--- /dev/null
+/* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+ *
+ * This program 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 2, or (at your option)
+ * any later version.
+ *
+ * This program 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 USA
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE. If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way. To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice. */
+\f
+
+/* This software is a derivative work of other copyrighted softwares; the
+ * copyright notices of these softwares are placed in the file COPYRIGHTS
+ *
+ * This file is based upon stklos.c from the STk distribution by
+ * Erick Gallesio <eg@unice.fr>.
+ */
+
+#include <stdio.h>
+
+#include "libguile/_scm.h"
+#include "libguile/alist.h"
+#include "libguile/debug.h"
+#include "libguile/dynl.h"
+#include "libguile/dynwind.h"
+#include "libguile/eval.h"
+#include "libguile/hashtab.h"
+#include "libguile/keywords.h"
+#include "libguile/macros.h"
+#include "libguile/modules.h"
+#include "libguile/objects.h"
+#include "libguile/ports.h"
+#include "libguile/procprop.h"
+#include "libguile/random.h"
+#include "libguile/smob.h"
+#include "libguile/strings.h"
+#include "libguile/strports.h"
+#include "libguile/vectors.h"
+#include "libguile/weaks.h"
+
+#include "libguile/goops.h"
+
+#define CLASSP(x) (SCM_STRUCTP (x) \
+ && SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_METACLASS)
+#define GENERICP(x) (SCM_INSTANCEP (x) \
+ && SCM_SUBCLASSP (SCM_CLASS_OF (x), scm_class_generic))
+#define METHODP(x) (SCM_INSTANCEP (x) \
+ && SCM_SUBCLASSP(SCM_CLASS_OF(x), scm_class_method))
+#define SPEC_OF(x) SCM_SLOT (x, scm_si_specializers)
+
+
+#define DEFVAR(v,val) \
+{ scm_eval2 (SCM_LIST3 (scm_sym_define_public, (v), (val)), \
+ scm_goops_lookup_closure); }
+/* Temporary hack until we get the new module system */
+/*fixme* Should optimize by keeping track of the variable object itself */
+#define GETVAR(v) (SCM_CDDR (scm_apply (scm_goops_lookup_closure, \
+ SCM_LIST2 ((v), SCM_BOOL_F), \
+ SCM_EOL)))
+static SCM
+Intern (const char *s)
+{
+ return SCM_CAR (scm_intern (s, strlen (s)));
+}
+
+/* Fixme: Should use already interned symbols */
+#define CALL_GF1(name,a) (scm_apply (GETVAR (Intern(name)), \
+ SCM_LIST1 (a), SCM_EOL))
+#define CALL_GF2(name,a,b) (scm_apply (GETVAR (Intern(name)), \
+ SCM_LIST2 (a, b), SCM_EOL))
+#define CALL_GF3(name,a,b,c) (scm_apply (GETVAR (Intern(name)), \
+ SCM_LIST3 (a, b, c), SCM_EOL))
+#define CALL_GF4(name,a,b,c,d) (scm_apply (GETVAR (Intern(name)), \
+ SCM_LIST4 (a, b, c, d), SCM_EOL))
+
+/* Class redefinition protocol:
+
+ A class is represented by a heap header h1 which points to a
+ malloc:ed memory block m1.
+
+ When a new version of a class is created, a new header h2 and
+ memory block m2 are allocated. The headers h1 and h2 then switch
+ pointers so that h1 refers to m2 and h2 to m1. In this way, names
+ bound to h1 will point to the new class at the same time as h2 will
+ be a handle which the GC will us to free m1.
+
+ The `redefined' slot of m1 will be set to point to h1. An old
+ instance will have it's class pointer (the CAR of the heap header)
+ pointing to m1. The non-immediate `redefined'-slot in m1 indicates
+ the class modification and the new class pointer can be found via
+ h1.
+*/
+
+#define SCM_CLASS_REDEF(c) SCM_SLOT (c, scm_si_redefined)
+/* The following definition is located in libguile/objects.h:
+#define SCM_OBJ_CLASS_REDEF(x) (SCM_STRUCT_VTABLE_DATA(x)[scm_si_redefined])
+*/
+
+#define TEST_CHANGE_CLASS(obj, class) \
+ { \
+ class = SCM_CLASS_OF (obj); \
+ if (SCM_OBJ_CLASS_REDEF (obj) != SCM_BOOL_F) \
+ CALL_GF3 ("change-object-class", \
+ obj, class, SCM_OBJ_CLASS_REDEF (obj)); \
+ }
+
+#define NXT_MTHD_METHODS(m) (SCM_VELTS (m)[1])
+#define NXT_MTHD_ARGS(m) (SCM_VELTS (m)[2])
+
+#define SCM_GOOPS_UNBOUND SCM_UNBOUND
+#define SCM_GOOPS_UNBOUNDP(x) ((x) == SCM_GOOPS_UNBOUND)
+
+static int goops_loaded_p = 0;
+static scm_rstate *goops_rstate;
+
+static SCM scm_goops_lookup_closure;
+
+/* Some classes are defined in libguile/objects.c. */
+SCM scm_class_top, scm_class_object, scm_class_class;
+SCM scm_class_entity, scm_class_entity_with_setter;
+SCM scm_class_generic, scm_class_generic_with_setter, scm_class_method;
+SCM scm_class_simple_method, scm_class_accessor;
+SCM scm_class_procedure_class;
+SCM scm_class_operator_class, scm_class_operator_with_setter_class;
+SCM scm_class_entity_class;
+SCM scm_class_number, scm_class_list;
+SCM scm_class_keyword;
+SCM scm_class_port, scm_class_input_output_port;
+SCM scm_class_input_port, scm_class_output_port;
+SCM scm_class_foreign_class, scm_class_foreign_object;
+SCM scm_class_foreign_slot;
+SCM scm_class_self, scm_class_protected;
+SCM scm_class_opaque, scm_class_read_only;
+SCM scm_class_protected_opaque, scm_class_protected_read_only;
+SCM scm_class_scm;
+SCM scm_class_int, scm_class_float, scm_class_double;
+
+SCM_SYMBOL (scm_sym_define_public, "define-public");
+
+static SCM scm_make_unbound (void);
+static SCM scm_unbound_p (SCM obj);
+
+/******************************************************************************
+ *
+ * Compute-cpl
+ *
+ * This version doesn't handle multiple-inheritance. It serves only for
+ * booting classes and will be overaloaded in Scheme
+ *
+ ******************************************************************************/
+
+#if 0
+static SCM
+compute_cpl (SCM supers, SCM res)
+{
+ return (SCM_NULLP (supers)
+ ? scm_reverse (res)
+ : compute_cpl (SCM_SLOT (SCM_CAR (supers), scm_si_direct_supers),
+ scm_cons (SCM_CAR (supers), res)));
+}
+#endif
+
+static SCM
+map (SCM (*proc) (SCM), SCM ls)
+{
+ if (SCM_IMP (ls))
+ return ls;
+ {
+ SCM res = scm_cons (proc (SCM_CAR (ls)), SCM_EOL);
+ SCM h = res;
+ ls = SCM_CDR (ls);
+ while (SCM_NIMP (ls))
+ {
+ SCM_SETCDR (h, scm_cons (proc (SCM_CAR (ls)), SCM_EOL));
+ h = SCM_CDR (h);
+ ls = SCM_CDR (ls);
+ }
+ return res;
+ }
+}
+
+static SCM
+filter_cpl (SCM ls)
+{
+ SCM res = SCM_EOL;
+ while (SCM_NIMP (ls))
+ {
+ SCM el = SCM_CAR (ls);
+ if (SCM_IMP (scm_sloppy_memq (el, res)))
+ res = scm_cons (el, res);
+ ls = SCM_CDR (ls);
+ }
+ return res;
+}
+
+static SCM
+compute_cpl (SCM class)
+{
+ if (goops_loaded_p)
+ return CALL_GF1 ("compute-cpl", class);
+ else
+ {
+ SCM supers = SCM_SLOT (class, scm_si_direct_supers);
+ SCM ls = scm_append (scm_acons (class, supers,
+ map (compute_cpl, supers)));
+ return scm_reverse_x (filter_cpl (ls), SCM_EOL);
+ }
+}
+
+/******************************************************************************
+ *
+ * compute-slots
+ *
+ ******************************************************************************/
+
+static SCM
+remove_duplicate_slots (SCM l, SCM res, SCM slots_already_seen)
+{
+ SCM tmp;
+
+ if (SCM_NULLP (l))
+ return res;
+
+ tmp = SCM_CAAR (l);
+ if (!(SCM_NIMP (tmp) && SCM_SYMBOLP (tmp)))
+ scm_misc_error ("%compute-slots",
+ "bad slot name ~S",
+ SCM_LIST1 (tmp));
+
+ if (SCM_NULLP (scm_sloppy_memq (tmp, slots_already_seen))) {
+ res = scm_cons (SCM_CAR (l), res);
+ slots_already_seen = scm_cons (tmp, slots_already_seen);
+ }
+
+ return remove_duplicate_slots (SCM_CDR (l), res, slots_already_seen);
+}
+
+static SCM
+build_slots_list (SCM dslots, SCM cpl)
+{
+ register SCM res = dslots;
+
+ for (cpl = SCM_CDR(cpl); SCM_NNULLP(cpl); cpl = SCM_CDR(cpl))
+ res = scm_append (SCM_LIST2 (SCM_SLOT (SCM_CAR (cpl), scm_si_direct_slots),
+ res));
+
+ /* res contains a list of slots. Remove slots which appears more than once */
+ return remove_duplicate_slots (scm_reverse (res), SCM_EOL, SCM_EOL);
+}
+
+static SCM
+maplist (SCM ls)
+{
+ SCM orig = ls;
+ while (SCM_NIMP (ls))
+ {
+ if (!(SCM_NIMP (SCM_CAR (ls)) && SCM_CONSP (SCM_CAR (ls))))
+ SCM_SETCAR (ls, scm_cons (SCM_CAR (ls), SCM_EOL));
+ ls = SCM_CDR (ls);
+ }
+ return orig;
+}
+
+SCM_PROC (s_sys_compute_slots, "%compute-slots", 1, 0, 0, scm_sys_compute_slots);
+
+SCM
+scm_sys_compute_slots (SCM class)
+{
+ SCM_ASSERT (SCM_NIMP (class) && CLASSP (class),
+ class, SCM_ARG1, s_sys_compute_slots);
+ return build_slots_list (SCM_SLOT (class, scm_si_direct_slots),
+ SCM_SLOT (class, scm_si_cpl));
+}
+
+/******************************************************************************
+ *
+ * compute-getters-n-setters
+ *
+ * This version doesn't handle slot options. It serves only for booting
+ * classes and will be overaloaded in Scheme.
+ *
+ ******************************************************************************/
+
+SCM_KEYWORD (k_init_value, "init-value");
+SCM_KEYWORD (k_init_thunk, "init-thunk");
+
+static SCM
+compute_getters_n_setters (SCM slots)
+{
+ SCM res = SCM_EOL;
+ SCM *cdrloc = &res;
+ long i = 0;
+
+ for ( ; SCM_NNULLP(slots); slots = SCM_CDR(slots))
+ {
+ SCM init = SCM_BOOL_F;
+ SCM options = SCM_CDAR (slots);
+ if (SCM_NNULLP (options))
+ {
+ init = scm_get_keyword (k_init_value, options, 0);
+ if (init)
+ init = scm_closure (SCM_LIST2 (SCM_EOL, init), SCM_EOL);
+ else
+ init = scm_get_keyword (k_init_thunk, options, SCM_BOOL_F);
+ }
+ *cdrloc = scm_cons (scm_cons (SCM_CAAR (slots),
+ scm_cons (init,
+ SCM_MAKINUM (i++))),
+ SCM_EOL);
+ cdrloc = SCM_CDRLOC (*cdrloc);
+ }
+ return res;
+}
+
+/******************************************************************************
+ *
+ * initialize-object
+ *
+ ******************************************************************************/
+
+/*fixme* Manufacture keywords in advance */
+SCM
+scm_i_get_keyword (SCM key, SCM l, int len, SCM default_value, const char *subr)
+{
+ int i;
+ for (i = 0; i < len; i += 2)
+ {
+ if (!(SCM_NIMP (SCM_CAR (l)) && SCM_KEYWORDP (SCM_CAR (l))))
+ scm_misc_error (subr,
+ "bad keyword: ~S",
+ SCM_LIST1 (SCM_CAR (l)));
+ if (SCM_CAR (l) == key)
+ return SCM_CADR (l);
+ l = SCM_CDDR (l);
+ }
+ return default_value;
+}
+
+SCM_PROC (s_get_keyword, "get-keyword", 3, 0, 0, scm_get_keyword);
+
+SCM
+scm_get_keyword (SCM key, SCM l, SCM default_value)
+{
+ int len;
+ SCM_ASSERT (SCM_NIMP (key) && SCM_KEYWORDP (key),
+ key,
+ "Bad keyword: ~S",
+ s_get_keyword);
+ len = scm_ilength (l);
+ SCM_ASSERT (len >= 0 && (len & 1) == 0, l,
+ "Bad keyword-value list: ~S",
+ s_get_keyword);
+ return scm_i_get_keyword (key, l, len, default_value, s_get_keyword);
+}
+
+SCM_PROC (s_sys_initialize_object, "%initialize-object", 2, 0, 0, scm_sys_initialize_object);
+
+SCM_KEYWORD (k_init_keyword, "init-keyword");
+
+static SCM get_slot_value (SCM class, SCM obj, SCM slotdef);
+static SCM set_slot_value (SCM class, SCM obj, SCM slotdef, SCM value);
+
+SCM
+scm_sys_initialize_object (SCM obj, SCM initargs)
+{
+ SCM tmp, get_n_set, slots;
+ SCM class = SCM_CLASS_OF (obj);
+ int n_initargs;
+
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG1, s_sys_initialize_object);
+ n_initargs = scm_ilength (initargs);
+ SCM_ASSERT ((n_initargs & 1) == 0,
+ initargs, SCM_ARG2, s_sys_initialize_object);
+
+ get_n_set = SCM_SLOT (class, scm_si_getters_n_setters);
+ slots = SCM_SLOT (class, scm_si_slots);
+
+ /* See for each slot how it must be initialized */
+ for (;
+ SCM_NNULLP (slots);
+ get_n_set = SCM_CDR (get_n_set), slots = SCM_CDR (slots))
+ {
+ SCM slot_name = SCM_CAR (slots);
+ SCM slot_value = 0;
+
+ if (SCM_NIMP (SCM_CDR (slot_name)))
+ {
+ /* This slot admits (perhaps) to be initialized at creation time */
+ int n = scm_ilength (SCM_CDR (slot_name));
+ if (n & 1) /* odd or -1 */
+ scm_misc_error (s_sys_initialize_object,
+ "class contains bogus slot definition: ~S",
+ SCM_LIST1 (slot_name));
+ tmp = scm_i_get_keyword (k_init_keyword,
+ SCM_CDR (slot_name),
+ n,
+ 0,
+ s_sys_initialize_object);
+ slot_name = SCM_CAR (slot_name);
+ if (tmp)
+ {
+ /* an initarg was provided for this slot */
+ if (!(SCM_NIMP (tmp) && SCM_KEYWORDP (tmp)))
+ scm_misc_error (s_sys_initialize_object,
+ "initarg must be a keyword. It was ~S",
+ SCM_LIST1 (tmp));
+ slot_value = scm_i_get_keyword (tmp,
+ initargs,
+ n_initargs,
+ 0,
+ s_sys_initialize_object);
+ }
+ }
+
+ if (slot_value)
+ /* set slot to provided value */
+ set_slot_value (class, obj, SCM_CAR (get_n_set), slot_value);
+ else
+ {
+ /* set slot to its :init-form if it exists */
+ tmp = SCM_CADAR (get_n_set);
+ if (tmp != SCM_BOOL_F)
+ {
+ slot_value = get_slot_value (class, obj, SCM_CAR (get_n_set));
+ if (SCM_GOOPS_UNBOUNDP (slot_value))
+ {
+ SCM env = SCM_EXTEND_ENV (SCM_EOL, SCM_EOL, SCM_ENV (tmp));
+ set_slot_value (class,
+ obj,
+ SCM_CAR (get_n_set),
+ scm_eval_body (SCM_CDR (SCM_CODE (tmp)),
+ env));
+ }
+ }
+ }
+ }
+
+ return obj;
+}
+
+
+SCM_KEYWORD (k_class, "class");
+
+SCM_PROC (s_sys_prep_layout_x, "%prep-layout!", 1, 0, 0, scm_sys_prep_layout_x);
+
+SCM
+scm_sys_prep_layout_x (SCM class)
+{
+ int i, n, len;
+ char *s, p, a;
+ SCM nfields, slots, type;
+
+ SCM_ASSERT (SCM_NIMP (class) && SCM_INSTANCEP (class),
+ class,
+ SCM_ARG1,
+ s_sys_prep_layout_x);
+ slots = SCM_SLOT (class, scm_si_slots);
+ nfields = SCM_SLOT (class, scm_si_nfields);
+ if (!SCM_INUMP (nfields) || SCM_INUM (nfields) < 0)
+ scm_misc_error (s_sys_prep_layout_x,
+ "bad value in nfields slot: ~S",
+ SCM_LIST1 (nfields));
+ n = 2 * SCM_INUM (nfields);
+ if (n < sizeof (SCM_CLASS_CLASS_LAYOUT) - 1
+ && SCM_SUBCLASSP (class, scm_class_class))
+ scm_misc_error (s_sys_prep_layout_x,
+ "class object doesn't have enough fields: ~S",
+ SCM_LIST1 (nfields));
+
+ s = n > 0 ? scm_must_malloc (n, s_sys_prep_layout_x) : 0;
+ for (i = 0; i < n; i += 2)
+ {
+ if (!(SCM_NIMP (slots) && SCM_CONSP (slots)))
+ scm_misc_error (s_sys_prep_layout_x,
+ "to few slot definitions",
+ SCM_EOL);
+ len = scm_ilength (SCM_CDAR (slots));
+ type = scm_i_get_keyword (k_class, SCM_CDAR (slots), len, SCM_BOOL_F,
+ s_sys_prep_layout_x);
+ if (SCM_NIMP (type) && SCM_SUBCLASSP (type, scm_class_foreign_slot))
+ {
+ if (SCM_SUBCLASSP (type, scm_class_self))
+ p = 's';
+ else if (SCM_SUBCLASSP (type, scm_class_protected))
+ p = 'p';
+ else
+ p = 'u';
+
+ if (SCM_SUBCLASSP (type, scm_class_opaque))
+ a = 'o';
+ else if (SCM_SUBCLASSP (type, scm_class_read_only))
+ a = 'r';
+ else
+ a = 'w';
+ }
+ else
+ {
+ p = 'p';
+ a = 'w';
+ }
+ s[i] = p;
+ s[i + 1] = a;
+ slots = SCM_CDR (slots);
+ }
+ SCM_SLOT (class, scm_si_layout) = SCM_CAR (scm_intern (s, n));
+ if (s)
+ scm_must_free (s);
+ return SCM_UNSPECIFIED;
+}
+
+static void prep_hashsets (SCM);
+
+SCM_PROC (s_sys_inherit_magic_x, "%inherit-magic!", 2, 0, 0, scm_sys_inherit_magic_x);
+
+SCM
+scm_sys_inherit_magic_x (SCM class, SCM dsupers)
+{
+ SCM ls = dsupers;
+ long flags = 0;
+ SCM_ASSERT (SCM_NIMP (class) && SCM_INSTANCEP (class),
+ class,
+ SCM_ARG1,
+ s_sys_inherit_magic_x);
+ while (SCM_NNULLP (ls))
+ {
+ SCM_ASSERT (SCM_NIMP (ls)
+ && SCM_CONSP (ls)
+ && SCM_NIMP (SCM_CAR (ls))
+ && SCM_INSTANCEP (SCM_CAR (ls)),
+ dsupers,
+ SCM_ARG2,
+ s_sys_inherit_magic_x);
+ flags |= SCM_CLASS_FLAGS (SCM_CAR (ls));
+ ls = SCM_CDR (ls);
+ }
+ flags &= SCM_CLASSF_INHERIT;
+ if (flags & SCM_CLASSF_ENTITY)
+ SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_entity);
+ else
+ {
+ int n = SCM_INUM (SCM_SLOT (class, scm_si_nfields));
+#if 0
+ /*
+ * We could avoid calling scm_must_malloc in the allocation code
+ * (in which case the following two lines are needed). Instead
+ * we make 0-slot instances non-light, so that the light case
+ * can be handled without special cases.
+ */
+ if (n == 0)
+ SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_0);
+#endif
+ if (n > 0 && !(flags & SCM_CLASSF_METACLASS))
+ {
+ /* NOTE: The following depends on scm_struct_i_size. */
+ flags |= SCM_STRUCTF_LIGHT + n * sizeof (SCM); /* use light representation */
+ SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light);
+ }
+ }
+ SCM_SET_CLASS_FLAGS (class, flags);
+
+ prep_hashsets (class);
+
+ return SCM_UNSPECIFIED;
+}
+
+void
+prep_hashsets (SCM class)
+{
+ int i;
+
+ for (i = 0; i < 7; ++i)
+ SCM_SLOT (class, scm_si_hashsets + i)
+ = SCM_PACK (scm_c_uniform32 (goops_rstate));
+}
+
+/******************************************************************************/
+
+SCM
+scm_basic_basic_make_class (SCM class, SCM name, SCM dsupers, SCM dslots)
+{
+ SCM z, cpl, slots, nfields, g_n_s;
+
+ /* Allocate one instance */
+ z = scm_make_struct (class, SCM_INUM0, SCM_EOL);
+
+ /* Initialize its slots */
+#if 0
+ cpl = compute_cpl (dsupers, SCM_LIST1(z));
+#endif
+ SCM_SLOT (z, scm_si_direct_supers) = dsupers;
+ cpl = compute_cpl (z);
+ slots = build_slots_list (maplist (dslots), cpl);
+ nfields = SCM_MAKINUM (scm_ilength (slots));
+ g_n_s = compute_getters_n_setters (slots);
+
+ SCM_SLOT(z, scm_si_name) = name;
+ SCM_SLOT(z, scm_si_direct_slots) = dslots;
+ SCM_SLOT(z, scm_si_direct_subclasses) = SCM_EOL;
+ SCM_SLOT(z, scm_si_direct_methods) = SCM_EOL;
+ SCM_SLOT(z, scm_si_cpl) = cpl;
+ SCM_SLOT(z, scm_si_slots) = slots;
+ SCM_SLOT(z, scm_si_nfields) = nfields;
+ SCM_SLOT(z, scm_si_getters_n_setters) = g_n_s;
+ SCM_SLOT(z, scm_si_redefined) = SCM_BOOL_F;
+ SCM_SLOT(z, scm_si_environment)
+ = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE);
+
+ /* Add this class in the direct-subclasses slot of dsupers */
+ {
+ SCM tmp;
+ for (tmp = dsupers; SCM_NNULLP(tmp); tmp = SCM_CDR(tmp))
+ SCM_SLOT(SCM_CAR(tmp), scm_si_direct_subclasses)
+ = scm_cons(z, SCM_SLOT(SCM_CAR(tmp), scm_si_direct_subclasses));
+ }
+
+ /* Support for the underlying structs: */
+ SCM_SET_CLASS_FLAGS (z, (class == scm_class_entity_class
+ ? (SCM_CLASSF_GOOPS_OR_VALID
+ | SCM_CLASSF_OPERATOR
+ | SCM_CLASSF_ENTITY)
+ : class == scm_class_operator_class
+ ? SCM_CLASSF_GOOPS_OR_VALID | SCM_CLASSF_OPERATOR
+ : SCM_CLASSF_GOOPS_OR_VALID));
+ return z;
+}
+
+SCM
+scm_basic_make_class (SCM class, SCM name, SCM dsupers, SCM dslots)
+{
+ SCM z = scm_basic_basic_make_class (class, name, dsupers, dslots);
+ scm_sys_inherit_magic_x (z, dsupers);
+ scm_sys_prep_layout_x (z);
+ return z;
+}
+
+/******************************************************************************/
+
+static SCM
+build_class_class_slots ()
+{
+ return maplist (
+ scm_cons (SCM_LIST3 (Intern ("layout"),
+ k_class,
+ scm_class_protected_read_only),
+ scm_cons (SCM_LIST3 (Intern ("vcell"),
+ k_class,
+ scm_class_opaque),
+ scm_cons (SCM_LIST3 (Intern ("vtable"),
+ k_class,
+ scm_class_self),
+ scm_cons (Intern ("print"),
+ scm_cons (SCM_LIST3 (Intern ("procedure"),
+ k_class,
+ scm_class_protected_opaque),
+ scm_cons (SCM_LIST3 (Intern ("setter"),
+ k_class,
+ scm_class_protected_opaque),
+ scm_cons (Intern ("redefined"),
+ scm_cons (SCM_LIST3 (Intern ("h0"),
+ k_class,
+ scm_class_int),
+ scm_cons (SCM_LIST3 (Intern ("h1"),
+ k_class,
+ scm_class_int),
+ scm_cons (SCM_LIST3 (Intern ("h2"),
+ k_class,
+ scm_class_int),
+ scm_cons (SCM_LIST3 (Intern ("h3"),
+ k_class,
+ scm_class_int),
+ scm_cons (SCM_LIST3 (Intern ("h4"),
+ k_class,
+ scm_class_int),
+ scm_cons (SCM_LIST3 (Intern ("h5"),
+ k_class,
+ scm_class_int),
+ scm_cons (SCM_LIST3 (Intern ("h6"),
+ k_class,
+ scm_class_int),
+ scm_cons (SCM_LIST3 (Intern ("h7"),
+ k_class,
+ scm_class_int),
+ scm_cons (Intern ("name"),
+ scm_cons (Intern ("direct-supers"),
+ scm_cons (Intern ("direct-slots"),
+ scm_cons (Intern ("direct-subclasses"),
+ scm_cons (Intern ("direct-methods"),
+ scm_cons (Intern ("cpl"),
+ scm_cons (Intern ("default-slot-definition-class"),
+ scm_cons (Intern ("slots"),
+ scm_cons (Intern ("getters-n-setters"), /* name-access */
+ scm_cons (Intern ("keyword-access"),
+ scm_cons (Intern ("nfields"),
+ scm_cons (Intern ("environment"),
+ SCM_EOL))))))))))))))))))))))))))));
+}
+
+static void
+create_basic_classes (void)
+{
+ /* SCM slots_of_class = build_class_class_slots (); */
+
+ /**** <scm_class_class> ****/
+ SCM cs = scm_makfrom0str (SCM_CLASS_CLASS_LAYOUT
+ + 2 * scm_vtable_offset_user);
+ SCM name = Intern ("<class>");
+ scm_class_class = scm_permanent_object (scm_make_vtable_vtable (cs,
+ SCM_INUM0,
+ SCM_EOL));
+ SCM_SET_CLASS_FLAGS (scm_class_class, (SCM_CLASSF_GOOPS_OR_VALID
+ | SCM_CLASSF_METACLASS));
+
+ SCM_SLOT(scm_class_class, scm_si_name) = name;
+ SCM_SLOT(scm_class_class, scm_si_direct_supers) = SCM_EOL; /* will be changed */
+ /* SCM_SLOT(scm_class_class, scm_si_direct_slots) = slots_of_class; */
+ SCM_SLOT(scm_class_class, scm_si_direct_subclasses)= SCM_EOL;
+ SCM_SLOT(scm_class_class, scm_si_direct_methods) = SCM_EOL;
+ SCM_SLOT(scm_class_class, scm_si_cpl) = SCM_EOL; /* will be changed */
+ /* SCM_SLOT(scm_class_class, scm_si_slots) = slots_of_class; */
+ SCM_SLOT(scm_class_class, scm_si_nfields) = SCM_MAKINUM (SCM_N_CLASS_SLOTS);
+ /* SCM_SLOT(scm_class_class, scm_si_getters_n_setters)
+ = compute_getters_n_setters (slots_of_class); */
+ SCM_SLOT(scm_class_class, scm_si_redefined) = SCM_BOOL_F;
+ SCM_SLOT(scm_class_class, scm_si_environment)
+ = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE);
+
+ prep_hashsets (scm_class_class);
+
+ DEFVAR(name, scm_class_class);
+
+ /**** <scm_class_top> ****/
+ name = Intern ("<top>");
+ scm_class_top = scm_permanent_object (scm_basic_make_class (scm_class_class,
+ name,
+ SCM_EOL,
+ SCM_EOL));
+
+ DEFVAR(name, scm_class_top);
+
+ /**** <scm_class_object> ****/
+ name = Intern("<object>");
+ scm_class_object = scm_permanent_object (scm_basic_make_class (scm_class_class,
+ name,
+ SCM_LIST1 (scm_class_top),
+ SCM_EOL));
+
+ DEFVAR (name, scm_class_object);
+
+ /* <top> <object> and <class> were partially initialized. Correct them here */
+ SCM_SLOT (scm_class_object, scm_si_direct_subclasses) = SCM_LIST1 (scm_class_class);
+
+ SCM_SLOT (scm_class_class, scm_si_direct_supers) = SCM_LIST1 (scm_class_object);
+ SCM_SLOT (scm_class_class, scm_si_cpl) = SCM_LIST3 (scm_class_class, scm_class_object, scm_class_top);
+}
+
+/******************************************************************************/
+
+SCM_PROC (s_instance_p, "instance?", 1, 0, 0, scm_instance_p);
+
+SCM
+scm_instance_p (SCM obj)
+{
+ return SCM_NIMP (obj) && SCM_INSTANCEP (obj) ? SCM_BOOL_T : SCM_BOOL_F;
+}
+
+SCM_PROC (s_class_of, "class-of", 1, 0, 0, scm_class_of);
+/* scm_class_of is defined in libguile */
+
+/******************************************************************************
+ *
+ * Meta object accessors
+ *
+ ******************************************************************************/
+SCM_PROC (s_class_name, "class-name", 1, 0, 0, scm_class_name);
+
+SCM
+scm_class_name (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), obj, SCM_ARG1, s_class_name);
+ return scm_slot_ref (obj, Intern ("name"));
+}
+
+SCM_PROC (s_class_direct_supers, "class-direct-supers", 1, 0, 0, scm_class_direct_supers);
+
+SCM
+scm_class_direct_supers (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), obj, SCM_ARG1, s_class_direct_supers);
+ return scm_slot_ref (obj, Intern("direct-supers"));
+}
+
+SCM_PROC (s_class_direct_slots, "class-direct-slots", 1, 0, 0, scm_class_direct_slots);
+
+SCM
+scm_class_direct_slots (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj),
+ obj, SCM_ARG1, s_class_direct_slots);
+ return scm_slot_ref (obj, Intern ("direct-slots"));
+}
+
+SCM_PROC (s_class_direct_subclasses, "class-direct-subclasses", 1, 0, 0, scm_class_direct_subclasses);
+
+SCM
+scm_class_direct_subclasses (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj),
+ obj, SCM_ARG1, s_class_direct_subclasses);
+ return scm_slot_ref(obj, Intern ("direct-subclasses"));
+}
+
+SCM_PROC (s_class_direct_methods, "class-direct-methods", 1, 0, 0, scm_class_direct_methods);
+
+SCM
+scm_class_direct_methods (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj),
+ obj, SCM_ARG1, s_class_direct_methods);
+ return scm_slot_ref (obj, Intern("direct-methods"));
+}
+
+SCM_PROC (s_class_direct_precedence_list, "class-precedence-list", 1, 0, 0, scm_class_precedence_list);
+
+SCM
+scm_class_precedence_list (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj),
+ obj, SCM_ARG1, s_class_direct_precedence_list);
+ return scm_slot_ref (obj, Intern ("cpl"));
+}
+
+SCM_PROC (s_class_slots, "class-slots", 1, 0, 0, scm_class_slots);
+
+SCM
+scm_class_slots (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj),
+ obj, SCM_ARG1, s_class_slots);
+ return scm_slot_ref (obj, Intern ("slots"));
+}
+
+SCM_PROC (s_class_environment, "class-environment", 1, 0, 0, scm_class_environment);
+
+SCM
+scm_class_environment (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj),
+ obj, SCM_ARG1, s_class_environment);
+ return scm_slot_ref(obj, Intern ("environment"));
+}
+
+
+SCM_PROC (s_generic_function_name, "generic-function-name", 1, 0, 0, scm_generic_function_name);
+
+SCM
+scm_generic_function_name (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && GENERICP (obj),
+ obj, SCM_ARG1, s_generic_function_name);
+ return scm_procedure_property (obj, scm_sym_name);
+}
+
+SCM_PROC (s_generic_function_methods, "generic-function-methods", 1, 0, 0, scm_generic_function_methods);
+
+SCM
+scm_generic_function_methods (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && GENERICP (obj),
+ obj, SCM_ARG1, s_generic_function_methods);
+ return scm_slot_ref (obj, Intern ("methods"));
+}
+
+
+SCM_PROC (s_method_generic_function, "method-generic-function", 1, 0, 0, scm_method_generic_function);
+
+SCM
+scm_method_generic_function (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && METHODP (obj),
+ obj, SCM_ARG1, s_method_generic_function);
+ return scm_slot_ref (obj, Intern ("generic-function"));
+}
+
+SCM_PROC (s_method_specializers, "method-specializers", 1, 0, 0, scm_method_specializers);
+
+SCM
+scm_method_specializers (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && METHODP (obj),
+ obj, SCM_ARG1, s_method_specializers);
+ return scm_slot_ref (obj, Intern ("specializers"));
+}
+
+SCM_PROC (s_method_procedure, "method-procedure", 1, 0, 0, scm_method_procedure);
+
+SCM
+scm_method_procedure (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && METHODP (obj),
+ obj, SCM_ARG1, s_method_procedure);
+ return scm_slot_ref (obj, Intern ("procedure"));
+}
+
+SCM_PROC (s_accessor_method_slot_definition, "accessor-method-slot-definition", 1, 0, 0, scm_accessor_method_slot_definition);
+
+SCM
+scm_accessor_method_slot_definition (SCM obj)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_ACCESSORP (obj),
+ obj, SCM_ARG1, s_method_procedure);
+ return scm_slot_ref (obj, Intern ("slot-definition"));
+}
+
+
+/******************************************************************************
+ *
+ * S l o t a c c e s s
+ *
+ ******************************************************************************/
+
+SCM_PROC (s_make_unbound, "make-unbound", 0, 0, 0, scm_make_unbound);
+
+static SCM
+scm_make_unbound ()
+{
+ return SCM_GOOPS_UNBOUND;
+}
+
+SCM_PROC (s_unbound_p, "unbound?", 1, 0, 0, scm_unbound_p);
+
+static SCM
+scm_unbound_p (SCM obj)
+{
+ return SCM_GOOPS_UNBOUNDP (obj) ? SCM_BOOL_T : SCM_BOOL_F;
+}
+
+SCM_PROC (s_assert_bound, "assert-bound", 2, 0, 0, scm_assert_bound);
+
+static SCM
+scm_assert_bound (SCM value, SCM obj)
+{
+ if (SCM_GOOPS_UNBOUNDP (value))
+ return CALL_GF1 ("slot-unbound", obj);
+ return value;
+}
+
+SCM_PROC (s_at_assert_bound_ref, "@assert-bound-ref", 2, 0, 0, scm_at_assert_bound_ref);
+
+static SCM
+scm_at_assert_bound_ref (SCM obj, SCM index)
+{
+ SCM value = SCM_SLOT (obj, SCM_INUM (index));
+ if (SCM_GOOPS_UNBOUNDP (value))
+ return CALL_GF1 ("slot-unbound", obj);
+ return value;
+}
+
+SCM_PROC (s_sys_fast_slot_ref, "%fast-slot-ref", 2, 0, 0, scm_sys_fast_slot_ref);
+
+SCM
+scm_sys_fast_slot_ref (SCM obj, SCM index)
+{
+ register long i;
+
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG1, s_sys_fast_slot_ref);
+ SCM_ASSERT (SCM_INUMP (index), index, SCM_ARG2, s_sys_fast_slot_ref);
+ i = SCM_INUM (index);
+ SCM_ASSERT (i >= 0 && i < SCM_NUMBER_OF_SLOTS (obj),
+ index, SCM_OUTOFRANGE, s_sys_fast_slot_ref);
+ return scm_at_assert_bound_ref (obj, index);
+}
+
+SCM_PROC (s_sys_fast_slot_set_x, "%fast-slot-set!", 3, 0, 0, scm_sys_fast_slot_set_x);
+
+SCM
+scm_sys_fast_slot_set_x (SCM obj, SCM index, SCM value)
+{
+ register long i;
+
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG1, s_sys_fast_slot_set_x);
+ SCM_ASSERT (SCM_INUMP (index), index, SCM_ARG2, s_sys_fast_slot_set_x);
+ i = SCM_INUM (index);
+ SCM_ASSERT (i >= 0 && i < SCM_NUMBER_OF_SLOTS (obj),
+ index, SCM_OUTOFRANGE, s_sys_fast_slot_set_x);
+
+ SCM_SLOT (obj, i) = value;
+ return SCM_UNSPECIFIED;
+}
+
+/** Utilities **/
+
+/* In the future, this function will return the effective slot
+ * definition associated with SLOT_NAME. Now it just returns some of
+ * the information which will be stored in the effective slot
+ * definition.
+ */
+
+static SCM
+slot_definition_using_name (SCM class, SCM slot_name)
+{
+ register SCM slots = SCM_SLOT (class, scm_si_getters_n_setters);
+ for (; SCM_NIMP (slots); slots = SCM_CDR (slots))
+ if (SCM_CAAR (slots) == slot_name)
+ return SCM_CAR (slots);
+ return SCM_BOOL_F;
+}
+
+static SCM
+get_slot_value (SCM class, SCM obj, SCM slotdef)
+{
+ SCM access = SCM_CDDR (slotdef);
+ /* Two cases here:
+ * - access is an integer (the offset of this slot in the slots vector)
+ * - otherwise (car access) is the getter function to apply
+ */
+ if (SCM_INUMP (access))
+ return SCM_SLOT (obj, SCM_INUM (access));
+ else
+ {
+ /* We must evaluate (apply (car access) (list obj))
+ * where (car access) is known to be a closure of arity 1 */
+ register SCM code, env;
+
+ code = SCM_CAR (access);
+ if (!SCM_CLOSUREP (code))
+ return SCM_SUBRF (code) (obj);
+ env = SCM_EXTEND_ENV (SCM_CAR (SCM_CODE (code)),
+ SCM_LIST1 (obj),
+ SCM_ENV (code));
+ /* Evaluate the closure body */
+ return scm_eval_body (SCM_CDR (SCM_CODE (code)), env);
+ }
+}
+
+static SCM
+get_slot_value_using_name (SCM class, SCM obj, SCM slot_name)
+{
+ SCM slotdef = slot_definition_using_name (class, slot_name);
+ if (SCM_NFALSEP (slotdef))
+ return get_slot_value (class, obj, slotdef);
+ else
+ return CALL_GF3 ("slot-missing", class, obj, slot_name);
+}
+
+static SCM
+set_slot_value (SCM class, SCM obj, SCM slotdef, SCM value)
+{
+ SCM access = SCM_CDDR (slotdef);
+ /* Two cases here:
+ * - access is an integer (the offset of this slot in the slots vector)
+ * - otherwise (cadr access) is the setter function to apply
+ */
+ if (SCM_INUMP (access))
+ SCM_SLOT (obj, SCM_INUM (access)) = value;
+ else
+ {
+ /* We must evaluate (apply (cadr l) (list obj value))
+ * where (cadr l) is known to be a closure of arity 2 */
+ register SCM code, env;
+
+ code = SCM_CADR (access);
+ if (!SCM_CLOSUREP (code))
+ SCM_SUBRF (code) (obj, value);
+ else
+ {
+ env = SCM_EXTEND_ENV (SCM_CAR (SCM_CODE (code)),
+ SCM_LIST2 (obj, value),
+ SCM_ENV (code));
+ /* Evaluate the closure body */
+ scm_eval_body (SCM_CDR (SCM_CODE (code)), env);
+ }
+ }
+ return SCM_UNSPECIFIED;
+}
+
+static SCM
+set_slot_value_using_name (SCM class, SCM obj, SCM slot_name, SCM value)
+{
+ SCM slotdef = slot_definition_using_name (class, slot_name);
+ if (SCM_NFALSEP (slotdef))
+ return set_slot_value (class, obj, slotdef, value);
+ else
+ return CALL_GF4 ("slot-missing", class, obj, slot_name, value);
+}
+
+static SCM
+test_slot_existence (SCM class, SCM obj, SCM slot_name)
+{
+ register SCM l;
+
+ for (l = SCM_ACCESSORS_OF (obj); SCM_NNULLP (l); l = SCM_CDR (l))
+ if (SCM_CAAR (l) == slot_name)
+ return SCM_BOOL_T;
+
+ return SCM_BOOL_F;
+}
+
+/* The current libguile logand doesn't handle bignums.
+ * This (primitive) version handles them up to 32 bits.
+ */
+
+SCM_PROC1 (s_sys_logand, "%logand", scm_tc7_asubr, scm_sys_logand);
+
+static unsigned long
+scm_sloppy_num2ulong (SCM num, char *pos, const char *s_caller)
+{
+ unsigned long res;
+
+ if (SCM_INUMP (num))
+ {
+ if (SCM_INUM (num) < 0)
+ goto out_of_range;
+ res = SCM_INUM (num);
+ return res;
+ }
+ SCM_ASRTGO (SCM_NIMP (num), wrong_type_arg);
+ if (SCM_BIGP (num))
+ {
+ scm_sizet l;
+
+ res = 0;
+ for (l = SCM_NUMDIGS (num); l--;)
+ res = SCM_BIGUP (res) + SCM_BDIGITS (num)[l];
+ return res;
+ }
+ wrong_type_arg:
+ scm_wrong_type_arg (s_caller, (int) pos, num);
+ out_of_range:
+ scm_out_of_range (s_caller, num);
+}
+
+static SCM
+scm_sys_logand (SCM n1, SCM n2)
+{
+ if (SCM_UNBNDP (n2))
+ {
+ if (SCM_UNBNDP (n1))
+ return SCM_MAKINUM (-1);
+ return n1;
+ }
+ {
+ unsigned long u1 = scm_sloppy_num2ulong (n1, (char *) 1, s_sys_logand);
+ unsigned long u2 = scm_sloppy_num2ulong (n2, (char *) 2, s_sys_logand);
+ return scm_ulong2num (u1 & u2);
+ }
+}
+
+ /* ======================================== */
+
+SCM_PROC (s_slot_ref_using_class, "slot-ref-using-class", 3, 0, 0, scm_slot_ref_using_class);
+
+SCM
+scm_slot_ref_using_class (SCM class, SCM obj, SCM slot_name)
+{
+ SCM res;
+
+ SCM_ASSERT (SCM_NIMP (class) && CLASSP (class),
+ class, SCM_ARG1, s_slot_ref_using_class);
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG1, s_slot_ref_using_class);
+ SCM_ASSERT (SCM_NIMP (slot_name) && SCM_SYMBOLP (slot_name),
+ obj, SCM_ARG3, s_slot_ref_using_class);
+
+ res = get_slot_value_using_name (class, obj, slot_name);
+ if (SCM_GOOPS_UNBOUNDP (res))
+ return CALL_GF3 ("slot-unbound", class, obj, slot_name);
+ return res;
+}
+
+SCM_PROC (s_slot_set_using_class_x, "slot-set-using-class!", 4, 0, 0, scm_slot_set_using_class_x);
+
+SCM
+scm_slot_set_using_class_x (SCM class, SCM obj, SCM slot_name, SCM value)
+{
+ SCM_ASSERT (SCM_NIMP (class) && CLASSP (class),
+ class, SCM_ARG1, s_slot_set_using_class_x);
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG2, s_slot_set_using_class_x);
+ SCM_ASSERT (SCM_NIMP (slot_name) && SCM_SYMBOLP (slot_name),
+ obj, SCM_ARG3, s_slot_set_using_class_x);
+ return set_slot_value_using_name (class, obj, slot_name, value);
+}
+
+SCM_PROC (s_slot_bound_using_class_p, "slot-bound-using-class?", 3, 0, 0, scm_slot_bound_using_class_p);
+
+SCM
+scm_slot_bound_using_class_p (SCM class, SCM obj, SCM slot_name)
+{
+ SCM_ASSERT (SCM_NIMP (class) && CLASSP (class),
+ class, SCM_ARG1, s_slot_bound_using_class_p);
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG2, s_slot_bound_using_class_p);
+ SCM_ASSERT (SCM_NIMP (slot_name) && SCM_SYMBOLP (slot_name),
+ obj, SCM_ARG3, s_slot_bound_using_class_p);
+
+ return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class, obj, slot_name))
+ ? SCM_BOOL_F
+ : SCM_BOOL_T);
+}
+
+SCM_PROC (s_slot_exists_using_class_p, "slot-exists-using-class?", 3, 0, 0, scm_slot_exists_using_class_p);
+
+SCM
+scm_slot_exists_using_class_p (SCM class, SCM obj, SCM slot_name)
+{
+ SCM_ASSERT (SCM_NIMP (class) && CLASSP (class),
+ class, SCM_ARG1, s_slot_exists_using_class_p);
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG2, s_slot_exists_using_class_p);
+ SCM_ASSERT (SCM_NIMP (slot_name) && SCM_SYMBOLP (slot_name),
+ obj, SCM_ARG3, s_slot_exists_using_class_p);
+ return test_slot_existence (class, obj, slot_name);
+}
+
+
+ /* ======================================== */
+
+SCM_PROC (s_slot_ref, "slot-ref", 2, 0, 0, scm_slot_ref);
+
+SCM
+scm_slot_ref (SCM obj, SCM slot_name)
+{
+ SCM res, class;
+
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG1, s_slot_ref);
+ TEST_CHANGE_CLASS (obj, class);
+
+ res = get_slot_value_using_name (class, obj, slot_name);
+ if (SCM_GOOPS_UNBOUNDP (res))
+ return CALL_GF3 ("slot-unbound", class, obj, slot_name);
+ return res;
+}
+
+SCM_PROC (s_slot_set_x, "slot-set!", 3, 0, 0, scm_slot_set_x);
+
+const char *scm_s_slot_set_x = s_slot_set_x;
+
+SCM
+scm_slot_set_x (SCM obj, SCM slot_name, SCM value)
+{
+ SCM class;
+
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG1, s_slot_set_x);
+ TEST_CHANGE_CLASS(obj, class);
+
+ return set_slot_value_using_name (class, obj, slot_name, value);
+}
+
+SCM_PROC (s_slot_bound_p, "slot-bound?", 2, 0, 0, scm_slot_bound_p);
+
+SCM
+scm_slot_bound_p (SCM obj, SCM slot_name)
+{
+ SCM class;
+
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG1, s_slot_bound_p);
+ TEST_CHANGE_CLASS(obj, class);
+
+ return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class,
+ obj,
+ slot_name))
+ ? SCM_BOOL_F
+ : SCM_BOOL_T);
+}
+
+SCM_PROC (s_slot_exists_p, "slot-exists?", 2, 0, 0, scm_slots_exists_p);
+
+SCM
+scm_slots_exists_p (SCM obj, SCM slot_name)
+{
+ SCM class;
+
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj),
+ obj, SCM_ARG1, s_slot_exists_p);
+ SCM_ASSERT (SCM_NIMP (slot_name) && SCM_SYMBOLP (slot_name),
+ slot_name, SCM_ARG2, s_slot_exists_p);
+ TEST_CHANGE_CLASS (obj, class);
+
+ return test_slot_existence (class, obj, slot_name);
+}
+
+
+/******************************************************************************
+ *
+ * %allocate-instance (the low level instance allocation primitive)
+ *
+ ******************************************************************************/
+
+static void clear_method_cache (SCM);
+
+static SCM
+wrap_init (SCM class, SCM *m, int n)
+{
+ SCM z;
+ int i;
+
+ /* Set all slots to unbound */
+ for (i = 0; i < n; i++)
+ m[i] = SCM_GOOPS_UNBOUND;
+
+ SCM_NEWCELL2 (z);
+ SCM_SETCDR (z, (SCM) m);
+ SCM_SET_STRUCT_GC_CHAIN (z, 0);
+ SCM_SETCAR (z, (scm_bits_t) SCM_STRUCT_DATA (class) | scm_tc3_cons_gloc);
+
+ return z;
+}
+
+SCM_PROC (s_sys_allocate_instance, "%allocate-instance", 2, 0, 0, scm_sys_allocate_instance);
+
+SCM
+scm_sys_allocate_instance (SCM class, SCM initargs)
+{
+ SCM *m;
+ int n;
+
+ SCM_ASSERT (SCM_NIMP (class) && CLASSP (class),
+ class, SCM_ARG1, s_sys_allocate_instance);
+
+ /* Most instances */
+ if (SCM_CLASS_FLAGS (class) & SCM_STRUCTF_LIGHT)
+ {
+ n = SCM_INUM (SCM_SLOT (class, scm_si_nfields));
+ m = (SCM *) scm_must_malloc (n * sizeof (SCM), "instance");
+ return wrap_init (class, m, n);
+ }
+
+ /* Foreign objects */
+ if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_FOREIGN)
+ return scm_make_foreign_object (class, initargs);
+
+ n = SCM_INUM (SCM_SLOT (class, scm_si_nfields));
+
+ /* Entities */
+ if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_ENTITY)
+ {
+ m = (SCM *) scm_alloc_struct (n,
+ scm_struct_entity_n_extra_words,
+ "entity");
+ m[scm_struct_i_setter] = SCM_BOOL_F;
+ m[scm_struct_i_procedure] = SCM_BOOL_F;
+ /* Generic functions */
+ if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_PURE_GENERIC)
+ {
+ SCM gf = wrap_init (class, m, n);
+ clear_method_cache (gf);
+ return gf;
+ }
+ else
+ return wrap_init (class, m, n);
+ }
+
+ /* Class objects */
+ if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_METACLASS)
+ {
+ int i;
+
+ /* allocate class object */
+ SCM z = scm_make_struct (class, SCM_INUM0, SCM_EOL);
+
+ SCM_SLOT (z, scm_si_print) = SCM_GOOPS_UNBOUND;
+ for (i = scm_si_goops_fields; i < n; i++)
+ SCM_SLOT (z, i) = SCM_GOOPS_UNBOUND;
+
+ if (SCM_SUBCLASSP (class, scm_class_entity_class))
+ SCM_SET_CLASS_FLAGS (z, SCM_CLASSF_OPERATOR | SCM_CLASSF_ENTITY);
+ else if (SCM_SUBCLASSP (class, scm_class_operator_class))
+ SCM_SET_CLASS_FLAGS (z, SCM_CLASSF_OPERATOR);
+
+ return z;
+ }
+
+ /* Non-light instances */
+ {
+ m = (SCM *) scm_alloc_struct (n,
+ scm_struct_n_extra_words,
+ "heavy instance");
+ return wrap_init (class, m, n);
+ }
+}
+
+SCM_PROC (s_sys_set_object_setter_x, "%set-object-setter!", 2, 0, 0, scm_sys_set_object_setter_x);
+
+SCM
+scm_sys_set_object_setter_x (SCM obj, SCM setter)
+{
+ SCM_ASSERT (SCM_NIMP (obj) && SCM_STRUCTP (obj)
+ && ((SCM_CLASS_FLAGS (obj) & SCM_CLASSF_OPERATOR)
+ || SCM_I_ENTITYP (obj)),
+ obj,
+ SCM_ARG1,
+ s_sys_set_object_setter_x);
+ if (SCM_I_ENTITYP (obj))
+ SCM_ENTITY_SETTER (obj) = setter;
+ else
+ SCM_OPERATOR_CLASS (obj)->setter = setter;
+ return SCM_UNSPECIFIED;
+}
+
+/******************************************************************************
+ *
+ * %modify-instance (used by change-class to modify in place)
+ *
+ ******************************************************************************/
+
+SCM_PROC (s_sys_modify_instance, "%modify-instance", 2, 0, 0, scm_sys_modify_instance);
+
+SCM
+scm_sys_modify_instance (SCM old, SCM new)
+{
+ SCM_ASSERT (SCM_NIMP (old) && SCM_INSTANCEP (old),
+ old, SCM_ARG1, s_sys_modify_instance);
+ SCM_ASSERT (SCM_NIMP (new) && SCM_INSTANCEP (new),
+ new, SCM_ARG2, s_sys_modify_instance);
+
+ /* Exchange the data contained in old and new. We exchange rather than
+ * scratch the old value with new to be correct with GC.
+ * See "Class redefinition protocol above".
+ */
+ SCM_REDEFER_INTS;
+ {
+ SCM car = SCM_CAR (old);
+ SCM cdr = SCM_CDR (old);
+ SCM_SETCAR (old, SCM_CAR (new));
+ SCM_SETCDR (old, SCM_CDR (new));
+ SCM_SETCAR (new, car);
+ SCM_SETCDR (new, cdr);
+ }
+ SCM_REALLOW_INTS;
+ return SCM_UNSPECIFIED;
+}
+
+SCM_PROC (s_sys_modify_class, "%modify-class", 2, 0, 0, scm_sys_modify_class);
+
+SCM
+scm_sys_modify_class (SCM old, SCM new)
+{
+ SCM_ASSERT (SCM_NIMP (old) && CLASSP (old),
+ old, SCM_ARG1, s_sys_modify_class);
+ SCM_ASSERT (SCM_NIMP (new) && CLASSP (new),
+ new, SCM_ARG2, s_sys_modify_class);
+
+ SCM_REDEFER_INTS;
+ {
+ SCM car = SCM_CAR (old);
+ SCM cdr = SCM_CDR (old);
+ SCM_SETCAR (old, SCM_CAR (new));
+ SCM_SETCDR (old, SCM_CDR (new));
+ SCM_STRUCT_DATA (old)[scm_vtable_index_vtable] = old;
+ SCM_SETCAR (new, car);
+ SCM_SETCDR (new, cdr);
+ SCM_STRUCT_DATA (new)[scm_vtable_index_vtable] = new;
+ }
+ SCM_REALLOW_INTS;
+ return SCM_UNSPECIFIED;
+}
+
+SCM_PROC (s_sys_invalidate_class, "%invalidate-class", 1, 0, 0, scm_sys_invalidate_class);
+
+SCM
+scm_sys_invalidate_class (SCM class)
+{
+ SCM_ASSERT (SCM_NIMP (class) && CLASSP (class),
+ class, SCM_ARG1, s_sys_invalidate_class);
+
+ SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID);
+ return SCM_UNSPECIFIED;
+}
+
+/* When instances change class, they finally get a new body, but
+ * before that, they go through purgatory in hell. Odd as it may
+ * seem, this data structure saves us from eternal suffering in
+ * infinite recursions.
+ */
+
+static SCM **hell;
+static int n_hell = 1; /* one place for the evil one himself */
+static int hell_size = 4;
+#ifdef USE_THREADS
+static scm_mutex_t hell_mutex;
+#endif
+
+static int
+burnin (SCM o)
+{
+ int i;
+ for (i = 1; i < n_hell; ++i)
+ if (SCM_INST (o) == hell[i])
+ return i;
+ return 0;
+}
+
+static void
+go_to_hell (void *o)
+{
+ SCM obj = (SCM) o;
+#ifdef USE_THREADS
+ scm_mutex_lock (&hell_mutex);
+#endif
+ if (n_hell == hell_size)
+ {
+ int new_size = 2 * hell_size;
+ hell = scm_must_realloc (hell, hell_size, new_size, "hell");
+ hell_size = new_size;
+ }
+ hell[n_hell++] = SCM_INST (obj);
+#ifdef USE_THREADS
+ scm_mutex_unlock (&hell_mutex);
+#endif
+}
+
+static void
+go_to_heaven (void *o)
+{
+#ifdef USE_THREADS
+ scm_mutex_lock (&hell_mutex);
+#endif
+ hell[burnin ((SCM) o)] = hell[--n_hell];
+#ifdef USE_THREADS
+ scm_mutex_unlock (&hell_mutex);
+#endif
+}
+
+static SCM
+purgatory (void *args)
+{
+ return scm_apply (GETVAR (Intern ("change-class")), (SCM) args, SCM_EOL);
+}
+
+void
+scm_change_object_class (SCM obj, SCM old_class, SCM new_class)
+{
+ if (!burnin (obj))
+ scm_internal_dynamic_wind (go_to_hell, purgatory, go_to_heaven,
+ (void *) SCM_LIST2 (obj, new_class),
+ (void *) obj);
+}
+
+/******************************************************************************
+ *
+ * GGGG FFFFF
+ * G F
+ * G GG FFF
+ * G G F
+ * GGG E N E R I C F U N C T I O N S
+ *
+ * This implementation provides
+ * - generic functions (with class specializers)
+ * - multi-methods
+ * - next-method
+ * - a hard-coded MOP for standard gf, which can be overloaded for non-std gf
+ *
+ ******************************************************************************/
+
+SCM_KEYWORD (k_name, "name");
+
+SCM_SYMBOL (sym_no_method, "no-method");
+
+static SCM list_of_no_method;
+
+SCM_SYMBOL (scm_sym_args, "args");
+
+SCM
+scm_make_method_cache (SCM gf)
+{
+ return SCM_LIST5 (SCM_IM_DISPATCH, scm_sym_args, SCM_MAKINUM (1),
+ scm_make_vector (SCM_MAKINUM (SCM_INITIAL_MCACHE_SIZE),
+ list_of_no_method),
+ gf);
+}
+
+static void
+clear_method_cache (SCM gf)
+{
+ SCM_ENTITY_PROCEDURE (gf) = scm_make_method_cache (gf);
+ SCM_SLOT (gf, scm_si_used_by) = SCM_BOOL_F;
+}
+
+SCM_PROC (s_sys_invalidate_method_cache_x, "%invalidate-method-cache!", 1, 0, 0, scm_sys_invalidate_method_cache_x);
+
+SCM
+scm_sys_invalidate_method_cache_x (SCM gf)
+{
+ SCM used_by;
+ SCM_ASSERT (SCM_NIMP (gf) && SCM_STRUCTP (gf) && SCM_PUREGENERICP (gf),
+ gf, SCM_ARG1, s_sys_invalidate_method_cache_x);
+ used_by = SCM_SLOT (gf, scm_si_used_by);
+ if (SCM_NFALSEP (used_by))
+ {
+ SCM methods = SCM_SLOT (gf, scm_si_methods);
+ for (; SCM_NIMP (used_by) && SCM_CONSP (used_by);
+ used_by = SCM_CDR (used_by))
+ scm_sys_invalidate_method_cache_x (SCM_CAR (used_by));
+ clear_method_cache (gf);
+ for (; SCM_NIMP (methods) && SCM_CONSP (methods);
+ methods = SCM_CDR (methods))
+ SCM_SLOT (SCM_CAR (methods), scm_si_code_table) = SCM_EOL;
+ }
+ {
+ int n = SCM_INUM (SCM_SLOT (gf, scm_si_n_specialized));
+ /* The sign of n is a flag indicating rest args. */
+ SCM_SET_MCACHE_N_SPECIALIZED (SCM_ENTITY_PROCEDURE (gf),
+ SCM_MAKINUM (n >= 0 ? n : -n));
+ }
+ return SCM_UNSPECIFIED;
+}
+
+SCM_PROC (s_generic_capability_p, "generic-capability?", 1, 0, 0, scm_generic_capability_p);
+
+SCM
+scm_generic_capability_p (SCM proc)
+{
+ SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (proc)),
+ proc, SCM_ARG1, s_generic_capability_p);
+ return (scm_subr_p (proc) && SCM_SUBR_GENERIC (proc)
+ ? SCM_BOOL_T
+ : SCM_BOOL_F);
+}
+
+SCM_PROC (s_enable_primitive_generic_x, "enable-primitive-generic!", 0, 0, 1, scm_enable_primitive_generic_x);
+
+SCM
+scm_enable_primitive_generic_x (SCM subrs)
+{
+ while (SCM_NIMP (subrs))
+ {
+ SCM subr = SCM_CAR (subrs);
+ SCM_ASSERT (scm_subr_p (subr) && SCM_SUBR_GENERIC (subr),
+ subr, SCM_ARGn, s_enable_primitive_generic_x);
+ *SCM_SUBR_GENERIC (subr)
+ = scm_make (SCM_LIST3 (scm_class_generic,
+ k_name,
+ SCM_SNAME (subr)));
+ subrs = SCM_CDR (subrs);
+ }
+ return SCM_UNSPECIFIED;
+}
+
+SCM_PROC (s_primitive_generic_generic, "primitive-generic-generic", 1, 0, 0, scm_primitive_generic_generic);
+
+SCM
+scm_primitive_generic_generic (SCM subr)
+{
+ if (scm_subr_p (subr) && SCM_SUBR_GENERIC (subr))
+ {
+ SCM gf = *SCM_SUBR_GENERIC (subr);
+ if (gf)
+ return gf;
+ }
+ return scm_wta (subr, (char *) SCM_ARG1, s_primitive_generic_generic);
+}
+
+/******************************************************************************
+ *
+ * Protocol for calling a generic fumction
+ * This protocol is roughly equivalent to (parameter are a little bit different
+ * for efficiency reasons):
+ *
+ * + apply-generic (gf args)
+ * + compute-applicable-methods (gf args ...)
+ * + sort-applicable-methods (methods args)
+ * + apply-methods (gf methods args)
+ *
+ * apply-methods calls make-next-method to build the "continuation" of a a
+ * method. Applying a next-method will call apply-next-method which in
+ * turn will call apply again to call effectively the following method.
+ *
+ ******************************************************************************/
+
+static int
+applicablep (SCM actual, SCM formal)
+{
+ register SCM ptr;
+
+ /* We test that (memq formal (slot-ref actual 'cpl))
+ * However, we don't call memq here since we already know that
+ * the list is well formed
+ */
+ for (ptr=SCM_SLOT(actual, scm_si_cpl); SCM_NNULLP(ptr); ptr = SCM_CDR(ptr)) {
+ if (SCM_NIMP (ptr) && SCM_CONSP (ptr)) {
+ if (SCM_CAR (ptr) == formal)
+ return 1;
+ }
+ else
+ scm_misc_error (0,
+ "Internal error in applicable: bad list ~S",
+ SCM_LIST1 (actual));
+ }
+ return 0;
+}
+
+static int
+more_specificp (SCM m1, SCM m2, SCM *targs)
+{
+ register SCM s1, s2;
+ register int i;
+ /*
+ * Note:
+ * m1 and m2 can have != length (i.e. one can be one element longer than the
+ * other when we have a dotted parameter list). For instance, with the call
+ * (M 1)
+ * with
+ * (define-method M (a . l) ....)
+ * (define-method M (a) ....)
+ *
+ * we consider that the second method is more specific.
+ *
+ * BTW, targs is an array of types. We don't need it's size since
+ * we already know that m1 and m2 are applicable (no risk to go past
+ * the end of this array).
+ *
+ */
+ for (i=0,s1=SPEC_OF(m1),s2=SPEC_OF(m2); ; i++,s1=SCM_CDR(s1),s2=SCM_CDR(s2)) {
+ if (SCM_NULLP(s1)) return 1;
+ if (SCM_NULLP(s2)) return 0;
+ if (SCM_CAR(s1) != SCM_CAR(s2)) {
+ register SCM l, cs1 = SCM_CAR(s1), cs2 = SCM_CAR(s2);
+
+ for (l = SCM_SLOT(targs[i], scm_si_cpl); ; l = SCM_CDR(l)) {
+ if (cs1 == SCM_CAR(l))
+ return 1;
+ if (cs2 == SCM_CAR(l))
+ return 0;
+ }
+ return 0;/* should not occur! */
+ }
+ }
+ return 0; /* should not occur! */
+}
+
+#define BUFFSIZE 32 /* big enough for most uses */
+
+static SCM
+scm_i_vector2list (SCM l, int len)
+{
+ int j;
+ SCM z = scm_make_vector (SCM_MAKINUM (len), SCM_UNDEFINED);
+
+ for (j = 0; j < len; j++, l = SCM_CDR (l)) {
+ SCM_VELTS (z)[j] = SCM_CAR (l);
+ }
+ return z;
+}
+
+static SCM
+sort_applicable_methods (SCM method_list, int size, SCM *targs)
+{
+ int i, j, incr;
+ SCM *v, vector = SCM_EOL;
+ SCM buffer[BUFFSIZE];
+ SCM save = method_list;
+
+ /* For reasonably sized method_lists we can try to avoid all the
+ * consing and reorder the list in place...
+ * This idea is due to David McClain <Dave_McClain@msn.com>
+ */
+ if (size <= BUFFSIZE)
+ {
+ for (i = 0; i < size; i++)
+ {
+ buffer[i] = SCM_CAR (method_list);
+ method_list = SCM_CDR (method_list);
+ }
+ v = buffer;
+ }
+ else
+ {
+ /* Too many elements in method_list to keep everything locally */
+ vector = scm_i_vector2list (save, size);
+ v = SCM_VELTS (vector);
+ }
+
+ /* Use a simple shell sort since it is generally faster than qsort on
+ * small vectors (which is probably mostly the case when we have to
+ * sort a list of applicable methods).
+ */
+ for (incr = size / 2; incr; incr /= 2)
+ {
+ for (i = incr; i < size; i++)
+ {
+ for (j = i - incr; j >= 0; j -= incr)
+ {
+ if (more_specificp (v[j], v[j+incr], targs))
+ break;
+ else
+ {
+ SCM tmp = v[j + incr];
+ v[j + incr] = v[j];
+ v[j] = tmp;
+ }
+ }
+ }
+ }
+
+ if (size <= BUFFSIZE)
+ {
+ /* We did it in locally, so restore the original list (reordered) in-place */
+ for (i = 0, method_list = save; i < size; i++, v++)
+ {
+ SCM_SETCAR (method_list, *v);
+ method_list = SCM_CDR (method_list);
+ }
+ return save;
+ }
+ /* If we are here, that's that we did it the hard way... */
+ return scm_vector_to_list (vector);
+}
+
+SCM
+scm_compute_applicable_methods (SCM gf, SCM args, int len, int find_method_p)
+{
+ register int i;
+ int count = 0;
+ SCM l, fl, applicable = SCM_EOL;
+ SCM save = args;
+ SCM buffer[BUFFSIZE], *types, *p;
+ SCM tmp;
+
+ /* Build the list of arguments types */
+ if (len >= BUFFSIZE) {
+ tmp = scm_make_vector (SCM_MAKINUM (len), SCM_UNDEFINED);
+ /* NOTE: Using pointers to malloced memory won't work if we
+ 1. have preemtive threading, and,
+ 2. have a GC which moves objects. */
+ types = p = SCM_VELTS(tmp);
+ }
+ else
+ types = p = buffer;
+
+ for ( ; SCM_NNULLP (args); args = SCM_CDR (args))
+ *p++ = scm_class_of (SCM_CAR (args));
+
+ /* Build a list of all applicable methods */
+ for (l = SCM_SLOT (gf, scm_si_methods); SCM_NNULLP (l); l = SCM_CDR (l))
+ {
+ fl = SPEC_OF (SCM_CAR (l));
+ /* Only accept accessors which match exactly in first arg. */
+ if (SCM_ACCESSORP (SCM_CAR (l))
+ && (SCM_IMP (fl) || types[0] != SCM_CAR (fl)))
+ continue;
+ for (i = 0; ; i++, fl = SCM_CDR (fl))
+ {
+ if ((SCM_NIMP (fl) && SCM_INSTANCEP (fl))
+ /* We have a dotted argument list */
+ || (i >= len && SCM_NULLP (fl)))
+ { /* both list exhausted */
+ applicable = scm_cons (SCM_CAR (l), applicable);
+ count += 1;
+ break;
+ }
+ if (i >= len
+ || SCM_NULLP (fl)
+ || !applicablep (types[i], SCM_CAR (fl)))
+ break;
+ }
+ }
+
+ if (count == 0)
+ {
+ if (find_method_p)
+ return SCM_BOOL_F;
+ CALL_GF2 ("no-applicable-method", gf, save);
+ /* if we are here, it's because no-applicable-method hasn't signaled an error */
+ return SCM_BOOL_F;
+ }
+ return (count == 1
+ ? applicable
+ : sort_applicable_methods (applicable, count, types));
+}
+
+#if 0
+SCM_PROC (s_sys_compute_applicable_methods, "%compute-applicable-methods", 2, 0, 0, scm_sys_compute_applicable_methods);
+#endif
+
+static const char s_sys_compute_applicable_methods[] = "%compute-applicable-methods";
+
+SCM
+scm_sys_compute_applicable_methods (SCM gf, SCM args)
+{
+ int n;
+ SCM_ASSERT (SCM_NIMP (gf) && GENERICP (gf),
+ gf, SCM_ARG1, s_sys_compute_applicable_methods);
+ n = scm_ilength (args);
+ SCM_ASSERT (n >= 0, args, SCM_ARG2, s_sys_compute_applicable_methods);
+ return scm_compute_applicable_methods (gf, args, n, 1);
+}
+
+SCM_VCELL_INIT (var_compute_applicable_methods, "compute-applicable-methods", scm_make_gsubr (s_sys_compute_applicable_methods, 2, 0, 0, scm_sys_compute_applicable_methods));
+
+SCM_SYNTAX (s_atslot_ref, "@slot-ref", scm_makmmacro, scm_m_atslot_ref);
+
+SCM
+scm_m_atslot_ref (SCM xorig, SCM env)
+{
+ SCM x = SCM_CDR (xorig);
+ SCM_ASSYNT (scm_ilength (x) == 2, xorig, scm_s_expression, s_atslot_ref);
+ SCM_ASSYNT (SCM_INUMP (SCM_CADR (x)), SCM_CADR (x), SCM_ARG2, s_atslot_ref);
+ return scm_cons (SCM_IM_SLOT_REF, x);
+}
+
+SCM_SYNTAX (s_atslot_set_x, "@slot-set!", scm_makmmacro, scm_m_atslot_set_x);
+
+SCM
+scm_m_atslot_set_x (SCM xorig, SCM env)
+{
+ SCM x = SCM_CDR (xorig);
+ SCM_ASSYNT (scm_ilength (x) == 3, xorig, scm_s_expression, s_atslot_set_x);
+ SCM_ASSYNT (SCM_INUMP (SCM_CADR (x)), SCM_CADR (x), SCM_ARG2, s_atslot_set_x);
+ return scm_cons (SCM_IM_SLOT_SET_X, x);
+}
+
+SCM_SYNTAX (s_atdispatch, "@dispatch", scm_makmmacro, scm_m_atdispatch);
+
+SCM_SYMBOL (sym_atdispatch, s_atdispatch);
+
+SCM
+scm_m_atdispatch (SCM xorig, SCM env)
+{
+ SCM args, n, v, gf, x = SCM_CDR (xorig);
+ SCM_ASSYNT (scm_ilength (x) == 4, xorig, scm_s_expression, s_atdispatch);
+ args = SCM_CAR (x);
+ SCM_ASSYNT (SCM_NIMP (args) && (SCM_CONSP (args) || SCM_SYMBOLP (args)),
+ args, SCM_ARG1, s_atdispatch);
+ x = SCM_CDR (x);
+ n = SCM_XEVALCAR (x, env);
+ SCM_ASSYNT (SCM_INUMP (n), n, SCM_ARG2, s_atdispatch);
+ SCM_ASSYNT (SCM_INUM (n) >= 1, n, SCM_OUTOFRANGE, s_atdispatch);
+ x = SCM_CDR (x);
+ v = SCM_XEVALCAR (x, env);
+ SCM_ASSYNT (SCM_NIMP (v) && SCM_VECTORP (v), v, SCM_ARG3, s_atdispatch);
+ x = SCM_CDR (x);
+ gf = SCM_XEVALCAR (x, env);
+ SCM_ASSYNT (SCM_NIMP (gf) && SCM_STRUCTP (gf) && SCM_PUREGENERICP (gf),
+ gf, SCM_ARG4, s_atdispatch);
+ return SCM_LIST5 (SCM_IM_DISPATCH, args, n, v, gf);
+}
+
+#ifdef USE_THREADS
+static void
+lock_cache_mutex (void *m)
+{
+ SCM mutex = (SCM) m;
+ scm_lock_mutex (mutex);
+}
+
+static void
+unlock_cache_mutex (void *m)
+{
+ SCM mutex = (SCM) m;
+ scm_unlock_mutex (mutex);
+}
+#endif
+
+static SCM
+call_memoize_method (void *a)
+{
+ SCM args = (SCM) a;
+ SCM gf = SCM_CAR (args);
+ SCM x = SCM_CADR (args);
+ /* First check if another thread has inserted a method between
+ * the cache miss and locking the mutex.
+ */
+ SCM cmethod = scm_mcache_lookup_cmethod (x, SCM_CDDR (args));
+ if (SCM_NIMP (cmethod))
+ return cmethod;
+ /*fixme* Use scm_apply */
+ return CALL_GF3 ("memoize-method!", gf, SCM_CDDR (args), x);
+}
+
+SCM
+scm_memoize_method (SCM x, SCM args)
+{
+ SCM gf = SCM_CAR (scm_last_pair (x));
+#ifdef USE_THREADS
+ return scm_internal_dynamic_wind (lock_cache_mutex,
+ call_memoize_method,
+ unlock_cache_mutex,
+ (void *) scm_cons2 (gf, x, args),
+ (void *) SCM_SLOT (gf, scm_si_cache_mutex));
+#else
+ return call_memoize_method ((void *) scm_cons2 (gf, x, args));
+#endif
+}
+
+/******************************************************************************
+ *
+ * A simple make (which will be redefined later in Scheme)
+ * This version handles only creation of gf, methods and classes (no instances)
+ *
+ * Since this code will disappear when Goops will be fully booted,
+ * no precaution is taken to be efficient.
+ *
+ ******************************************************************************/
+
+SCM_KEYWORD (k_setter, "setter");
+SCM_KEYWORD (k_specializers, "specializers");
+SCM_KEYWORD (k_procedure, "procedure");
+SCM_KEYWORD (k_dsupers, "dsupers");
+SCM_KEYWORD (k_slots, "slots");
+SCM_KEYWORD (k_gf, "generic-function");
+
+SCM_PROC (s_make, "make", 0, 0, 1, scm_make);
+
+SCM
+scm_make (SCM args)
+{
+ SCM class, z;
+ int len = scm_ilength (args);
+
+ if (len <= 0 || (len & 1) == 0)
+ scm_wrong_num_args (scm_makfrom0str (s_make));
+
+ class = SCM_CAR(args);
+ args = SCM_CDR(args);
+
+ if (class == scm_class_generic || class == scm_class_generic_with_setter)
+ {
+#ifdef USE_THREADS
+ z = scm_make_struct (class, SCM_INUM0,
+ SCM_LIST4 (SCM_EOL,
+ SCM_INUM0,
+ SCM_BOOL_F,
+ scm_make_mutex ()));
+#else
+ z = scm_make_struct (class, SCM_INUM0,
+ SCM_LIST3 (SCM_EOL, SCM_INUM0, SCM_BOOL_F));
+#endif
+ scm_set_procedure_property_x (z, scm_sym_name,
+ scm_get_keyword (k_name,
+ args,
+ SCM_BOOL_F));
+ clear_method_cache (z);
+ if (class == scm_class_generic_with_setter)
+ {
+ SCM setter = scm_get_keyword (k_setter, args, SCM_BOOL_F);
+ if (SCM_NIMP (setter))
+ scm_sys_set_object_setter_x (z, setter);
+ }
+ }
+ else
+ {
+ z = scm_sys_allocate_instance (class, args);
+
+ if (class == scm_class_method
+ || class == scm_class_simple_method
+ || class == scm_class_accessor)
+ {
+ SCM_SLOT (z, scm_si_generic_function) =
+ scm_i_get_keyword (k_gf,
+ args,
+ len - 1,
+ SCM_BOOL_F,
+ s_make);
+ SCM_SLOT (z, scm_si_specializers) =
+ scm_i_get_keyword (k_specializers,
+ args,
+ len - 1,
+ SCM_EOL,
+ s_make);
+ SCM_SLOT (z, scm_si_procedure) =
+ scm_i_get_keyword (k_procedure,
+ args,
+ len - 1,
+ SCM_EOL,
+ s_make);
+ SCM_SLOT (z, scm_si_code_table) = SCM_EOL;
+ }
+ else
+ {
+ /* In all the others case, make a new class .... No instance here */
+ SCM_SLOT (z, scm_si_name) =
+ scm_i_get_keyword (k_name,
+ args,
+ len - 1,
+ Intern ("???"),
+ s_make);
+ SCM_SLOT (z, scm_si_direct_supers) =
+ scm_i_get_keyword (k_dsupers,
+ args,
+ len - 1,
+ SCM_EOL,
+ s_make);
+ SCM_SLOT (z, scm_si_direct_slots) =
+ scm_i_get_keyword (k_slots,
+ args,
+ len - 1,
+ SCM_EOL,
+ s_make);
+ }
+ }
+ return z;
+}
+
+SCM_PROC (s_find_method, "find-method", 0, 0, 1, scm_find_method);
+
+SCM
+scm_find_method (SCM l)
+{
+ SCM gf;
+ int len = scm_ilength (l);
+
+ if (len == 0)
+ scm_wrong_num_args (scm_makfrom0str (s_find_method));
+
+ gf = SCM_CAR(l); l = SCM_CDR(l);
+ SCM_ASSERT (SCM_NIMP (gf) && GENERICP (gf), gf, SCM_ARG1, s_find_method);
+ if (SCM_NULLP (SCM_SLOT (gf, scm_si_methods)))
+ scm_misc_error (s_find_method,
+ "no methods for generic ~S",
+ SCM_LIST1 (gf));
+
+ return scm_compute_applicable_methods (gf, l, len - 1, 1);
+}
+
+SCM_PROC (s_sys_method_more_specific_p, "%method-more-specific?", 3, 0, 0, scm_sys_method_more_specific_p);
+
+SCM
+scm_sys_method_more_specific_p (SCM m1, SCM m2, SCM targs)
+{
+ SCM l, v;
+ int i, len;
+
+ SCM_ASSERT (SCM_NIMP (m1) && METHODP (m1),
+ m1, SCM_ARG1, s_sys_method_more_specific_p);
+ SCM_ASSERT (SCM_NIMP (m2) && METHODP (m2),
+ m2, SCM_ARG2, s_sys_method_more_specific_p);
+ SCM_ASSERT ((len = scm_ilength (targs)) != -1,
+ targs, SCM_ARG3, s_sys_method_more_specific_p);
+
+ /* Verify that all the arguments of targs are classes and place them in a vector*/
+ v = scm_make_vector (SCM_MAKINUM (len), SCM_EOL);
+
+ for (i=0, l=targs; SCM_NNULLP(l); i++, l=SCM_CDR(l)) {
+ SCM_ASSERT (SCM_NIMP (SCM_CAR (l)) && CLASSP (SCM_CAR (l)),
+ targs, SCM_ARG3, s_sys_method_more_specific_p);
+ SCM_VELTS(v)[i] = SCM_CAR(l);
+ }
+ return more_specificp (m1, m2, SCM_VELTS(v)) ? SCM_BOOL_T: SCM_BOOL_F;
+}
+
+
+
+/******************************************************************************
+ *
+ * Initializations
+ *
+ ******************************************************************************/
+
+
+static void
+make_stdcls (SCM *var, char *name, SCM meta, SCM super, SCM slots)
+{
+ SCM tmp = Intern(name);
+
+ *var = scm_permanent_object (scm_basic_make_class (meta,
+ tmp,
+ SCM_CONSP (super)
+ ? super
+ : SCM_LIST1 (super),
+ slots));
+ DEFVAR(tmp, *var);
+}
+
+
+SCM_KEYWORD (k_slot_definition, "slot-definition");
+
+static void
+create_standard_classes (void)
+{
+ SCM slots;
+ SCM method_slots = SCM_LIST4 (Intern ("generic-function"),
+ Intern ("specializers"),
+ Intern ("procedure"),
+ Intern ("code-table"));
+ SCM amethod_slots = SCM_LIST1 (SCM_LIST3 (Intern ("slot-definition"),
+ k_init_keyword,
+ k_slot_definition));
+#ifdef USE_THREADS
+ SCM mutex_slot = SCM_LIST1 (Intern ("make-mutex"));
+#else
+ SCM mutex_slot = SCM_BOOL_F;
+#endif
+ SCM gf_slots = SCM_LIST4 (Intern ("methods"),
+ SCM_LIST3 (Intern ("n-specialized"),
+ k_init_value,
+ SCM_INUM0),
+ SCM_LIST3 (Intern ("used-by"),
+ k_init_value,
+ SCM_BOOL_F),
+ SCM_LIST3 (Intern ("cache-mutex"),
+ k_init_thunk,
+ scm_closure (SCM_LIST2 (SCM_EOL,
+ mutex_slot),
+ SCM_EOL)));
+
+ /* Foreign class slot classes */
+ make_stdcls (&scm_class_foreign_slot, "<foreign-slot>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_protected, "<protected-slot>",
+ scm_class_class, scm_class_foreign_slot, SCM_EOL);
+ make_stdcls (&scm_class_opaque, "<opaque-slot>",
+ scm_class_class, scm_class_foreign_slot, SCM_EOL);
+ make_stdcls (&scm_class_read_only, "<read-only-slot>",
+ scm_class_class, scm_class_foreign_slot, SCM_EOL);
+ make_stdcls (&scm_class_self, "<self-slot>",
+ scm_class_class,
+ SCM_LIST2 (scm_class_foreign_slot, scm_class_read_only),
+ SCM_EOL);
+ make_stdcls (&scm_class_protected_opaque, "<protected-opaque-slot>",
+ scm_class_class,
+ SCM_LIST2 (scm_class_protected, scm_class_opaque),
+ SCM_EOL);
+ make_stdcls (&scm_class_protected_read_only, "<protected-read-only-slot>",
+ scm_class_class,
+ SCM_LIST2 (scm_class_protected, scm_class_read_only),
+ SCM_EOL);
+ make_stdcls (&scm_class_scm, "<scm-slot>",
+ scm_class_class, scm_class_protected, SCM_EOL);
+ make_stdcls (&scm_class_int, "<int-slot>",
+ scm_class_class, scm_class_foreign_slot, SCM_EOL);
+ make_stdcls (&scm_class_float, "<float-slot>",
+ scm_class_class, scm_class_foreign_slot, SCM_EOL);
+ make_stdcls (&scm_class_double, "<double-slot>",
+ scm_class_class, scm_class_foreign_slot, SCM_EOL);
+
+ /* Continue initialization of class <class> */
+
+ slots = build_class_class_slots ();
+ SCM_SLOT (scm_class_class, scm_si_direct_slots) = slots;
+ SCM_SLOT (scm_class_class, scm_si_slots) = slots;
+ SCM_SLOT (scm_class_class, scm_si_getters_n_setters)
+ = compute_getters_n_setters (slots);
+
+ make_stdcls (&scm_class_foreign_class, "<foreign-class>",
+ scm_class_class, scm_class_class,
+ SCM_LIST2 (SCM_LIST3 (Intern ("constructor"),
+ k_class,
+ scm_class_opaque),
+ SCM_LIST3 (Intern ("destructor"),
+ k_class,
+ scm_class_opaque)));
+ make_stdcls (&scm_class_foreign_object, "<foreign-object>",
+ scm_class_foreign_class, scm_class_object, SCM_EOL);
+ SCM_SET_CLASS_FLAGS (scm_class_foreign_object, SCM_CLASSF_FOREIGN);
+
+ /* scm_class_generic functions classes */
+ make_stdcls (&scm_class_procedure_class, "<procedure-class>",
+ scm_class_class, scm_class_class, SCM_EOL);
+ make_stdcls (&scm_class_entity_class, "<entity-class>",
+ scm_class_class, scm_class_procedure_class, SCM_EOL);
+ make_stdcls (&scm_class_operator_class, "<operator-class>",
+ scm_class_class, scm_class_procedure_class, SCM_EOL);
+ make_stdcls (&scm_class_operator_with_setter_class,
+ "<operator-with-setter-class>",
+ scm_class_class, scm_class_operator_class, SCM_EOL);
+ make_stdcls (&scm_class_method, "<method>",
+ scm_class_class, scm_class_object, method_slots);
+ make_stdcls (&scm_class_simple_method, "<simple-method>",
+ scm_class_class, scm_class_method, SCM_EOL);
+ SCM_SET_CLASS_FLAGS (scm_class_simple_method, SCM_CLASSF_SIMPLE_METHOD);
+ make_stdcls (&scm_class_accessor, "<accessor-method>",
+ scm_class_class, scm_class_simple_method, amethod_slots);
+ SCM_SET_CLASS_FLAGS (scm_class_accessor, SCM_CLASSF_ACCESSOR_METHOD);
+ make_stdcls (&scm_class_entity, "<entity>",
+ scm_class_entity_class, scm_class_object, SCM_EOL);
+ make_stdcls (&scm_class_entity_with_setter, "<entity-with-setter>",
+ scm_class_entity_class, scm_class_entity, SCM_EOL);
+ make_stdcls (&scm_class_generic, "<generic>",
+ scm_class_entity_class, scm_class_entity, gf_slots);
+ SCM_SET_CLASS_FLAGS (scm_class_generic, SCM_CLASSF_PURE_GENERIC);
+ make_stdcls (&scm_class_generic_with_setter, "<generic-with-setter>",
+ scm_class_entity_class,
+ SCM_LIST2 (scm_class_generic, scm_class_entity_with_setter),
+ SCM_EOL);
+#if 0
+ /* Patch cpl since compute_cpl doesn't support multiple inheritance. */
+ SCM_SLOT (scm_class_generic_with_setter, scm_si_cpl) =
+ scm_append (SCM_LIST3 (SCM_LIST2 (scm_class_generic_with_setter,
+ scm_class_generic),
+ SCM_SLOT (scm_class_entity_with_setter,
+ scm_si_cpl),
+ SCM_EOL));
+#endif
+ SCM_SET_CLASS_FLAGS (scm_class_generic_with_setter, SCM_CLASSF_PURE_GENERIC);
+
+ /* Primitive types classes */
+ make_stdcls (&scm_class_boolean, "<boolean>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_char, "<char>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_list, "<list>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_pair, "<pair>",
+ scm_class_class, scm_class_list, SCM_EOL);
+ make_stdcls (&scm_class_null, "<null>",
+ scm_class_class, scm_class_list, SCM_EOL);
+ make_stdcls (&scm_class_string, "<string>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_symbol, "<symbol>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_vector, "<vector>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_number, "<number>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_complex, "<complex>",
+ scm_class_class, scm_class_number, SCM_EOL);
+ make_stdcls (&scm_class_real, "<real>",
+ scm_class_class, scm_class_complex, SCM_EOL);
+ make_stdcls (&scm_class_integer, "<integer>",
+ scm_class_class, scm_class_real, SCM_EOL);
+ make_stdcls (&scm_class_keyword, "<keyword>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_unknown, "<unknown>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_procedure, "<procedure>",
+ scm_class_procedure_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_procedure_with_setter, "<procedure-with-setter>",
+ scm_class_procedure_class, scm_class_procedure, SCM_EOL);
+ make_stdcls (&scm_class_primitive_generic, "<primitive-generic>",
+ scm_class_procedure_class, scm_class_procedure, SCM_EOL);
+ make_stdcls (&scm_class_port, "<port>",
+ scm_class_class, scm_class_top, SCM_EOL);
+ make_stdcls (&scm_class_input_port, "<input-port>",
+ scm_class_class, scm_class_port, SCM_EOL);
+ make_stdcls (&scm_class_output_port, "<output-port>",
+ scm_class_class, scm_class_port, SCM_EOL);
+ make_stdcls (&scm_class_input_output_port, "<input-output-port>",
+ scm_class_class,
+ SCM_LIST2 (scm_class_input_port, scm_class_output_port),
+ SCM_EOL);
+}
+
+/**********************************************************************
+ *
+ * Smob classes
+ *
+ **********************************************************************/
+
+static SCM
+make_class_from_template (char *template, char *type_name, SCM supers)
+{
+ SCM class, name;
+ if (type_name)
+ {
+ char buffer[100];
+ sprintf (buffer, template, type_name);
+ name = Intern (buffer);
+ }
+ else
+ name = SCM_GOOPS_UNBOUND;
+
+ class = scm_permanent_object (scm_basic_make_class (scm_class_class,
+ name,
+ supers,
+ SCM_EOL));
+
+ /* Only define name if doesn't already exist. */
+ if (!SCM_GOOPS_UNBOUNDP (name)
+ && SCM_FALSEP (scm_apply (scm_goops_lookup_closure,
+ SCM_LIST2 (name, SCM_BOOL_F),
+ SCM_EOL)))
+ {
+ /* Make sure we add the binding in the GOOPS module.
+ * This kludge is needed until DEFVAR ceases to use `define-public'
+ * or `define-public' ceases to use `current-module'.
+ */
+ SCM old_module = scm_select_module (scm_module_goops);
+ DEFVAR (name, class);
+ scm_select_module (old_module);
+ }
+ return class;
+}
+
+SCM
+scm_make_extended_class (char *type_name)
+{
+ return make_class_from_template ("<%s>",
+ type_name,
+ SCM_LIST1 (scm_class_top));
+}
+
+static void
+create_smob_classes (void)
+{
+ int i;
+
+ scm_smob_class = (SCM *) malloc (255 * sizeof (SCM));
+ for (i = 0; i < 255; ++i)
+ scm_smob_class[i] = 0;
+
+ scm_smob_class[SCM_TC2SMOBNUM (scm_tc16_big)] = scm_class_integer;
+ scm_smob_class[SCM_TC2SMOBNUM (scm_tc16_real)] = scm_class_real;
+ scm_smob_class[SCM_TC2SMOBNUM (scm_tc16_complex)] = scm_class_complex;
+ scm_smob_class[SCM_TC2SMOBNUM (scm_tc16_keyword)] = scm_class_keyword;
+
+ for (i = 0; i < scm_numsmob; ++i)
+ if (!scm_smob_class[i])
+ scm_smob_class[i] = scm_make_extended_class (SCM_SMOBNAME (i));
+}
+
+void
+scm_make_port_classes (int ptobnum, char *type_name)
+{
+ SCM c, class = make_class_from_template ("<%s-port>",
+ type_name,
+ SCM_LIST1 (scm_class_port));
+ scm_port_class[SCM_IN_PCLASS_INDEX + ptobnum]
+ = make_class_from_template ("<%s-input-port>",
+ type_name,
+ SCM_LIST2 (class, scm_class_input_port));
+ scm_port_class[SCM_OUT_PCLASS_INDEX + ptobnum]
+ = make_class_from_template ("<%s-output-port>",
+ type_name,
+ SCM_LIST2 (class, scm_class_output_port));
+ scm_port_class[SCM_INOUT_PCLASS_INDEX + ptobnum]
+ = c
+ = make_class_from_template ("<%s-input-output-port>",
+ type_name,
+ SCM_LIST2 (class,
+ scm_class_input_output_port));
+ /* Patch cpl (since this tree is too complex for the C level compute-cpl) */
+ SCM_SLOT (c, scm_si_cpl)
+ = scm_cons2 (c, class, SCM_SLOT (scm_class_input_output_port, scm_si_cpl));
+}
+
+static void
+create_port_classes (void)
+{
+ int i;
+
+ scm_port_class = (SCM *) malloc (3 * 256 * sizeof (SCM));
+ for (i = 0; i < 3 * 256; ++i)
+ scm_port_class[i] = 0;
+
+ for (i = 0; i < scm_numptob; ++i)
+ scm_make_port_classes (i, SCM_PTOBNAME (i));
+}
+
+static SCM
+make_struct_class (void *closure, SCM key, SCM data, SCM prev)
+{
+ if (SCM_NFALSEP (SCM_STRUCT_TABLE_NAME (data)))
+ SCM_SET_STRUCT_TABLE_CLASS (data,
+ scm_make_extended_class
+ (SCM_ROCHARS (SCM_STRUCT_TABLE_NAME (data))));
+ return SCM_UNSPECIFIED;
+}
+
+static void
+create_struct_classes (void)
+{
+ scm_internal_hash_fold (make_struct_class, 0, SCM_BOOL_F, scm_struct_table);
+}
+
+/**********************************************************************
+ *
+ * C interface
+ *
+ **********************************************************************/
+
+void
+scm_load_goops ()
+{
+ if (!goops_loaded_p)
+ scm_resolve_module (scm_read_0str ("(oop goops)"));
+}
+
+SCM
+scm_make_foreign_object (SCM class, SCM initargs)
+{
+ void * (*constructor) (SCM)
+ = (void * (*) (SCM)) SCM_SLOT (class, scm_si_constructor);
+ SCM_ASSERT (constructor != 0, class, "Can't make instances of this class",
+ s_make);
+ return scm_wrap_object (class, constructor (initargs));
+}
+
+static size_t
+scm_free_foreign_object (SCM *class, SCM *data)
+{
+ size_t (*destructor) (void *)
+ = (size_t (*) (void *)) class[scm_si_destructor];
+ return destructor (data);
+}
+
+SCM
+scm_make_class (SCM meta, char *s_name, SCM supers, size_t size,
+ void * (*constructor) (SCM initargs),
+ size_t (*destructor) (void *))
+{
+ SCM name, class;
+ name = Intern (s_name);
+ if (SCM_IMP (supers))
+ supers = SCM_LIST1 (scm_class_foreign_object);
+ class = scm_basic_basic_make_class (meta, name, supers, SCM_EOL);
+ scm_sys_inherit_magic_x (class, supers);
+
+ if (destructor != 0)
+ {
+ SCM_SLOT (class, scm_si_destructor) = (SCM) destructor;
+ SCM_SET_CLASS_DESTRUCTOR (class, scm_free_foreign_object);
+ }
+ else if (size > 0)
+ {
+ SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light);
+ SCM_SET_CLASS_INSTANCE_SIZE (class, size);
+ }
+
+ SCM_SLOT (class, scm_si_layout) = SCM_CAR (scm_intern ("", 0));
+ SCM_SLOT (class, scm_si_constructor) = (SCM) constructor;
+
+ return class;
+}
+
+SCM_SYMBOL (sym_o, "o");
+SCM_SYMBOL (sym_x, "x");
+
+SCM_KEYWORD (k_accessor, "accessor");
+SCM_KEYWORD (k_getter, "getter");
+
+static SCM
+default_setter (SCM obj, SCM c)
+{
+ scm_misc_error ("slot-set!", "read-only slot", SCM_EOL);
+ return 0;
+}
+
+void
+scm_add_slot (SCM class, char *slot_name, SCM slot_class,
+ SCM (*getter) (SCM obj),
+ SCM (*setter) (SCM obj, SCM x),
+ char *accessor_name)
+{
+ {
+ SCM get = scm_make_subr_opt ("goops:get", scm_tc7_subr_1, getter, 0);
+ SCM set = scm_make_subr_opt ("goops:set", scm_tc7_subr_2,
+ setter ? setter : default_setter, 0);
+ SCM getm = scm_closure (SCM_LIST2 (SCM_LIST1 (sym_o),
+ SCM_LIST2 (get, sym_o)),
+ SCM_EOL);
+ SCM setm = scm_closure (SCM_LIST2 (SCM_LIST2 (sym_o, sym_x),
+ SCM_LIST3 (set, sym_o, sym_x)),
+ SCM_EOL);
+ {
+ SCM name = SCM_CAR (scm_intern0 (slot_name));
+ SCM aname = SCM_CAR (scm_intern0 (accessor_name));
+ SCM gf = scm_ensure_accessor (aname);
+ SCM slot = SCM_LIST5 (name,
+ k_class, slot_class,
+ setter ? k_accessor : k_getter,
+ gf);
+ SCM gns = SCM_LIST4 (name, SCM_BOOL_F, get, set);
+
+ scm_add_method (gf, scm_make (SCM_LIST5 (scm_class_accessor,
+ k_specializers,
+ SCM_LIST1 (class),
+ k_procedure, getm)));
+ scm_add_method (scm_setter (gf),
+ scm_make (SCM_LIST5 (scm_class_accessor,
+ k_specializers,
+ SCM_LIST2 (class,
+ scm_class_top),
+ k_procedure, setm)));
+ DEFVAR (aname, gf);
+
+ SCM_SLOT (class, scm_si_slots)
+ = scm_append_x (SCM_LIST2 (SCM_SLOT (class, scm_si_slots),
+ SCM_LIST1 (slot)));
+ SCM_SLOT (class, scm_si_getters_n_setters)
+ = scm_append_x (SCM_LIST2 (SCM_SLOT (class, scm_si_getters_n_setters),
+ SCM_LIST1 (gns)));
+ }
+ }
+ {
+ int n = SCM_INUM (SCM_SLOT (class, scm_si_nfields));
+
+ SCM_SLOT (class, scm_si_nfields)
+ = SCM_MAKINUM (n + 1);
+ }
+}
+
+SCM
+scm_wrap_object (SCM class, void *data)
+{
+ SCM z;
+ SCM_NEWCELL2 (z);
+ SCM_SETCDR (z, (SCM) data);
+ SCM_SET_STRUCT_GC_CHAIN (z, 0);
+ SCM_SETCAR (z, SCM_UNPACK (SCM_CDR (class)) | scm_tc3_cons_gloc);
+ return z;
+}
+
+SCM scm_components;
+
+SCM
+scm_wrap_component (SCM class, SCM container, void *data)
+{
+ SCM obj = scm_wrap_object (class, data);
+ SCM handle = scm_hash_fn_create_handle_x (scm_components,
+ obj,
+ SCM_BOOL_F,
+ scm_struct_ihashq,
+ scm_sloppy_assq,
+ 0);
+ SCM_SETCDR (handle, container);
+ return obj;
+}
+
+SCM
+scm_ensure_accessor (SCM name)
+{
+ SCM gf = scm_apply (SCM_TOP_LEVEL_LOOKUP_CLOSURE,
+ SCM_LIST2 (name, SCM_BOOL_F),
+ SCM_EOL);
+ if (!SCM_IS_A_P (gf, scm_class_generic_with_setter))
+ {
+ gf = scm_make (SCM_LIST3 (scm_class_generic, k_name, name));
+ gf = scm_make (SCM_LIST5 (scm_class_generic_with_setter,
+ k_name, name,
+ k_setter, gf));
+ }
+ return gf;
+}
+
+SCM_SYMBOL (sym_internal_add_method_x, "internal-add-method!");
+
+void
+scm_add_method (SCM gf, SCM m)
+{
+ scm_eval2 (SCM_LIST3 (sym_internal_add_method_x, gf, m),
+ scm_goops_lookup_closure);
+}
+
+#ifdef GUILE_DEBUG
+/*
+ * Debugging utilities
+ */
+
+SCM_PROC (s_pure_generic_p, "pure-generic?", 1, 0, 0, scm_pure_generic_p);
+
+SCM
+scm_pure_generic_p (SCM obj)
+{
+ return (SCM_NIMP (obj) && SCM_STRUCTP (obj) && SCM_PUREGENERICP (obj)
+ ? SCM_BOOL_T
+ : SCM_BOOL_F);
+}
+
+#endif /* GUILE_DEBUG */
+
+/*
+ * Initialization
+ */
+
+SCM_PROC (scm_sys_goops_loaded, "%goops-loaded", 0, 0, 0, sys_goops_loaded);
+
+static SCM
+sys_goops_loaded ()
+{
+ goops_loaded_p = 1;
+ var_compute_applicable_methods
+ = SCM_CDR (scm_apply (scm_goops_lookup_closure,
+ SCM_LIST2 (SCM_CAR (var_compute_applicable_methods),
+ SCM_BOOL_F),
+ SCM_EOL));
+ return SCM_UNSPECIFIED;
+}
+
+SCM scm_module_goops;
+
+void
+scm_init_goops (void)
+{
+ SCM old_module;
+ scm_module_goops = scm_make_module (scm_read_0str ("(oop goops)"));
+ old_module = scm_select_module (scm_module_goops);
+
+ scm_goops_lookup_closure = scm_module_lookup_closure (scm_module_goops);
+
+ scm_components = scm_permanent_object (scm_make_weak_key_hash_table
+ (SCM_MAKINUM (37)));
+
+ goops_rstate = scm_c_make_rstate ("GOOPS", 5);
+
+#include "libguile/goops.x"
+
+ list_of_no_method = scm_permanent_object (SCM_LIST1 (sym_no_method));
+
+ hell = scm_must_malloc (hell_size, "hell");
+#ifdef USE_THREADS
+ scm_mutex_init (&hell_mutex);
+#endif
+
+ create_basic_classes ();
+ create_standard_classes ();
+ create_smob_classes ();
+ create_struct_classes ();
+ create_port_classes ();
+
+ {
+ SCM name = SCM_CAR (scm_intern0 ("no-applicable-method"));
+ scm_no_applicable_method
+ = scm_permanent_object (scm_make (SCM_LIST3 (scm_class_generic,
+ k_name,
+ name)));
+ DEFVAR (name, scm_no_applicable_method);
+ }
+
+ scm_select_module (old_module);
+}
+
+void
+scm_init_oop_goops_goopscore_module ()
+{
+ scm_register_module_xxx ("oop goops goopscore", (void *) scm_init_goops);
+}
HCoop / bpt / guile.git / commitdiff