libgfortran/caf/single.c

   1 /* Single-image implementation of GNU Fortran Coarray Library
   2    Copyright (C) 2011
   3    Free Software Foundation, Inc.
   4    Contributed by Tobias Burnus <burnus@net-b.de>
   5
   6 This file is part of the GNU Fortran Coarray Runtime Library (libcaf).
   7
   8 Libcaf is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 Libcaf is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 Under Section 7 of GPL version 3, you are granted additional
  19 permissions described in the GCC Runtime Library Exception, version
  20 3.1, as published by the Free Software Foundation.
  21
  22 You should have received a copy of the GNU General Public License and
  23 a copy of the GCC Runtime Library Exception along with this program;
  24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  25 <http://www.gnu.org/licenses/>.  */
  26
  27 #include "libcaf.h"
  28 #include <stdio.h>  /* For fputs and fprintf.  */
  29 #include <stdlib.h> /* For exit.  */
  30
  31 /* Define GFC_CAF_CHECK to enable run-time checking.  */
  32 /* #define GFC_CAF_CHECK  1  */
  33
  34
  35 /* Single-image implementation of the CAF library.
  36    Note: For performance reasons -fcoarry=single should be used
  37    rather than this library.  */
  38
  39 void
  40 _gfortran_caf_init (int *argc __attribute__ ((unused)),
  41                     char ***argv __attribute__ ((unused)),
  42                     int *this_image, int *num_images)
  43 {
  44   *this_image = 1;
  45   *num_images = 1;
  46 }
  47
  48 void
  49 _gfortran_caf_finalize (void)
  50 {
  51 }
  52
  53 int
  54 _gfortran_caf_sync_all (char *errmsg __attribute__ ((unused)),
  55                         int errmsg_len __attribute__ ((unused)))
  56 {
  57   return 0;
  58 }
  59
  60 int
  61 _gfortran_caf_sync_images (int count __attribute__ ((unused)),
  62                            int images[] __attribute__ ((unused)),
  63                            char *errmsg __attribute__ ((unused)),
  64                            int errmsg_len __attribute__ ((unused)))
  65 {
  66 #ifdef GFC_CAF_CHECK
  67   int i;
  68
  69   for (i = 0; i < count; i++)
  70     if (images[i] != 1)
  71       {
  72         fprintf (stderr, "COARRAY ERROR: Invalid image index %d to SYNC "
  73                  "IMAGES", images[i]);
  74         exit (1);
  75       }
  76 #endif
  77
  78   return 0;
  79 }
  80
  81 void
  82 _gfortran_caf_critical (void)
  83 {
  84 }
  85
  86 void
  87 _gfortran_caf_end_critical (void)
  88 {
  89 }
  90
  91 void
  92 _gfortran_caf_error_stop_str (const char *string, int32_t len)
  93 {
  94   fputs ("ERROR STOP ", stderr);
  95   while (len--)
  96     fputc (*(string++), stderr);
  97   fputs ("\n", stderr);
  98
  99   exit (1);
 100 }
 101
 102 void
 103 _gfortran_caf_error_stop (int32_t error)
 104 {
 105   fprintf (stderr, "ERROR STOP %d\n", error);
 106   exit (error);
 107 }