--- /dev/null
+/* Copyright (C) 2013 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <libguile.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define SMOBS_COUNT (10000)
+
+struct x_tag
+{
+ SCM scm_value;
+ int c_value;
+};
+
+typedef struct x_tag x_t;
+
+unsigned int mark_call_count = 0;
+
+static scm_t_bits x_tag;
+static SCM make_x (void);
+static SCM mark_x (SCM x);
+static int print_x (SCM x, SCM port, scm_print_state * pstate);
+static size_t free_x (SCM x);
+static void init_smob_type (void);
+static void test_scm_smob_mark (void);
+
+static SCM
+make_x ()
+{
+ static int i = 0;
+ SCM s_x;
+ x_t *c_x;
+
+ i++;
+ c_x = (x_t *) scm_gc_malloc (sizeof (x_t), "x");
+ c_x->scm_value = scm_from_int (i);
+ c_x->c_value = i;
+ SCM_NEWSMOB (s_x, x_tag, c_x);
+ return s_x;
+}
+
+static SCM
+mark_x (SCM x)
+{
+ x_t *c_x;
+ c_x = (x_t *) SCM_SMOB_DATA (x);
+ scm_gc_mark (c_x->scm_value);
+ mark_call_count++;
+ return SCM_BOOL_F;
+}
+
+static size_t
+free_x (SCM x)
+{
+ x_t *c_x;
+ c_x = (x_t *) SCM_SMOB_DATA (x);
+ scm_gc_free (c_x, sizeof (x_t), "x");
+ c_x = NULL;
+ return 0;
+}
+
+static int
+print_x (SCM x, SCM port, scm_print_state * pstate SCM_UNUSED)
+{
+ x_t *c_x = (x_t *) SCM_SMOB_DATA (x);
+ scm_puts ("#<x ", port);
+ if (c_x == (x_t *) NULL)
+ scm_puts ("(freed)", port);
+ else
+ scm_write (c_x->scm_value, port);
+ scm_puts (">", port);
+
+ return 1;
+}
+
+static void
+test_scm_smob_mark ()
+{
+ int i;
+ mark_call_count = 0;
+ for (i = 0; i < SMOBS_COUNT; i++)
+ make_x ();
+ scm_gc ();
+ if (mark_call_count < SMOBS_COUNT)
+ {
+ fprintf (stderr, "FAIL: SMOB mark function called for each SMOB\n");
+ exit (EXIT_FAILURE);
+ }
+}
+
+static void
+init_smob_type ()
+{
+ x_tag = scm_make_smob_type ("x", sizeof (x_t));
+ scm_set_smob_free (x_tag, free_x);
+ scm_set_smob_print (x_tag, print_x);
+ scm_set_smob_mark (x_tag, mark_x);
+}
+
+static void
+tests (void *data, int argc, char **argv)
+{
+ init_smob_type ();
+ test_scm_smob_mark ();
+}
+
+int
+main (int argc, char *argv[])
+{
+ scm_boot_guile (argc, argv, tests, NULL);
+ return 0;
+}