root/ompi/mpi/c/file_read_ordered.c

DEFINITIONS

1. MPI_File_read_ordered

   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) 2004-2005 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) 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/file/file.h"
  28 #include "ompi/datatype/ompi_datatype.h"
  29 
  30 #if OMPI_BUILD_MPI_PROFILING
  31 #if OPAL_HAVE_WEAK_SYMBOLS
  32 #pragma weak MPI_File_read_ordered = PMPI_File_read_ordered
  33 #endif
  34 #define MPI_File_read_ordered PMPI_File_read_ordered
  35 #endif
  36 
  37 static const char FUNC_NAME[] = "MPI_File_read_ordered";
  38 
  39 
  40 int MPI_File_read_ordered(MPI_File fh, void *buf, int count,
  41                           MPI_Datatype datatype, MPI_Status *status)
  42 {
  43     int rc;
  44 
  45     if (MPI_PARAM_CHECK) {
  46         rc = MPI_SUCCESS;
  47         OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
  48         if (ompi_file_invalid(fh)) {
  49             fh = MPI_FILE_NULL;
  50             rc = MPI_ERR_FILE;
  51         } else if (count < 0) {
  52             rc = MPI_ERR_COUNT;
  53         } else {
  54            OMPI_CHECK_DATATYPE_FOR_RECV(rc, datatype, count);
  55         }
  56         OMPI_ERRHANDLER_CHECK(rc, fh, rc, FUNC_NAME);
  57     }
  58 
  59     OPAL_CR_ENTER_LIBRARY();
  60 
  61     /* Call the back-end io component function */
  62 
  63     switch (fh->f_io_version) {
  64     case MCA_IO_BASE_V_2_0_0:
  65         rc = fh->f_io_selected_module.v2_0_0.
  66             io_module_file_read_ordered(fh, buf, count, datatype, status);
  67         break;
  68 
  69     default:
  70         rc = MPI_ERR_INTERN;
  71         break;
  72     }
  73 
  74     /* All done */
  75 
  76     OMPI_ERRHANDLER_RETURN(rc, fh, rc, FUNC_NAME);
  77 }