if (rank == fd->hints->ranklist[0]) {
33 NO_STALE(ret, fd, zoidfs_obj_ptr,
34 zoidfs_resize(zoidfs_obj_ptr, size, ZOIDFS_NO_OP_HINT));
35 MPI_Bcast(&ret, 1, MPI_INT, fd->hints->ranklist[0], fd->comm);
36 } else {
37 MPI_Bcast(&ret, 1, MPI_INT, fd->hints->ranklist[0], fd->comm);
38 }
39 /* --BEGIN ERROR HANDLING-- */
40 if (ret != ZFS_OK) {
41 *error_code = MPIO_Err_create_code(MPI_SUCCESS,
42 MPIR_ERR_RECOVERABLE,
43 myname, __LINE__,
44 ADIOI_ZOIDFS_error_convert(ret),
45 "Error in zoidfs_resize", 0);
46 return;
47 }
48 /* --END ERROR HANDLING-- */
49 }
50
51 /*
52 * vim: ts=8 sts=4 sw=4 noexpandtab
53 */