1 /* Copyright (C) 1998,1999,2000,2001 Free Software Foundation, Inc.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2, or (at your option)
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this software; see the file COPYING. If not, write to
15 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
21 * The exception is that, if you link the GUILE library with other files
22 * to produce an executable, this does not by itself cause the
23 * resulting executable to be covered by the GNU General Public License.
24 * Your use of that executable is in no way restricted on account of
25 * linking the GUILE library code into it.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
30 * This exception applies only to the code released by the
31 * Free Software Foundation under the name GUILE. If you copy
32 * code from other Free Software Foundation releases into a copy of
33 * GUILE, as the General Public License permits, the exception does
34 * not apply to the code that you add in this way. To avoid misleading
35 * anyone as to the status of such modified files, you must delete
36 * this exception notice from them.
38 * If you write modifications of your own for GUILE, it is your choice
39 * whether to permit this exception to apply to your modifications.
40 * If you do not wish that, delete this exception notice. */
43 /* This software is a derivative work of other copyrighted softwares; the
44 * copyright notices of these softwares are placed in the file COPYRIGHTS
46 * This file is based upon stklos.c from the STk distribution by
47 * Erick Gallesio <eg@unice.fr>.
52 #include "libguile/_scm.h"
53 #include "libguile/alist.h"
54 #include "libguile/debug.h"
55 #include "libguile/dynl.h"
56 #include "libguile/dynwind.h"
57 #include "libguile/eval.h"
58 #include "libguile/hashtab.h"
59 #include "libguile/keywords.h"
60 #include "libguile/macros.h"
61 #include "libguile/modules.h"
62 #include "libguile/objects.h"
63 #include "libguile/ports.h"
64 #include "libguile/procprop.h"
65 #include "libguile/random.h"
66 #include "libguile/smob.h"
67 #include "libguile/strings.h"
68 #include "libguile/strports.h"
69 #include "libguile/vectors.h"
70 #include "libguile/weaks.h"
72 #include "libguile/validate.h"
73 #include "libguile/goops.h"
75 #define SPEC_OF(x) SCM_SLOT (x, scm_si_specializers)
77 #define DEFVAR(v,val) \
78 { scm_eval (SCM_LIST3 (scm_sym_define_public, (v), (val)), \
80 /* Temporary hack until we get the new module system */
81 /*fixme* Should optimize by keeping track of the variable object itself */
82 #define GETVAR(v) (SCM_CDDR (scm_apply (scm_goops_lookup_closure, \
83 SCM_LIST2 ((v), SCM_BOOL_F), \
86 /* Fixme: Should use already interned symbols */
87 #define CALL_GF1(name,a) (scm_apply (GETVAR (scm_str2symbol (name)), \
88 SCM_LIST1 (a), SCM_EOL))
89 #define CALL_GF2(name,a,b) (scm_apply (GETVAR (scm_str2symbol (name)), \
90 SCM_LIST2 (a, b), SCM_EOL))
91 #define CALL_GF3(name,a,b,c) (scm_apply (GETVAR (scm_str2symbol (name)), \
92 SCM_LIST3 (a, b, c), SCM_EOL))
93 #define CALL_GF4(name,a,b,c,d) (scm_apply (GETVAR (scm_str2symbol (name)), \
94 SCM_LIST4 (a, b, c, d), SCM_EOL))
96 /* Class redefinition protocol:
98 A class is represented by a heap header h1 which points to a
99 malloc:ed memory block m1.
101 When a new version of a class is created, a new header h2 and
102 memory block m2 are allocated. The headers h1 and h2 then switch
103 pointers so that h1 refers to m2 and h2 to m1. In this way, names
104 bound to h1 will point to the new class at the same time as h2 will
105 be a handle which the GC will us to free m1.
107 The `redefined' slot of m1 will be set to point to h1. An old
108 instance will have it's class pointer (the CAR of the heap header)
109 pointing to m1. The non-immediate `redefined'-slot in m1 indicates
110 the class modification and the new class pointer can be found via
114 #define SCM_CLASS_REDEF(c) SCM_SLOT (c, scm_si_redefined)
115 /* The following definition is located in libguile/objects.h:
116 #define SCM_OBJ_CLASS_REDEF(x) (SCM_STRUCT_VTABLE_DATA(x)[scm_si_redefined])
119 #define TEST_CHANGE_CLASS(obj, class) \
121 class = SCM_CLASS_OF (obj); \
122 if (SCM_OBJ_CLASS_REDEF (obj) != SCM_BOOL_F) \
123 CALL_GF3 ("change-object-class", \
124 obj, class, SCM_OBJ_CLASS_REDEF (obj)); \
127 #define NXT_MTHD_METHODS(m) (SCM_VELTS (m)[1])
128 #define NXT_MTHD_ARGS(m) (SCM_VELTS (m)[2])
130 #define SCM_GOOPS_UNBOUND SCM_UNBOUND
131 #define SCM_GOOPS_UNBOUNDP(x) ((x) == SCM_GOOPS_UNBOUND)
133 static int goops_loaded_p
= 0;
134 static scm_rstate
*goops_rstate
;
136 static SCM scm_goops_lookup_closure
;
138 /* Some classes are defined in libguile/objects.c. */
139 SCM scm_class_top
, scm_class_object
, scm_class_class
;
140 SCM scm_class_entity
, scm_class_entity_with_setter
;
141 SCM scm_class_generic
, scm_class_generic_with_setter
, scm_class_method
;
142 SCM scm_class_simple_method
, scm_class_accessor
;
143 SCM scm_class_procedure_class
;
144 SCM scm_class_operator_class
, scm_class_operator_with_setter_class
;
145 SCM scm_class_entity_class
;
146 SCM scm_class_number
, scm_class_list
;
147 SCM scm_class_keyword
;
148 SCM scm_class_port
, scm_class_input_output_port
;
149 SCM scm_class_input_port
, scm_class_output_port
;
150 SCM scm_class_foreign_class
, scm_class_foreign_object
;
151 SCM scm_class_foreign_slot
;
152 SCM scm_class_self
, scm_class_protected
;
153 SCM scm_class_opaque
, scm_class_read_only
;
154 SCM scm_class_protected_opaque
, scm_class_protected_read_only
;
156 SCM scm_class_int
, scm_class_float
, scm_class_double
;
158 SCM_SYMBOL (scm_sym_define_public
, "define-public");
160 static SCM
scm_make_unbound (void);
161 static SCM
scm_unbound_p (SCM obj
);
162 static SCM
scm_assert_bound (SCM value
, SCM obj
);
163 static SCM
scm_at_assert_bound_ref (SCM obj
, SCM index
);
164 static SCM
scm_sys_goops_loaded (void);
166 /******************************************************************************
170 * This version doesn't handle multiple-inheritance. It serves only for
171 * booting classes and will be overaloaded in Scheme
173 ******************************************************************************/
177 compute_cpl (SCM supers
, SCM res
)
179 return (SCM_NULLP (supers
)
181 : compute_cpl (SCM_SLOT (SCM_CAR (supers
), scm_si_direct_supers
),
182 scm_cons (SCM_CAR (supers
), res
)));
187 map (SCM (*proc
) (SCM
), SCM ls
)
192 SCM res
= scm_cons (proc (SCM_CAR (ls
)), SCM_EOL
);
195 while (SCM_NIMP (ls
))
197 SCM_SETCDR (h
, scm_cons (proc (SCM_CAR (ls
)), SCM_EOL
));
209 while (SCM_NIMP (ls
))
211 SCM el
= SCM_CAR (ls
);
212 if (SCM_FALSEP (scm_c_memq (el
, res
)))
213 res
= scm_cons (el
, res
);
220 compute_cpl (SCM
class)
223 return CALL_GF1 ("compute-cpl", class);
226 SCM supers
= SCM_SLOT (class, scm_si_direct_supers
);
227 SCM ls
= scm_append (scm_acons (class, supers
,
228 map (compute_cpl
, supers
)));
229 return scm_reverse_x (filter_cpl (ls
), SCM_EOL
);
233 /******************************************************************************
237 ******************************************************************************/
240 remove_duplicate_slots (SCM l
, SCM res
, SCM slots_already_seen
)
248 if (!SCM_SYMBOLP (tmp
))
249 scm_misc_error ("%compute-slots", "bad slot name ~S", SCM_LIST1 (tmp
));
251 if (SCM_FALSEP (scm_c_memq (tmp
, slots_already_seen
))) {
252 res
= scm_cons (SCM_CAR (l
), res
);
253 slots_already_seen
= scm_cons (tmp
, slots_already_seen
);
256 return remove_duplicate_slots (SCM_CDR (l
), res
, slots_already_seen
);
260 build_slots_list (SCM dslots
, SCM cpl
)
262 register SCM res
= dslots
;
264 for (cpl
= SCM_CDR(cpl
); SCM_NNULLP(cpl
); cpl
= SCM_CDR(cpl
))
265 res
= scm_append (SCM_LIST2 (SCM_SLOT (SCM_CAR (cpl
), scm_si_direct_slots
),
268 /* res contains a list of slots. Remove slots which appears more than once */
269 return remove_duplicate_slots (scm_reverse (res
), SCM_EOL
, SCM_EOL
);
276 while (SCM_NIMP (ls
))
278 if (!SCM_CONSP (SCM_CAR (ls
)))
279 SCM_SETCAR (ls
, scm_cons (SCM_CAR (ls
), SCM_EOL
));
286 SCM_DEFINE (scm_sys_compute_slots
, "%compute-slots", 1, 0, 0,
288 "Return a list consisting of the names of all slots belonging to\n"
289 "class @var{class}, i. e. the slots of @var{class} and of all of\n"
291 #define FUNC_NAME s_scm_sys_compute_slots
293 SCM_VALIDATE_CLASS (1, class);
294 return build_slots_list (SCM_SLOT (class, scm_si_direct_slots
),
295 SCM_SLOT (class, scm_si_cpl
));
300 /******************************************************************************
302 * compute-getters-n-setters
304 * This version doesn't handle slot options. It serves only for booting
305 * classes and will be overaloaded in Scheme.
307 ******************************************************************************/
309 SCM_KEYWORD (k_init_value
, "init-value");
310 SCM_KEYWORD (k_init_thunk
, "init-thunk");
313 compute_getters_n_setters (SCM slots
)
319 for ( ; SCM_NNULLP(slots
); slots
= SCM_CDR(slots
))
321 SCM init
= SCM_BOOL_F
;
322 SCM options
= SCM_CDAR (slots
);
323 if (SCM_NNULLP (options
))
325 init
= scm_get_keyword (k_init_value
, options
, 0);
327 init
= scm_closure (SCM_LIST2 (SCM_EOL
, init
), SCM_EOL
);
329 init
= scm_get_keyword (k_init_thunk
, options
, SCM_BOOL_F
);
331 *cdrloc
= scm_cons (scm_cons (SCM_CAAR (slots
),
335 cdrloc
= SCM_CDRLOC (*cdrloc
);
340 /******************************************************************************
344 ******************************************************************************/
346 /*fixme* Manufacture keywords in advance */
348 scm_i_get_keyword (SCM key
, SCM l
, int len
, SCM default_value
, const char *subr
)
352 for (i
= 0; i
!= len
; i
+= 2)
354 SCM obj
= SCM_CAR (l
);
356 if (!SCM_KEYWORDP (obj
))
357 scm_misc_error (subr
, "bad keyword: ~S", SCM_LIST1 (obj
));
358 else if (SCM_EQ_P (obj
, key
))
364 return default_value
;
368 SCM_DEFINE (scm_get_keyword
, "get-keyword", 3, 0, 0,
369 (SCM key
, SCM l
, SCM default_value
),
370 "Determine an associated value for the keyword @var{key} from\n"
371 "the list @var{l}. The list @var{l} has to consist of an even\n"
372 "number of elements, where, starting with the first, every\n"
373 "second element is a keyword, followed by its associated value.\n"
374 "If @var{l} does not hold a value for @var{key}, the value\n"
375 "@var{default_value} is returned.")
376 #define FUNC_NAME s_scm_get_keyword
380 SCM_ASSERT (SCM_KEYWORDP (key
), key
, SCM_ARG1
, FUNC_NAME
);
381 len
= scm_ilength (l
);
382 if (len
< 0 || len
% 2 == 1)
383 scm_misc_error (FUNC_NAME
, "Bad keyword-value list: ~S", SCM_LIST1 (l
));
385 return scm_i_get_keyword (key
, l
, len
, default_value
, FUNC_NAME
);
390 SCM_KEYWORD (k_init_keyword
, "init-keyword");
392 static SCM
get_slot_value (SCM
class, SCM obj
, SCM slotdef
);
393 static SCM
set_slot_value (SCM
class, SCM obj
, SCM slotdef
, SCM value
);
395 SCM_DEFINE (scm_sys_initialize_object
, "%initialize-object", 2, 0, 0,
396 (SCM obj
, SCM initargs
),
397 "Initialize the object @var{obj} with the given arguments\n"
399 #define FUNC_NAME s_scm_sys_initialize_object
401 SCM tmp
, get_n_set
, slots
;
402 SCM
class = SCM_CLASS_OF (obj
);
405 SCM_VALIDATE_INSTANCE (1, obj
);
406 n_initargs
= scm_ilength (initargs
);
407 SCM_ASSERT ((n_initargs
& 1) == 0, initargs
, SCM_ARG2
, FUNC_NAME
);
409 get_n_set
= SCM_SLOT (class, scm_si_getters_n_setters
);
410 slots
= SCM_SLOT (class, scm_si_slots
);
412 /* See for each slot how it must be initialized */
415 get_n_set
= SCM_CDR (get_n_set
), slots
= SCM_CDR (slots
))
417 SCM slot_name
= SCM_CAR (slots
);
420 if (SCM_NIMP (SCM_CDR (slot_name
)))
422 /* This slot admits (perhaps) to be initialized at creation time */
423 int n
= scm_ilength (SCM_CDR (slot_name
));
424 if (n
& 1) /* odd or -1 */
425 SCM_MISC_ERROR ("class contains bogus slot definition: ~S",
426 SCM_LIST1 (slot_name
));
427 tmp
= scm_i_get_keyword (k_init_keyword
,
432 slot_name
= SCM_CAR (slot_name
);
435 /* an initarg was provided for this slot */
436 if (!SCM_KEYWORDP (tmp
))
437 SCM_MISC_ERROR ("initarg must be a keyword. It was ~S",
439 slot_value
= scm_i_get_keyword (tmp
,
448 /* set slot to provided value */
449 set_slot_value (class, obj
, SCM_CAR (get_n_set
), slot_value
);
452 /* set slot to its :init-form if it exists */
453 tmp
= SCM_CADAR (get_n_set
);
454 if (tmp
!= SCM_BOOL_F
)
456 slot_value
= get_slot_value (class, obj
, SCM_CAR (get_n_set
));
457 if (SCM_GOOPS_UNBOUNDP (slot_value
))
459 SCM env
= SCM_EXTEND_ENV (SCM_EOL
, SCM_EOL
, SCM_ENV (tmp
));
460 set_slot_value (class,
463 scm_eval_body (SCM_CDR (SCM_CODE (tmp
)),
475 SCM_KEYWORD (k_class
, "class");
477 SCM_DEFINE (scm_sys_prep_layout_x
, "%prep-layout!", 1, 0, 0,
480 #define FUNC_NAME s_scm_sys_prep_layout_x
484 SCM nfields
, slots
, type
;
486 SCM_VALIDATE_INSTANCE (1, class);
487 slots
= SCM_SLOT (class, scm_si_slots
);
488 nfields
= SCM_SLOT (class, scm_si_nfields
);
489 if (!SCM_INUMP (nfields
) || SCM_INUM (nfields
) < 0)
490 SCM_MISC_ERROR ("bad value in nfields slot: ~S",
491 SCM_LIST1 (nfields
));
492 n
= 2 * SCM_INUM (nfields
);
493 if (n
< sizeof (SCM_CLASS_CLASS_LAYOUT
) - 1
494 && SCM_SUBCLASSP (class, scm_class_class
))
495 SCM_MISC_ERROR ("class object doesn't have enough fields: ~S",
496 SCM_LIST1 (nfields
));
498 s
= n
> 0 ? scm_must_malloc (n
, FUNC_NAME
) : 0;
499 for (i
= 0; i
< n
; i
+= 2)
501 if (!SCM_CONSP (slots
))
502 SCM_MISC_ERROR ("to few slot definitions", SCM_EOL
);
503 len
= scm_ilength (SCM_CDAR (slots
));
504 type
= scm_i_get_keyword (k_class
, SCM_CDAR (slots
), len
, SCM_BOOL_F
,
506 if (SCM_NIMP (type
) && SCM_SUBCLASSP (type
, scm_class_foreign_slot
))
508 if (SCM_SUBCLASSP (type
, scm_class_self
))
510 else if (SCM_SUBCLASSP (type
, scm_class_protected
))
515 if (SCM_SUBCLASSP (type
, scm_class_opaque
))
517 else if (SCM_SUBCLASSP (type
, scm_class_read_only
))
529 slots
= SCM_CDR (slots
);
531 SCM_SLOT (class, scm_si_layout
) = scm_mem2symbol (s
, n
);
534 return SCM_UNSPECIFIED
;
538 static void prep_hashsets (SCM
);
540 SCM_DEFINE (scm_sys_inherit_magic_x
, "%inherit-magic!", 2, 0, 0,
541 (SCM
class, SCM dsupers
),
543 #define FUNC_NAME s_scm_sys_inherit_magic_x
547 SCM_VALIDATE_INSTANCE (1, class);
548 while (SCM_NNULLP (ls
))
550 SCM_ASSERT (SCM_CONSP (ls
)
551 && SCM_INSTANCEP (SCM_CAR (ls
)),
555 flags
|= SCM_CLASS_FLAGS (SCM_CAR (ls
));
558 flags
&= SCM_CLASSF_INHERIT
;
559 if (flags
& SCM_CLASSF_ENTITY
)
560 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_entity
);
563 int n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
566 * We could avoid calling scm_must_malloc in the allocation code
567 * (in which case the following two lines are needed). Instead
568 * we make 0-slot instances non-light, so that the light case
569 * can be handled without special cases.
572 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_0
);
574 if (n
> 0 && !(flags
& SCM_CLASSF_METACLASS
))
576 /* NOTE: The following depends on scm_struct_i_size. */
577 flags
|= SCM_STRUCTF_LIGHT
+ n
* sizeof (SCM
); /* use light representation */
578 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
581 SCM_SET_CLASS_FLAGS (class, flags
);
583 prep_hashsets (class);
585 return SCM_UNSPECIFIED
;
590 prep_hashsets (SCM
class)
594 for (i
= 0; i
< 7; ++i
)
595 SCM_SLOT (class, scm_si_hashsets
+ i
)
596 = SCM_PACK (scm_c_uniform32 (goops_rstate
));
599 /******************************************************************************/
602 scm_basic_basic_make_class (SCM
class, SCM name
, SCM dsupers
, SCM dslots
)
604 SCM z
, cpl
, slots
, nfields
, g_n_s
;
606 /* Allocate one instance */
607 z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
609 /* Initialize its slots */
611 cpl
= compute_cpl (dsupers
, SCM_LIST1(z
));
613 SCM_SLOT (z
, scm_si_direct_supers
) = dsupers
;
614 cpl
= compute_cpl (z
);
615 slots
= build_slots_list (maplist (dslots
), cpl
);
616 nfields
= SCM_MAKINUM (scm_ilength (slots
));
617 g_n_s
= compute_getters_n_setters (slots
);
619 SCM_SLOT(z
, scm_si_name
) = name
;
620 SCM_SLOT(z
, scm_si_direct_slots
) = dslots
;
621 SCM_SLOT(z
, scm_si_direct_subclasses
) = SCM_EOL
;
622 SCM_SLOT(z
, scm_si_direct_methods
) = SCM_EOL
;
623 SCM_SLOT(z
, scm_si_cpl
) = cpl
;
624 SCM_SLOT(z
, scm_si_slots
) = slots
;
625 SCM_SLOT(z
, scm_si_nfields
) = nfields
;
626 SCM_SLOT(z
, scm_si_getters_n_setters
) = g_n_s
;
627 SCM_SLOT(z
, scm_si_redefined
) = SCM_BOOL_F
;
628 SCM_SLOT(z
, scm_si_environment
)
629 = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE
);
631 /* Add this class in the direct-subclasses slot of dsupers */
634 for (tmp
= dsupers
; SCM_NNULLP(tmp
); tmp
= SCM_CDR(tmp
))
635 SCM_SLOT(SCM_CAR(tmp
), scm_si_direct_subclasses
)
636 = scm_cons(z
, SCM_SLOT(SCM_CAR(tmp
), scm_si_direct_subclasses
));
639 /* Support for the underlying structs: */
640 SCM_SET_CLASS_FLAGS (z
, (class == scm_class_entity_class
641 ? (SCM_CLASSF_GOOPS_OR_VALID
642 | SCM_CLASSF_OPERATOR
644 : class == scm_class_operator_class
645 ? SCM_CLASSF_GOOPS_OR_VALID
| SCM_CLASSF_OPERATOR
646 : SCM_CLASSF_GOOPS_OR_VALID
));
651 scm_basic_make_class (SCM
class, SCM name
, SCM dsupers
, SCM dslots
)
653 SCM z
= scm_basic_basic_make_class (class, name
, dsupers
, dslots
);
654 scm_sys_inherit_magic_x (z
, dsupers
);
655 scm_sys_prep_layout_x (z
);
659 /******************************************************************************/
662 build_class_class_slots ()
665 scm_cons (SCM_LIST3 (scm_str2symbol ("layout"),
667 scm_class_protected_read_only
),
668 scm_cons (SCM_LIST3 (scm_str2symbol ("vcell"),
671 scm_cons (SCM_LIST3 (scm_str2symbol ("vtable"),
674 scm_cons (scm_str2symbol ("print"),
675 scm_cons (SCM_LIST3 (scm_str2symbol ("procedure"),
677 scm_class_protected_opaque
),
678 scm_cons (SCM_LIST3 (scm_str2symbol ("setter"),
680 scm_class_protected_opaque
),
681 scm_cons (scm_str2symbol ("redefined"),
682 scm_cons (SCM_LIST3 (scm_str2symbol ("h0"),
685 scm_cons (SCM_LIST3 (scm_str2symbol ("h1"),
688 scm_cons (SCM_LIST3 (scm_str2symbol ("h2"),
691 scm_cons (SCM_LIST3 (scm_str2symbol ("h3"),
694 scm_cons (SCM_LIST3 (scm_str2symbol ("h4"),
697 scm_cons (SCM_LIST3 (scm_str2symbol ("h5"),
700 scm_cons (SCM_LIST3 (scm_str2symbol ("h6"),
703 scm_cons (SCM_LIST3 (scm_str2symbol ("h7"),
706 scm_cons (scm_str2symbol ("name"),
707 scm_cons (scm_str2symbol ("direct-supers"),
708 scm_cons (scm_str2symbol ("direct-slots"),
709 scm_cons (scm_str2symbol ("direct-subclasses"),
710 scm_cons (scm_str2symbol ("direct-methods"),
711 scm_cons (scm_str2symbol ("cpl"),
712 scm_cons (scm_str2symbol ("default-slot-definition-class"),
713 scm_cons (scm_str2symbol ("slots"),
714 scm_cons (scm_str2symbol ("getters-n-setters"), /* name-access */
715 scm_cons (scm_str2symbol ("keyword-access"),
716 scm_cons (scm_str2symbol ("nfields"),
717 scm_cons (scm_str2symbol ("environment"),
718 SCM_EOL
))))))))))))))))))))))))))));
722 create_basic_classes (void)
724 /* SCM slots_of_class = build_class_class_slots (); */
726 /**** <scm_class_class> ****/
727 SCM cs
= scm_makfrom0str (SCM_CLASS_CLASS_LAYOUT
728 + 2 * scm_vtable_offset_user
);
729 SCM name
= scm_str2symbol ("<class>");
730 scm_class_class
= scm_permanent_object (scm_make_vtable_vtable (cs
,
733 SCM_SET_CLASS_FLAGS (scm_class_class
, (SCM_CLASSF_GOOPS_OR_VALID
734 | SCM_CLASSF_METACLASS
));
736 SCM_SLOT(scm_class_class
, scm_si_name
) = name
;
737 SCM_SLOT(scm_class_class
, scm_si_direct_supers
) = SCM_EOL
; /* will be changed */
738 /* SCM_SLOT(scm_class_class, scm_si_direct_slots) = slots_of_class; */
739 SCM_SLOT(scm_class_class
, scm_si_direct_subclasses
)= SCM_EOL
;
740 SCM_SLOT(scm_class_class
, scm_si_direct_methods
) = SCM_EOL
;
741 SCM_SLOT(scm_class_class
, scm_si_cpl
) = SCM_EOL
; /* will be changed */
742 /* SCM_SLOT(scm_class_class, scm_si_slots) = slots_of_class; */
743 SCM_SLOT(scm_class_class
, scm_si_nfields
) = SCM_MAKINUM (SCM_N_CLASS_SLOTS
);
744 /* SCM_SLOT(scm_class_class, scm_si_getters_n_setters)
745 = compute_getters_n_setters (slots_of_class); */
746 SCM_SLOT(scm_class_class
, scm_si_redefined
) = SCM_BOOL_F
;
747 SCM_SLOT(scm_class_class
, scm_si_environment
)
748 = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE
);
750 prep_hashsets (scm_class_class
);
752 DEFVAR(name
, scm_class_class
);
754 /**** <scm_class_top> ****/
755 name
= scm_str2symbol ("<top>");
756 scm_class_top
= scm_permanent_object (scm_basic_make_class (scm_class_class
,
761 DEFVAR(name
, scm_class_top
);
763 /**** <scm_class_object> ****/
764 name
= scm_str2symbol ("<object>");
765 scm_class_object
= scm_permanent_object (scm_basic_make_class (scm_class_class
,
767 SCM_LIST1 (scm_class_top
),
770 DEFVAR (name
, scm_class_object
);
772 /* <top> <object> and <class> were partially initialized. Correct them here */
773 SCM_SLOT (scm_class_object
, scm_si_direct_subclasses
) = SCM_LIST1 (scm_class_class
);
775 SCM_SLOT (scm_class_class
, scm_si_direct_supers
) = SCM_LIST1 (scm_class_object
);
776 SCM_SLOT (scm_class_class
, scm_si_cpl
) = SCM_LIST3 (scm_class_class
, scm_class_object
, scm_class_top
);
779 /******************************************************************************/
781 SCM_DEFINE (scm_instance_p
, "instance?", 1, 0, 0,
783 "Return @code{#t} if @var{obj} is an instance.")
784 #define FUNC_NAME s_scm_instance_p
786 return SCM_BOOL (SCM_INSTANCEP (obj
));
791 /******************************************************************************
793 * Meta object accessors
795 ******************************************************************************/
796 SCM_DEFINE (scm_class_name
, "class-name", 1, 0, 0,
798 "Return the class name of @var{obj}.")
799 #define FUNC_NAME s_scm_class_name
801 SCM_VALIDATE_CLASS (1, obj
);
802 return scm_slot_ref (obj
, scm_str2symbol ("name"));
806 SCM_DEFINE (scm_class_direct_supers
, "class-direct-supers", 1, 0, 0,
808 "Return the direct superclasses of the class @var{obj}.")
809 #define FUNC_NAME s_scm_class_direct_supers
811 SCM_VALIDATE_CLASS (1, obj
);
812 return scm_slot_ref (obj
, scm_str2symbol ("direct-supers"));
816 SCM_DEFINE (scm_class_direct_slots
, "class-direct-slots", 1, 0, 0,
818 "Return the direct slots of the class @var{obj}.")
819 #define FUNC_NAME s_scm_class_direct_slots
821 SCM_VALIDATE_CLASS (1, obj
);
822 return scm_slot_ref (obj
, scm_str2symbol ("direct-slots"));
826 SCM_DEFINE (scm_class_direct_subclasses
, "class-direct-subclasses", 1, 0, 0,
828 "Return the direct subclasses of the class @var{obj}.")
829 #define FUNC_NAME s_scm_class_direct_subclasses
831 SCM_VALIDATE_CLASS (1, obj
);
832 return scm_slot_ref(obj
, scm_str2symbol ("direct-subclasses"));
836 SCM_DEFINE (scm_class_direct_methods
, "class-direct-methods", 1, 0, 0,
838 "Return the direct methods of the class @var{obj}")
839 #define FUNC_NAME s_scm_class_direct_methods
841 SCM_VALIDATE_CLASS (1, obj
);
842 return scm_slot_ref (obj
, scm_str2symbol ("direct-methods"));
846 SCM_DEFINE (scm_class_precedence_list
, "class-precedence-list", 1, 0, 0,
848 "Return the class precedence list of the class @var{obj}.")
849 #define FUNC_NAME s_scm_class_precedence_list
851 SCM_VALIDATE_CLASS (1, obj
);
852 return scm_slot_ref (obj
, scm_str2symbol ("cpl"));
856 SCM_DEFINE (scm_class_slots
, "class-slots", 1, 0, 0,
858 "Return the slot list of the class @var{obj}.")
859 #define FUNC_NAME s_scm_class_slots
861 SCM_VALIDATE_CLASS (1, obj
);
862 return scm_slot_ref (obj
, scm_str2symbol ("slots"));
866 SCM_DEFINE (scm_class_environment
, "class-environment", 1, 0, 0,
868 "Return the environment of the class @var{obj}.")
869 #define FUNC_NAME s_scm_class_environment
871 SCM_VALIDATE_CLASS (1, obj
);
872 return scm_slot_ref(obj
, scm_str2symbol ("environment"));
877 SCM_DEFINE (scm_generic_function_name
, "generic-function-name", 1, 0, 0,
879 "Return the name of the generic function @var{obj}.")
880 #define FUNC_NAME s_scm_generic_function_name
882 SCM_VALIDATE_GENERIC (1, obj
);
883 return scm_procedure_property (obj
, scm_sym_name
);
887 SCM_DEFINE (scm_generic_function_methods
, "generic-function-methods", 1, 0, 0,
889 "Return the methods of the generic function @var{obj}.")
890 #define FUNC_NAME s_scm_generic_function_methods
892 SCM_VALIDATE_GENERIC (1, obj
);
893 return scm_slot_ref (obj
, scm_str2symbol ("methods"));
898 SCM_DEFINE (scm_method_generic_function
, "method-generic-function", 1, 0, 0,
900 "Return the generic function fot the method @var{obj}.")
901 #define FUNC_NAME s_scm_method_generic_function
903 SCM_VALIDATE_METHOD (1, obj
);
904 return scm_slot_ref (obj
, scm_str2symbol ("generic-function"));
908 SCM_DEFINE (scm_method_specializers
, "method-specializers", 1, 0, 0,
910 "Return specializers of the method @var{obj}.")
911 #define FUNC_NAME s_scm_method_specializers
913 SCM_VALIDATE_METHOD (1, obj
);
914 return scm_slot_ref (obj
, scm_str2symbol ("specializers"));
918 SCM_DEFINE (scm_method_procedure
, "method-procedure", 1, 0, 0,
920 "Return the procedure of the method @var{obj}.")
921 #define FUNC_NAME s_scm_method_procedure
923 SCM_VALIDATE_METHOD (1, obj
);
924 return scm_slot_ref (obj
, scm_str2symbol ("procedure"));
928 SCM_DEFINE (scm_accessor_method_slot_definition
, "accessor-method-slot-definition", 1, 0, 0,
930 "Return the slot definition of the accessor @var{obj}.")
931 #define FUNC_NAME s_scm_accessor_method_slot_definition
933 SCM_VALIDATE_ACCESSOR (1, obj
);
934 return scm_slot_ref (obj
, scm_str2symbol ("slot-definition"));
938 SCM_DEFINE (scm_sys_tag_body
, "%tag-body", 1, 0, 0,
940 "Internal GOOPS magic---don't use this function!")
941 #define FUNC_NAME s_scm_sys_tag_body
943 return scm_cons (SCM_IM_LAMBDA
, body
);
947 /******************************************************************************
949 * S l o t a c c e s s
951 ******************************************************************************/
953 SCM_DEFINE (scm_make_unbound
, "make-unbound", 0, 0, 0,
955 "Return the unbound value.")
956 #define FUNC_NAME s_scm_make_unbound
958 return SCM_GOOPS_UNBOUND
;
962 SCM_DEFINE (scm_unbound_p
, "unbound?", 1, 0, 0,
964 "Return @code{#t} if @var{obj} is unbound.")
965 #define FUNC_NAME s_scm_unbound_p
967 return SCM_GOOPS_UNBOUNDP (obj
) ? SCM_BOOL_T
: SCM_BOOL_F
;
971 SCM_DEFINE (scm_assert_bound
, "assert-bound", 2, 0, 0,
972 (SCM value
, SCM obj
),
973 "Return @var{value} if it is bound, and invoke the\n"
974 "@var{slot-unbound} method of @var{obj} if it is not.")
975 #define FUNC_NAME s_scm_assert_bound
977 if (SCM_GOOPS_UNBOUNDP (value
))
978 return CALL_GF1 ("slot-unbound", obj
);
983 SCM_DEFINE (scm_at_assert_bound_ref
, "@assert-bound-ref", 2, 0, 0,
984 (SCM obj
, SCM index
),
985 "Like @code{assert-bound}, but use @var{index} for accessing\n"
986 "the value from @var{obj}.")
987 #define FUNC_NAME s_scm_at_assert_bound_ref
989 SCM value
= SCM_SLOT (obj
, SCM_INUM (index
));
990 if (SCM_GOOPS_UNBOUNDP (value
))
991 return CALL_GF1 ("slot-unbound", obj
);
996 SCM_DEFINE (scm_sys_fast_slot_ref
, "%fast-slot-ref", 2, 0, 0,
997 (SCM obj
, SCM index
),
998 "Return the slot value with index @var{index} from @var{obj}.")
999 #define FUNC_NAME s_scm_sys_fast_slot_ref
1003 SCM_VALIDATE_INSTANCE (1, obj
);
1004 SCM_VALIDATE_INUM (2, index
);
1005 i
= SCM_INUM (index
);
1007 SCM_ASSERT_RANGE (2, index
, i
>= 0 && i
< SCM_NUMBER_OF_SLOTS (obj
));
1008 return scm_at_assert_bound_ref (obj
, index
);
1012 SCM_DEFINE (scm_sys_fast_slot_set_x
, "%fast-slot-set!", 3, 0, 0,
1013 (SCM obj
, SCM index
, SCM value
),
1014 "Set the slot with index @var{index} in @var{obj} to\n"
1016 #define FUNC_NAME s_scm_sys_fast_slot_set_x
1020 SCM_VALIDATE_INSTANCE (1, obj
);
1021 SCM_VALIDATE_INUM (2, index
);
1022 i
= SCM_INUM (index
);
1023 SCM_ASSERT_RANGE (2, index
, i
>= 0 && i
< SCM_NUMBER_OF_SLOTS (obj
));
1024 SCM_SLOT (obj
, i
) = value
;
1026 return SCM_UNSPECIFIED
;
1033 /* In the future, this function will return the effective slot
1034 * definition associated with SLOT_NAME. Now it just returns some of
1035 * the information which will be stored in the effective slot
1040 slot_definition_using_name (SCM
class, SCM slot_name
)
1042 register SCM slots
= SCM_SLOT (class, scm_si_getters_n_setters
);
1043 for (; SCM_NIMP (slots
); slots
= SCM_CDR (slots
))
1044 if (SCM_CAAR (slots
) == slot_name
)
1045 return SCM_CAR (slots
);
1050 get_slot_value (SCM
class, SCM obj
, SCM slotdef
)
1052 SCM access
= SCM_CDDR (slotdef
);
1054 * - access is an integer (the offset of this slot in the slots vector)
1055 * - otherwise (car access) is the getter function to apply
1057 if (SCM_INUMP (access
))
1058 return SCM_SLOT (obj
, SCM_INUM (access
));
1061 /* We must evaluate (apply (car access) (list obj))
1062 * where (car access) is known to be a closure of arity 1 */
1063 register SCM code
, env
;
1065 code
= SCM_CAR (access
);
1066 if (!SCM_CLOSUREP (code
))
1067 return SCM_SUBRF (code
) (obj
);
1068 env
= SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (code
),
1071 /* Evaluate the closure body */
1072 return scm_eval_body (SCM_CDR (SCM_CODE (code
)), env
);
1077 get_slot_value_using_name (SCM
class, SCM obj
, SCM slot_name
)
1079 SCM slotdef
= slot_definition_using_name (class, slot_name
);
1080 if (SCM_NFALSEP (slotdef
))
1081 return get_slot_value (class, obj
, slotdef
);
1083 return CALL_GF3 ("slot-missing", class, obj
, slot_name
);
1087 set_slot_value (SCM
class, SCM obj
, SCM slotdef
, SCM value
)
1089 SCM access
= SCM_CDDR (slotdef
);
1091 * - access is an integer (the offset of this slot in the slots vector)
1092 * - otherwise (cadr access) is the setter function to apply
1094 if (SCM_INUMP (access
))
1095 SCM_SLOT (obj
, SCM_INUM (access
)) = value
;
1098 /* We must evaluate (apply (cadr l) (list obj value))
1099 * where (cadr l) is known to be a closure of arity 2 */
1100 register SCM code
, env
;
1102 code
= SCM_CADR (access
);
1103 if (!SCM_CLOSUREP (code
))
1104 SCM_SUBRF (code
) (obj
, value
);
1107 env
= SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (code
),
1108 SCM_LIST2 (obj
, value
),
1110 /* Evaluate the closure body */
1111 scm_eval_body (SCM_CDR (SCM_CODE (code
)), env
);
1114 return SCM_UNSPECIFIED
;
1118 set_slot_value_using_name (SCM
class, SCM obj
, SCM slot_name
, SCM value
)
1120 SCM slotdef
= slot_definition_using_name (class, slot_name
);
1121 if (SCM_NFALSEP (slotdef
))
1122 return set_slot_value (class, obj
, slotdef
, value
);
1124 return CALL_GF4 ("slot-missing", class, obj
, slot_name
, value
);
1128 test_slot_existence (SCM
class, SCM obj
, SCM slot_name
)
1132 for (l
= SCM_ACCESSORS_OF (obj
); SCM_NNULLP (l
); l
= SCM_CDR (l
))
1133 if (SCM_CAAR (l
) == slot_name
)
1139 /* ======================================== */
1141 SCM_DEFINE (scm_slot_ref_using_class
, "slot-ref-using-class", 3, 0, 0,
1142 (SCM
class, SCM obj
, SCM slot_name
),
1144 #define FUNC_NAME s_scm_slot_ref_using_class
1148 SCM_VALIDATE_CLASS (1, class);
1149 SCM_VALIDATE_INSTANCE (2, obj
);
1150 SCM_VALIDATE_SYMBOL (3, slot_name
);
1152 res
= get_slot_value_using_name (class, obj
, slot_name
);
1153 if (SCM_GOOPS_UNBOUNDP (res
))
1154 return CALL_GF3 ("slot-unbound", class, obj
, slot_name
);
1160 SCM_DEFINE (scm_slot_set_using_class_x
, "slot-set-using-class!", 4, 0, 0,
1161 (SCM
class, SCM obj
, SCM slot_name
, SCM value
),
1163 #define FUNC_NAME s_scm_slot_set_using_class_x
1165 SCM_VALIDATE_CLASS (1, class);
1166 SCM_VALIDATE_INSTANCE (2, obj
);
1167 SCM_VALIDATE_SYMBOL (3, slot_name
);
1169 return set_slot_value_using_name (class, obj
, slot_name
, value
);
1174 SCM_DEFINE (scm_slot_bound_using_class_p
, "slot-bound-using-class?", 3, 0, 0,
1175 (SCM
class, SCM obj
, SCM slot_name
),
1177 #define FUNC_NAME s_scm_slot_bound_using_class_p
1179 SCM_VALIDATE_CLASS (1, class);
1180 SCM_VALIDATE_INSTANCE (2, obj
);
1181 SCM_VALIDATE_SYMBOL (3, slot_name
);
1183 return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class, obj
, slot_name
))
1189 SCM_DEFINE (scm_slot_exists_using_class_p
, "slot-exists-using-class?", 3, 0, 0,
1190 (SCM
class, SCM obj
, SCM slot_name
),
1192 #define FUNC_NAME s_scm_slot_exists_using_class_p
1194 SCM_VALIDATE_CLASS (1, class);
1195 SCM_VALIDATE_INSTANCE (2, obj
);
1196 SCM_VALIDATE_SYMBOL (3, slot_name
);
1197 return test_slot_existence (class, obj
, slot_name
);
1202 /* ======================================== */
1204 SCM_DEFINE (scm_slot_ref
, "slot-ref", 2, 0, 0,
1205 (SCM obj
, SCM slot_name
),
1206 "Return the value from @var{obj}'s slot with the name\n"
1208 #define FUNC_NAME s_scm_slot_ref
1212 SCM_VALIDATE_INSTANCE (1, obj
);
1213 TEST_CHANGE_CLASS (obj
, class);
1215 res
= get_slot_value_using_name (class, obj
, slot_name
);
1216 if (SCM_GOOPS_UNBOUNDP (res
))
1217 return CALL_GF3 ("slot-unbound", class, obj
, slot_name
);
1222 SCM_DEFINE (scm_slot_set_x
, "slot-set!", 3, 0, 0,
1223 (SCM obj
, SCM slot_name
, SCM value
),
1224 "Set the slot named @var{slot_name} of @var{obj} to @var{value}.")
1225 #define FUNC_NAME s_scm_slot_set_x
1229 SCM_VALIDATE_INSTANCE (1, obj
);
1230 TEST_CHANGE_CLASS(obj
, class);
1232 return set_slot_value_using_name (class, obj
, slot_name
, value
);
1236 const char *scm_s_slot_set_x
= s_scm_slot_set_x
;
1238 SCM_DEFINE (scm_slot_bound_p
, "slot-bound?", 2, 0, 0,
1239 (SCM obj
, SCM slot_name
),
1240 "Return @code{#t} if the slot named @var{slot_name} of @var{obj}\n"
1242 #define FUNC_NAME s_scm_slot_bound_p
1246 SCM_VALIDATE_INSTANCE (1, obj
);
1247 TEST_CHANGE_CLASS(obj
, class);
1249 return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class,
1257 SCM_DEFINE (scm_slots_exists_p
, "slot-exists?", 2, 0, 0,
1258 (SCM obj
, SCM slot_name
),
1259 "Return @code{#t} if @var{obj} has a slot named @var{slot_name}.")
1260 #define FUNC_NAME s_scm_slots_exists_p
1264 SCM_VALIDATE_INSTANCE (1, obj
);
1265 SCM_VALIDATE_SYMBOL (2, slot_name
);
1266 TEST_CHANGE_CLASS (obj
, class);
1268 return test_slot_existence (class, obj
, slot_name
);
1273 /******************************************************************************
1275 * %allocate-instance (the low level instance allocation primitive)
1277 ******************************************************************************/
1279 static void clear_method_cache (SCM
);
1282 wrap_init (SCM
class, SCM
*m
, int n
)
1287 /* Set all slots to unbound */
1288 for (i
= 0; i
< n
; i
++)
1289 m
[i
] = SCM_GOOPS_UNBOUND
;
1292 SCM_SETCDR (z
, (SCM
) m
);
1293 SCM_SET_STRUCT_GC_CHAIN (z
, 0);
1294 SCM_SETCAR (z
, (scm_bits_t
) SCM_STRUCT_DATA (class) | scm_tc3_cons_gloc
);
1299 SCM_DEFINE (scm_sys_allocate_instance
, "%allocate-instance", 2, 0, 0,
1300 (SCM
class, SCM initargs
),
1301 "Create a new instance of class @var{class} and initialize it\n"
1302 "from the arguments @var{initargs}.")
1303 #define FUNC_NAME s_scm_sys_allocate_instance
1308 SCM_VALIDATE_CLASS (1, class);
1310 /* Most instances */
1311 if (SCM_CLASS_FLAGS (class) & SCM_STRUCTF_LIGHT
)
1313 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1314 m
= (SCM
*) scm_must_malloc (n
* sizeof (SCM
), "instance");
1315 return wrap_init (class, m
, n
);
1318 /* Foreign objects */
1319 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_FOREIGN
)
1320 return scm_make_foreign_object (class, initargs
);
1322 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1325 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_ENTITY
)
1327 m
= (SCM
*) scm_alloc_struct (n
,
1328 scm_struct_entity_n_extra_words
,
1330 m
[scm_struct_i_setter
] = SCM_BOOL_F
;
1331 m
[scm_struct_i_procedure
] = SCM_BOOL_F
;
1332 /* Generic functions */
1333 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_PURE_GENERIC
)
1335 SCM gf
= wrap_init (class, m
, n
);
1336 clear_method_cache (gf
);
1340 return wrap_init (class, m
, n
);
1344 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_METACLASS
)
1348 /* allocate class object */
1349 SCM z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
1351 SCM_SLOT (z
, scm_si_print
) = SCM_GOOPS_UNBOUND
;
1352 for (i
= scm_si_goops_fields
; i
< n
; i
++)
1353 SCM_SLOT (z
, i
) = SCM_GOOPS_UNBOUND
;
1355 if (SCM_SUBCLASSP (class, scm_class_entity_class
))
1356 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
| SCM_CLASSF_ENTITY
);
1357 else if (SCM_SUBCLASSP (class, scm_class_operator_class
))
1358 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
);
1363 /* Non-light instances */
1365 m
= (SCM
*) scm_alloc_struct (n
,
1366 scm_struct_n_extra_words
,
1368 return wrap_init (class, m
, n
);
1373 SCM_DEFINE (scm_sys_set_object_setter_x
, "%set-object-setter!", 2, 0, 0,
1374 (SCM obj
, SCM setter
),
1376 #define FUNC_NAME s_scm_sys_set_object_setter_x
1378 SCM_ASSERT (SCM_STRUCTP (obj
)
1379 && ((SCM_CLASS_FLAGS (obj
) & SCM_CLASSF_OPERATOR
)
1380 || SCM_I_ENTITYP (obj
)),
1384 if (SCM_I_ENTITYP (obj
))
1385 SCM_SET_ENTITY_SETTER (obj
, setter
);
1387 SCM_OPERATOR_CLASS (obj
)->setter
= setter
;
1388 return SCM_UNSPECIFIED
;
1392 /******************************************************************************
1394 * %modify-instance (used by change-class to modify in place)
1396 ******************************************************************************/
1398 SCM_DEFINE (scm_sys_modify_instance
, "%modify-instance", 2, 0, 0,
1401 #define FUNC_NAME s_scm_sys_modify_instance
1403 SCM_VALIDATE_INSTANCE (1, old
);
1404 SCM_VALIDATE_INSTANCE (2, new);
1406 /* Exchange the data contained in old and new. We exchange rather than
1407 * scratch the old value with new to be correct with GC.
1408 * See "Class redefinition protocol above".
1412 SCM car
= SCM_CAR (old
);
1413 SCM cdr
= SCM_CDR (old
);
1414 SCM_SETCAR (old
, SCM_CAR (new));
1415 SCM_SETCDR (old
, SCM_CDR (new));
1416 SCM_SETCAR (new, car
);
1417 SCM_SETCDR (new, cdr
);
1420 return SCM_UNSPECIFIED
;
1424 SCM_DEFINE (scm_sys_modify_class
, "%modify-class", 2, 0, 0,
1427 #define FUNC_NAME s_scm_sys_modify_class
1429 SCM_VALIDATE_CLASS (1, old
);
1430 SCM_VALIDATE_CLASS (2, new);
1434 SCM car
= SCM_CAR (old
);
1435 SCM cdr
= SCM_CDR (old
);
1436 SCM_SETCAR (old
, SCM_CAR (new));
1437 SCM_SETCDR (old
, SCM_CDR (new));
1438 SCM_STRUCT_DATA (old
)[scm_vtable_index_vtable
] = old
;
1439 SCM_SETCAR (new, car
);
1440 SCM_SETCDR (new, cdr
);
1441 SCM_STRUCT_DATA (new)[scm_vtable_index_vtable
] = new;
1444 return SCM_UNSPECIFIED
;
1448 SCM_DEFINE (scm_sys_invalidate_class
, "%invalidate-class", 1, 0, 0,
1451 #define FUNC_NAME s_scm_sys_invalidate_class
1453 SCM_VALIDATE_CLASS (1, class);
1454 SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID
);
1455 return SCM_UNSPECIFIED
;
1459 /* When instances change class, they finally get a new body, but
1460 * before that, they go through purgatory in hell. Odd as it may
1461 * seem, this data structure saves us from eternal suffering in
1462 * infinite recursions.
1466 static int n_hell
= 1; /* one place for the evil one himself */
1467 static int hell_size
= 4;
1469 static scm_mutex_t hell_mutex
;
1476 for (i
= 1; i
< n_hell
; ++i
)
1477 if (SCM_INST (o
) == hell
[i
])
1483 go_to_hell (void *o
)
1487 scm_mutex_lock (&hell_mutex
);
1489 if (n_hell
== hell_size
)
1491 int new_size
= 2 * hell_size
;
1492 hell
= scm_must_realloc (hell
, hell_size
, new_size
, "hell");
1493 hell_size
= new_size
;
1495 hell
[n_hell
++] = SCM_INST (obj
);
1497 scm_mutex_unlock (&hell_mutex
);
1502 go_to_heaven (void *o
)
1505 scm_mutex_lock (&hell_mutex
);
1507 hell
[burnin ((SCM
) o
)] = hell
[--n_hell
];
1509 scm_mutex_unlock (&hell_mutex
);
1514 purgatory (void *args
)
1516 return scm_apply (GETVAR (scm_str2symbol ("change-class")), (SCM
) args
, SCM_EOL
);
1520 scm_change_object_class (SCM obj
, SCM old_class
, SCM new_class
)
1523 scm_internal_dynamic_wind (go_to_hell
, purgatory
, go_to_heaven
,
1524 (void *) SCM_LIST2 (obj
, new_class
),
1528 /******************************************************************************
1534 * GGG E N E R I C F U N C T I O N S
1536 * This implementation provides
1537 * - generic functions (with class specializers)
1540 * - a hard-coded MOP for standard gf, which can be overloaded for non-std gf
1542 ******************************************************************************/
1544 SCM_KEYWORD (k_name
, "name");
1546 SCM_SYMBOL (sym_no_method
, "no-method");
1548 static SCM list_of_no_method
;
1550 SCM_SYMBOL (scm_sym_args
, "args");
1553 scm_make_method_cache (SCM gf
)
1555 return SCM_LIST5 (SCM_IM_DISPATCH
, scm_sym_args
, SCM_MAKINUM (1),
1556 scm_c_make_vector (SCM_INITIAL_MCACHE_SIZE
,
1562 clear_method_cache (SCM gf
)
1564 SCM cache
= scm_make_method_cache (gf
);
1565 SCM_SET_ENTITY_PROCEDURE (gf
, cache
);
1566 SCM_SLOT (gf
, scm_si_used_by
) = SCM_BOOL_F
;
1569 SCM_DEFINE (scm_sys_invalidate_method_cache_x
, "%invalidate-method-cache!", 1, 0, 0,
1572 #define FUNC_NAME s_scm_sys_invalidate_method_cache_x
1575 SCM_ASSERT (SCM_PUREGENERICP (gf
), gf
, SCM_ARG1
, FUNC_NAME
);
1576 used_by
= SCM_SLOT (gf
, scm_si_used_by
);
1577 if (SCM_NFALSEP (used_by
))
1579 SCM methods
= SCM_SLOT (gf
, scm_si_methods
);
1580 for (; SCM_CONSP (used_by
); used_by
= SCM_CDR (used_by
))
1581 scm_sys_invalidate_method_cache_x (SCM_CAR (used_by
));
1582 clear_method_cache (gf
);
1583 for (; SCM_CONSP (methods
); methods
= SCM_CDR (methods
))
1584 SCM_SLOT (SCM_CAR (methods
), scm_si_code_table
) = SCM_EOL
;
1587 SCM n
= SCM_SLOT (gf
, scm_si_n_specialized
);
1588 /* The sign of n is a flag indicating rest args. */
1589 SCM_SET_MCACHE_N_SPECIALIZED (SCM_ENTITY_PROCEDURE (gf
), n
);
1591 return SCM_UNSPECIFIED
;
1595 SCM_DEFINE (scm_generic_capability_p
, "generic-capability?", 1, 0, 0,
1598 #define FUNC_NAME s_scm_generic_capability_p
1600 SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (proc
)),
1601 proc
, SCM_ARG1
, FUNC_NAME
);
1602 return (scm_subr_p (proc
) && SCM_SUBR_GENERIC (proc
)
1608 SCM_DEFINE (scm_enable_primitive_generic_x
, "enable-primitive-generic!", 0, 0, 1,
1611 #define FUNC_NAME s_scm_enable_primitive_generic_x
1613 while (SCM_NIMP (subrs
))
1615 SCM subr
= SCM_CAR (subrs
);
1616 SCM_ASSERT (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
),
1617 subr
, SCM_ARGn
, FUNC_NAME
);
1618 *SCM_SUBR_GENERIC (subr
)
1619 = scm_make (SCM_LIST3 (scm_class_generic
,
1622 subrs
= SCM_CDR (subrs
);
1624 return SCM_UNSPECIFIED
;
1628 SCM_DEFINE (scm_primitive_generic_generic
, "primitive-generic-generic", 1, 0, 0,
1631 #define FUNC_NAME s_scm_primitive_generic_generic
1633 if (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
))
1635 SCM gf
= *SCM_SUBR_GENERIC (subr
);
1639 SCM_WRONG_TYPE_ARG (SCM_ARG1
, subr
);
1643 /******************************************************************************
1645 * Protocol for calling a generic fumction
1646 * This protocol is roughly equivalent to (parameter are a little bit different
1647 * for efficiency reasons):
1649 * + apply-generic (gf args)
1650 * + compute-applicable-methods (gf args ...)
1651 * + sort-applicable-methods (methods args)
1652 * + apply-methods (gf methods args)
1654 * apply-methods calls make-next-method to build the "continuation" of a a
1655 * method. Applying a next-method will call apply-next-method which in
1656 * turn will call apply again to call effectively the following method.
1658 ******************************************************************************/
1661 applicablep (SCM actual
, SCM formal
)
1663 /* We already know that the cpl is well formed. */
1664 return !SCM_FALSEP (scm_c_memq (formal
, SCM_SLOT (actual
, scm_si_cpl
)));
1668 more_specificp (SCM m1
, SCM m2
, SCM
*targs
)
1670 register SCM s1
, s2
;
1674 * m1 and m2 can have != length (i.e. one can be one element longer than the
1675 * other when we have a dotted parameter list). For instance, with the call
1678 * (define-method M (a . l) ....)
1679 * (define-method M (a) ....)
1681 * we consider that the second method is more specific.
1683 * BTW, targs is an array of types. We don't need it's size since
1684 * we already know that m1 and m2 are applicable (no risk to go past
1685 * the end of this array).
1688 for (i
=0,s1
=SPEC_OF(m1
),s2
=SPEC_OF(m2
); ; i
++,s1
=SCM_CDR(s1
),s2
=SCM_CDR(s2
)) {
1689 if (SCM_NULLP(s1
)) return 1;
1690 if (SCM_NULLP(s2
)) return 0;
1691 if (SCM_CAR(s1
) != SCM_CAR(s2
)) {
1692 register SCM l
, cs1
= SCM_CAR(s1
), cs2
= SCM_CAR(s2
);
1694 for (l
= SCM_SLOT(targs
[i
], scm_si_cpl
); ; l
= SCM_CDR(l
)) {
1695 if (cs1
== SCM_CAR(l
))
1697 if (cs2
== SCM_CAR(l
))
1700 return 0;/* should not occur! */
1703 return 0; /* should not occur! */
1706 #define BUFFSIZE 32 /* big enough for most uses */
1709 scm_i_vector2list (SCM l
, int len
)
1712 SCM z
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1714 for (j
= 0; j
< len
; j
++, l
= SCM_CDR (l
)) {
1715 SCM_VELTS (z
)[j
] = SCM_CAR (l
);
1721 sort_applicable_methods (SCM method_list
, int size
, SCM
*targs
)
1724 SCM
*v
, vector
= SCM_EOL
;
1725 SCM buffer
[BUFFSIZE
];
1726 SCM save
= method_list
;
1728 /* For reasonably sized method_lists we can try to avoid all the
1729 * consing and reorder the list in place...
1730 * This idea is due to David McClain <Dave_McClain@msn.com>
1732 if (size
<= BUFFSIZE
)
1734 for (i
= 0; i
< size
; i
++)
1736 buffer
[i
] = SCM_CAR (method_list
);
1737 method_list
= SCM_CDR (method_list
);
1743 /* Too many elements in method_list to keep everything locally */
1744 vector
= scm_i_vector2list (save
, size
);
1745 v
= SCM_VELTS (vector
);
1748 /* Use a simple shell sort since it is generally faster than qsort on
1749 * small vectors (which is probably mostly the case when we have to
1750 * sort a list of applicable methods).
1752 for (incr
= size
/ 2; incr
; incr
/= 2)
1754 for (i
= incr
; i
< size
; i
++)
1756 for (j
= i
- incr
; j
>= 0; j
-= incr
)
1758 if (more_specificp (v
[j
], v
[j
+incr
], targs
))
1762 SCM tmp
= v
[j
+ incr
];
1770 if (size
<= BUFFSIZE
)
1772 /* We did it in locally, so restore the original list (reordered) in-place */
1773 for (i
= 0, method_list
= save
; i
< size
; i
++, v
++)
1775 SCM_SETCAR (method_list
, *v
);
1776 method_list
= SCM_CDR (method_list
);
1780 /* If we are here, that's that we did it the hard way... */
1781 return scm_vector_to_list (vector
);
1785 scm_compute_applicable_methods (SCM gf
, SCM args
, int len
, int find_method_p
)
1789 SCM l
, fl
, applicable
= SCM_EOL
;
1791 SCM buffer
[BUFFSIZE
], *types
, *p
;
1794 /* Build the list of arguments types */
1795 if (len
>= BUFFSIZE
) {
1796 tmp
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1797 /* NOTE: Using pointers to malloced memory won't work if we
1798 1. have preemtive threading, and,
1799 2. have a GC which moves objects. */
1800 types
= p
= SCM_VELTS(tmp
);
1805 for ( ; SCM_NNULLP (args
); args
= SCM_CDR (args
))
1806 *p
++ = scm_class_of (SCM_CAR (args
));
1808 /* Build a list of all applicable methods */
1809 for (l
= SCM_SLOT (gf
, scm_si_methods
); SCM_NNULLP (l
); l
= SCM_CDR (l
))
1811 fl
= SPEC_OF (SCM_CAR (l
));
1812 /* Only accept accessors which match exactly in first arg. */
1813 if (SCM_ACCESSORP (SCM_CAR (l
))
1814 && (SCM_IMP (fl
) || types
[0] != SCM_CAR (fl
)))
1816 for (i
= 0; ; i
++, fl
= SCM_CDR (fl
))
1818 if (SCM_INSTANCEP (fl
)
1819 /* We have a dotted argument list */
1820 || (i
>= len
&& SCM_NULLP (fl
)))
1821 { /* both list exhausted */
1822 applicable
= scm_cons (SCM_CAR (l
), applicable
);
1828 || !applicablep (types
[i
], SCM_CAR (fl
)))
1837 CALL_GF2 ("no-applicable-method", gf
, save
);
1838 /* if we are here, it's because no-applicable-method hasn't signaled an error */
1843 : sort_applicable_methods (applicable
, count
, types
));
1847 SCM_PROC (s_sys_compute_applicable_methods
, "%compute-applicable-methods", 2, 0, 0, scm_sys_compute_applicable_methods
);
1850 static const char s_sys_compute_applicable_methods
[] = "%compute-applicable-methods";
1853 scm_sys_compute_applicable_methods (SCM gf
, SCM args
)
1854 #define FUNC_NAME s_sys_compute_applicable_methods
1857 SCM_VALIDATE_GENERIC (1, gf
);
1858 n
= scm_ilength (args
);
1859 SCM_ASSERT (n
>= 0, args
, SCM_ARG2
, FUNC_NAME
);
1860 return scm_compute_applicable_methods (gf
, args
, n
, 1);
1864 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
));
1866 SCM_SYNTAX (s_atslot_ref
, "@slot-ref", scm_makmmacro
, scm_m_atslot_ref
);
1869 scm_m_atslot_ref (SCM xorig
, SCM env
)
1870 #define FUNC_NAME s_atslot_ref
1872 SCM x
= SCM_CDR (xorig
);
1873 SCM_ASSYNT (scm_ilength (x
) == 2, scm_s_expression
, FUNC_NAME
);
1874 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1875 return scm_cons (SCM_IM_SLOT_REF
, x
);
1880 SCM_SYNTAX (s_atslot_set_x
, "@slot-set!", scm_makmmacro
, scm_m_atslot_set_x
);
1883 scm_m_atslot_set_x (SCM xorig
, SCM env
)
1884 #define FUNC_NAME s_atslot_set_x
1886 SCM x
= SCM_CDR (xorig
);
1887 SCM_ASSYNT (scm_ilength (x
) == 3, scm_s_expression
, FUNC_NAME
);
1888 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1889 return scm_cons (SCM_IM_SLOT_SET_X
, x
);
1894 SCM_SYNTAX (s_atdispatch
, "@dispatch", scm_makmmacro
, scm_m_atdispatch
);
1896 SCM_SYMBOL (sym_atdispatch
, s_atdispatch
);
1899 scm_m_atdispatch (SCM xorig
, SCM env
)
1900 #define FUNC_NAME s_atdispatch
1902 SCM args
, n
, v
, gf
, x
= SCM_CDR (xorig
);
1903 SCM_ASSYNT (scm_ilength (x
) == 4, scm_s_expression
, FUNC_NAME
);
1905 if (!SCM_CONSP (args
) && !SCM_SYMBOLP (args
))
1906 SCM_WRONG_TYPE_ARG (SCM_ARG1
, args
);
1908 n
= SCM_XEVALCAR (x
, env
);
1909 SCM_VALIDATE_INUM (SCM_ARG2
, n
);
1910 SCM_ASSERT_RANGE (0, n
, SCM_INUM (n
) >= 1);
1912 v
= SCM_XEVALCAR (x
, env
);
1913 SCM_VALIDATE_VECTOR (SCM_ARG3
, v
);
1915 gf
= SCM_XEVALCAR (x
, env
);
1916 SCM_VALIDATE_PUREGENERIC (SCM_ARG4
, gf
);
1917 return SCM_LIST5 (SCM_IM_DISPATCH
, args
, n
, v
, gf
);
1924 lock_cache_mutex (void *m
)
1926 SCM mutex
= (SCM
) m
;
1927 scm_lock_mutex (mutex
);
1931 unlock_cache_mutex (void *m
)
1933 SCM mutex
= (SCM
) m
;
1934 scm_unlock_mutex (mutex
);
1939 call_memoize_method (void *a
)
1942 SCM gf
= SCM_CAR (args
);
1943 SCM x
= SCM_CADR (args
);
1944 /* First check if another thread has inserted a method between
1945 * the cache miss and locking the mutex.
1947 SCM cmethod
= scm_mcache_lookup_cmethod (x
, SCM_CDDR (args
));
1948 if (SCM_NIMP (cmethod
))
1950 /*fixme* Use scm_apply */
1951 return CALL_GF3 ("memoize-method!", gf
, SCM_CDDR (args
), x
);
1955 scm_memoize_method (SCM x
, SCM args
)
1957 SCM gf
= SCM_CAR (scm_last_pair (x
));
1959 return scm_internal_dynamic_wind (lock_cache_mutex
,
1960 call_memoize_method
,
1962 (void *) scm_cons2 (gf
, x
, args
),
1963 (void *) SCM_SLOT (gf
, scm_si_cache_mutex
));
1965 return call_memoize_method ((void *) scm_cons2 (gf
, x
, args
));
1969 /******************************************************************************
1971 * A simple make (which will be redefined later in Scheme)
1972 * This version handles only creation of gf, methods and classes (no instances)
1974 * Since this code will disappear when Goops will be fully booted,
1975 * no precaution is taken to be efficient.
1977 ******************************************************************************/
1979 SCM_KEYWORD (k_setter
, "setter");
1980 SCM_KEYWORD (k_specializers
, "specializers");
1981 SCM_KEYWORD (k_procedure
, "procedure");
1982 SCM_KEYWORD (k_dsupers
, "dsupers");
1983 SCM_KEYWORD (k_slots
, "slots");
1984 SCM_KEYWORD (k_gf
, "generic-function");
1986 SCM_DEFINE (scm_make
, "make", 0, 0, 1,
1988 "Make a new object. @var{args} must contain the class and\n"
1989 "all necessary initialization information.")
1990 #define FUNC_NAME s_scm_make
1993 int len
= scm_ilength (args
);
1995 if (len
<= 0 || (len
& 1) == 0)
1996 SCM_WRONG_NUM_ARGS ();
1998 class = SCM_CAR(args
);
1999 args
= SCM_CDR(args
);
2001 if (class == scm_class_generic
|| class == scm_class_generic_with_setter
)
2004 z
= scm_make_struct (class, SCM_INUM0
,
2008 scm_make_mutex ()));
2010 z
= scm_make_struct (class, SCM_INUM0
,
2011 SCM_LIST3 (SCM_EOL
, SCM_INUM0
, SCM_BOOL_F
));
2013 scm_set_procedure_property_x (z
, scm_sym_name
,
2014 scm_get_keyword (k_name
,
2017 clear_method_cache (z
);
2018 if (class == scm_class_generic_with_setter
)
2020 SCM setter
= scm_get_keyword (k_setter
, args
, SCM_BOOL_F
);
2021 if (SCM_NIMP (setter
))
2022 scm_sys_set_object_setter_x (z
, setter
);
2027 z
= scm_sys_allocate_instance (class, args
);
2029 if (class == scm_class_method
2030 || class == scm_class_simple_method
2031 || class == scm_class_accessor
)
2033 SCM_SLOT (z
, scm_si_generic_function
) =
2034 scm_i_get_keyword (k_gf
,
2039 SCM_SLOT (z
, scm_si_specializers
) =
2040 scm_i_get_keyword (k_specializers
,
2045 SCM_SLOT (z
, scm_si_procedure
) =
2046 scm_i_get_keyword (k_procedure
,
2051 SCM_SLOT (z
, scm_si_code_table
) = SCM_EOL
;
2055 /* In all the others case, make a new class .... No instance here */
2056 SCM_SLOT (z
, scm_si_name
) =
2057 scm_i_get_keyword (k_name
,
2060 scm_str2symbol ("???"),
2062 SCM_SLOT (z
, scm_si_direct_supers
) =
2063 scm_i_get_keyword (k_dsupers
,
2068 SCM_SLOT (z
, scm_si_direct_slots
) =
2069 scm_i_get_keyword (k_slots
,
2080 SCM_DEFINE (scm_find_method
, "find-method", 0, 0, 1,
2083 #define FUNC_NAME s_scm_find_method
2086 int len
= scm_ilength (l
);
2089 SCM_WRONG_NUM_ARGS ();
2091 gf
= SCM_CAR(l
); l
= SCM_CDR(l
);
2092 SCM_VALIDATE_GENERIC (1, gf
);
2093 if (SCM_NULLP (SCM_SLOT (gf
, scm_si_methods
)))
2094 SCM_MISC_ERROR ("no methods for generic ~S", SCM_LIST1 (gf
));
2096 return scm_compute_applicable_methods (gf
, l
, len
- 1, 1);
2100 SCM_DEFINE (scm_sys_method_more_specific_p
, "%method-more-specific?", 3, 0, 0,
2101 (SCM m1
, SCM m2
, SCM targs
),
2103 #define FUNC_NAME s_scm_sys_method_more_specific_p
2108 SCM_VALIDATE_METHOD (1, m1
);
2109 SCM_VALIDATE_METHOD (2, m2
);
2110 SCM_ASSERT ((len
= scm_ilength (targs
)) != -1, targs
, SCM_ARG3
, FUNC_NAME
);
2112 /* Verify that all the arguments of targs are classes and place them in a vector*/
2113 v
= scm_c_make_vector (len
, SCM_EOL
);
2115 for (i
=0, l
=targs
; SCM_NNULLP(l
); i
++, l
=SCM_CDR(l
)) {
2116 SCM_ASSERT (SCM_CLASSP (SCM_CAR (l
)), targs
, SCM_ARG3
, FUNC_NAME
);
2117 SCM_VELTS(v
)[i
] = SCM_CAR(l
);
2119 return more_specificp (m1
, m2
, SCM_VELTS(v
)) ? SCM_BOOL_T
: SCM_BOOL_F
;
2125 /******************************************************************************
2129 ******************************************************************************/
2133 make_stdcls (SCM
*var
, char *name
, SCM meta
, SCM super
, SCM slots
)
2135 SCM tmp
= scm_str2symbol (name
);
2137 *var
= scm_permanent_object (scm_basic_make_class (meta
,
2141 : SCM_LIST1 (super
),
2147 SCM_KEYWORD (k_slot_definition
, "slot-definition");
2150 create_standard_classes (void)
2153 SCM method_slots
= SCM_LIST4 (scm_str2symbol ("generic-function"),
2154 scm_str2symbol ("specializers"),
2155 scm_str2symbol ("procedure"),
2156 scm_str2symbol ("code-table"));
2157 SCM amethod_slots
= SCM_LIST1 (SCM_LIST3 (scm_str2symbol ("slot-definition"),
2159 k_slot_definition
));
2161 SCM mutex_slot
= SCM_LIST1 (scm_str2symbol ("make-mutex"));
2163 SCM mutex_slot
= SCM_BOOL_F
;
2165 SCM gf_slots
= SCM_LIST4 (scm_str2symbol ("methods"),
2166 SCM_LIST3 (scm_str2symbol ("n-specialized"),
2169 SCM_LIST3 (scm_str2symbol ("used-by"),
2172 SCM_LIST3 (scm_str2symbol ("cache-mutex"),
2174 scm_closure (SCM_LIST2 (SCM_EOL
,
2178 /* Foreign class slot classes */
2179 make_stdcls (&scm_class_foreign_slot
, "<foreign-slot>",
2180 scm_class_class
, scm_class_top
, SCM_EOL
);
2181 make_stdcls (&scm_class_protected
, "<protected-slot>",
2182 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2183 make_stdcls (&scm_class_opaque
, "<opaque-slot>",
2184 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2185 make_stdcls (&scm_class_read_only
, "<read-only-slot>",
2186 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2187 make_stdcls (&scm_class_self
, "<self-slot>",
2189 SCM_LIST2 (scm_class_foreign_slot
, scm_class_read_only
),
2191 make_stdcls (&scm_class_protected_opaque
, "<protected-opaque-slot>",
2193 SCM_LIST2 (scm_class_protected
, scm_class_opaque
),
2195 make_stdcls (&scm_class_protected_read_only
, "<protected-read-only-slot>",
2197 SCM_LIST2 (scm_class_protected
, scm_class_read_only
),
2199 make_stdcls (&scm_class_scm
, "<scm-slot>",
2200 scm_class_class
, scm_class_protected
, SCM_EOL
);
2201 make_stdcls (&scm_class_int
, "<int-slot>",
2202 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2203 make_stdcls (&scm_class_float
, "<float-slot>",
2204 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2205 make_stdcls (&scm_class_double
, "<double-slot>",
2206 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2208 /* Continue initialization of class <class> */
2210 slots
= build_class_class_slots ();
2211 SCM_SLOT (scm_class_class
, scm_si_direct_slots
) = slots
;
2212 SCM_SLOT (scm_class_class
, scm_si_slots
) = slots
;
2213 SCM_SLOT (scm_class_class
, scm_si_getters_n_setters
)
2214 = compute_getters_n_setters (slots
);
2216 make_stdcls (&scm_class_foreign_class
, "<foreign-class>",
2217 scm_class_class
, scm_class_class
,
2218 SCM_LIST2 (SCM_LIST3 (scm_str2symbol ("constructor"),
2221 SCM_LIST3 (scm_str2symbol ("destructor"),
2223 scm_class_opaque
)));
2224 make_stdcls (&scm_class_foreign_object
, "<foreign-object>",
2225 scm_class_foreign_class
, scm_class_object
, SCM_EOL
);
2226 SCM_SET_CLASS_FLAGS (scm_class_foreign_object
, SCM_CLASSF_FOREIGN
);
2228 /* scm_class_generic functions classes */
2229 make_stdcls (&scm_class_procedure_class
, "<procedure-class>",
2230 scm_class_class
, scm_class_class
, SCM_EOL
);
2231 make_stdcls (&scm_class_entity_class
, "<entity-class>",
2232 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2233 make_stdcls (&scm_class_operator_class
, "<operator-class>",
2234 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2235 make_stdcls (&scm_class_operator_with_setter_class
,
2236 "<operator-with-setter-class>",
2237 scm_class_class
, scm_class_operator_class
, SCM_EOL
);
2238 make_stdcls (&scm_class_method
, "<method>",
2239 scm_class_class
, scm_class_object
, method_slots
);
2240 make_stdcls (&scm_class_simple_method
, "<simple-method>",
2241 scm_class_class
, scm_class_method
, SCM_EOL
);
2242 SCM_SET_CLASS_FLAGS (scm_class_simple_method
, SCM_CLASSF_SIMPLE_METHOD
);
2243 make_stdcls (&scm_class_accessor
, "<accessor-method>",
2244 scm_class_class
, scm_class_simple_method
, amethod_slots
);
2245 SCM_SET_CLASS_FLAGS (scm_class_accessor
, SCM_CLASSF_ACCESSOR_METHOD
);
2246 make_stdcls (&scm_class_entity
, "<entity>",
2247 scm_class_entity_class
, scm_class_object
, SCM_EOL
);
2248 make_stdcls (&scm_class_entity_with_setter
, "<entity-with-setter>",
2249 scm_class_entity_class
, scm_class_entity
, SCM_EOL
);
2250 make_stdcls (&scm_class_generic
, "<generic>",
2251 scm_class_entity_class
, scm_class_entity
, gf_slots
);
2252 SCM_SET_CLASS_FLAGS (scm_class_generic
, SCM_CLASSF_PURE_GENERIC
);
2253 make_stdcls (&scm_class_generic_with_setter
, "<generic-with-setter>",
2254 scm_class_entity_class
,
2255 SCM_LIST2 (scm_class_generic
, scm_class_entity_with_setter
),
2258 /* Patch cpl since compute_cpl doesn't support multiple inheritance. */
2259 SCM_SLOT (scm_class_generic_with_setter
, scm_si_cpl
) =
2260 scm_append (SCM_LIST3 (SCM_LIST2 (scm_class_generic_with_setter
,
2262 SCM_SLOT (scm_class_entity_with_setter
,
2266 SCM_SET_CLASS_FLAGS (scm_class_generic_with_setter
, SCM_CLASSF_PURE_GENERIC
);
2268 /* Primitive types classes */
2269 make_stdcls (&scm_class_boolean
, "<boolean>",
2270 scm_class_class
, scm_class_top
, SCM_EOL
);
2271 make_stdcls (&scm_class_char
, "<char>",
2272 scm_class_class
, scm_class_top
, SCM_EOL
);
2273 make_stdcls (&scm_class_list
, "<list>",
2274 scm_class_class
, scm_class_top
, SCM_EOL
);
2275 make_stdcls (&scm_class_pair
, "<pair>",
2276 scm_class_class
, scm_class_list
, SCM_EOL
);
2277 make_stdcls (&scm_class_null
, "<null>",
2278 scm_class_class
, scm_class_list
, SCM_EOL
);
2279 make_stdcls (&scm_class_string
, "<string>",
2280 scm_class_class
, scm_class_top
, SCM_EOL
);
2281 make_stdcls (&scm_class_symbol
, "<symbol>",
2282 scm_class_class
, scm_class_top
, SCM_EOL
);
2283 make_stdcls (&scm_class_vector
, "<vector>",
2284 scm_class_class
, scm_class_top
, SCM_EOL
);
2285 make_stdcls (&scm_class_number
, "<number>",
2286 scm_class_class
, scm_class_top
, SCM_EOL
);
2287 make_stdcls (&scm_class_complex
, "<complex>",
2288 scm_class_class
, scm_class_number
, SCM_EOL
);
2289 make_stdcls (&scm_class_real
, "<real>",
2290 scm_class_class
, scm_class_complex
, SCM_EOL
);
2291 make_stdcls (&scm_class_integer
, "<integer>",
2292 scm_class_class
, scm_class_real
, SCM_EOL
);
2293 make_stdcls (&scm_class_keyword
, "<keyword>",
2294 scm_class_class
, scm_class_top
, SCM_EOL
);
2295 make_stdcls (&scm_class_unknown
, "<unknown>",
2296 scm_class_class
, scm_class_top
, SCM_EOL
);
2297 make_stdcls (&scm_class_procedure
, "<procedure>",
2298 scm_class_procedure_class
, scm_class_top
, SCM_EOL
);
2299 make_stdcls (&scm_class_procedure_with_setter
, "<procedure-with-setter>",
2300 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2301 make_stdcls (&scm_class_primitive_generic
, "<primitive-generic>",
2302 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2303 make_stdcls (&scm_class_port
, "<port>",
2304 scm_class_class
, scm_class_top
, SCM_EOL
);
2305 make_stdcls (&scm_class_input_port
, "<input-port>",
2306 scm_class_class
, scm_class_port
, SCM_EOL
);
2307 make_stdcls (&scm_class_output_port
, "<output-port>",
2308 scm_class_class
, scm_class_port
, SCM_EOL
);
2309 make_stdcls (&scm_class_input_output_port
, "<input-output-port>",
2311 SCM_LIST2 (scm_class_input_port
, scm_class_output_port
),
2315 /**********************************************************************
2319 **********************************************************************/
2322 make_class_from_template (char *template, char *type_name
, SCM supers
)
2328 sprintf (buffer
, template, type_name
);
2329 name
= scm_str2symbol (buffer
);
2332 name
= SCM_GOOPS_UNBOUND
;
2334 class = scm_permanent_object (scm_basic_make_class (scm_class_class
,
2339 /* Only define name if doesn't already exist. */
2340 if (!SCM_GOOPS_UNBOUNDP (name
)
2341 && SCM_FALSEP (scm_apply (scm_goops_lookup_closure
,
2342 SCM_LIST2 (name
, SCM_BOOL_F
),
2344 DEFVAR (name
, class);
2349 scm_make_extended_class (char *type_name
)
2351 return make_class_from_template ("<%s>",
2353 SCM_LIST1 (scm_class_top
));
2357 create_smob_classes (void)
2361 scm_smob_class
= (SCM
*) malloc (255 * sizeof (SCM
));
2362 for (i
= 0; i
< 255; ++i
)
2363 scm_smob_class
[i
] = 0;
2365 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_big
)] = scm_class_integer
;
2366 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_real
)] = scm_class_real
;
2367 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_complex
)] = scm_class_complex
;
2368 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_keyword
)] = scm_class_keyword
;
2370 for (i
= 0; i
< scm_numsmob
; ++i
)
2371 if (!scm_smob_class
[i
])
2372 scm_smob_class
[i
] = scm_make_extended_class (SCM_SMOBNAME (i
));
2376 scm_make_port_classes (int ptobnum
, char *type_name
)
2378 SCM c
, class = make_class_from_template ("<%s-port>",
2380 SCM_LIST1 (scm_class_port
));
2381 scm_port_class
[SCM_IN_PCLASS_INDEX
+ ptobnum
]
2382 = make_class_from_template ("<%s-input-port>",
2384 SCM_LIST2 (class, scm_class_input_port
));
2385 scm_port_class
[SCM_OUT_PCLASS_INDEX
+ ptobnum
]
2386 = make_class_from_template ("<%s-output-port>",
2388 SCM_LIST2 (class, scm_class_output_port
));
2389 scm_port_class
[SCM_INOUT_PCLASS_INDEX
+ ptobnum
]
2391 = make_class_from_template ("<%s-input-output-port>",
2394 scm_class_input_output_port
));
2395 /* Patch cpl (since this tree is too complex for the C level compute-cpl) */
2396 SCM_SLOT (c
, scm_si_cpl
)
2397 = scm_cons2 (c
, class, SCM_SLOT (scm_class_input_output_port
, scm_si_cpl
));
2401 create_port_classes (void)
2405 scm_port_class
= (SCM
*) malloc (3 * 256 * sizeof (SCM
));
2406 for (i
= 0; i
< 3 * 256; ++i
)
2407 scm_port_class
[i
] = 0;
2409 for (i
= 0; i
< scm_numptob
; ++i
)
2410 scm_make_port_classes (i
, SCM_PTOBNAME (i
));
2414 make_struct_class (void *closure
, SCM key
, SCM data
, SCM prev
)
2416 if (SCM_NFALSEP (SCM_STRUCT_TABLE_NAME (data
)))
2417 SCM_SET_STRUCT_TABLE_CLASS (data
,
2418 scm_make_extended_class
2419 (SCM_SYMBOL_CHARS (SCM_STRUCT_TABLE_NAME (data
))));
2420 return SCM_UNSPECIFIED
;
2424 create_struct_classes (void)
2426 scm_internal_hash_fold (make_struct_class
, 0, SCM_BOOL_F
, scm_struct_table
);
2429 /**********************************************************************
2433 **********************************************************************/
2438 if (!goops_loaded_p
)
2439 scm_resolve_module (scm_read_0str ("(oop goops)"));
2444 scm_make_foreign_object (SCM
class, SCM initargs
)
2445 #define FUNC_NAME s_scm_make
2447 void * (*constructor
) (SCM
)
2448 = (void * (*) (SCM
)) SCM_SLOT (class, scm_si_constructor
);
2449 if (constructor
== 0)
2450 SCM_MISC_ERROR ("Can't make instances of class ~S", SCM_LIST1 (class));
2451 return scm_wrap_object (class, constructor (initargs
));
2457 scm_free_foreign_object (SCM
*class, SCM
*data
)
2459 size_t (*destructor
) (void *)
2460 = (size_t (*) (void *)) class[scm_si_destructor
];
2461 return destructor (data
);
2465 scm_make_class (SCM meta
, char *s_name
, SCM supers
, size_t size
,
2466 void * (*constructor
) (SCM initargs
),
2467 size_t (*destructor
) (void *))
2470 name
= scm_str2symbol (s_name
);
2471 if (SCM_IMP (supers
))
2472 supers
= SCM_LIST1 (scm_class_foreign_object
);
2473 class = scm_basic_basic_make_class (meta
, name
, supers
, SCM_EOL
);
2474 scm_sys_inherit_magic_x (class, supers
);
2476 if (destructor
!= 0)
2478 SCM_SLOT (class, scm_si_destructor
) = (SCM
) destructor
;
2479 SCM_SET_CLASS_DESTRUCTOR (class, scm_free_foreign_object
);
2483 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
2484 SCM_SET_CLASS_INSTANCE_SIZE (class, size
);
2487 SCM_SLOT (class, scm_si_layout
) = scm_str2symbol ("");
2488 SCM_SLOT (class, scm_si_constructor
) = (SCM
) constructor
;
2493 SCM_SYMBOL (sym_o
, "o");
2494 SCM_SYMBOL (sym_x
, "x");
2496 SCM_KEYWORD (k_accessor
, "accessor");
2497 SCM_KEYWORD (k_getter
, "getter");
2500 default_setter (SCM obj
, SCM c
)
2502 scm_misc_error ("slot-set!", "read-only slot", SCM_EOL
);
2507 scm_add_slot (SCM
class, char *slot_name
, SCM slot_class
,
2508 SCM (*getter
) (SCM obj
),
2509 SCM (*setter
) (SCM obj
, SCM x
),
2510 char *accessor_name
)
2513 SCM get
= scm_make_subr_opt ("goops:get", scm_tc7_subr_1
, getter
, 0);
2514 SCM set
= scm_make_subr_opt ("goops:set", scm_tc7_subr_2
,
2515 setter
? setter
: default_setter
, 0);
2516 SCM getm
= scm_closure (SCM_LIST2 (SCM_LIST1 (sym_o
),
2517 SCM_LIST2 (get
, sym_o
)),
2519 SCM setm
= scm_closure (SCM_LIST2 (SCM_LIST2 (sym_o
, sym_x
),
2520 SCM_LIST3 (set
, sym_o
, sym_x
)),
2523 SCM name
= scm_str2symbol (slot_name
);
2524 SCM aname
= scm_str2symbol (accessor_name
);
2525 SCM gf
= scm_ensure_accessor (aname
);
2526 SCM slot
= SCM_LIST5 (name
,
2527 k_class
, slot_class
,
2528 setter
? k_accessor
: k_getter
,
2530 SCM gns
= SCM_LIST4 (name
, SCM_BOOL_F
, get
, set
);
2532 scm_add_method (gf
, scm_make (SCM_LIST5 (scm_class_accessor
,
2535 k_procedure
, getm
)));
2536 scm_add_method (scm_setter (gf
),
2537 scm_make (SCM_LIST5 (scm_class_accessor
,
2541 k_procedure
, setm
)));
2544 SCM_SLOT (class, scm_si_slots
)
2545 = scm_append_x (SCM_LIST2 (SCM_SLOT (class, scm_si_slots
),
2547 SCM_SLOT (class, scm_si_getters_n_setters
)
2548 = scm_append_x (SCM_LIST2 (SCM_SLOT (class, scm_si_getters_n_setters
),
2553 int n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
2555 SCM_SLOT (class, scm_si_nfields
)
2556 = SCM_MAKINUM (n
+ 1);
2561 scm_wrap_object (SCM
class, void *data
)
2565 SCM_SETCDR (z
, (SCM
) data
);
2566 SCM_SET_STRUCT_GC_CHAIN (z
, 0);
2567 SCM_SETCAR (z
, SCM_UNPACK (SCM_CDR (class)) | scm_tc3_cons_gloc
);
2574 scm_wrap_component (SCM
class, SCM container
, void *data
)
2576 SCM obj
= scm_wrap_object (class, data
);
2577 SCM handle
= scm_hash_fn_create_handle_x (scm_components
,
2583 SCM_SETCDR (handle
, container
);
2588 scm_ensure_accessor (SCM name
)
2590 SCM gf
= scm_apply (SCM_TOP_LEVEL_LOOKUP_CLOSURE
,
2591 SCM_LIST2 (name
, SCM_BOOL_F
),
2593 if (!SCM_IS_A_P (gf
, scm_class_generic_with_setter
))
2595 gf
= scm_make (SCM_LIST3 (scm_class_generic
, k_name
, name
));
2596 gf
= scm_make (SCM_LIST5 (scm_class_generic_with_setter
,
2603 SCM_SYMBOL (sym_internal_add_method_x
, "internal-add-method!");
2606 scm_add_method (SCM gf
, SCM m
)
2608 scm_eval (SCM_LIST3 (sym_internal_add_method_x
, gf
, m
), scm_module_goops
);
2613 * Debugging utilities
2616 SCM_DEFINE (scm_pure_generic_p
, "pure-generic?", 1, 0, 0,
2618 "Return @code{#t} if @var{obj} is a pure generic.")
2619 #define FUNC_NAME s_scm_pure_generic_p
2621 return SCM_BOOL (SCM_PUREGENERICP (obj
));
2625 #endif /* GUILE_DEBUG */
2631 SCM_DEFINE (scm_sys_goops_loaded
, "%goops-loaded", 0, 0, 0,
2633 "Announce that GOOPS is loaded and perform initialization\n"
2634 "on the C level which depends on the loaded GOOPS modules.")
2635 #define FUNC_NAME s_scm_sys_goops_loaded
2638 var_compute_applicable_methods
2639 = SCM_CDR (scm_apply (scm_goops_lookup_closure
,
2640 SCM_LIST2 (SCM_CAR (var_compute_applicable_methods
),
2643 return SCM_UNSPECIFIED
;
2647 SCM scm_module_goops
;
2650 scm_init_goops (void)
2653 scm_module_goops
= scm_make_module (scm_read_0str ("(oop goops)"));
2654 old_module
= scm_set_current_module (scm_module_goops
);
2656 scm_goops_lookup_closure
= scm_module_lookup_closure (scm_module_goops
);
2658 /* Not really necessary right now, but who knows...
2660 scm_permanent_object (scm_module_goops
);
2661 scm_permanent_object (scm_goops_lookup_closure
);
2663 scm_components
= scm_permanent_object (scm_make_weak_key_hash_table
2664 (SCM_MAKINUM (37)));
2666 goops_rstate
= scm_c_make_rstate ("GOOPS", 5);
2668 #ifndef SCM_MAGIC_SNARFER
2669 #include "libguile/goops.x"
2672 list_of_no_method
= scm_permanent_object (SCM_LIST1 (sym_no_method
));
2674 hell
= scm_must_malloc (hell_size
, "hell");
2676 scm_mutex_init (&hell_mutex
);
2679 create_basic_classes ();
2680 create_standard_classes ();
2681 create_smob_classes ();
2682 create_struct_classes ();
2683 create_port_classes ();
2686 SCM name
= scm_str2symbol ("no-applicable-method");
2687 scm_no_applicable_method
2688 = scm_permanent_object (scm_make (SCM_LIST3 (scm_class_generic
,
2691 DEFVAR (name
, scm_no_applicable_method
);
2694 scm_set_current_module (old_module
);
2698 scm_init_oop_goops_goopscore_module ()
2700 scm_register_module_xxx ("oop goops goopscore", (void *) scm_init_goops
);