root/ompi/mpi/c/file_write_at.c

DEFINITIONS

1. MPI_File_write_at

   1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
   2 /*
   3  * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
   4  *                         University Research and Technology
   5  *                         Corporation.  All rights reserved.
   6  * Copyright (c) 2004-2005 The University of Tennessee and The University
   7  *                         of Tennessee Research Foundation.  All rights
   8  *                         reserved.
   9  * Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
  10  *                         University of Stuttgart.  All rights reserved.
  11  * Copyright (c) 2004-2005 The Regents of the University of California.
  12  *                         All rights reserved.
  13  * Copyright (c) 2008      Sun Microsystems, Inc.  All rights reserved.
  14  * Copyright (c) 2013      Los Alamos National Security, LLC.  All rights
  15  *                         reserved.
  16  * Copyright (c) 2015      Research Organization for Information Science
  17  *                         and Technology (RIST). All rights reserved.
  18  * $COPYRIGHT$
  19  *
  20  * Additional copyrights may follow
  21  *
  22  * $HEADER$
  23  */
  24 
  25 #include "ompi_config.h"
  26 
  27 #include "ompi/mpi/c/bindings.h"
  28 #include "ompi/runtime/params.h"
  29 #include "ompi/errhandler/errhandler.h"
  30 #include "ompi/file/file.h"
  31 #include "ompi/datatype/ompi_datatype.h"
  32 #include "ompi/memchecker.h"
  33 
  34 #if OMPI_BUILD_MPI_PROFILING
  35 #if OPAL_HAVE_WEAK_SYMBOLS
  36 #pragma weak MPI_File_write_at = PMPI_File_write_at
  37 #endif
  38 #define MPI_File_write_at PMPI_File_write_at
  39 #endif
  40 
  41 static const char FUNC_NAME[] = "MPI_File_write_at";
  42 
  43 
  44 int MPI_File_write_at(MPI_File fh, MPI_Offset offset, const void *buf,
  45                       int count, MPI_Datatype datatype,
  46                       MPI_Status *status)
  47 {
  48     int rc;
  49 
  50     MEMCHECKER(
  51         memchecker_datatype(datatype);
  52         memchecker_call(&opal_memchecker_base_isdefined, buf, count, datatype);
  53     );
  54 
  55     if (MPI_PARAM_CHECK) {
  56         rc = MPI_SUCCESS;
  57         OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
  58         if (ompi_file_invalid(fh)) {
  59             fh = MPI_FILE_NULL;
  60             rc = MPI_ERR_FILE;
  61         } else if (count < 0) {
  62             rc = MPI_ERR_COUNT;
  63         } else {
  64            OMPI_CHECK_DATATYPE_FOR_SEND(rc, datatype, count);
  65         }
  66         OMPI_ERRHANDLER_CHECK(rc, fh, rc, FUNC_NAME);
  67     }
  68 
  69     OPAL_CR_ENTER_LIBRARY();
  70 
  71     /* Call the back-end io component function */
  72 
  73     switch (fh->f_io_version) {
  74     case MCA_IO_BASE_V_2_0_0:
  75         rc = fh->f_io_selected_module.v2_0_0.
  76           io_module_file_write_at(fh, offset, buf, count, datatype, status);
  77         break;
  78 
  79     default:
  80         rc = MPI_ERR_INTERN;
  81         break;
  82     }
  83 
  84     /* All done */
  85 
  86     OMPI_ERRHANDLER_RETURN(rc, fh, rc, FUNC_NAME);
  87 }