root/ompi/mpi/c/file_open.c

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DEFINITIONS

This source file includes following definitions.
  1. MPI_File_open

   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) 2013      Cisco Systems, 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 (c) 2016      University of Houston. All rights reserved.
  19  * Copyright (c) 2017      IBM Corporation. All rights reserved.
  20  * $COPYRIGHT$
  21  *
  22  * Additional copyrights may follow
  23  *
  24  * $HEADER$
  25  */
  26 
  27 #include "ompi_config.h"
  28 
  29 #include "ompi/mpi/c/bindings.h"
  30 #include "ompi/runtime/params.h"
  31 #include "ompi/communicator/communicator.h"
  32 #include "ompi/errhandler/errhandler.h"
  33 #include "ompi/info/info.h"
  34 #include "ompi/file/file.h"
  35 #include "ompi/mca/io/io.h"
  36 #include "ompi/mca/io/base/base.h"
  37 #include "ompi/memchecker.h"
  38 
  39 
  40 extern opal_mutex_t ompi_mpi_file_bootstrap_mutex;
  41 
  42 #if OMPI_BUILD_MPI_PROFILING
  43 #if OPAL_HAVE_WEAK_SYMBOLS
  44 #pragma weak MPI_File_open = PMPI_File_open
  45 #endif
  46 #define MPI_File_open PMPI_File_open
  47 #endif
  48 
  49 static const char FUNC_NAME[] = "MPI_File_open";
  50 
  51 
  52 int MPI_File_open(MPI_Comm comm, const char *filename, int amode,
  53                   MPI_Info info, MPI_File *fh)
  54 {
  55     int rc;
  56 
  57     MEMCHECKER(
  58         memchecker_comm(comm);
  59     );
  60 
  61     if (MPI_PARAM_CHECK) {
  62         OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
  63         if (NULL == info || ompi_info_is_freed(info)) {
  64             return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_INFO,
  65                                           FUNC_NAME);
  66         } else if (ompi_comm_invalid(comm)) {
  67             return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
  68                                           FUNC_NAME);
  69         }
  70         if (OMPI_COMM_IS_INTER(comm)) {
  71             return OMPI_ERRHANDLER_INVOKE (comm, MPI_ERR_COMM,
  72                                           FUNC_NAME);
  73         }
  74 
  75     }
  76 
  77     /* Note that MPI-2:9.7 (p265 in the ps; p261 in the pdf) says that
  78        errors in MPI_FILE_OPEN (before the file handle is created)
  79        should invoke the default error handler on MPI_FILE_NULL.
  80        Hence, if we get a file handle out of ompi_file_open(), invoke
  81        the error handler on that.  If not, invoke the error handler on
  82        MPI_FILE_NULL. */
  83 
  84     /* The io framework is only initialized lazily.  If it hasn't
  85        already been initialized, do so now (note that MPI_FILE_OPEN
  86        and MPI_FILE_DELETE are the only two places that it will be
  87        initialized). */
  88 
  89     /* For multi-threaded scenarios, initializing the file i/o
  90        framework and mca infrastructure needs to be protected
  91        by a mutex, similarly to the other frameworks in
  92        ompi/runtime/ompi_mpi_init.c
  93     */
  94 
  95     opal_mutex_lock(&ompi_mpi_file_bootstrap_mutex);
  96 
  97     rc = mca_base_framework_open(&ompi_io_base_framework, 0);
  98     if (OMPI_SUCCESS != rc) {
  99         opal_mutex_unlock(&ompi_mpi_file_bootstrap_mutex);
 100         return OMPI_ERRHANDLER_INVOKE(MPI_FILE_NULL, rc, FUNC_NAME);
 101     }
 102     opal_mutex_unlock(&ompi_mpi_file_bootstrap_mutex);
 103 
 104     OPAL_CR_ENTER_LIBRARY();
 105 
 106     /* Create an empty MPI_File handle */
 107 
 108     *fh = MPI_FILE_NULL;
 109     rc = ompi_file_open(comm, filename, amode, &(info->super), fh);
 110 
 111     /* Creating the file handle also selects a component to use,
 112        creates a module, and calls file_open() on the module.  So
 113        we're good to go. */
 114     OMPI_ERRHANDLER_RETURN(rc, *fh, rc, FUNC_NAME);
 115 }

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