root/ompi/mpi/c/file_iread_at.c

DEFINITIONS

1. MPI_File_iread_at

   1 /*
   2  * Copyright (c) 2004-2007 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) 2004-2008 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) 2008      Sun Microsystems, Inc.  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/mpi/c/bindings.h"
  25 #include "ompi/runtime/params.h"
  26 #include "ompi/errhandler/errhandler.h"
  27 #include "ompi/datatype/ompi_datatype.h"
  28 #include "ompi/file/file.h"
  29 #include "ompi/mca/io/io.h"
  30 #include "ompi/mca/io/base/io_base_request.h"
  31 #include "ompi/memchecker.h"
  32 
  33 #if OMPI_BUILD_MPI_PROFILING
  34 #if OPAL_HAVE_WEAK_SYMBOLS
  35 #pragma weak MPI_File_iread_at = PMPI_File_iread_at
  36 #endif
  37 #define MPI_File_iread_at PMPI_File_iread_at
  38 #endif
  39 
  40 static const char FUNC_NAME[] = "MPI_File_iread_at";
  41 
  42 
  43 int MPI_File_iread_at(MPI_File fh, MPI_Offset offset, void *buf,
  44                       int count, MPI_Datatype datatype, MPI_Request *request)
  45 {
  46     int rc;
  47 
  48     MEMCHECKER(
  49         memchecker_datatype(datatype);
  50     );
  51 
  52     if (MPI_PARAM_CHECK) {
  53         rc = MPI_SUCCESS;
  54         OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
  55         if (ompi_file_invalid(fh)) {
  56             fh = MPI_FILE_NULL;
  57             rc = MPI_ERR_FILE;
  58         } else if (count < 0) {
  59             rc = MPI_ERR_COUNT;
  60         } else if (NULL == request) {
  61             rc = MPI_ERR_REQUEST;
  62         } else {
  63            OMPI_CHECK_DATATYPE_FOR_RECV(rc, datatype, count);
  64         }
  65         OMPI_ERRHANDLER_CHECK(rc, fh, rc, FUNC_NAME);
  66     }
  67 
  68     OPAL_CR_ENTER_LIBRARY();
  69 
  70     /* Call the back-end io component function */
  71     switch (fh->f_io_version) {
  72     case MCA_IO_BASE_V_2_0_0:
  73         rc = fh->f_io_selected_module.v2_0_0.
  74             io_module_file_iread_at(fh, offset, buf, count, datatype,
  75                                     request);
  76         break;
  77 
  78     default:
  79         rc = MPI_ERR_INTERN;
  80         break;
  81     }
  82 
  83     /* All done */
  84 
  85     OMPI_ERRHANDLER_RETURN(rc, fh, rc, FUNC_NAME);
  86 }