1 /* Copyright (C) 1998,1999,2000,2001, 2002, 2003 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/root.h"
67 #include "libguile/smob.h"
68 #include "libguile/strings.h"
69 #include "libguile/strports.h"
70 #include "libguile/vectors.h"
71 #include "libguile/weaks.h"
73 #include "libguile/validate.h"
74 #include "libguile/goops.h"
76 #define SPEC_OF(x) SCM_SLOT (x, scm_si_specializers)
78 #define DEFVAR(v, val) \
79 { scm_eval (scm_list_3 (scm_sym_define_public, (v), (val)), \
81 /* Temporary hack until we get the new module system */
82 /*fixme* Should optimize by keeping track of the variable object itself */
83 #define GETVAR(v) (SCM_VARIABLE_REF (scm_call_2 (scm_goops_lookup_closure, \
86 /* Fixme: Should use already interned symbols */
87 #define CALL_GF1(name, a) (scm_call_1 (GETVAR (scm_str2symbol (name)), \
89 #define CALL_GF2(name, a, b) (scm_call_2 (GETVAR (scm_str2symbol (name)), \
91 #define CALL_GF3(name, a, b, c) (scm_call_3 (GETVAR (scm_str2symbol (name)), \
93 #define CALL_GF4(name, a, b, c, d) (scm_call_4 (GETVAR (scm_str2symbol (name)), \
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 /* The following definition is located in libguile/objects.h:
115 #define SCM_OBJ_CLASS_REDEF(x) (SCM_STRUCT_VTABLE_DATA(x)[scm_si_redefined])
118 #define TEST_CHANGE_CLASS(obj, class) \
120 class = SCM_CLASS_OF (obj); \
121 if (SCM_OBJ_CLASS_REDEF (obj) != SCM_BOOL_F) \
122 scm_change_object_class (obj, class, SCM_OBJ_CLASS_REDEF (obj)); \
125 #define NXT_MTHD_METHODS(m) (SCM_VELTS (m)[1])
126 #define NXT_MTHD_ARGS(m) (SCM_VELTS (m)[2])
128 #define SCM_GOOPS_UNBOUND SCM_UNBOUND
129 #define SCM_GOOPS_UNBOUNDP(x) ((x) == SCM_GOOPS_UNBOUND)
131 static int goops_loaded_p
= 0;
132 static scm_t_rstate
*goops_rstate
;
134 static SCM scm_goops_lookup_closure
;
136 /* Some classes are defined in libguile/objects.c. */
137 SCM scm_class_top
, scm_class_object
, scm_class_class
;
138 SCM scm_class_entity
, scm_class_entity_with_setter
;
139 SCM scm_class_generic
, scm_class_generic_with_setter
;
140 SCM scm_class_extended_generic
, scm_class_extended_generic_with_setter
;
141 SCM 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 fully handle multiple-inheritance. It serves
171 * only for booting classes and will be overloaded in Scheme
173 ******************************************************************************/
176 map (SCM (*proc
) (SCM
), SCM ls
)
182 SCM res
= scm_cons (proc (SCM_CAR (ls
)), SCM_EOL
);
185 while (!SCM_NULLP (ls
))
187 SCM_SETCDR (h
, scm_cons (proc (SCM_CAR (ls
)), SCM_EOL
));
199 while (!SCM_NULLP (ls
))
201 SCM el
= SCM_CAR (ls
);
202 if (SCM_FALSEP (scm_c_memq (el
, res
)))
203 res
= scm_cons (el
, res
);
210 compute_cpl (SCM
class)
213 return CALL_GF1 ("compute-cpl", class);
216 SCM supers
= SCM_SLOT (class, scm_si_direct_supers
);
217 SCM ls
= scm_append (scm_acons (class, supers
,
218 map (compute_cpl
, supers
)));
219 return scm_reverse_x (filter_cpl (ls
), SCM_EOL
);
223 /******************************************************************************
227 ******************************************************************************/
230 remove_duplicate_slots (SCM l
, SCM res
, SCM slots_already_seen
)
238 if (!SCM_SYMBOLP (tmp
))
239 scm_misc_error ("%compute-slots", "bad slot name ~S", scm_list_1 (tmp
));
241 if (SCM_FALSEP (scm_c_memq (tmp
, slots_already_seen
))) {
242 res
= scm_cons (SCM_CAR (l
), res
);
243 slots_already_seen
= scm_cons (tmp
, slots_already_seen
);
246 return remove_duplicate_slots (SCM_CDR (l
), res
, slots_already_seen
);
250 build_slots_list (SCM dslots
, SCM cpl
)
252 register SCM res
= dslots
;
254 for (cpl
= SCM_CDR (cpl
); !SCM_NULLP (cpl
); cpl
= SCM_CDR (cpl
))
255 res
= scm_append (scm_list_2 (SCM_SLOT (SCM_CAR (cpl
),
256 scm_si_direct_slots
),
259 /* res contains a list of slots. Remove slots which appears more than once */
260 return remove_duplicate_slots (scm_reverse (res
), SCM_EOL
, SCM_EOL
);
267 while (!SCM_NULLP (ls
))
269 if (!SCM_CONSP (SCM_CAR (ls
)))
270 SCM_SETCAR (ls
, scm_cons (SCM_CAR (ls
), SCM_EOL
));
277 SCM_DEFINE (scm_sys_compute_slots
, "%compute-slots", 1, 0, 0,
279 "Return a list consisting of the names of all slots belonging to\n"
280 "class @var{class}, i. e. the slots of @var{class} and of all of\n"
282 #define FUNC_NAME s_scm_sys_compute_slots
284 SCM_VALIDATE_CLASS (1, class);
285 return build_slots_list (SCM_SLOT (class, scm_si_direct_slots
),
286 SCM_SLOT (class, scm_si_cpl
));
291 /******************************************************************************
293 * compute-getters-n-setters
295 * This version doesn't handle slot options. It serves only for booting
296 * classes and will be overloaded in Scheme.
298 ******************************************************************************/
300 SCM_KEYWORD (k_init_value
, "init-value");
301 SCM_KEYWORD (k_init_thunk
, "init-thunk");
304 compute_getters_n_setters (SCM slots
)
310 for ( ; !SCM_NULLP (slots
); slots
= SCM_CDR (slots
))
312 SCM init
= SCM_BOOL_F
;
313 SCM options
= SCM_CDAR (slots
);
314 if (!SCM_NULLP (options
))
316 init
= scm_get_keyword (k_init_value
, options
, 0);
318 init
= scm_closure (scm_list_2 (SCM_EOL
,
319 scm_list_2 (scm_sym_quote
, init
)),
322 init
= scm_get_keyword (k_init_thunk
, options
, SCM_BOOL_F
);
324 *cdrloc
= scm_cons (scm_cons (SCM_CAAR (slots
),
328 cdrloc
= SCM_CDRLOC (*cdrloc
);
333 /******************************************************************************
337 ******************************************************************************/
339 /*fixme* Manufacture keywords in advance */
341 scm_i_get_keyword (SCM key
, SCM l
, long len
, SCM default_value
, const char *subr
)
345 for (i
= 0; i
!= len
; i
+= 2)
347 SCM obj
= SCM_CAR (l
);
349 if (!SCM_KEYWORDP (obj
))
350 scm_misc_error (subr
, "bad keyword: ~S", scm_list_1 (obj
));
351 else if (SCM_EQ_P (obj
, key
))
357 return default_value
;
361 SCM_DEFINE (scm_get_keyword
, "get-keyword", 3, 0, 0,
362 (SCM key
, SCM l
, SCM default_value
),
363 "Determine an associated value for the keyword @var{key} from\n"
364 "the list @var{l}. The list @var{l} has to consist of an even\n"
365 "number of elements, where, starting with the first, every\n"
366 "second element is a keyword, followed by its associated value.\n"
367 "If @var{l} does not hold a value for @var{key}, the value\n"
368 "@var{default_value} is returned.")
369 #define FUNC_NAME s_scm_get_keyword
373 SCM_ASSERT (SCM_KEYWORDP (key
), key
, SCM_ARG1
, FUNC_NAME
);
374 len
= scm_ilength (l
);
375 if (len
< 0 || len
% 2 == 1)
376 scm_misc_error (FUNC_NAME
, "Bad keyword-value list: ~S", scm_list_1 (l
));
378 return scm_i_get_keyword (key
, l
, len
, default_value
, FUNC_NAME
);
383 SCM_KEYWORD (k_init_keyword
, "init-keyword");
385 static SCM
get_slot_value (SCM
class, SCM obj
, SCM slotdef
);
386 static SCM
set_slot_value (SCM
class, SCM obj
, SCM slotdef
, SCM value
);
388 SCM_DEFINE (scm_sys_initialize_object
, "%initialize-object", 2, 0, 0,
389 (SCM obj
, SCM initargs
),
390 "Initialize the object @var{obj} with the given arguments\n"
392 #define FUNC_NAME s_scm_sys_initialize_object
394 SCM tmp
, get_n_set
, slots
;
395 SCM
class = SCM_CLASS_OF (obj
);
398 SCM_VALIDATE_INSTANCE (1, obj
);
399 n_initargs
= scm_ilength (initargs
);
400 SCM_ASSERT ((n_initargs
& 1) == 0, initargs
, SCM_ARG2
, FUNC_NAME
);
402 get_n_set
= SCM_SLOT (class, scm_si_getters_n_setters
);
403 slots
= SCM_SLOT (class, scm_si_slots
);
405 /* See for each slot how it must be initialized */
408 get_n_set
= SCM_CDR (get_n_set
), slots
= SCM_CDR (slots
))
410 SCM slot_name
= SCM_CAR (slots
);
413 if (!SCM_NULLP (SCM_CDR (slot_name
)))
415 /* This slot admits (perhaps) to be initialized at creation time */
416 long n
= scm_ilength (SCM_CDR (slot_name
));
417 if (n
& 1) /* odd or -1 */
418 SCM_MISC_ERROR ("class contains bogus slot definition: ~S",
419 scm_list_1 (slot_name
));
420 tmp
= scm_i_get_keyword (k_init_keyword
,
425 slot_name
= SCM_CAR (slot_name
);
428 /* an initarg was provided for this slot */
429 if (!SCM_KEYWORDP (tmp
))
430 SCM_MISC_ERROR ("initarg must be a keyword. It was ~S",
432 slot_value
= scm_i_get_keyword (tmp
,
441 /* set slot to provided value */
442 set_slot_value (class, obj
, SCM_CAR (get_n_set
), slot_value
);
445 /* set slot to its :init-form if it exists */
446 tmp
= SCM_CADAR (get_n_set
);
447 if (tmp
!= SCM_BOOL_F
)
449 slot_value
= get_slot_value (class, obj
, SCM_CAR (get_n_set
));
450 if (SCM_GOOPS_UNBOUNDP (slot_value
))
452 SCM env
= SCM_EXTEND_ENV (SCM_EOL
, SCM_EOL
, SCM_ENV (tmp
));
453 set_slot_value (class,
456 scm_eval_body (SCM_CLOSURE_BODY (tmp
), env
));
467 SCM_KEYWORD (k_class
, "class");
468 SCM_KEYWORD (k_allocation
, "allocation");
469 SCM_KEYWORD (k_instance
, "instance");
471 SCM_DEFINE (scm_sys_prep_layout_x
, "%prep-layout!", 1, 0, 0,
474 #define FUNC_NAME s_scm_sys_prep_layout_x
477 unsigned long int n
, i
;
480 SCM_VALIDATE_INSTANCE (1, class);
481 slots
= SCM_SLOT (class, scm_si_slots
);
482 nfields
= SCM_SLOT (class, scm_si_nfields
);
483 if (!SCM_INUMP (nfields
) || SCM_INUM (nfields
) < 0)
484 SCM_MISC_ERROR ("bad value in nfields slot: ~S",
485 scm_list_1 (nfields
));
486 n
= 2 * SCM_INUM (nfields
);
487 if (n
< sizeof (SCM_CLASS_CLASS_LAYOUT
) - 1
488 && SCM_SUBCLASSP (class, scm_class_class
))
489 SCM_MISC_ERROR ("class object doesn't have enough fields: ~S",
490 scm_list_1 (nfields
));
492 s
= n
> 0 ? scm_malloc (n
) : 0;
493 for (i
= 0; i
< n
; i
+= 2)
496 SCM type
, allocation
;
499 if (!SCM_CONSP (slots
))
500 SCM_MISC_ERROR ("too few slot definitions", SCM_EOL
);
501 len
= scm_ilength (SCM_CDAR (slots
));
502 allocation
= scm_i_get_keyword (k_allocation
, SCM_CDAR (slots
),
503 len
, k_instance
, FUNC_NAME
);
504 while (!SCM_EQ_P (allocation
, k_instance
))
506 slots
= SCM_CDR (slots
);
507 len
= scm_ilength (SCM_CDAR (slots
));
508 allocation
= scm_i_get_keyword (k_allocation
, SCM_CDAR (slots
),
509 len
, k_instance
, FUNC_NAME
);
511 type
= scm_i_get_keyword (k_class
, SCM_CDAR (slots
),
512 len
, SCM_BOOL_F
, FUNC_NAME
);
513 if (SCM_FALSEP (type
))
520 if (!SCM_CLASSP (type
))
521 SCM_MISC_ERROR ("bad slot class", SCM_EOL
);
522 else if (SCM_SUBCLASSP (type
, scm_class_foreign_slot
))
524 if (SCM_SUBCLASSP (type
, scm_class_self
))
526 else if (SCM_SUBCLASSP (type
, scm_class_protected
))
531 if (SCM_SUBCLASSP (type
, scm_class_opaque
))
533 else if (SCM_SUBCLASSP (type
, scm_class_read_only
))
546 slots
= SCM_CDR (slots
);
548 SCM_SET_SLOT (class, scm_si_layout
, scm_mem2symbol (s
, n
));
551 return SCM_UNSPECIFIED
;
555 static void prep_hashsets (SCM
);
557 SCM_DEFINE (scm_sys_inherit_magic_x
, "%inherit-magic!", 2, 0, 0,
558 (SCM
class, SCM dsupers
),
560 #define FUNC_NAME s_scm_sys_inherit_magic_x
564 SCM_VALIDATE_INSTANCE (1, class);
565 while (!SCM_NULLP (ls
))
567 SCM_ASSERT (SCM_CONSP (ls
)
568 && SCM_INSTANCEP (SCM_CAR (ls
)),
572 flags
|= SCM_CLASS_FLAGS (SCM_CAR (ls
));
575 flags
&= SCM_CLASSF_INHERIT
;
576 if (flags
& SCM_CLASSF_ENTITY
)
577 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_entity
);
580 long n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
583 * We could avoid calling scm_gc_malloc in the allocation code
584 * (in which case the following two lines are needed). Instead
585 * we make 0-slot instances non-light, so that the light case
586 * can be handled without special cases.
589 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_0
);
591 if (n
> 0 && !(flags
& SCM_CLASSF_METACLASS
))
593 /* NOTE: The following depends on scm_struct_i_size. */
594 flags
|= SCM_STRUCTF_LIGHT
+ n
* sizeof (SCM
); /* use light representation */
595 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
598 SCM_SET_CLASS_FLAGS (class, flags
);
600 prep_hashsets (class);
602 return SCM_UNSPECIFIED
;
607 prep_hashsets (SCM
class)
611 for (i
= 0; i
< 7; ++i
)
612 SCM_SET_HASHSET (class, i
, scm_c_uniform32 (goops_rstate
));
615 /******************************************************************************/
618 scm_basic_basic_make_class (SCM
class, SCM name
, SCM dsupers
, SCM dslots
)
620 SCM z
, cpl
, slots
, nfields
, g_n_s
;
622 /* Allocate one instance */
623 z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
625 /* Initialize its slots */
626 SCM_SET_SLOT (z
, scm_si_direct_supers
, dsupers
);
627 cpl
= compute_cpl (z
);
628 slots
= build_slots_list (maplist (dslots
), cpl
);
629 nfields
= SCM_MAKINUM (scm_ilength (slots
));
630 g_n_s
= compute_getters_n_setters (slots
);
632 SCM_SET_SLOT (z
, scm_si_name
, name
);
633 SCM_SET_SLOT (z
, scm_si_direct_slots
, dslots
);
634 SCM_SET_SLOT (z
, scm_si_direct_subclasses
, SCM_EOL
);
635 SCM_SET_SLOT (z
, scm_si_direct_methods
, SCM_EOL
);
636 SCM_SET_SLOT (z
, scm_si_cpl
, cpl
);
637 SCM_SET_SLOT (z
, scm_si_slots
, slots
);
638 SCM_SET_SLOT (z
, scm_si_nfields
, nfields
);
639 SCM_SET_SLOT (z
, scm_si_getters_n_setters
, g_n_s
);
640 SCM_SET_SLOT (z
, scm_si_redefined
, SCM_BOOL_F
);
641 SCM_SET_SLOT (z
, scm_si_environment
,
642 scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE
));
644 /* Add this class in the direct-subclasses slot of dsupers */
647 for (tmp
= dsupers
; !SCM_NULLP (tmp
); tmp
= SCM_CDR (tmp
))
648 SCM_SET_SLOT (SCM_CAR (tmp
), scm_si_direct_subclasses
,
649 scm_cons (z
, SCM_SLOT (SCM_CAR (tmp
),
650 scm_si_direct_subclasses
)));
653 /* Support for the underlying structs: */
654 SCM_SET_CLASS_FLAGS (z
, (class == scm_class_entity_class
655 ? (SCM_CLASSF_GOOPS_OR_VALID
656 | SCM_CLASSF_OPERATOR
658 : class == scm_class_operator_class
659 ? SCM_CLASSF_GOOPS_OR_VALID
| SCM_CLASSF_OPERATOR
660 : SCM_CLASSF_GOOPS_OR_VALID
));
665 scm_basic_make_class (SCM
class, SCM name
, SCM dsupers
, SCM dslots
)
667 SCM z
= scm_basic_basic_make_class (class, name
, dsupers
, dslots
);
668 scm_sys_inherit_magic_x (z
, dsupers
);
669 scm_sys_prep_layout_x (z
);
673 /******************************************************************************/
675 SCM_SYMBOL (sym_layout
, "layout");
676 SCM_SYMBOL (sym_vcell
, "vcell");
677 SCM_SYMBOL (sym_vtable
, "vtable");
678 SCM_SYMBOL (sym_print
, "print");
679 SCM_SYMBOL (sym_procedure
, "procedure");
680 SCM_SYMBOL (sym_setter
, "setter");
681 SCM_SYMBOL (sym_redefined
, "redefined");
682 SCM_SYMBOL (sym_h0
, "h0");
683 SCM_SYMBOL (sym_h1
, "h1");
684 SCM_SYMBOL (sym_h2
, "h2");
685 SCM_SYMBOL (sym_h3
, "h3");
686 SCM_SYMBOL (sym_h4
, "h4");
687 SCM_SYMBOL (sym_h5
, "h5");
688 SCM_SYMBOL (sym_h6
, "h6");
689 SCM_SYMBOL (sym_h7
, "h7");
690 SCM_SYMBOL (sym_name
, "name");
691 SCM_SYMBOL (sym_direct_supers
, "direct-supers");
692 SCM_SYMBOL (sym_direct_slots
, "direct-slots");
693 SCM_SYMBOL (sym_direct_subclasses
, "direct-subclasses");
694 SCM_SYMBOL (sym_direct_methods
, "direct-methods");
695 SCM_SYMBOL (sym_cpl
, "cpl");
696 SCM_SYMBOL (sym_default_slot_definition_class
, "default-slot-definition-class");
697 SCM_SYMBOL (sym_slots
, "slots");
698 SCM_SYMBOL (sym_getters_n_setters
, "getters-n-setters");
699 SCM_SYMBOL (sym_keyword_access
, "keyword-access");
700 SCM_SYMBOL (sym_nfields
, "nfields");
701 SCM_SYMBOL (sym_environment
, "environment");
705 build_class_class_slots ()
708 scm_list_3 (sym_layout
, k_class
, scm_class_protected_read_only
),
709 scm_list_3 (sym_vtable
, k_class
, scm_class_self
),
710 scm_list_1 (sym_print
),
711 scm_list_3 (sym_procedure
, k_class
, scm_class_protected_opaque
),
712 scm_list_3 (sym_setter
, k_class
, scm_class_protected_opaque
),
713 scm_list_1 (sym_redefined
),
714 scm_list_3 (sym_h0
, k_class
, scm_class_int
),
715 scm_list_3 (sym_h1
, k_class
, scm_class_int
),
716 scm_list_3 (sym_h2
, k_class
, scm_class_int
),
717 scm_list_3 (sym_h3
, k_class
, scm_class_int
),
718 scm_list_3 (sym_h4
, k_class
, scm_class_int
),
719 scm_list_3 (sym_h5
, k_class
, scm_class_int
),
720 scm_list_3 (sym_h6
, k_class
, scm_class_int
),
721 scm_list_3 (sym_h7
, k_class
, scm_class_int
),
722 scm_list_1 (sym_name
),
723 scm_list_1 (sym_direct_supers
),
724 scm_list_1 (sym_direct_slots
),
725 scm_list_1 (sym_direct_subclasses
),
726 scm_list_1 (sym_direct_methods
),
727 scm_list_1 (sym_cpl
),
728 scm_list_1 (sym_default_slot_definition_class
),
729 scm_list_1 (sym_slots
),
730 scm_list_1 (sym_getters_n_setters
),
731 scm_list_1 (sym_keyword_access
),
732 scm_list_1 (sym_nfields
),
733 scm_list_1 (sym_environment
),
738 create_basic_classes (void)
740 /* SCM slots_of_class = build_class_class_slots (); */
742 /**** <scm_class_class> ****/
743 SCM cs
= scm_makfrom0str (SCM_CLASS_CLASS_LAYOUT
744 + 2 * scm_vtable_offset_user
);
745 SCM name
= scm_str2symbol ("<class>");
746 scm_class_class
= scm_permanent_object (scm_make_vtable_vtable (cs
,
749 SCM_SET_CLASS_FLAGS (scm_class_class
, (SCM_CLASSF_GOOPS_OR_VALID
750 | SCM_CLASSF_METACLASS
));
752 SCM_SET_SLOT (scm_class_class
, scm_si_name
, name
);
753 SCM_SET_SLOT (scm_class_class
, scm_si_direct_supers
, SCM_EOL
); /* will be changed */
754 /* SCM_SET_SLOT (scm_class_class, scm_si_direct_slots, slots_of_class); */
755 SCM_SET_SLOT (scm_class_class
, scm_si_direct_subclasses
, SCM_EOL
);
756 SCM_SET_SLOT (scm_class_class
, scm_si_direct_methods
, SCM_EOL
);
757 SCM_SET_SLOT (scm_class_class
, scm_si_cpl
, SCM_EOL
); /* will be changed */
758 /* SCM_SET_SLOT (scm_class_class, scm_si_slots, slots_of_class); */
759 SCM_SET_SLOT (scm_class_class
, scm_si_nfields
, SCM_MAKINUM (SCM_N_CLASS_SLOTS
));
760 /* SCM_SET_SLOT (scm_class_class, scm_si_getters_n_setters,
761 compute_getters_n_setters (slots_of_class)); */
762 SCM_SET_SLOT (scm_class_class
, scm_si_redefined
, SCM_BOOL_F
);
763 SCM_SET_SLOT (scm_class_class
, scm_si_environment
,
764 scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE
));
766 prep_hashsets (scm_class_class
);
768 DEFVAR(name
, scm_class_class
);
770 /**** <scm_class_top> ****/
771 name
= scm_str2symbol ("<top>");
772 scm_class_top
= scm_permanent_object (scm_basic_make_class (scm_class_class
,
777 DEFVAR(name
, scm_class_top
);
779 /**** <scm_class_object> ****/
780 name
= scm_str2symbol ("<object>");
781 scm_class_object
= scm_permanent_object (scm_basic_make_class (scm_class_class
,
783 scm_list_1 (scm_class_top
),
786 DEFVAR (name
, scm_class_object
);
788 /* <top> <object> and <class> were partially initialized. Correct them here */
789 SCM_SET_SLOT (scm_class_object
, scm_si_direct_subclasses
, scm_list_1 (scm_class_class
));
791 SCM_SET_SLOT (scm_class_class
, scm_si_direct_supers
, scm_list_1 (scm_class_object
));
792 SCM_SET_SLOT (scm_class_class
, scm_si_cpl
, scm_list_3 (scm_class_class
, scm_class_object
, scm_class_top
));
795 /******************************************************************************/
797 SCM_DEFINE (scm_instance_p
, "instance?", 1, 0, 0,
799 "Return @code{#t} if @var{obj} is an instance.")
800 #define FUNC_NAME s_scm_instance_p
802 return SCM_BOOL (SCM_INSTANCEP (obj
));
807 /******************************************************************************
809 * Meta object accessors
811 ******************************************************************************/
812 SCM_DEFINE (scm_class_name
, "class-name", 1, 0, 0,
814 "Return the class name of @var{obj}.")
815 #define FUNC_NAME s_scm_class_name
817 SCM_VALIDATE_CLASS (1, obj
);
818 return scm_slot_ref (obj
, sym_name
);
822 SCM_DEFINE (scm_class_direct_supers
, "class-direct-supers", 1, 0, 0,
824 "Return the direct superclasses of the class @var{obj}.")
825 #define FUNC_NAME s_scm_class_direct_supers
827 SCM_VALIDATE_CLASS (1, obj
);
828 return scm_slot_ref (obj
, sym_direct_supers
);
832 SCM_DEFINE (scm_class_direct_slots
, "class-direct-slots", 1, 0, 0,
834 "Return the direct slots of the class @var{obj}.")
835 #define FUNC_NAME s_scm_class_direct_slots
837 SCM_VALIDATE_CLASS (1, obj
);
838 return scm_slot_ref (obj
, sym_direct_slots
);
842 SCM_DEFINE (scm_class_direct_subclasses
, "class-direct-subclasses", 1, 0, 0,
844 "Return the direct subclasses of the class @var{obj}.")
845 #define FUNC_NAME s_scm_class_direct_subclasses
847 SCM_VALIDATE_CLASS (1, obj
);
848 return scm_slot_ref(obj
, sym_direct_subclasses
);
852 SCM_DEFINE (scm_class_direct_methods
, "class-direct-methods", 1, 0, 0,
854 "Return the direct methods of the class @var{obj}")
855 #define FUNC_NAME s_scm_class_direct_methods
857 SCM_VALIDATE_CLASS (1, obj
);
858 return scm_slot_ref (obj
, sym_direct_methods
);
862 SCM_DEFINE (scm_class_precedence_list
, "class-precedence-list", 1, 0, 0,
864 "Return the class precedence list of the class @var{obj}.")
865 #define FUNC_NAME s_scm_class_precedence_list
867 SCM_VALIDATE_CLASS (1, obj
);
868 return scm_slot_ref (obj
, sym_cpl
);
872 SCM_DEFINE (scm_class_slots
, "class-slots", 1, 0, 0,
874 "Return the slot list of the class @var{obj}.")
875 #define FUNC_NAME s_scm_class_slots
877 SCM_VALIDATE_CLASS (1, obj
);
878 return scm_slot_ref (obj
, sym_slots
);
882 SCM_DEFINE (scm_class_environment
, "class-environment", 1, 0, 0,
884 "Return the environment of the class @var{obj}.")
885 #define FUNC_NAME s_scm_class_environment
887 SCM_VALIDATE_CLASS (1, obj
);
888 return scm_slot_ref(obj
, sym_environment
);
893 SCM_DEFINE (scm_generic_function_name
, "generic-function-name", 1, 0, 0,
895 "Return the name of the generic function @var{obj}.")
896 #define FUNC_NAME s_scm_generic_function_name
898 SCM_VALIDATE_GENERIC (1, obj
);
899 return scm_procedure_property (obj
, scm_sym_name
);
903 SCM_SYMBOL (sym_methods
, "methods");
904 SCM_SYMBOL (sym_extended_by
, "extended-by");
905 SCM_SYMBOL (sym_extends
, "extends");
908 SCM
fold_downward_gf_methods (SCM method_lists
, SCM gf
)
910 SCM gfs
= scm_slot_ref (gf
, sym_extended_by
);
911 method_lists
= scm_cons (scm_slot_ref (gf
, sym_methods
), method_lists
);
912 while (!SCM_NULLP (gfs
))
914 method_lists
= fold_downward_gf_methods (method_lists
, SCM_CAR (gfs
));
921 SCM
fold_upward_gf_methods (SCM method_lists
, SCM gf
)
923 if (SCM_IS_A_P (gf
, scm_class_extended_generic
))
925 SCM gfs
= scm_slot_ref (gf
, sym_extends
);
926 while (!SCM_NULLP (gfs
))
928 SCM methods
= scm_slot_ref (SCM_CAR (gfs
), sym_methods
);
929 method_lists
= fold_upward_gf_methods (scm_cons (methods
,
938 SCM_DEFINE (scm_generic_function_methods
, "generic-function-methods", 1, 0, 0,
940 "Return the methods of the generic function @var{obj}.")
941 #define FUNC_NAME s_scm_generic_function_methods
944 SCM_VALIDATE_GENERIC (1, obj
);
945 methods
= fold_upward_gf_methods (SCM_EOL
, obj
);
946 methods
= fold_downward_gf_methods (methods
, obj
);
947 return scm_append (methods
);
951 SCM_DEFINE (scm_method_generic_function
, "method-generic-function", 1, 0, 0,
953 "Return the generic function for the method @var{obj}.")
954 #define FUNC_NAME s_scm_method_generic_function
956 SCM_VALIDATE_METHOD (1, obj
);
957 return scm_slot_ref (obj
, scm_str2symbol ("generic-function"));
961 SCM_DEFINE (scm_method_specializers
, "method-specializers", 1, 0, 0,
963 "Return specializers of the method @var{obj}.")
964 #define FUNC_NAME s_scm_method_specializers
966 SCM_VALIDATE_METHOD (1, obj
);
967 return scm_slot_ref (obj
, scm_str2symbol ("specializers"));
971 SCM_DEFINE (scm_method_procedure
, "method-procedure", 1, 0, 0,
973 "Return the procedure of the method @var{obj}.")
974 #define FUNC_NAME s_scm_method_procedure
976 SCM_VALIDATE_METHOD (1, obj
);
977 return scm_slot_ref (obj
, sym_procedure
);
981 SCM_DEFINE (scm_accessor_method_slot_definition
, "accessor-method-slot-definition", 1, 0, 0,
983 "Return the slot definition of the accessor @var{obj}.")
984 #define FUNC_NAME s_scm_accessor_method_slot_definition
986 SCM_VALIDATE_ACCESSOR (1, obj
);
987 return scm_slot_ref (obj
, scm_str2symbol ("slot-definition"));
991 SCM_DEFINE (scm_sys_tag_body
, "%tag-body", 1, 0, 0,
993 "Internal GOOPS magic---don't use this function!")
994 #define FUNC_NAME s_scm_sys_tag_body
996 return scm_cons (SCM_IM_LAMBDA
, body
);
1000 /******************************************************************************
1002 * S l o t a c c e s s
1004 ******************************************************************************/
1006 SCM_DEFINE (scm_make_unbound
, "make-unbound", 0, 0, 0,
1008 "Return the unbound value.")
1009 #define FUNC_NAME s_scm_make_unbound
1011 return SCM_GOOPS_UNBOUND
;
1015 SCM_DEFINE (scm_unbound_p
, "unbound?", 1, 0, 0,
1017 "Return @code{#t} if @var{obj} is unbound.")
1018 #define FUNC_NAME s_scm_unbound_p
1020 return SCM_GOOPS_UNBOUNDP (obj
) ? SCM_BOOL_T
: SCM_BOOL_F
;
1024 SCM_DEFINE (scm_assert_bound
, "assert-bound", 2, 0, 0,
1025 (SCM value
, SCM obj
),
1026 "Return @var{value} if it is bound, and invoke the\n"
1027 "@var{slot-unbound} method of @var{obj} if it is not.")
1028 #define FUNC_NAME s_scm_assert_bound
1030 if (SCM_GOOPS_UNBOUNDP (value
))
1031 return CALL_GF1 ("slot-unbound", obj
);
1036 SCM_DEFINE (scm_at_assert_bound_ref
, "@assert-bound-ref", 2, 0, 0,
1037 (SCM obj
, SCM index
),
1038 "Like @code{assert-bound}, but use @var{index} for accessing\n"
1039 "the value from @var{obj}.")
1040 #define FUNC_NAME s_scm_at_assert_bound_ref
1042 SCM value
= SCM_SLOT (obj
, SCM_INUM (index
));
1043 if (SCM_GOOPS_UNBOUNDP (value
))
1044 return CALL_GF1 ("slot-unbound", obj
);
1049 SCM_DEFINE (scm_sys_fast_slot_ref
, "%fast-slot-ref", 2, 0, 0,
1050 (SCM obj
, SCM index
),
1051 "Return the slot value with index @var{index} from @var{obj}.")
1052 #define FUNC_NAME s_scm_sys_fast_slot_ref
1054 unsigned long int i
;
1056 SCM_VALIDATE_INSTANCE (1, obj
);
1057 SCM_VALIDATE_INUM (2, index
);
1058 SCM_ASSERT_RANGE (2, index
, SCM_INUM (index
) >= 0);
1059 i
= SCM_INUM (index
);
1060 SCM_ASSERT_RANGE (2, index
, i
< SCM_NUMBER_OF_SLOTS (obj
));
1062 return scm_at_assert_bound_ref (obj
, index
);
1066 SCM_DEFINE (scm_sys_fast_slot_set_x
, "%fast-slot-set!", 3, 0, 0,
1067 (SCM obj
, SCM index
, SCM value
),
1068 "Set the slot with index @var{index} in @var{obj} to\n"
1070 #define FUNC_NAME s_scm_sys_fast_slot_set_x
1072 unsigned long int i
;
1074 SCM_VALIDATE_INSTANCE (1, obj
);
1075 SCM_VALIDATE_INUM (2, index
);
1076 SCM_ASSERT_RANGE (2, index
, SCM_INUM (index
) >= 0);
1077 i
= SCM_INUM (index
);
1078 SCM_ASSERT_RANGE (2, index
, i
< SCM_NUMBER_OF_SLOTS (obj
));
1080 SCM_SET_SLOT (obj
, i
, value
);
1082 return SCM_UNSPECIFIED
;
1089 /* In the future, this function will return the effective slot
1090 * definition associated with SLOT_NAME. Now it just returns some of
1091 * the information which will be stored in the effective slot
1096 slot_definition_using_name (SCM
class, SCM slot_name
)
1098 register SCM slots
= SCM_SLOT (class, scm_si_getters_n_setters
);
1099 for (; !SCM_NULLP (slots
); slots
= SCM_CDR (slots
))
1100 if (SCM_CAAR (slots
) == slot_name
)
1101 return SCM_CAR (slots
);
1106 get_slot_value (SCM
class SCM_UNUSED
, SCM obj
, SCM slotdef
)
1108 SCM access
= SCM_CDDR (slotdef
);
1110 * - access is an integer (the offset of this slot in the slots vector)
1111 * - otherwise (car access) is the getter function to apply
1113 if (SCM_INUMP (access
))
1114 return SCM_SLOT (obj
, SCM_INUM (access
));
1117 /* We must evaluate (apply (car access) (list obj))
1118 * where (car access) is known to be a closure of arity 1 */
1119 register SCM code
, env
;
1121 code
= SCM_CAR (access
);
1122 if (!SCM_CLOSUREP (code
))
1123 return SCM_SUBRF (code
) (obj
);
1124 env
= SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (code
),
1127 /* Evaluate the closure body */
1128 return scm_eval_body (SCM_CLOSURE_BODY (code
), env
);
1133 get_slot_value_using_name (SCM
class, SCM obj
, SCM slot_name
)
1135 SCM slotdef
= slot_definition_using_name (class, slot_name
);
1136 if (!SCM_FALSEP (slotdef
))
1137 return get_slot_value (class, obj
, slotdef
);
1139 return CALL_GF3 ("slot-missing", class, obj
, slot_name
);
1143 set_slot_value (SCM
class SCM_UNUSED
, SCM obj
, SCM slotdef
, SCM value
)
1145 SCM access
= SCM_CDDR (slotdef
);
1147 * - access is an integer (the offset of this slot in the slots vector)
1148 * - otherwise (cadr access) is the setter function to apply
1150 if (SCM_INUMP (access
))
1151 SCM_SET_SLOT (obj
, SCM_INUM (access
), value
);
1154 /* We must evaluate (apply (cadr l) (list obj value))
1155 * where (cadr l) is known to be a closure of arity 2 */
1156 register SCM code
, env
;
1158 code
= SCM_CADR (access
);
1159 if (!SCM_CLOSUREP (code
))
1160 SCM_SUBRF (code
) (obj
, value
);
1163 env
= SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (code
),
1164 scm_list_2 (obj
, value
),
1166 /* Evaluate the closure body */
1167 scm_eval_body (SCM_CLOSURE_BODY (code
), env
);
1170 return SCM_UNSPECIFIED
;
1174 set_slot_value_using_name (SCM
class, SCM obj
, SCM slot_name
, SCM value
)
1176 SCM slotdef
= slot_definition_using_name (class, slot_name
);
1177 if (!SCM_FALSEP (slotdef
))
1178 return set_slot_value (class, obj
, slotdef
, value
);
1180 return CALL_GF4 ("slot-missing", class, obj
, slot_name
, value
);
1184 test_slot_existence (SCM
class SCM_UNUSED
, SCM obj
, SCM slot_name
)
1188 for (l
= SCM_ACCESSORS_OF (obj
); !SCM_NULLP (l
); l
= SCM_CDR (l
))
1189 if (SCM_EQ_P (SCM_CAAR (l
), slot_name
))
1195 /* ======================================== */
1197 SCM_DEFINE (scm_slot_ref_using_class
, "slot-ref-using-class", 3, 0, 0,
1198 (SCM
class, SCM obj
, SCM slot_name
),
1200 #define FUNC_NAME s_scm_slot_ref_using_class
1204 SCM_VALIDATE_CLASS (1, class);
1205 SCM_VALIDATE_INSTANCE (2, obj
);
1206 SCM_VALIDATE_SYMBOL (3, slot_name
);
1208 res
= get_slot_value_using_name (class, obj
, slot_name
);
1209 if (SCM_GOOPS_UNBOUNDP (res
))
1210 return CALL_GF3 ("slot-unbound", class, obj
, slot_name
);
1216 SCM_DEFINE (scm_slot_set_using_class_x
, "slot-set-using-class!", 4, 0, 0,
1217 (SCM
class, SCM obj
, SCM slot_name
, SCM value
),
1219 #define FUNC_NAME s_scm_slot_set_using_class_x
1221 SCM_VALIDATE_CLASS (1, class);
1222 SCM_VALIDATE_INSTANCE (2, obj
);
1223 SCM_VALIDATE_SYMBOL (3, slot_name
);
1225 return set_slot_value_using_name (class, obj
, slot_name
, value
);
1230 SCM_DEFINE (scm_slot_bound_using_class_p
, "slot-bound-using-class?", 3, 0, 0,
1231 (SCM
class, SCM obj
, SCM slot_name
),
1233 #define FUNC_NAME s_scm_slot_bound_using_class_p
1235 SCM_VALIDATE_CLASS (1, class);
1236 SCM_VALIDATE_INSTANCE (2, obj
);
1237 SCM_VALIDATE_SYMBOL (3, slot_name
);
1239 return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class, obj
, slot_name
))
1245 SCM_DEFINE (scm_slot_exists_using_class_p
, "slot-exists-using-class?", 3, 0, 0,
1246 (SCM
class, SCM obj
, SCM slot_name
),
1248 #define FUNC_NAME s_scm_slot_exists_using_class_p
1250 SCM_VALIDATE_CLASS (1, class);
1251 SCM_VALIDATE_INSTANCE (2, obj
);
1252 SCM_VALIDATE_SYMBOL (3, slot_name
);
1253 return test_slot_existence (class, obj
, slot_name
);
1258 /* ======================================== */
1260 SCM_DEFINE (scm_slot_ref
, "slot-ref", 2, 0, 0,
1261 (SCM obj
, SCM slot_name
),
1262 "Return the value from @var{obj}'s slot with the name\n"
1264 #define FUNC_NAME s_scm_slot_ref
1268 SCM_VALIDATE_INSTANCE (1, obj
);
1269 TEST_CHANGE_CLASS (obj
, class);
1271 res
= get_slot_value_using_name (class, obj
, slot_name
);
1272 if (SCM_GOOPS_UNBOUNDP (res
))
1273 return CALL_GF3 ("slot-unbound", class, obj
, slot_name
);
1278 SCM_DEFINE (scm_slot_set_x
, "slot-set!", 3, 0, 0,
1279 (SCM obj
, SCM slot_name
, SCM value
),
1280 "Set the slot named @var{slot_name} of @var{obj} to @var{value}.")
1281 #define FUNC_NAME s_scm_slot_set_x
1285 SCM_VALIDATE_INSTANCE (1, obj
);
1286 TEST_CHANGE_CLASS(obj
, class);
1288 return set_slot_value_using_name (class, obj
, slot_name
, value
);
1292 const char *scm_s_slot_set_x
= s_scm_slot_set_x
;
1294 SCM_DEFINE (scm_slot_bound_p
, "slot-bound?", 2, 0, 0,
1295 (SCM obj
, SCM slot_name
),
1296 "Return @code{#t} if the slot named @var{slot_name} of @var{obj}\n"
1298 #define FUNC_NAME s_scm_slot_bound_p
1302 SCM_VALIDATE_INSTANCE (1, obj
);
1303 TEST_CHANGE_CLASS(obj
, class);
1305 return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class,
1313 SCM_DEFINE (scm_slot_exists_p
, "slot-exists?", 2, 0, 0,
1314 (SCM obj
, SCM slot_name
),
1315 "Return @code{#t} if @var{obj} has a slot named @var{slot_name}.")
1316 #define FUNC_NAME s_scm_slot_exists_p
1320 SCM_VALIDATE_INSTANCE (1, obj
);
1321 SCM_VALIDATE_SYMBOL (2, slot_name
);
1322 TEST_CHANGE_CLASS (obj
, class);
1324 return test_slot_existence (class, obj
, slot_name
);
1329 /******************************************************************************
1331 * %allocate-instance (the low level instance allocation primitive)
1333 ******************************************************************************/
1335 static void clear_method_cache (SCM
);
1338 wrap_init (SCM
class, SCM
*m
, long n
)
1342 /* Set all slots to unbound */
1343 for (i
= 0; i
< n
; i
++)
1344 m
[i
] = SCM_GOOPS_UNBOUND
;
1346 return scm_double_cell ((((scm_t_bits
) SCM_STRUCT_DATA (class))
1348 (scm_t_bits
) m
, 0, 0);
1351 SCM_DEFINE (scm_sys_allocate_instance
, "%allocate-instance", 2, 0, 0,
1352 (SCM
class, SCM initargs
),
1353 "Create a new instance of class @var{class} and initialize it\n"
1354 "from the arguments @var{initargs}.")
1355 #define FUNC_NAME s_scm_sys_allocate_instance
1360 SCM_VALIDATE_CLASS (1, class);
1362 /* Most instances */
1363 if (SCM_CLASS_FLAGS (class) & SCM_STRUCTF_LIGHT
)
1365 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1366 m
= (SCM
*) scm_gc_malloc (n
* sizeof (SCM
), "struct");
1367 return wrap_init (class, m
, n
);
1370 /* Foreign objects */
1371 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_FOREIGN
)
1372 return scm_make_foreign_object (class, initargs
);
1374 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1377 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_ENTITY
)
1379 m
= (SCM
*) scm_alloc_struct (n
, scm_struct_entity_n_extra_words
,
1381 m
[scm_struct_i_setter
] = SCM_BOOL_F
;
1382 m
[scm_struct_i_procedure
] = SCM_BOOL_F
;
1383 /* Generic functions */
1384 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_PURE_GENERIC
)
1386 SCM gf
= wrap_init (class, m
, n
);
1387 clear_method_cache (gf
);
1391 return wrap_init (class, m
, n
);
1395 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_METACLASS
)
1399 /* allocate class object */
1400 SCM z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
1402 SCM_SET_SLOT (z
, scm_si_print
, SCM_GOOPS_UNBOUND
);
1403 for (i
= scm_si_goops_fields
; i
< n
; i
++)
1404 SCM_SET_SLOT (z
, i
, SCM_GOOPS_UNBOUND
);
1406 if (SCM_SUBCLASSP (class, scm_class_entity_class
))
1407 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
| SCM_CLASSF_ENTITY
);
1408 else if (SCM_SUBCLASSP (class, scm_class_operator_class
))
1409 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
);
1414 /* Non-light instances */
1416 m
= (SCM
*) scm_alloc_struct (n
, scm_struct_n_extra_words
, "heavy struct");
1417 return wrap_init (class, m
, n
);
1422 SCM_DEFINE (scm_sys_set_object_setter_x
, "%set-object-setter!", 2, 0, 0,
1423 (SCM obj
, SCM setter
),
1425 #define FUNC_NAME s_scm_sys_set_object_setter_x
1427 SCM_ASSERT (SCM_STRUCTP (obj
)
1428 && ((SCM_CLASS_FLAGS (obj
) & SCM_CLASSF_OPERATOR
)
1429 || SCM_I_ENTITYP (obj
)),
1433 if (SCM_I_ENTITYP (obj
))
1434 SCM_SET_ENTITY_SETTER (obj
, setter
);
1436 SCM_OPERATOR_CLASS (obj
)->setter
= setter
;
1437 return SCM_UNSPECIFIED
;
1441 /******************************************************************************
1443 * %modify-instance (used by change-class to modify in place)
1445 ******************************************************************************/
1447 SCM_DEFINE (scm_sys_modify_instance
, "%modify-instance", 2, 0, 0,
1450 #define FUNC_NAME s_scm_sys_modify_instance
1452 SCM_VALIDATE_INSTANCE (1, old
);
1453 SCM_VALIDATE_INSTANCE (2, new);
1455 /* Exchange the data contained in old and new. We exchange rather than
1456 * scratch the old value with new to be correct with GC.
1457 * See "Class redefinition protocol above".
1461 SCM car
= SCM_CAR (old
);
1462 SCM cdr
= SCM_CDR (old
);
1463 SCM_SETCAR (old
, SCM_CAR (new));
1464 SCM_SETCDR (old
, SCM_CDR (new));
1465 SCM_SETCAR (new, car
);
1466 SCM_SETCDR (new, cdr
);
1469 return SCM_UNSPECIFIED
;
1473 SCM_DEFINE (scm_sys_modify_class
, "%modify-class", 2, 0, 0,
1476 #define FUNC_NAME s_scm_sys_modify_class
1478 SCM_VALIDATE_CLASS (1, old
);
1479 SCM_VALIDATE_CLASS (2, new);
1483 SCM car
= SCM_CAR (old
);
1484 SCM cdr
= SCM_CDR (old
);
1485 SCM_SETCAR (old
, SCM_CAR (new));
1486 SCM_SETCDR (old
, SCM_CDR (new));
1487 SCM_STRUCT_DATA (old
)[scm_vtable_index_vtable
] = SCM_UNPACK (old
);
1488 SCM_SETCAR (new, car
);
1489 SCM_SETCDR (new, cdr
);
1490 SCM_STRUCT_DATA (new)[scm_vtable_index_vtable
] = SCM_UNPACK (new);
1493 return SCM_UNSPECIFIED
;
1497 SCM_DEFINE (scm_sys_invalidate_class
, "%invalidate-class", 1, 0, 0,
1500 #define FUNC_NAME s_scm_sys_invalidate_class
1502 SCM_VALIDATE_CLASS (1, class);
1503 SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID
);
1504 return SCM_UNSPECIFIED
;
1508 /* When instances change class, they finally get a new body, but
1509 * before that, they go through purgatory in hell. Odd as it may
1510 * seem, this data structure saves us from eternal suffering in
1511 * infinite recursions.
1514 static scm_t_bits
**hell
;
1515 static long n_hell
= 1; /* one place for the evil one himself */
1516 static long hell_size
= 4;
1517 static SCM hell_mutex
;
1523 for (i
= 1; i
< n_hell
; ++i
)
1524 if (SCM_STRUCT_DATA (o
) == hell
[i
])
1530 go_to_hell (void *o
)
1532 SCM obj
= SCM_PACK ((scm_t_bits
) o
);
1533 scm_lock_mutex (hell_mutex
);
1534 if (n_hell
== hell_size
)
1536 long new_size
= 2 * hell_size
;
1537 hell
= scm_realloc (hell
, new_size
);
1538 hell_size
= new_size
;
1540 hell
[n_hell
++] = SCM_STRUCT_DATA (obj
);
1541 scm_unlock_mutex (hell_mutex
);
1545 go_to_heaven (void *o
)
1547 scm_lock_mutex (hell_mutex
);
1548 hell
[burnin (SCM_PACK ((scm_t_bits
) o
))] = hell
[--n_hell
];
1549 scm_unlock_mutex (hell_mutex
);
1553 SCM_SYMBOL (scm_sym_change_class
, "change-class");
1556 purgatory (void *args
)
1558 return scm_apply_0 (GETVAR (scm_sym_change_class
),
1559 SCM_PACK ((scm_t_bits
) args
));
1562 /* This function calls the generic function change-class for all
1563 * instances which aren't currently undergoing class change.
1567 scm_change_object_class (SCM obj
, SCM old_class SCM_UNUSED
, SCM new_class
)
1570 scm_internal_dynamic_wind (go_to_hell
, purgatory
, go_to_heaven
,
1571 (void *) SCM_UNPACK (scm_list_2 (obj
, new_class
)),
1572 (void *) SCM_UNPACK (obj
));
1575 /******************************************************************************
1581 * GGG E N E R I C F U N C T I O N S
1583 * This implementation provides
1584 * - generic functions (with class specializers)
1587 * - a hard-coded MOP for standard gf, which can be overloaded for non-std gf
1589 ******************************************************************************/
1591 SCM_KEYWORD (k_name
, "name");
1593 SCM_SYMBOL (sym_no_method
, "no-method");
1595 static SCM list_of_no_method
;
1597 SCM_SYMBOL (scm_sym_args
, "args");
1600 scm_make_method_cache (SCM gf
)
1602 return scm_list_5 (SCM_IM_DISPATCH
,
1605 scm_c_make_vector (SCM_INITIAL_MCACHE_SIZE
,
1611 clear_method_cache (SCM gf
)
1613 SCM cache
= scm_make_method_cache (gf
);
1614 SCM_SET_ENTITY_PROCEDURE (gf
, cache
);
1615 SCM_SET_SLOT (gf
, scm_si_used_by
, SCM_BOOL_F
);
1618 SCM_DEFINE (scm_sys_invalidate_method_cache_x
, "%invalidate-method-cache!", 1, 0, 0,
1621 #define FUNC_NAME s_scm_sys_invalidate_method_cache_x
1624 SCM_ASSERT (SCM_PUREGENERICP (gf
), gf
, SCM_ARG1
, FUNC_NAME
);
1625 used_by
= SCM_SLOT (gf
, scm_si_used_by
);
1626 if (!SCM_FALSEP (used_by
))
1628 SCM methods
= SCM_SLOT (gf
, scm_si_methods
);
1629 for (; SCM_CONSP (used_by
); used_by
= SCM_CDR (used_by
))
1630 scm_sys_invalidate_method_cache_x (SCM_CAR (used_by
));
1631 clear_method_cache (gf
);
1632 for (; SCM_CONSP (methods
); methods
= SCM_CDR (methods
))
1633 SCM_SET_SLOT (SCM_CAR (methods
), scm_si_code_table
, SCM_EOL
);
1636 SCM n
= SCM_SLOT (gf
, scm_si_n_specialized
);
1637 /* The sign of n is a flag indicating rest args. */
1638 SCM_SET_MCACHE_N_SPECIALIZED (SCM_ENTITY_PROCEDURE (gf
), n
);
1640 return SCM_UNSPECIFIED
;
1644 SCM_DEFINE (scm_generic_capability_p
, "generic-capability?", 1, 0, 0,
1647 #define FUNC_NAME s_scm_generic_capability_p
1649 SCM_ASSERT (!SCM_FALSEP (scm_procedure_p (proc
)),
1650 proc
, SCM_ARG1
, FUNC_NAME
);
1651 return (scm_subr_p (proc
) && SCM_SUBR_GENERIC (proc
)
1657 SCM_DEFINE (scm_enable_primitive_generic_x
, "enable-primitive-generic!", 0, 0, 1,
1660 #define FUNC_NAME s_scm_enable_primitive_generic_x
1662 SCM_VALIDATE_REST_ARGUMENT (subrs
);
1663 while (!SCM_NULLP (subrs
))
1665 SCM subr
= SCM_CAR (subrs
);
1666 SCM_ASSERT (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
),
1667 subr
, SCM_ARGn
, FUNC_NAME
);
1668 *SCM_SUBR_GENERIC (subr
)
1669 = scm_make (scm_list_3 (scm_class_generic
,
1672 subrs
= SCM_CDR (subrs
);
1674 return SCM_UNSPECIFIED
;
1678 SCM_DEFINE (scm_primitive_generic_generic
, "primitive-generic-generic", 1, 0, 0,
1681 #define FUNC_NAME s_scm_primitive_generic_generic
1683 if (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
))
1685 SCM gf
= *SCM_SUBR_GENERIC (subr
);
1689 SCM_WRONG_TYPE_ARG (SCM_ARG1
, subr
);
1693 /******************************************************************************
1695 * Protocol for calling a generic fumction
1696 * This protocol is roughly equivalent to (parameter are a little bit different
1697 * for efficiency reasons):
1699 * + apply-generic (gf args)
1700 * + compute-applicable-methods (gf args ...)
1701 * + sort-applicable-methods (methods args)
1702 * + apply-methods (gf methods args)
1704 * apply-methods calls make-next-method to build the "continuation" of a a
1705 * method. Applying a next-method will call apply-next-method which in
1706 * turn will call apply again to call effectively the following method.
1708 ******************************************************************************/
1711 applicablep (SCM actual
, SCM formal
)
1713 /* We already know that the cpl is well formed. */
1714 return !SCM_FALSEP (scm_c_memq (formal
, SCM_SLOT (actual
, scm_si_cpl
)));
1718 more_specificp (SCM m1
, SCM m2
, SCM
const *targs
)
1720 register SCM s1
, s2
;
1724 * m1 and m2 can have != length (i.e. one can be one element longer than the
1725 * other when we have a dotted parameter list). For instance, with the call
1728 * (define-method M (a . l) ....)
1729 * (define-method M (a) ....)
1731 * we consider that the second method is more specific.
1733 * BTW, targs is an array of types. We don't need it's size since
1734 * we already know that m1 and m2 are applicable (no risk to go past
1735 * the end of this array).
1738 for (i
=0, s1
=SPEC_OF(m1
), s2
=SPEC_OF(m2
); ; i
++, s1
=SCM_CDR(s1
), s2
=SCM_CDR(s2
)) {
1739 if (SCM_NULLP(s1
)) return 1;
1740 if (SCM_NULLP(s2
)) return 0;
1741 if (SCM_CAR(s1
) != SCM_CAR(s2
)) {
1742 register SCM l
, cs1
= SCM_CAR(s1
), cs2
= SCM_CAR(s2
);
1744 for (l
= SCM_SLOT (targs
[i
], scm_si_cpl
); ; l
= SCM_CDR(l
)) {
1745 if (cs1
== SCM_CAR(l
))
1747 if (cs2
== SCM_CAR(l
))
1750 return 0;/* should not occur! */
1753 return 0; /* should not occur! */
1756 #define BUFFSIZE 32 /* big enough for most uses */
1759 scm_i_vector2list (SCM l
, long len
)
1762 SCM z
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1764 for (j
= 0; j
< len
; j
++, l
= SCM_CDR (l
)) {
1765 SCM_VECTOR_SET (z
, j
, SCM_CAR (l
));
1771 sort_applicable_methods (SCM method_list
, long size
, SCM
const *targs
)
1774 SCM
*v
, vector
= SCM_EOL
;
1775 SCM buffer
[BUFFSIZE
];
1776 SCM save
= method_list
;
1778 /* For reasonably sized method_lists we can try to avoid all the
1779 * consing and reorder the list in place...
1780 * This idea is due to David McClain <Dave_McClain@msn.com>
1782 if (size
<= BUFFSIZE
)
1784 for (i
= 0; i
< size
; i
++)
1786 buffer
[i
] = SCM_CAR (method_list
);
1787 method_list
= SCM_CDR (method_list
);
1793 /* Too many elements in method_list to keep everything locally */
1794 vector
= scm_i_vector2list (save
, size
);
1797 This is a new vector. Don't worry about the write barrier.
1798 We're not allocating elements in this routine, so this should
1801 v
= SCM_WRITABLE_VELTS (vector
);
1804 /* Use a simple shell sort since it is generally faster than qsort on
1805 * small vectors (which is probably mostly the case when we have to
1806 * sort a list of applicable methods).
1808 for (incr
= size
/ 2; incr
; incr
/= 2)
1810 for (i
= incr
; i
< size
; i
++)
1812 for (j
= i
- incr
; j
>= 0; j
-= incr
)
1814 if (more_specificp (v
[j
], v
[j
+incr
], targs
))
1818 SCM tmp
= v
[j
+ incr
];
1826 if (size
<= BUFFSIZE
)
1828 /* We did it in locally, so restore the original list (reordered) in-place */
1829 for (i
= 0, method_list
= save
; i
< size
; i
++, v
++)
1831 SCM_SETCAR (method_list
, *v
);
1832 method_list
= SCM_CDR (method_list
);
1836 /* If we are here, that's that we did it the hard way... */
1837 return scm_vector_to_list (vector
);
1841 scm_compute_applicable_methods (SCM gf
, SCM args
, long len
, int find_method_p
)
1845 SCM l
, fl
, applicable
= SCM_EOL
;
1847 SCM buffer
[BUFFSIZE
];
1852 /* Build the list of arguments types */
1853 if (len
>= BUFFSIZE
) {
1854 tmp
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1855 /* NOTE: Using pointers to malloced memory won't work if we
1856 1. have preemtive threading, and,
1857 2. have a GC which moves objects. */
1858 types
= p
= SCM_WRITABLE_VELTS(tmp
);
1861 note that we don't have to work to reset the generation
1862 count. TMP is a new vector anyway, and it is found
1869 for ( ; !SCM_NULLP (args
); args
= SCM_CDR (args
))
1870 *p
++ = scm_class_of (SCM_CAR (args
));
1872 /* Build a list of all applicable methods */
1873 for (l
= scm_generic_function_methods (gf
); !SCM_NULLP (l
); l
= SCM_CDR (l
))
1875 fl
= SPEC_OF (SCM_CAR (l
));
1876 /* Only accept accessors which match exactly in first arg. */
1877 if (SCM_ACCESSORP (SCM_CAR (l
))
1878 && (SCM_NULLP (fl
) || types
[0] != SCM_CAR (fl
)))
1880 for (i
= 0; ; i
++, fl
= SCM_CDR (fl
))
1882 if (SCM_INSTANCEP (fl
)
1883 /* We have a dotted argument list */
1884 || (i
>= len
&& SCM_NULLP (fl
)))
1885 { /* both list exhausted */
1886 applicable
= scm_cons (SCM_CAR (l
), applicable
);
1892 || !applicablep (types
[i
], SCM_CAR (fl
)))
1901 CALL_GF2 ("no-applicable-method", gf
, save
);
1902 /* if we are here, it's because no-applicable-method hasn't signaled an error */
1906 scm_remember_upto_here_1 (tmp
);
1909 : sort_applicable_methods (applicable
, count
, types
));
1913 SCM_PROC (s_sys_compute_applicable_methods
, "%compute-applicable-methods", 2, 0, 0, scm_sys_compute_applicable_methods
);
1916 static const char s_sys_compute_applicable_methods
[] = "%compute-applicable-methods";
1919 scm_sys_compute_applicable_methods (SCM gf
, SCM args
)
1920 #define FUNC_NAME s_sys_compute_applicable_methods
1923 SCM_VALIDATE_GENERIC (1, gf
);
1924 n
= scm_ilength (args
);
1925 SCM_ASSERT (n
>= 0, args
, SCM_ARG2
, FUNC_NAME
);
1926 return scm_compute_applicable_methods (gf
, args
, n
, 1);
1930 SCM_SYMBOL (sym_compute_applicable_methods
, "compute-applicable-methods");
1931 SCM_VARIABLE_INIT (var_compute_applicable_methods
, "compute-applicable-methods", scm_c_define_gsubr (s_sys_compute_applicable_methods
, 2, 0, 0, scm_sys_compute_applicable_methods
));
1933 SCM_SYNTAX (s_atslot_ref
, "@slot-ref", scm_makmmacro
, scm_m_atslot_ref
);
1936 scm_m_atslot_ref (SCM xorig
, SCM env SCM_UNUSED
)
1937 #define FUNC_NAME s_atslot_ref
1939 SCM x
= SCM_CDR (xorig
);
1940 SCM_ASSYNT (scm_ilength (x
) == 2, scm_s_expression
, FUNC_NAME
);
1941 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1942 return scm_cons (SCM_IM_SLOT_REF
, x
);
1947 SCM_SYNTAX (s_atslot_set_x
, "@slot-set!", scm_makmmacro
, scm_m_atslot_set_x
);
1950 scm_m_atslot_set_x (SCM xorig
, SCM env SCM_UNUSED
)
1951 #define FUNC_NAME s_atslot_set_x
1953 SCM x
= SCM_CDR (xorig
);
1954 SCM_ASSYNT (scm_ilength (x
) == 3, scm_s_expression
, FUNC_NAME
);
1955 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1956 return scm_cons (SCM_IM_SLOT_SET_X
, x
);
1961 SCM_SYNTAX (s_atdispatch
, "@dispatch", scm_makmmacro
, scm_m_atdispatch
);
1963 SCM_SYMBOL (sym_atdispatch
, s_atdispatch
);
1966 scm_m_atdispatch (SCM xorig
, SCM env
)
1967 #define FUNC_NAME s_atdispatch
1969 SCM args
, n
, v
, gf
, x
= SCM_CDR (xorig
);
1970 SCM_ASSYNT (scm_ilength (x
) == 4, scm_s_expression
, FUNC_NAME
);
1972 if (!SCM_CONSP (args
) && !SCM_SYMBOLP (args
))
1973 SCM_WRONG_TYPE_ARG (SCM_ARG1
, args
);
1975 n
= SCM_XEVALCAR (x
, env
);
1976 SCM_VALIDATE_INUM (SCM_ARG2
, n
);
1977 SCM_ASSERT_RANGE (0, n
, SCM_INUM (n
) >= 1);
1979 v
= SCM_XEVALCAR (x
, env
);
1980 SCM_VALIDATE_VECTOR (SCM_ARG3
, v
);
1982 gf
= SCM_XEVALCAR (x
, env
);
1983 SCM_VALIDATE_PUREGENERIC (SCM_ARG4
, gf
);
1984 return scm_list_5 (SCM_IM_DISPATCH
, args
, n
, v
, gf
);
1990 lock_cache_mutex (void *m
)
1992 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
1993 scm_lock_mutex (mutex
);
1997 unlock_cache_mutex (void *m
)
1999 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
2000 scm_unlock_mutex (mutex
);
2004 call_memoize_method (void *a
)
2006 SCM args
= SCM_PACK ((scm_t_bits
) a
);
2007 SCM gf
= SCM_CAR (args
);
2008 SCM x
= SCM_CADR (args
);
2009 /* First check if another thread has inserted a method between
2010 * the cache miss and locking the mutex.
2012 SCM cmethod
= scm_mcache_lookup_cmethod (x
, SCM_CDDR (args
));
2013 if (!SCM_FALSEP (cmethod
))
2015 /*fixme* Use scm_apply */
2016 return CALL_GF3 ("memoize-method!", gf
, SCM_CDDR (args
), x
);
2020 scm_memoize_method (SCM x
, SCM args
)
2022 SCM gf
= SCM_CAR (scm_last_pair (x
));
2023 return scm_internal_dynamic_wind (
2025 call_memoize_method
,
2027 (void *) SCM_UNPACK (scm_cons2 (gf
, x
, args
)),
2028 (void *) SCM_UNPACK (SCM_SLOT (gf
, scm_si_cache_mutex
)));
2031 /******************************************************************************
2033 * A simple make (which will be redefined later in Scheme)
2034 * This version handles only creation of gf, methods and classes (no instances)
2036 * Since this code will disappear when Goops will be fully booted,
2037 * no precaution is taken to be efficient.
2039 ******************************************************************************/
2041 SCM_KEYWORD (k_setter
, "setter");
2042 SCM_KEYWORD (k_specializers
, "specializers");
2043 SCM_KEYWORD (k_procedure
, "procedure");
2044 SCM_KEYWORD (k_dsupers
, "dsupers");
2045 SCM_KEYWORD (k_slots
, "slots");
2046 SCM_KEYWORD (k_gf
, "generic-function");
2048 SCM_DEFINE (scm_make
, "make", 0, 0, 1,
2050 "Make a new object. @var{args} must contain the class and\n"
2051 "all necessary initialization information.")
2052 #define FUNC_NAME s_scm_make
2055 long len
= scm_ilength (args
);
2057 if (len
<= 0 || (len
& 1) == 0)
2058 SCM_WRONG_NUM_ARGS ();
2060 class = SCM_CAR(args
);
2061 args
= SCM_CDR(args
);
2063 if (class == scm_class_generic
|| class == scm_class_generic_with_setter
)
2065 z
= scm_make_struct (class, SCM_INUM0
,
2066 scm_list_5 (SCM_EOL
,
2071 scm_set_procedure_property_x (z
, scm_sym_name
,
2072 scm_get_keyword (k_name
,
2075 clear_method_cache (z
);
2076 if (class == scm_class_generic_with_setter
)
2078 SCM setter
= scm_get_keyword (k_setter
, args
, SCM_BOOL_F
);
2079 if (!SCM_FALSEP (setter
))
2080 scm_sys_set_object_setter_x (z
, setter
);
2085 z
= scm_sys_allocate_instance (class, args
);
2087 if (class == scm_class_method
2088 || class == scm_class_simple_method
2089 || class == scm_class_accessor
)
2091 SCM_SET_SLOT (z
, scm_si_generic_function
,
2092 scm_i_get_keyword (k_gf
,
2097 SCM_SET_SLOT (z
, scm_si_specializers
,
2098 scm_i_get_keyword (k_specializers
,
2103 SCM_SET_SLOT (z
, scm_si_procedure
,
2104 scm_i_get_keyword (k_procedure
,
2109 SCM_SET_SLOT (z
, scm_si_code_table
, SCM_EOL
);
2113 /* In all the others case, make a new class .... No instance here */
2114 SCM_SET_SLOT (z
, scm_si_name
,
2115 scm_i_get_keyword (k_name
,
2118 scm_str2symbol ("???"),
2120 SCM_SET_SLOT (z
, scm_si_direct_supers
,
2121 scm_i_get_keyword (k_dsupers
,
2126 SCM_SET_SLOT (z
, scm_si_direct_slots
,
2127 scm_i_get_keyword (k_slots
,
2138 SCM_DEFINE (scm_find_method
, "find-method", 0, 0, 1,
2141 #define FUNC_NAME s_scm_find_method
2144 long len
= scm_ilength (l
);
2147 SCM_WRONG_NUM_ARGS ();
2149 gf
= SCM_CAR(l
); l
= SCM_CDR(l
);
2150 SCM_VALIDATE_GENERIC (1, gf
);
2151 if (SCM_NULLP (SCM_SLOT (gf
, scm_si_methods
)))
2152 SCM_MISC_ERROR ("no methods for generic ~S", scm_list_1 (gf
));
2154 return scm_compute_applicable_methods (gf
, l
, len
- 1, 1);
2158 SCM_DEFINE (scm_sys_method_more_specific_p
, "%method-more-specific?", 3, 0, 0,
2159 (SCM m1
, SCM m2
, SCM targs
),
2161 #define FUNC_NAME s_scm_sys_method_more_specific_p
2166 SCM_VALIDATE_METHOD (1, m1
);
2167 SCM_VALIDATE_METHOD (2, m2
);
2168 SCM_ASSERT ((len
= scm_ilength (targs
)) != -1, targs
, SCM_ARG3
, FUNC_NAME
);
2170 /* Verify that all the arguments of targs are classes and place them in a vector*/
2171 v
= scm_c_make_vector (len
, SCM_EOL
);
2173 for (i
= 0, l
= targs
; !SCM_NULLP (l
); i
++, l
= SCM_CDR (l
)) {
2174 SCM_ASSERT (SCM_CLASSP (SCM_CAR (l
)), targs
, SCM_ARG3
, FUNC_NAME
);
2175 SCM_VECTOR_SET (v
, i
, SCM_CAR(l
));
2177 return more_specificp (m1
, m2
, SCM_VELTS(v
)) ? SCM_BOOL_T
: SCM_BOOL_F
;
2183 /******************************************************************************
2187 ******************************************************************************/
2191 make_stdcls (SCM
*var
, char *name
, SCM meta
, SCM super
, SCM slots
)
2193 SCM tmp
= scm_str2symbol (name
);
2195 *var
= scm_permanent_object (scm_basic_make_class (meta
,
2199 : scm_list_1 (super
),
2205 SCM_KEYWORD (k_slot_definition
, "slot-definition");
2208 create_standard_classes (void)
2211 SCM method_slots
= scm_list_4 (scm_str2symbol ("generic-function"),
2212 scm_str2symbol ("specializers"),
2214 scm_str2symbol ("code-table"));
2215 SCM amethod_slots
= scm_list_1 (scm_list_3 (scm_str2symbol ("slot-definition"),
2217 k_slot_definition
));
2218 SCM mutex_slot
= scm_list_1 (scm_str2symbol ("make-mutex"));
2219 SCM gf_slots
= scm_list_5 (scm_str2symbol ("methods"),
2220 scm_list_3 (scm_str2symbol ("n-specialized"),
2223 scm_list_3 (scm_str2symbol ("used-by"),
2226 scm_list_3 (scm_str2symbol ("cache-mutex"),
2228 scm_closure (scm_list_2 (SCM_EOL
,
2231 scm_list_3 (scm_str2symbol ("extended-by"),
2234 SCM egf_slots
= scm_list_1 (scm_list_3 (scm_str2symbol ("extends"),
2237 /* Foreign class slot classes */
2238 make_stdcls (&scm_class_foreign_slot
, "<foreign-slot>",
2239 scm_class_class
, scm_class_top
, SCM_EOL
);
2240 make_stdcls (&scm_class_protected
, "<protected-slot>",
2241 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2242 make_stdcls (&scm_class_opaque
, "<opaque-slot>",
2243 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2244 make_stdcls (&scm_class_read_only
, "<read-only-slot>",
2245 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2246 make_stdcls (&scm_class_self
, "<self-slot>",
2248 scm_list_2 (scm_class_foreign_slot
, scm_class_read_only
),
2250 make_stdcls (&scm_class_protected_opaque
, "<protected-opaque-slot>",
2252 scm_list_2 (scm_class_protected
, scm_class_opaque
),
2254 make_stdcls (&scm_class_protected_read_only
, "<protected-read-only-slot>",
2256 scm_list_2 (scm_class_protected
, scm_class_read_only
),
2258 make_stdcls (&scm_class_scm
, "<scm-slot>",
2259 scm_class_class
, scm_class_protected
, SCM_EOL
);
2260 make_stdcls (&scm_class_int
, "<int-slot>",
2261 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2262 make_stdcls (&scm_class_float
, "<float-slot>",
2263 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2264 make_stdcls (&scm_class_double
, "<double-slot>",
2265 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2267 /* Continue initialization of class <class> */
2269 slots
= build_class_class_slots ();
2270 SCM_SET_SLOT (scm_class_class
, scm_si_direct_slots
, slots
);
2271 SCM_SET_SLOT (scm_class_class
, scm_si_slots
, slots
);
2272 SCM_SET_SLOT (scm_class_class
, scm_si_getters_n_setters
,
2273 compute_getters_n_setters (slots
));
2275 make_stdcls (&scm_class_foreign_class
, "<foreign-class>",
2276 scm_class_class
, scm_class_class
,
2277 scm_list_2 (scm_list_3 (scm_str2symbol ("constructor"),
2280 scm_list_3 (scm_str2symbol ("destructor"),
2282 scm_class_opaque
)));
2283 make_stdcls (&scm_class_foreign_object
, "<foreign-object>",
2284 scm_class_foreign_class
, scm_class_object
, SCM_EOL
);
2285 SCM_SET_CLASS_FLAGS (scm_class_foreign_object
, SCM_CLASSF_FOREIGN
);
2287 /* scm_class_generic functions classes */
2288 make_stdcls (&scm_class_procedure_class
, "<procedure-class>",
2289 scm_class_class
, scm_class_class
, SCM_EOL
);
2290 make_stdcls (&scm_class_entity_class
, "<entity-class>",
2291 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2292 make_stdcls (&scm_class_operator_class
, "<operator-class>",
2293 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2294 make_stdcls (&scm_class_operator_with_setter_class
,
2295 "<operator-with-setter-class>",
2296 scm_class_class
, scm_class_operator_class
, SCM_EOL
);
2297 make_stdcls (&scm_class_method
, "<method>",
2298 scm_class_class
, scm_class_object
, method_slots
);
2299 make_stdcls (&scm_class_simple_method
, "<simple-method>",
2300 scm_class_class
, scm_class_method
, SCM_EOL
);
2301 SCM_SET_CLASS_FLAGS (scm_class_simple_method
, SCM_CLASSF_SIMPLE_METHOD
);
2302 make_stdcls (&scm_class_accessor
, "<accessor-method>",
2303 scm_class_class
, scm_class_simple_method
, amethod_slots
);
2304 SCM_SET_CLASS_FLAGS (scm_class_accessor
, SCM_CLASSF_ACCESSOR_METHOD
);
2305 make_stdcls (&scm_class_entity
, "<entity>",
2306 scm_class_entity_class
, scm_class_object
, SCM_EOL
);
2307 make_stdcls (&scm_class_entity_with_setter
, "<entity-with-setter>",
2308 scm_class_entity_class
, scm_class_entity
, SCM_EOL
);
2309 make_stdcls (&scm_class_generic
, "<generic>",
2310 scm_class_entity_class
, scm_class_entity
, gf_slots
);
2311 SCM_SET_CLASS_FLAGS (scm_class_generic
, SCM_CLASSF_PURE_GENERIC
);
2312 make_stdcls (&scm_class_extended_generic
, "<extended-generic>",
2313 scm_class_entity_class
,
2314 scm_list_1 (scm_class_generic
),
2316 SCM_SET_CLASS_FLAGS (scm_class_extended_generic
, SCM_CLASSF_PURE_GENERIC
);
2317 make_stdcls (&scm_class_generic_with_setter
, "<generic-with-setter>",
2318 scm_class_entity_class
,
2319 scm_list_2 (scm_class_generic
, scm_class_entity_with_setter
),
2321 SCM_SET_CLASS_FLAGS (scm_class_generic_with_setter
, SCM_CLASSF_PURE_GENERIC
);
2322 make_stdcls (&scm_class_extended_generic_with_setter
,
2323 "<extended-generic-with-setter>",
2324 scm_class_entity_class
,
2325 scm_list_2 (scm_class_extended_generic
,
2326 scm_class_entity_with_setter
),
2328 SCM_SET_CLASS_FLAGS (scm_class_extended_generic_with_setter
,
2329 SCM_CLASSF_PURE_GENERIC
);
2331 /* Primitive types classes */
2332 make_stdcls (&scm_class_boolean
, "<boolean>",
2333 scm_class_class
, scm_class_top
, SCM_EOL
);
2334 make_stdcls (&scm_class_char
, "<char>",
2335 scm_class_class
, scm_class_top
, SCM_EOL
);
2336 make_stdcls (&scm_class_list
, "<list>",
2337 scm_class_class
, scm_class_top
, SCM_EOL
);
2338 make_stdcls (&scm_class_pair
, "<pair>",
2339 scm_class_class
, scm_class_list
, SCM_EOL
);
2340 make_stdcls (&scm_class_null
, "<null>",
2341 scm_class_class
, scm_class_list
, SCM_EOL
);
2342 make_stdcls (&scm_class_string
, "<string>",
2343 scm_class_class
, scm_class_top
, SCM_EOL
);
2344 make_stdcls (&scm_class_symbol
, "<symbol>",
2345 scm_class_class
, scm_class_top
, SCM_EOL
);
2346 make_stdcls (&scm_class_vector
, "<vector>",
2347 scm_class_class
, scm_class_top
, SCM_EOL
);
2348 make_stdcls (&scm_class_number
, "<number>",
2349 scm_class_class
, scm_class_top
, SCM_EOL
);
2350 make_stdcls (&scm_class_complex
, "<complex>",
2351 scm_class_class
, scm_class_number
, SCM_EOL
);
2352 make_stdcls (&scm_class_real
, "<real>",
2353 scm_class_class
, scm_class_complex
, SCM_EOL
);
2354 make_stdcls (&scm_class_integer
, "<integer>",
2355 scm_class_class
, scm_class_real
, SCM_EOL
);
2356 make_stdcls (&scm_class_keyword
, "<keyword>",
2357 scm_class_class
, scm_class_top
, SCM_EOL
);
2358 make_stdcls (&scm_class_unknown
, "<unknown>",
2359 scm_class_class
, scm_class_top
, SCM_EOL
);
2360 make_stdcls (&scm_class_procedure
, "<procedure>",
2361 scm_class_procedure_class
, scm_class_top
, SCM_EOL
);
2362 make_stdcls (&scm_class_procedure_with_setter
, "<procedure-with-setter>",
2363 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2364 make_stdcls (&scm_class_primitive_generic
, "<primitive-generic>",
2365 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2366 make_stdcls (&scm_class_port
, "<port>",
2367 scm_class_class
, scm_class_top
, SCM_EOL
);
2368 make_stdcls (&scm_class_input_port
, "<input-port>",
2369 scm_class_class
, scm_class_port
, SCM_EOL
);
2370 make_stdcls (&scm_class_output_port
, "<output-port>",
2371 scm_class_class
, scm_class_port
, SCM_EOL
);
2372 make_stdcls (&scm_class_input_output_port
, "<input-output-port>",
2374 scm_list_2 (scm_class_input_port
, scm_class_output_port
),
2378 /**********************************************************************
2382 **********************************************************************/
2385 make_class_from_template (char *template, char *type_name
, SCM supers
)
2391 sprintf (buffer
, template, type_name
);
2392 name
= scm_str2symbol (buffer
);
2395 name
= SCM_GOOPS_UNBOUND
;
2397 class = scm_permanent_object (scm_basic_make_class (scm_class_class
,
2402 /* Only define name if doesn't already exist. */
2403 if (!SCM_GOOPS_UNBOUNDP (name
)
2404 && SCM_FALSEP (scm_call_2 (scm_goops_lookup_closure
, name
, SCM_BOOL_F
)))
2405 DEFVAR (name
, class);
2410 scm_make_extended_class (char *type_name
)
2412 return make_class_from_template ("<%s>",
2414 scm_list_1 (scm_class_top
));
2418 create_smob_classes (void)
2422 scm_smob_class
= (SCM
*) scm_malloc (255 * sizeof (SCM
));
2423 for (i
= 0; i
< 255; ++i
)
2424 scm_smob_class
[i
] = 0;
2426 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_big
)] = scm_class_integer
;
2427 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_real
)] = scm_class_real
;
2428 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_complex
)] = scm_class_complex
;
2429 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_keyword
)] = scm_class_keyword
;
2431 for (i
= 0; i
< scm_numsmob
; ++i
)
2432 if (!scm_smob_class
[i
])
2433 scm_smob_class
[i
] = scm_make_extended_class (SCM_SMOBNAME (i
));
2437 scm_make_port_classes (long ptobnum
, char *type_name
)
2439 SCM c
, class = make_class_from_template ("<%s-port>",
2441 scm_list_1 (scm_class_port
));
2442 scm_port_class
[SCM_IN_PCLASS_INDEX
+ ptobnum
]
2443 = make_class_from_template ("<%s-input-port>",
2445 scm_list_2 (class, scm_class_input_port
));
2446 scm_port_class
[SCM_OUT_PCLASS_INDEX
+ ptobnum
]
2447 = make_class_from_template ("<%s-output-port>",
2449 scm_list_2 (class, scm_class_output_port
));
2450 scm_port_class
[SCM_INOUT_PCLASS_INDEX
+ ptobnum
]
2452 = make_class_from_template ("<%s-input-output-port>",
2454 scm_list_2 (class, scm_class_input_output_port
));
2455 /* Patch cpl (since this tree is too complex for the C level compute-cpl) */
2456 SCM_SET_SLOT (c
, scm_si_cpl
,
2457 scm_cons2 (c
, class, SCM_SLOT (scm_class_input_output_port
, scm_si_cpl
)));
2461 create_port_classes (void)
2465 scm_port_class
= (SCM
*) scm_malloc (3 * 256 * sizeof (SCM
));
2466 for (i
= 0; i
< 3 * 256; ++i
)
2467 scm_port_class
[i
] = 0;
2469 for (i
= 0; i
< scm_numptob
; ++i
)
2470 scm_make_port_classes (i
, SCM_PTOBNAME (i
));
2474 make_struct_class (void *closure SCM_UNUSED
, SCM key SCM_UNUSED
,
2475 SCM data
, SCM prev SCM_UNUSED
)
2477 if (!SCM_FALSEP (SCM_STRUCT_TABLE_NAME (data
)))
2478 SCM_SET_STRUCT_TABLE_CLASS (data
,
2479 scm_make_extended_class
2480 (SCM_SYMBOL_CHARS (SCM_STRUCT_TABLE_NAME (data
))));
2481 return SCM_UNSPECIFIED
;
2485 create_struct_classes (void)
2487 scm_internal_hash_fold (make_struct_class
, 0, SCM_BOOL_F
, scm_struct_table
);
2490 /**********************************************************************
2494 **********************************************************************/
2499 if (!goops_loaded_p
)
2500 scm_c_resolve_module ("oop goops");
2505 scm_make_foreign_object (SCM
class, SCM initargs
)
2506 #define FUNC_NAME s_scm_make
2508 void * (*constructor
) (SCM
)
2509 = (void * (*) (SCM
)) SCM_SLOT (class, scm_si_constructor
);
2510 if (constructor
== 0)
2511 SCM_MISC_ERROR ("Can't make instances of class ~S", scm_list_1 (class));
2512 return scm_wrap_object (class, constructor (initargs
));
2518 scm_free_foreign_object (SCM
*class, SCM
*data
)
2520 size_t (*destructor
) (void *)
2521 = (size_t (*) (void *)) class[scm_si_destructor
];
2522 return destructor (data
);
2526 scm_make_class (SCM meta
, char *s_name
, SCM supers
, size_t size
,
2527 void * (*constructor
) (SCM initargs
),
2528 size_t (*destructor
) (void *))
2531 name
= scm_str2symbol (s_name
);
2532 if (SCM_NULLP (supers
))
2533 supers
= scm_list_1 (scm_class_foreign_object
);
2534 class = scm_basic_basic_make_class (meta
, name
, supers
, SCM_EOL
);
2535 scm_sys_inherit_magic_x (class, supers
);
2537 if (destructor
!= 0)
2539 SCM_SET_SLOT (class, scm_si_destructor
, (SCM
) destructor
);
2540 SCM_SET_CLASS_DESTRUCTOR (class, scm_free_foreign_object
);
2544 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
2545 SCM_SET_CLASS_INSTANCE_SIZE (class, size
);
2548 SCM_SET_SLOT (class, scm_si_layout
, scm_str2symbol (""));
2549 SCM_SET_SLOT (class, scm_si_constructor
, (SCM
) constructor
);
2554 SCM_SYMBOL (sym_o
, "o");
2555 SCM_SYMBOL (sym_x
, "x");
2557 SCM_KEYWORD (k_accessor
, "accessor");
2558 SCM_KEYWORD (k_getter
, "getter");
2561 default_setter (SCM obj SCM_UNUSED
, SCM c SCM_UNUSED
)
2563 scm_misc_error ("slot-set!", "read-only slot", SCM_EOL
);
2568 scm_add_slot (SCM
class, char *slot_name
, SCM slot_class
,
2569 SCM (*getter
) (SCM obj
),
2570 SCM (*setter
) (SCM obj
, SCM x
),
2571 char *accessor_name
)
2574 SCM get
= scm_c_make_subr ("goops:get", scm_tc7_subr_1
, getter
);
2575 SCM set
= scm_c_make_subr ("goops:set", scm_tc7_subr_2
,
2576 setter
? setter
: default_setter
);
2577 SCM getm
= scm_closure (scm_list_2 (scm_list_1 (sym_o
),
2578 scm_list_2 (get
, sym_o
)),
2580 SCM setm
= scm_closure (scm_list_2 (scm_list_2 (sym_o
, sym_x
),
2581 scm_list_3 (set
, sym_o
, sym_x
)),
2584 SCM name
= scm_str2symbol (slot_name
);
2585 SCM aname
= scm_str2symbol (accessor_name
);
2586 SCM gf
= scm_ensure_accessor (aname
);
2587 SCM slot
= scm_list_5 (name
,
2590 setter
? k_accessor
: k_getter
,
2592 SCM gns
= scm_list_4 (name
, SCM_BOOL_F
, get
, set
);
2594 scm_add_method (gf
, scm_make (scm_list_5 (scm_class_accessor
,
2599 scm_add_method (scm_setter (gf
),
2600 scm_make (scm_list_5 (scm_class_accessor
,
2602 scm_list_2 (class, scm_class_top
),
2607 SCM_SET_SLOT (class, scm_si_slots
,
2608 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_slots
),
2609 scm_list_1 (slot
))));
2610 SCM_SET_SLOT (class, scm_si_getters_n_setters
,
2611 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_getters_n_setters
),
2612 scm_list_1 (gns
))));
2616 long n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
2618 SCM_SET_SLOT (class, scm_si_nfields
, SCM_MAKINUM (n
+ 1));
2623 scm_wrap_object (SCM
class, void *data
)
2625 return scm_double_cell (SCM_UNPACK (SCM_CDR (class)) | scm_tc3_struct
,
2633 scm_wrap_component (SCM
class, SCM container
, void *data
)
2635 SCM obj
= scm_wrap_object (class, data
);
2636 SCM handle
= scm_hash_fn_create_handle_x (scm_components
,
2642 SCM_SETCDR (handle
, container
);
2647 scm_ensure_accessor (SCM name
)
2649 SCM gf
= scm_call_2 (SCM_TOP_LEVEL_LOOKUP_CLOSURE
, name
, SCM_BOOL_F
);
2650 if (!SCM_IS_A_P (gf
, scm_class_generic_with_setter
))
2652 gf
= scm_make (scm_list_3 (scm_class_generic
, k_name
, name
));
2653 gf
= scm_make (scm_list_5 (scm_class_generic_with_setter
,
2654 k_name
, name
, k_setter
, gf
));
2659 SCM_SYMBOL (sym_internal_add_method_x
, "internal-add-method!");
2662 scm_add_method (SCM gf
, SCM m
)
2664 scm_eval (scm_list_3 (sym_internal_add_method_x
, gf
, m
), scm_module_goops
);
2669 * Debugging utilities
2672 SCM_DEFINE (scm_pure_generic_p
, "pure-generic?", 1, 0, 0,
2674 "Return @code{#t} if @var{obj} is a pure generic.")
2675 #define FUNC_NAME s_scm_pure_generic_p
2677 return SCM_BOOL (SCM_PUREGENERICP (obj
));
2681 #endif /* GUILE_DEBUG */
2687 SCM_DEFINE (scm_sys_goops_loaded
, "%goops-loaded", 0, 0, 0,
2689 "Announce that GOOPS is loaded and perform initialization\n"
2690 "on the C level which depends on the loaded GOOPS modules.")
2691 #define FUNC_NAME s_scm_sys_goops_loaded
2694 var_compute_applicable_methods
=
2695 scm_sym2var (sym_compute_applicable_methods
, scm_goops_lookup_closure
,
2697 return SCM_UNSPECIFIED
;
2701 SCM scm_module_goops
;
2704 scm_init_goops_builtins (void)
2706 scm_module_goops
= scm_current_module ();
2707 scm_goops_lookup_closure
= scm_module_lookup_closure (scm_module_goops
);
2709 /* Not really necessary right now, but who knows...
2711 scm_permanent_object (scm_module_goops
);
2712 scm_permanent_object (scm_goops_lookup_closure
);
2714 scm_components
= scm_permanent_object (scm_make_weak_key_hash_table
2715 (SCM_MAKINUM (37)));
2717 goops_rstate
= scm_c_make_rstate ("GOOPS", 5);
2719 #include "libguile/goops.x"
2721 list_of_no_method
= scm_permanent_object (scm_list_1 (sym_no_method
));
2723 hell
= scm_malloc (hell_size
);
2724 hell_mutex
= scm_permanent_object (scm_make_mutex ());
2726 create_basic_classes ();
2727 create_standard_classes ();
2728 create_smob_classes ();
2729 create_struct_classes ();
2730 create_port_classes ();
2733 SCM name
= scm_str2symbol ("no-applicable-method");
2734 scm_no_applicable_method
2735 = scm_permanent_object (scm_make (scm_list_3 (scm_class_generic
,
2738 DEFVAR (name
, scm_no_applicable_method
);
2741 return SCM_UNSPECIFIED
;
2747 scm_c_define_gsubr ("%init-goops-builtins", 0, 0, 0,
2748 scm_init_goops_builtins
);