183 lines
4.2 KiB
C
183 lines
4.2 KiB
C
/* Single-image implementation of GNU Fortran Coarray Library
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Copyright (C) 2011
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Free Software Foundation, Inc.
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Contributed by Tobias Burnus <burnus@net-b.de>
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This file is part of the GNU Fortran Coarray Runtime Library (libcaf).
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Libcaf is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libcaf is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libcaf.h"
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#include <stdio.h> /* For fputs and fprintf. */
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#include <stdlib.h> /* For exit and malloc. */
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#include <string.h> /* For memcpy and memset. */
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#include <stdarg.h> /* For variadic arguments. */
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/* Define GFC_CAF_CHECK to enable run-time checking. */
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/* #define GFC_CAF_CHECK 1 */
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/* Single-image implementation of the CAF library.
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Note: For performance reasons -fcoarry=single should be used
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rather than this library. */
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/* Global variables. */
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caf_static_t *caf_static_list = NULL;
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/* Keep in sync with mpi.c. */
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static void
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caf_runtime_error (const char *message, ...)
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{
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va_list ap;
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fprintf (stderr, "Fortran runtime error: ");
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va_start (ap, message);
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fprintf (stderr, message, ap);
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va_end (ap);
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fprintf (stderr, "\n");
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/* FIXME: Shutdown the Fortran RTL to flush the buffer. PR 43849. */
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exit (EXIT_FAILURE);
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}
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void
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_gfortran_caf_init (int *argc __attribute__ ((unused)),
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char ***argv __attribute__ ((unused)),
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int *this_image, int *num_images)
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{
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*this_image = 1;
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*num_images = 1;
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}
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void
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_gfortran_caf_finalize (void)
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{
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while (caf_static_list != NULL)
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{
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free(caf_static_list->token[0]);
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caf_static_list = caf_static_list->prev;
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}
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}
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void *
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_gfortran_caf_register (ptrdiff_t size, caf_register_t type, void **token,
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int *stat, char *errmsg, int errmsg_len)
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{
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void *local;
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local = malloc (size);
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token = malloc (sizeof (void*) * 1);
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token[0] = local;
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if (unlikely (local == NULL || token == NULL))
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{
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const char msg[] = "Failed to allocate coarray";
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if (stat)
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{
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*stat = 1;
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if (errmsg_len > 0)
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{
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int len = ((int) sizeof (msg) > errmsg_len) ? errmsg_len
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: (int) sizeof (msg);
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memcpy (errmsg, msg, len);
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if (errmsg_len > len)
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memset (&errmsg[len], ' ', errmsg_len-len);
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}
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return NULL;
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}
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else
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caf_runtime_error (msg);
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}
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if (stat)
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*stat = 0;
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if (type == CAF_REGTYPE_COARRAY_STATIC)
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{
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caf_static_t *tmp = malloc (sizeof (caf_static_t));
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tmp->prev = caf_static_list;
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tmp->token = token;
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caf_static_list = tmp;
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}
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return local;
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}
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int
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_gfortran_caf_deregister (void **token __attribute__ ((unused)))
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{
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return 0;
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}
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void
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_gfortran_caf_sync_all (int *stat,
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char *errmsg __attribute__ ((unused)),
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int errmsg_len __attribute__ ((unused)))
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{
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if (stat)
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*stat = 0;
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}
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void
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_gfortran_caf_sync_images (int count __attribute__ ((unused)),
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int images[] __attribute__ ((unused)),
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int *stat,
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char *errmsg __attribute__ ((unused)),
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int errmsg_len __attribute__ ((unused)))
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{
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#ifdef GFC_CAF_CHECK
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int i;
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for (i = 0; i < count; i++)
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if (images[i] != 1)
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{
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fprintf (stderr, "COARRAY ERROR: Invalid image index %d to SYNC "
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"IMAGES", images[i]);
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exit (EXIT_FAILURE);
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}
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#endif
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if (stat)
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*stat = 0;
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}
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void
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_gfortran_caf_error_stop_str (const char *string, int32_t len)
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{
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fputs ("ERROR STOP ", stderr);
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while (len--)
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fputc (*(string++), stderr);
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fputs ("\n", stderr);
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exit (1);
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}
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void
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_gfortran_caf_error_stop (int32_t error)
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{
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fprintf (stderr, "ERROR STOP %d\n", error);
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exit (error);
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}
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