1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
2 /*
3 * Copyright (C) 1997 University of Chicago.
4 * See COPYRIGHT notice in top-level directory.
5 */
6
7 #include "mpioimpl.h"
8
9 #ifdef HAVE_WEAK_SYMBOLS
10
11 #if defined(HAVE_PRAGMA_WEAK)
12 #pragma weak MPI_File_read_at = PMPI_File_read_at
13 #elif defined(HAVE_PRAGMA_HP_SEC_DEF)
14 #pragma _HP_SECONDARY_DEF PMPI_File_read_at MPI_File_read_at
15 #elif defined(HAVE_PRAGMA_CRI_DUP)
16 #pragma _CRI duplicate MPI_File_read_at as PMPI_File_read_at
17 /* end of weak pragmas */
18 #elif defined(HAVE_WEAK_ATTRIBUTE)
19 int MPI_File_read_at(MPI_File fh, MPI_Offset offset, void *buf, int count, MPI_Datatype datatype,
20 MPI_Status *status) __attribute__((weak,alias("PMPI_File_read_at")));
21 #endif
22
23 /* Include mapping from MPI->PMPI */
24 #define MPIO_BUILD_PROFILING
25 #include "mpioprof.h"
26 #endif
27
28 /* status object not filled currently */
29
30 /*@
31 MPI_File_read_at - Read using explicit offset
32
33 Input Parameters:
34 . fh - file handle (handle)
35 . offset - file offset (nonnegative integer)
36 . count - number of elements in buffer (nonnegative integer)
37 . datatype - datatype of each buffer element (handle)
38
39 Output Parameters:
40 . buf - initial address of buffer (choice)
41 . status - status object (Status)
42
43 .N fortran
44 @*/
MPI_File_read_at(MPI_File fh,MPI_Offset offset,void * buf,int count,MPI_Datatype datatype,MPI_Status * status)45 int MPI_File_read_at(MPI_File fh, MPI_Offset offset, void *buf,
46 int count, MPI_Datatype datatype, MPI_Status *status)
47 {
48 int error_code;
49 static char myname[] = "MPI_FILE_READ_AT";
50 #ifdef MPI_hpux
51 int fl_xmpi;
52
53 HPMP_IO_START(fl_xmpi, BLKMPIFILEREADAT, TRDTBLOCK, fh, datatype,
54 count);
55 #endif /* MPI_hpux */
56
57 /* ADIOI_File_read() defined in mpi-io/read.c */
58 error_code = MPIOI_File_read(fh, offset, ADIO_EXPLICIT_OFFSET, buf,
59 count, datatype, myname, status);
60
61 #ifdef MPI_hpux
62 HPMP_IO_END(fl_xmpi, fh, datatype, count);
63 #endif /* MPI_hpux */
64
65 return error_code;
66 }
67