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/* Single-image implementation of GNU Fortran Coarray Library
Copyright (C) 2011-2014 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 and malloc. */
#include <string.h> /* For memcpy and memset. */
#include <stdarg.h> /* For variadic arguments. */
/* 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. */
/* Global variables. */
caf_static_t *caf_static_list = NULL;
/* Keep in sync with mpi.c. */
static void
caf_runtime_error (const char *message, ...)
{
va_list ap;
fprintf (stderr, "Fortran runtime error: ");
va_start (ap, message);
vfprintf (stderr, message, ap);
va_end (ap);
fprintf (stderr, "\n");
/* FIXME: Shutdown the Fortran RTL to flush the buffer. PR 43849. */
exit (EXIT_FAILURE);
}
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)
{
while (caf_static_list != NULL)
{
caf_static_t *tmp = caf_static_list->prev;
free (caf_static_list->token[0]);
free (caf_static_list->token);
free (caf_static_list);
caf_static_list = tmp;
}
}
void *
_gfortran_caf_register (ptrdiff_t size, caf_register_t type, void ***token,
int *stat, char *errmsg, int errmsg_len)
{
void *local;
local = malloc (size);
*token = malloc (sizeof (void*) * 1);
(*token)[0] = local;
if (unlikely (local == NULL || token == NULL))
{
const char msg[] = "Failed to allocate coarray";
if (stat)
{
*stat = 1;
if (errmsg_len > 0)
{
int len = ((int) sizeof (msg) > errmsg_len) ? errmsg_len
: (int) sizeof (msg);
memcpy (errmsg, msg, len);
if (errmsg_len > len)
memset (&errmsg[len], ' ', errmsg_len-len);
}
return NULL;
}
else
caf_runtime_error (msg);
}
if (stat)
*stat = 0;
if (type == CAF_REGTYPE_COARRAY_STATIC)
{
caf_static_t *tmp = malloc (sizeof (caf_static_t));
tmp->prev = caf_static_list;
tmp->token = *token;
caf_static_list = tmp;
}
return local;
}
void
_gfortran_caf_deregister (void ***token, int *stat,
char *errmsg __attribute__ ((unused)),
int errmsg_len __attribute__ ((unused)))
{
free ((*token)[0]);
free (*token);
if (stat)
*stat = 0;
}
void
_gfortran_caf_sync_all (int *stat,
char *errmsg __attribute__ ((unused)),
int errmsg_len __attribute__ ((unused)))
{
if (stat)
*stat = 0;
}
void
_gfortran_caf_sync_images (int count __attribute__ ((unused)),
int images[] __attribute__ ((unused)),
int *stat,
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 (EXIT_FAILURE);
}
#endif
if (stat)
*stat = 0;
}
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);
}
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