root/ompi/mca/io/romio321/romio/mpi-io/get_group.c

DEFINITIONS

1. MPI_File_get_group

   1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
   2 /* 
   3  *
   4  *   Copyright (C) 1997 University of Chicago. 
   5  *   See COPYRIGHT notice in top-level directory.
   6  */
   7 
   8 #include "mpioimpl.h"
   9 
  10 #ifdef HAVE_WEAK_SYMBOLS
  11 
  12 #if defined(HAVE_PRAGMA_WEAK)
  13 #pragma weak MPI_File_get_group = PMPI_File_get_group
  14 #elif defined(HAVE_PRAGMA_HP_SEC_DEF)
  15 #pragma _HP_SECONDARY_DEF PMPI_File_get_group MPI_File_get_group
  16 #elif defined(HAVE_PRAGMA_CRI_DUP)
  17 #pragma _CRI duplicate MPI_File_get_group as PMPI_File_get_group
  18 /* end of weak pragmas */
  19 #elif defined(HAVE_WEAK_ATTRIBUTE)
  20 int MPI_File_get_group(MPI_File fh, MPI_Group *group) __attribute__((weak,alias("PMPI_File_get_group")));
  21 #endif
  22 
  23 /* Include mapping from MPI->PMPI */
  24 #define MPIO_BUILD_PROFILING
  25 #include "mpioprof.h"
  26 #endif
  27 
  28 /*@
  29     MPI_File_get_group - Returns the group of processes that 
  30                          opened the file
  31 
  32 Input Parameters:
  33 . fh - file handle (handle)
  34 
  35 Output Parameters:
  36 . group - group that opened the file (handle)
  37 
  38 .N fortran
  39 @*/
  40 int MPI_File_get_group(MPI_File fh, MPI_Group *group)
  41 {
  42     int error_code;
  43     ADIO_File adio_fh;
  44     static char myname[] = "MPI_FILE_GET_GROUP";
  45 
  46     ROMIO_THREAD_CS_ENTER();
  47 
  48     adio_fh = MPIO_File_resolve(fh);
  49 
  50     /* --BEGIN ERROR HANDLING-- */
  51     MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);
  52     /* --END ERROR HANDLING-- */
  53 
  54 
  55     /* note: this will return the group of processes that called open, but
  56      * with deferred open this might not be the group of processes that
  57      * actually opened the file from the file system's perspective
  58      */
  59     error_code = MPI_Comm_group(adio_fh->comm, group);
  60 
  61 fn_exit:
  62     ROMIO_THREAD_CS_EXIT();
  63     return error_code;
  64 }