1 /*
2 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
3 * University Research and Technology
4 * Corporation. All rights reserved.
5 * Copyright (c) 2004-2005 The University of Tennessee and The University
6 * of Tennessee Research Foundation. All rights
7 * reserved.
8 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
9 * University of Stuttgart. All rights reserved.
10 * Copyright (c) 2004-2005 The Regents of the University of California.
11 * All rights reserved.
12 * Copyright (c) 2013 FUJITSU LIMITED. All rights reserved.
13 * Copyright (c) 2015 Research Organization for Information Science
14 * and Technology (RIST). All rights reserved.
15 * $COPYRIGHT$
16 *
17 * Additional copyrights may follow
18 *
19 * $HEADER$
20 */
21
22 #include "ompi_config.h"
23
24 #include "ompi/constants.h"
25 #include "ompi/datatype/ompi_datatype.h"
26 #include "coll_self.h"
27
28
29 /*
30 * alltoallv_intra
31 *
32 * Function: - MPI_Alltoallv
33 * Accepts: - same as MPI_Alltoallv()
34 * Returns: - MPI_SUCCESS or an MPI error code
35 */
36 int
37 mca_coll_self_alltoallv_intra(const void *sbuf, const int *scounts, const int *sdisps,
38 struct ompi_datatype_t *sdtype,
39 void *rbuf, const int *rcounts, const int *rdisps,
40 struct ompi_datatype_t *rdtype,
41 struct ompi_communicator_t *comm,
42 mca_coll_base_module_t *module)
43 {
44 int err;
45 ptrdiff_t lb, rextent, sextent;
46
47 if (MPI_IN_PLACE == sbuf) {
48 return MPI_SUCCESS;
49 }
50
51 err = ompi_datatype_get_extent(sdtype, &lb, &sextent);
52 if (OMPI_SUCCESS != err) {
53 return OMPI_ERROR;
54 }
55 err = ompi_datatype_get_extent(rdtype, &lb, &rextent);
56 if (OMPI_SUCCESS != err) {
57 return OMPI_ERROR;
58 }
59 return ompi_datatype_sndrcv(((char *) sbuf) + sdisps[0] * sextent,
60 scounts[0], sdtype,
61 ((char *) rbuf) + rdisps[0] * rextent,
62 rcounts[0], rdtype);
63 }