-/* Copyright (C) 1995,1996,1998,1999,2000,2001, 2003, 2004, 2006, 2009 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
- */
-
-
-\f
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <stdio.h>
-#include <errno.h>
-
-#include "libguile/_scm.h"
-
-#include "libguile/async.h"
-#include "libguile/objects.h"
-#include "libguile/goops.h"
-#include "libguile/ports.h"
-
-#ifdef HAVE_MALLOC_H
-#include <malloc.h>
-#endif
-
-#include "libguile/smob.h"
-
-\f
-
-/* scm_smobs scm_numsmob
- * implement a fixed sized array of smob records.
- * Indexes into this table are used when generating type
- * tags for smobjects (if you know a tag you can get an index and conversely).
- */
-
-#define MAX_SMOB_COUNT SCM_I_MAX_SMOB_TYPE_COUNT
-
-long scm_numsmob;
-scm_smob_descriptor scm_smobs[MAX_SMOB_COUNT];
-
-/* Lower 16 bit of data must be zero.
-*/
-void
-scm_i_set_smob_flags (SCM x, scm_t_bits data)
-{
- SCM_SET_CELL_WORD_0 (x, (SCM_CELL_WORD_0 (x) & 0xFFFF) | data);
-}
-
-void
-scm_assert_smob_type (scm_t_bits tag, SCM val)
-{
- if (!SCM_SMOB_PREDICATE (tag, val))
- scm_wrong_type_arg_msg (NULL, 0, val, scm_smobs[SCM_TC2SMOBNUM(tag)].name);
-}
-
-/* {Mark}
- */
-
-/* This function is vestigial. It used to be the mark function's
- responsibility to set the mark bit on the smob or port, but now the
- generic marking routine in gc.c takes care of that, and a zero
- pointer for a mark function means "don't bother". So you never
- need scm_mark0.
-
- However, we leave it here because it's harmless to call it, and
- people out there have smob code that uses it, and there's no reason
- to make their links fail. */
-
-SCM
-scm_mark0 (SCM ptr SCM_UNUSED)
-{
- return SCM_BOOL_F;
-}
-
-SCM
-/* Dirk::FIXME: The name markcdr is misleading, since the term cdr should only
- be used for real pairs. */
-scm_markcdr (SCM ptr)
-{
- return SCM_CELL_OBJECT_1 (ptr);
-}
-
-/* {Free}
- */
-
-size_t
-scm_free0 (SCM ptr SCM_UNUSED)
-{
- return 0;
-}
-
-size_t
-scm_smob_free (SCM obj)
-{
- long n = SCM_SMOBNUM (obj);
- if (scm_smobs[n].size > 0)
- scm_gc_free ((void *) SCM_CELL_WORD_1 (obj),
- scm_smobs[n].size, SCM_SMOBNAME (n));
- return 0;
-}
-
-/* {Print}
- */
-
-int
-scm_smob_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
-{
- long n = SCM_SMOBNUM (exp);
- scm_puts ("#<", port);
- scm_puts (SCM_SMOBNAME (n) ? SCM_SMOBNAME (n) : "smob", port);
- scm_putc (' ', port);
- if (scm_smobs[n].size)
- scm_uintprint (SCM_CELL_WORD_1 (exp), 16, port);
- else
- scm_uintprint (SCM_UNPACK (exp), 16, port);
- scm_putc ('>', port);
- return 1;
-}
-
-/* {Apply}
- */
-
-#define SCM_SMOB_APPLY0(SMOB) \
- SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB)
-#define SCM_SMOB_APPLY1(SMOB, A1) \
- SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB, A1)
-#define SCM_SMOB_APPLY2(SMOB, A1, A2) \
- SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB, A1, A2)
-#define SCM_SMOB_APPLY3(SMOB, A1, A2, A3) \
- SCM_SMOB_DESCRIPTOR (SMOB).apply (SMOB, A1, A2, A3)
-
-static SCM
-scm_smob_apply_0_010 (SCM smob)
-{
- return SCM_SMOB_APPLY1 (smob, SCM_UNDEFINED);
-}
-
-static SCM
-scm_smob_apply_0_020 (SCM smob)
-{
- return SCM_SMOB_APPLY2 (smob, SCM_UNDEFINED, SCM_UNDEFINED);
-}
-
-static SCM
-scm_smob_apply_0_030 (SCM smob)
-{
- return SCM_SMOB_APPLY3 (smob, SCM_UNDEFINED, SCM_UNDEFINED, SCM_UNDEFINED);
-}
-
-static SCM
-scm_smob_apply_0_001 (SCM smob)
-{
- return SCM_SMOB_APPLY1 (smob, SCM_EOL);
-}
-
-static SCM
-scm_smob_apply_0_011 (SCM smob)
-{
- return SCM_SMOB_APPLY2 (smob, SCM_UNDEFINED, SCM_EOL);
-}
-
-static SCM
-scm_smob_apply_0_021 (SCM smob)
-{
- return SCM_SMOB_APPLY3 (smob, SCM_UNDEFINED, SCM_UNDEFINED, SCM_EOL);
-}
-
-static SCM
-scm_smob_apply_0_error (SCM smob)
-{
- scm_wrong_num_args (smob);
-}
-
-static SCM
-scm_smob_apply_1_020 (SCM smob, SCM a1)
-{
- return SCM_SMOB_APPLY2 (smob, a1, SCM_UNDEFINED);
-}
-
-static SCM
-scm_smob_apply_1_030 (SCM smob, SCM a1)
-{
- return SCM_SMOB_APPLY3 (smob, a1, SCM_UNDEFINED, SCM_UNDEFINED);
-}
-
-static SCM
-scm_smob_apply_1_001 (SCM smob, SCM a1)
-{
- return SCM_SMOB_APPLY1 (smob, scm_list_1 (a1));
-}
-
-static SCM
-scm_smob_apply_1_011 (SCM smob, SCM a1)
-{
- return SCM_SMOB_APPLY2 (smob, a1, SCM_EOL);
-}
-
-static SCM
-scm_smob_apply_1_021 (SCM smob, SCM a1)
-{
- return SCM_SMOB_APPLY3 (smob, a1, SCM_UNDEFINED, SCM_EOL);
-}
-
-static SCM
-scm_smob_apply_1_error (SCM smob, SCM a1 SCM_UNUSED)
-{
- scm_wrong_num_args (smob);
-}
-
-static SCM
-scm_smob_apply_2_030 (SCM smob, SCM a1, SCM a2)
-{
- return SCM_SMOB_APPLY3 (smob, a1, a2, SCM_UNDEFINED);
-}
-
-static SCM
-scm_smob_apply_2_001 (SCM smob, SCM a1, SCM a2)
-{
- return SCM_SMOB_APPLY1 (smob, scm_list_2 (a1, a2));
-}
-
-static SCM
-scm_smob_apply_2_011 (SCM smob, SCM a1, SCM a2)
-{
- return SCM_SMOB_APPLY2 (smob, a1, scm_list_1 (a2));
-}
-
-static SCM
-scm_smob_apply_2_021 (SCM smob, SCM a1, SCM a2)
-{
- return SCM_SMOB_APPLY3 (smob, a1, a2, SCM_EOL);
-}
-
-static SCM
-scm_smob_apply_2_error (SCM smob, SCM a1 SCM_UNUSED, SCM a2 SCM_UNUSED)
-{
- scm_wrong_num_args (smob);
-}
-
-static SCM
-scm_smob_apply_3_030 (SCM smob, SCM a1, SCM a2, SCM rst)
-{
- if (!scm_is_null (SCM_CDR (rst)))
- scm_wrong_num_args (smob);
- return SCM_SMOB_APPLY3 (smob, a1, a2, SCM_CAR (rst));
-}
-
-static SCM
-scm_smob_apply_3_001 (SCM smob, SCM a1, SCM a2, SCM rst)
-{
- return SCM_SMOB_APPLY1 (smob, scm_cons2 (a1, a2, rst));
-}
-
-static SCM
-scm_smob_apply_3_011 (SCM smob, SCM a1, SCM a2, SCM rst)
-{
- return SCM_SMOB_APPLY2 (smob, a1, scm_cons (a2, rst));
-}
-
-static SCM
-scm_smob_apply_3_021 (SCM smob, SCM a1, SCM a2, SCM rst)
-{
- return SCM_SMOB_APPLY3 (smob, a1, a2, rst);
-}
-
-static SCM
-scm_smob_apply_3_error (SCM smob,
- SCM a1 SCM_UNUSED,
- SCM a2 SCM_UNUSED,
- SCM rst SCM_UNUSED)
-{
- scm_wrong_num_args (smob);
-}
-
-\f
-
-scm_t_bits
-scm_make_smob_type (char const *name, size_t size)
-#define FUNC_NAME "scm_make_smob_type"
-{
- long new_smob;
-
- SCM_CRITICAL_SECTION_START;
- new_smob = scm_numsmob;
- if (scm_numsmob != MAX_SMOB_COUNT)
- ++scm_numsmob;
- SCM_CRITICAL_SECTION_END;
-
- if (new_smob == MAX_SMOB_COUNT)
- scm_misc_error (FUNC_NAME, "maximum number of smobs exceeded", SCM_EOL);
-
- scm_smobs[new_smob].name = name;
- if (size != 0)
- {
- scm_smobs[new_smob].size = size;
- scm_smobs[new_smob].free = scm_smob_free;
- }
-
- /* Make a class object if Goops is present. */
- if (SCM_UNPACK (scm_smob_class[0]) != 0)
- scm_smob_class[new_smob] = scm_make_extended_class (name, 0);
-
- return scm_tc7_smob + new_smob * 256;
-}
-#undef FUNC_NAME
-
-
-void
-scm_set_smob_mark (scm_t_bits tc, SCM (*mark) (SCM))
-{
- scm_smobs[SCM_TC2SMOBNUM (tc)].mark = mark;
-}
-
-void
-scm_set_smob_free (scm_t_bits tc, size_t (*free) (SCM))
-{
- scm_smobs[SCM_TC2SMOBNUM (tc)].free = free;
-}
-
-void
-scm_set_smob_print (scm_t_bits tc, int (*print) (SCM, SCM, scm_print_state*))
-{
- scm_smobs[SCM_TC2SMOBNUM (tc)].print = print;
-}
-
-void
-scm_set_smob_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM))
-{
- scm_smobs[SCM_TC2SMOBNUM (tc)].equalp = equalp;
-}
-
-void
-scm_set_smob_apply (scm_t_bits tc, SCM (*apply) (),
- unsigned int req, unsigned int opt, unsigned int rst)
-{
- SCM (*apply_0) (SCM);
- SCM (*apply_1) (SCM, SCM);
- SCM (*apply_2) (SCM, SCM, SCM);
- SCM (*apply_3) (SCM, SCM, SCM, SCM);
- int type = SCM_GSUBR_MAKTYPE (req, opt, rst);
-
- if (rst > 1 || req + opt + rst > 3)
- {
- puts ("Unsupported smob application type");
- abort ();
- }
-
- switch (type)
- {
- case SCM_GSUBR_MAKTYPE (0, 0, 0):
- apply_0 = apply; break;
- case SCM_GSUBR_MAKTYPE (0, 1, 0):
- apply_0 = scm_smob_apply_0_010; break;
- case SCM_GSUBR_MAKTYPE (0, 2, 0):
- apply_0 = scm_smob_apply_0_020; break;
- case SCM_GSUBR_MAKTYPE (0, 3, 0):
- apply_0 = scm_smob_apply_0_030; break;
- case SCM_GSUBR_MAKTYPE (0, 0, 1):
- apply_0 = scm_smob_apply_0_001; break;
- case SCM_GSUBR_MAKTYPE (0, 1, 1):
- apply_0 = scm_smob_apply_0_011; break;
- case SCM_GSUBR_MAKTYPE (0, 2, 1):
- apply_0 = scm_smob_apply_0_021; break;
- default:
- apply_0 = scm_smob_apply_0_error; break;
- }
-
- switch (type)
- {
- case SCM_GSUBR_MAKTYPE (1, 0, 0):
- case SCM_GSUBR_MAKTYPE (0, 1, 0):
- apply_1 = apply; break;
- case SCM_GSUBR_MAKTYPE (1, 1, 0):
- case SCM_GSUBR_MAKTYPE (0, 2, 0):
- apply_1 = scm_smob_apply_1_020; break;
- case SCM_GSUBR_MAKTYPE (1, 2, 0):
- case SCM_GSUBR_MAKTYPE (0, 3, 0):
- apply_1 = scm_smob_apply_1_030; break;
- case SCM_GSUBR_MAKTYPE (0, 0, 1):
- apply_1 = scm_smob_apply_1_001; break;
- case SCM_GSUBR_MAKTYPE (1, 0, 1):
- case SCM_GSUBR_MAKTYPE (0, 1, 1):
- apply_1 = scm_smob_apply_1_011; break;
- case SCM_GSUBR_MAKTYPE (1, 1, 1):
- case SCM_GSUBR_MAKTYPE (0, 2, 1):
- apply_1 = scm_smob_apply_1_021; break;
- default:
- apply_1 = scm_smob_apply_1_error; break;
- }
-
- switch (type)
- {
- case SCM_GSUBR_MAKTYPE (2, 0, 0):
- case SCM_GSUBR_MAKTYPE (1, 1, 0):
- case SCM_GSUBR_MAKTYPE (0, 2, 0):
- apply_2 = apply; break;
- case SCM_GSUBR_MAKTYPE (2, 1, 0):
- case SCM_GSUBR_MAKTYPE (1, 2, 0):
- case SCM_GSUBR_MAKTYPE (0, 3, 0):
- apply_2 = scm_smob_apply_2_030; break;
- case SCM_GSUBR_MAKTYPE (0, 0, 1):
- apply_2 = scm_smob_apply_2_001; break;
- case SCM_GSUBR_MAKTYPE (1, 0, 1):
- case SCM_GSUBR_MAKTYPE (0, 1, 1):
- apply_2 = scm_smob_apply_2_011; break;
- case SCM_GSUBR_MAKTYPE (2, 0, 1):
- case SCM_GSUBR_MAKTYPE (1, 1, 1):
- case SCM_GSUBR_MAKTYPE (0, 2, 1):
- apply_2 = scm_smob_apply_2_021; break;
- default:
- apply_2 = scm_smob_apply_2_error; break;
- }
-
- switch (type)
- {
- case SCM_GSUBR_MAKTYPE (3, 0, 0):
- case SCM_GSUBR_MAKTYPE (2, 1, 0):
- case SCM_GSUBR_MAKTYPE (1, 2, 0):
- case SCM_GSUBR_MAKTYPE (0, 3, 0):
- apply_3 = scm_smob_apply_3_030; break;
- case SCM_GSUBR_MAKTYPE (0, 0, 1):
- apply_3 = scm_smob_apply_3_001; break;
- case SCM_GSUBR_MAKTYPE (1, 0, 1):
- case SCM_GSUBR_MAKTYPE (0, 1, 1):
- apply_3 = scm_smob_apply_3_011; break;
- case SCM_GSUBR_MAKTYPE (2, 0, 1):
- case SCM_GSUBR_MAKTYPE (1, 1, 1):
- case SCM_GSUBR_MAKTYPE (0, 2, 1):
- apply_3 = scm_smob_apply_3_021; break;
- default:
- apply_3 = scm_smob_apply_3_error; break;
- }
-
- scm_smobs[SCM_TC2SMOBNUM (tc)].apply = apply;
- scm_smobs[SCM_TC2SMOBNUM (tc)].apply_0 = apply_0;
- scm_smobs[SCM_TC2SMOBNUM (tc)].apply_1 = apply_1;
- scm_smobs[SCM_TC2SMOBNUM (tc)].apply_2 = apply_2;
- scm_smobs[SCM_TC2SMOBNUM (tc)].apply_3 = apply_3;
- scm_smobs[SCM_TC2SMOBNUM (tc)].gsubr_type = type;
-
- if (SCM_UNPACK (scm_smob_class[0]) != 0)
- scm_i_inherit_applicable (scm_smob_class[SCM_TC2SMOBNUM (tc)]);
-}
-
-SCM
-scm_make_smob (scm_t_bits tc)
-{
- long n = SCM_TC2SMOBNUM (tc);
- size_t size = scm_smobs[n].size;
- scm_t_bits data = (size > 0
- ? (scm_t_bits) scm_gc_malloc (size, SCM_SMOBNAME (n))
- : 0);
- return scm_cell (tc, data);
-}
-
-\f
-/* {Initialization for the type of free cells}
- */
-
-static int
-free_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
-{
- char buf[100];
- sprintf (buf, "#<freed cell %p; GC missed a reference>",
- (void *) SCM_UNPACK (exp));
- scm_puts (buf, port);
-
-#if (SCM_DEBUG_CELL_ACCESSES == 1)
- if (scm_debug_cell_accesses_p)
- abort();
-#endif
-
-
- return 1;
-}
-
-void
-scm_smob_prehistory ()
-{
- long i;
- scm_t_bits tc;
-
- scm_numsmob = 0;
- for (i = 0; i < MAX_SMOB_COUNT; ++i)
- {
- scm_smobs[i].name = 0;
- scm_smobs[i].size = 0;
- scm_smobs[i].mark = 0;
- scm_smobs[i].free = 0;
- scm_smobs[i].print = scm_smob_print;
- scm_smobs[i].equalp = 0;
- scm_smobs[i].apply = 0;
- scm_smobs[i].apply_0 = 0;
- scm_smobs[i].apply_1 = 0;
- scm_smobs[i].apply_2 = 0;
- scm_smobs[i].apply_3 = 0;
- scm_smobs[i].gsubr_type = 0;
- }
-
- /* WARNING: This scm_make_smob_type call must be done first. */
- tc = scm_make_smob_type ("free", 0);
- scm_set_smob_print (tc, free_print);
-}
-
-/*
- Local Variables:
- c-file-style: "gnu"
- End:
-*/
+/* Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2003, 2004, 2006,
+ * 2009, 2010, 2011, 2012, 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
+ */
+
+
+\f
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "libguile/_scm.h"
+
+#include "libguile/async.h"
+#include "libguile/goops.h"
+#include "libguile/instructions.h"
+#include "libguile/objcodes.h"
+#include "libguile/programs.h"
+
+#include "libguile/smob.h"
+
+#include "libguile/bdw-gc.h"
+#include <gc/gc_mark.h>
+
+
+\f
+
+/* scm_smobs scm_numsmob
+ * implement a fixed sized array of smob records.
+ * Indexes into this table are used when generating type
+ * tags for smobjects (if you know a tag you can get an index and conversely).
+ */
+
+#define MAX_SMOB_COUNT SCM_I_MAX_SMOB_TYPE_COUNT
+
+long scm_numsmob;
+scm_smob_descriptor scm_smobs[MAX_SMOB_COUNT];
+
+void
+scm_assert_smob_type (scm_t_bits tag, SCM val)
+{
+ if (!SCM_SMOB_PREDICATE (tag, val))
+ scm_wrong_type_arg_msg (NULL, 0, val, scm_smobs[SCM_TC2SMOBNUM(tag)].name);
+}
+
+/* {Mark}
+ */
+
+/* This function is vestigial. It used to be the mark function's
+ responsibility to set the mark bit on the smob or port, but now the
+ generic marking routine in gc.c takes care of that, and a zero
+ pointer for a mark function means "don't bother". So you never
+ need scm_mark0.
+
+ However, we leave it here because it's harmless to call it, and
+ people out there have smob code that uses it, and there's no reason
+ to make their links fail. */
+
+SCM
+scm_mark0 (SCM ptr SCM_UNUSED)
+{
+ return SCM_BOOL_F;
+}
+
+SCM
+/* Dirk::FIXME: The name markcdr is misleading, since the term cdr should only
+ be used for real pairs. */
+scm_markcdr (SCM ptr)
+{
+ return SCM_CELL_OBJECT_1 (ptr);
+}
+
+\f
+/* {Free}
+ */
+
+size_t
+scm_free0 (SCM ptr SCM_UNUSED)
+{
+ return 0;
+}
+
+\f
+/* {Print}
+ */
+
+int
+scm_smob_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
+{
+ long n = SCM_SMOBNUM (exp);
+ scm_puts ("#<", port);
+ scm_puts (SCM_SMOBNAME (n) ? SCM_SMOBNAME (n) : "smob", port);
+ scm_putc (' ', port);
+ if (scm_smobs[n].size)
+ scm_uintprint (SCM_CELL_WORD_1 (exp), 16, port);
+ else
+ scm_uintprint (SCM_UNPACK (exp), 16, port);
+ scm_putc ('>', port);
+ return 1;
+}
+
+\f
+/* {Apply}
+ */
+
+static SCM scm_smob_trampolines[16];
+
+/* (nargs * nargs) + nopt + rest * (nargs + 1) */
+#define SCM_SMOB_TRAMPOLINE(nreq,nopt,rest) \
+ scm_smob_trampolines[(nreq + nopt + rest) * (nreq + nopt + rest) \
+ + nopt + rest * (nreq + nopt + rest + 1)]
+
+static SCM
+apply_0 (SCM smob)
+{
+ SCM (*subr)() = SCM_SMOB_DESCRIPTOR (smob).apply;
+ return subr (smob);
+}
+
+static SCM
+apply_1 (SCM smob, SCM a)
+{
+ SCM (*subr)() = SCM_SMOB_DESCRIPTOR (smob).apply;
+ return subr (smob, a);
+}
+
+static SCM
+apply_2 (SCM smob, SCM a, SCM b)
+{
+ SCM (*subr)() = SCM_SMOB_DESCRIPTOR (smob).apply;
+ return subr (smob, a, b);
+}
+
+static SCM
+apply_3 (SCM smob, SCM a, SCM b, SCM c)
+{
+ SCM (*subr)() = SCM_SMOB_DESCRIPTOR (smob).apply;
+ return subr (smob, a, b, c);
+}
+
+static SCM
+scm_smob_trampoline (unsigned int nreq, unsigned int nopt,
+ unsigned int rest)
+{
+ SCM trampoline;
+
+ if (SCM_UNLIKELY (rest > 1 || nreq + nopt + rest > 3))
+ scm_out_of_range ("make-smob", scm_from_uint (nreq + nopt + rest));
+
+ trampoline = SCM_SMOB_TRAMPOLINE (nreq, nopt, rest);
+
+ if (SCM_LIKELY (SCM_UNPACK (trampoline)))
+ return trampoline;
+
+ switch (nreq + nopt + rest)
+ {
+ /* The + 1 is for the smob itself. */
+ case 0:
+ trampoline = scm_c_make_gsubr ("apply-smob/0", nreq + 1, nopt, rest,
+ apply_0);
+ break;
+ case 1:
+ trampoline = scm_c_make_gsubr ("apply-smob/1", nreq + 1, nopt, rest,
+ apply_1);
+ break;
+ case 2:
+ trampoline = scm_c_make_gsubr ("apply-smob/2", nreq + 1, nopt, rest,
+ apply_2);
+ break;
+ case 3:
+ trampoline = scm_c_make_gsubr ("apply-smob/3", nreq + 1, nopt, rest,
+ apply_3);
+ break;
+ default:
+ abort ();
+ }
+
+ SCM_SMOB_TRAMPOLINE (nreq, nopt, rest) = trampoline;
+
+ return trampoline;
+}
+
+\f
+
+scm_t_bits
+scm_make_smob_type (char const *name, size_t size)
+#define FUNC_NAME "scm_make_smob_type"
+{
+ long new_smob;
+
+ SCM_CRITICAL_SECTION_START;
+ new_smob = scm_numsmob;
+ if (scm_numsmob != MAX_SMOB_COUNT)
+ ++scm_numsmob;
+ SCM_CRITICAL_SECTION_END;
+
+ if (new_smob == MAX_SMOB_COUNT)
+ scm_misc_error (FUNC_NAME, "maximum number of smobs exceeded", SCM_EOL);
+
+ scm_smobs[new_smob].name = name;
+ scm_smobs[new_smob].size = size;
+
+ /* Make a class object if Goops is present. */
+ if (SCM_UNPACK (scm_smob_class[0]) != 0)
+ scm_smob_class[new_smob] = scm_make_extended_class (name, 0);
+
+ return scm_tc7_smob + new_smob * 256;
+}
+#undef FUNC_NAME
+
+
+void
+scm_set_smob_mark (scm_t_bits tc, SCM (*mark) (SCM))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].mark = mark;
+}
+
+void
+scm_set_smob_free (scm_t_bits tc, size_t (*free) (SCM))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].free = free;
+}
+
+void
+scm_set_smob_print (scm_t_bits tc, int (*print) (SCM, SCM, scm_print_state*))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].print = print;
+}
+
+void
+scm_set_smob_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM))
+{
+ scm_smobs[SCM_TC2SMOBNUM (tc)].equalp = equalp;
+}
+
+void
+scm_set_smob_apply (scm_t_bits tc, SCM (*apply) (),
+ unsigned int req, unsigned int opt, unsigned int rst)
+{
+ SCM trampoline = scm_smob_trampoline (req, opt, rst);
+
+ scm_smobs[SCM_TC2SMOBNUM (tc)].apply = apply;
+ /* In 2.2 this field is renamed to "apply_trampoline". */
+ scm_smobs[SCM_TC2SMOBNUM (tc)].apply_trampoline_objcode = trampoline;
+
+ if (SCM_UNPACK (scm_smob_class[0]) != 0)
+ scm_i_inherit_applicable (scm_smob_class[SCM_TC2SMOBNUM (tc)]);
+}
+
+SCM
+scm_make_smob (scm_t_bits tc)
+{
+ scm_t_bits n = SCM_TC2SMOBNUM (tc);
+ size_t size = scm_smobs[n].size;
+ scm_t_bits data = (size > 0
+ ? (scm_t_bits) scm_gc_malloc (size, SCM_SMOBNAME (n))
+ : 0);
+
+ SCM_RETURN_NEWSMOB (tc, data);
+}
+
+
+\f
+/* Marking SMOBs using user-supplied mark procedures. */
+
+
+/* The GC kind used for SMOB types that provide a custom mark procedure. */
+static int smob_gc_kind;
+
+/* Mark stack pointer and limit, used by `scm_gc_mark'. */
+static scm_i_pthread_key_t current_mark_stack_pointer;
+static scm_i_pthread_key_t current_mark_stack_limit;
+
+
+/* The generic SMOB mark procedure that gets called for SMOBs allocated
+ with smob_gc_kind. */
+static struct GC_ms_entry *
+smob_mark (GC_word *addr, struct GC_ms_entry *mark_stack_ptr,
+ struct GC_ms_entry *mark_stack_limit, GC_word env)
+{
+ register SCM cell;
+ register scm_t_bits tc, smobnum;
+
+ cell = PTR2SCM (addr);
+
+ if (SCM_TYP7 (cell) != scm_tc7_smob)
+ /* It is likely that the GC passed us a pointer to a free-list element
+ which we must ignore (see warning in `gc/gc_mark.h'). */
+ return mark_stack_ptr;
+
+ tc = SCM_CELL_WORD_0 (cell);
+ smobnum = SCM_TC2SMOBNUM (tc);
+
+ if (smobnum >= scm_numsmob)
+ /* The first word looks corrupt. */
+ abort ();
+
+ mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (SCM_CELL_OBJECT_1 (cell)),
+ mark_stack_ptr,
+ mark_stack_limit, NULL);
+ mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (SCM_CELL_OBJECT_2 (cell)),
+ mark_stack_ptr,
+ mark_stack_limit, NULL);
+ mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (SCM_CELL_OBJECT_3 (cell)),
+ mark_stack_ptr,
+ mark_stack_limit, NULL);
+
+ if (scm_smobs[smobnum].mark)
+ {
+ SCM obj;
+
+ scm_i_pthread_setspecific (current_mark_stack_pointer, mark_stack_ptr);
+ scm_i_pthread_setspecific (current_mark_stack_limit, mark_stack_limit);
+
+ /* Invoke the SMOB's mark procedure, which will in turn invoke
+ `scm_gc_mark', which may modify `current_mark_stack_pointer'. */
+ obj = scm_smobs[smobnum].mark (cell);
+
+ mark_stack_ptr = scm_i_pthread_getspecific (current_mark_stack_pointer);
+
+ if (SCM_NIMP (obj))
+ /* Mark the returned object. */
+ mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (obj),
+ mark_stack_ptr,
+ mark_stack_limit, NULL);
+
+ scm_i_pthread_setspecific (current_mark_stack_pointer, NULL);
+ scm_i_pthread_setspecific (current_mark_stack_limit, NULL);
+ }
+
+ return mark_stack_ptr;
+
+}
+
+/* Mark object O. We assume that this function is only called during the mark
+ phase, i.e., from within `smob_mark' or one of its descendants. */
+void
+scm_gc_mark (SCM o)
+{
+ if (SCM_NIMP (o))
+ {
+ void *mark_stack_ptr, *mark_stack_limit;
+
+ mark_stack_ptr = scm_i_pthread_getspecific (current_mark_stack_pointer);
+ mark_stack_limit = scm_i_pthread_getspecific (current_mark_stack_limit);
+
+ if (mark_stack_ptr == NULL)
+ /* The function was not called from a mark procedure. */
+ abort ();
+
+ mark_stack_ptr = GC_MARK_AND_PUSH (SCM2PTR (o),
+ mark_stack_ptr, mark_stack_limit,
+ NULL);
+ scm_i_pthread_setspecific (current_mark_stack_pointer, mark_stack_ptr);
+ }
+}
+
+\f
+/* Finalize SMOB by calling its SMOB type's free function, if any. */
+static void
+finalize_smob (void *ptr, void *data)
+{
+ SCM smob;
+ size_t (* free_smob) (SCM);
+
+ smob = PTR2SCM (ptr);
+#if 0
+ printf ("finalizing SMOB %p (smobnum: %u)\n",
+ ptr, SCM_SMOBNUM (smob));
+#endif
+
+ free_smob = scm_smobs[SCM_SMOBNUM (smob)].free;
+ if (free_smob)
+ free_smob (smob);
+}
+
+/* Return a SMOB with typecode TC. The SMOB type corresponding to TC may
+ provide a custom mark procedure and it will be honored. */
+SCM
+scm_i_new_smob (scm_t_bits tc, scm_t_bits data)
+{
+ scm_t_bits smobnum = SCM_TC2SMOBNUM (tc);
+ SCM ret;
+
+ /* Use the smob_gc_kind if needed to allow the mark procedure to
+ run. Since the marker only deals with double cells, that case
+ allocates a double cell. We leave words 2 and 3 to there initial
+ values, which is 0. */
+ if (scm_smobs [smobnum].mark)
+ ret = PTR2SCM (GC_generic_malloc (2 * sizeof (scm_t_cell), smob_gc_kind));
+ else
+ ret = PTR2SCM (GC_MALLOC (sizeof (scm_t_cell)));
+
+ SCM_SET_CELL_WORD_1 (ret, data);
+ SCM_SET_CELL_WORD_0 (ret, tc);
+
+ if (scm_smobs[smobnum].free)
+ scm_i_set_finalizer (SCM2PTR (ret), finalize_smob, NULL);
+
+ return ret;
+}
+
+/* Return a SMOB with typecode TC. The SMOB type corresponding to TC may
+ provide a custom mark procedure and it will be honored. */
+SCM
+scm_i_new_double_smob (scm_t_bits tc, scm_t_bits data1,
+ scm_t_bits data2, scm_t_bits data3)
+{
+ scm_t_bits smobnum = SCM_TC2SMOBNUM (tc);
+ SCM ret;
+
+ /* Use the smob_gc_kind if needed to allow the mark procedure to
+ run. */
+ if (scm_smobs [smobnum].mark)
+ ret = PTR2SCM (GC_generic_malloc (2 * sizeof (scm_t_cell), smob_gc_kind));
+ else
+ ret = PTR2SCM (GC_MALLOC (2 * sizeof (scm_t_cell)));
+
+ SCM_SET_CELL_WORD_3 (ret, data3);
+ SCM_SET_CELL_WORD_2 (ret, data2);
+ SCM_SET_CELL_WORD_1 (ret, data1);
+ SCM_SET_CELL_WORD_0 (ret, tc);
+
+ if (scm_smobs[smobnum].free)
+ scm_i_set_finalizer (SCM2PTR (ret), finalize_smob, NULL);
+
+ return ret;
+}
+
+
+\f
+
+/* These two are internal details of the previous implementation of
+ SCM_NEWSMOB and are no longer used. They are still here to preserve
+ ABI stability in the 2.0 series. */
+void
+scm_i_finalize_smob (void *ptr, void *data)
+{
+ finalize_smob (ptr, data);
+}
+
+SCM
+scm_i_new_smob_with_mark_proc (scm_t_bits tc, scm_t_bits word1,
+ scm_t_bits word2, scm_t_bits word3)
+{
+ return scm_new_double_smob (tc, word1, word2, word3);
+}
+
+
+\f
+void
+scm_smob_prehistory ()
+{
+ long i;
+
+ scm_i_pthread_key_create (¤t_mark_stack_pointer, NULL);
+ scm_i_pthread_key_create (¤t_mark_stack_limit, NULL);
+
+ smob_gc_kind = GC_new_kind (GC_new_free_list (),
+ GC_MAKE_PROC (GC_new_proc (smob_mark), 0),
+ 0,
+ /* Clear new objects. As of version 7.1, libgc
+ doesn't seem to support passing 0 here. */
+ 1);
+
+ scm_numsmob = 0;
+ for (i = 0; i < MAX_SMOB_COUNT; ++i)
+ {
+ scm_smobs[i].name = 0;
+ scm_smobs[i].size = 0;
+ scm_smobs[i].mark = 0;
+ scm_smobs[i].free = 0;
+ scm_smobs[i].print = scm_smob_print;
+ scm_smobs[i].equalp = 0;
+ scm_smobs[i].apply = 0;
+ scm_smobs[i].apply_trampoline_objcode = SCM_BOOL_F;
+ }
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff