/* Single-image implementation of GNU Fortran Coarray Library
   Copyright (C) 2011
   Free Software Foundation, Inc.
   Contributed by Tobias Burnus <burnus@net-b.de>

This file is part of the GNU Fortran Coarray Runtime Library (libcaf).

Libcaf is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

Libcaf is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

#include "libcaf.h"
#include <stdio.h>  /* For fputs and fprintf.  */
#include <stdlib.h> /* For exit.  */

/* Define GFC_CAF_CHECK to enable run-time checking.  */
/* #define GFC_CAF_CHECK  1  */


/* Single-image implementation of the CAF library.
   Note: For performance reasons -fcoarry=single should be used
   rather than this library.  */

void
_gfortran_caf_init (int *argc __attribute__ ((unused)),
		    char ***argv __attribute__ ((unused)),
		    int *this_image, int *num_images)
{
  *this_image = 1;
  *num_images = 1;
}

void
_gfortran_caf_finalize (void)
{
}

int
_gfortran_caf_sync_all (char *errmsg __attribute__ ((unused)),
			int errmsg_len __attribute__ ((unused)))
{
  return 0;
}

int
_gfortran_caf_sync_images (int count __attribute__ ((unused)),
			   int images[] __attribute__ ((unused)),
			   char *errmsg __attribute__ ((unused)),
			   int errmsg_len __attribute__ ((unused)))
{
#ifdef GFC_CAF_CHECK
  int i;

  for (i = 0; i < count; i++)
    if (images[i] != 1)
      {
	fprintf (stderr, "COARRAY ERROR: Invalid image index %d to SYNC "
		 "IMAGES", images[i]);
	exit (1);
      }
#endif

  return 0;
}

void
_gfortran_caf_critical (void)
{
}

void
_gfortran_caf_end_critical (void)
{
}

void
_gfortran_caf_error_stop_str (const char *string, int32_t len)
{
  fputs ("ERROR STOP ", stderr);
  while (len--)
    fputc (*(string++), stderr);
  fputs ("\n", stderr);

  exit (1);
}

void
_gfortran_caf_error_stop (int32_t error)
{
  fprintf (stderr, "ERROR STOP %d\n", error);
  exit (error);
}
