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/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 CALL_GF3 ("change-object-class", \
123 obj, class, SCM_OBJ_CLASS_REDEF (obj)); \
126 #define NXT_MTHD_METHODS(m) (SCM_VELTS (m)[1])
127 #define NXT_MTHD_ARGS(m) (SCM_VELTS (m)[2])
129 #define SCM_GOOPS_UNBOUND SCM_UNBOUND
130 #define SCM_GOOPS_UNBOUNDP(x) ((x) == SCM_GOOPS_UNBOUND)
132 static int goops_loaded_p
= 0;
133 static scm_t_rstate
*goops_rstate
;
135 static SCM scm_goops_lookup_closure
;
137 /* Some classes are defined in libguile/objects.c. */
138 SCM scm_class_top
, scm_class_object
, scm_class_class
;
139 SCM scm_class_entity
, scm_class_entity_with_setter
;
140 SCM scm_class_generic
, scm_class_generic_with_setter
, scm_class_method
;
141 SCM scm_class_simple_method
, scm_class_accessor
;
142 SCM scm_class_procedure_class
;
143 SCM scm_class_operator_class
, scm_class_operator_with_setter_class
;
144 SCM scm_class_entity_class
;
145 SCM scm_class_number
, scm_class_list
;
146 SCM scm_class_keyword
;
147 SCM scm_class_port
, scm_class_input_output_port
;
148 SCM scm_class_input_port
, scm_class_output_port
;
149 SCM scm_class_foreign_class
, scm_class_foreign_object
;
150 SCM scm_class_foreign_slot
;
151 SCM scm_class_self
, scm_class_protected
;
152 SCM scm_class_opaque
, scm_class_read_only
;
153 SCM scm_class_protected_opaque
, scm_class_protected_read_only
;
155 SCM scm_class_int
, scm_class_float
, scm_class_double
;
157 SCM_SYMBOL (scm_sym_define_public
, "define-public");
159 static SCM
scm_make_unbound (void);
160 static SCM
scm_unbound_p (SCM obj
);
161 static SCM
scm_assert_bound (SCM value
, SCM obj
);
162 static SCM
scm_at_assert_bound_ref (SCM obj
, SCM index
);
163 static SCM
scm_sys_goops_loaded (void);
165 /******************************************************************************
169 * This version doesn't handle multiple-inheritance. It serves only for
170 * booting classes and will be overloaded in Scheme
172 ******************************************************************************/
176 compute_cpl (SCM supers
, SCM res
)
178 return (SCM_NULLP (supers
)
180 : compute_cpl (SCM_SLOT (SCM_CAR (supers
), scm_si_direct_supers
),
181 scm_cons (SCM_CAR (supers
), res
)));
186 map (SCM (*proc
) (SCM
), SCM ls
)
192 SCM res
= scm_cons (proc (SCM_CAR (ls
)), SCM_EOL
);
195 while (!SCM_NULLP (ls
))
197 SCM_SETCDR (h
, scm_cons (proc (SCM_CAR (ls
)), SCM_EOL
));
209 while (!SCM_NULLP (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_list_1 (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_NULLP (cpl
); cpl
= SCM_CDR (cpl
))
265 res
= scm_append (scm_list_2 (SCM_SLOT (SCM_CAR (cpl
),
266 scm_si_direct_slots
),
269 /* res contains a list of slots. Remove slots which appears more than once */
270 return remove_duplicate_slots (scm_reverse (res
), SCM_EOL
, SCM_EOL
);
277 while (!SCM_NULLP (ls
))
279 if (!SCM_CONSP (SCM_CAR (ls
)))
280 SCM_SETCAR (ls
, scm_cons (SCM_CAR (ls
), SCM_EOL
));
287 SCM_DEFINE (scm_sys_compute_slots
, "%compute-slots", 1, 0, 0,
289 "Return a list consisting of the names of all slots belonging to\n"
290 "class @var{class}, i. e. the slots of @var{class} and of all of\n"
292 #define FUNC_NAME s_scm_sys_compute_slots
294 SCM_VALIDATE_CLASS (1, class);
295 return build_slots_list (SCM_SLOT (class, scm_si_direct_slots
),
296 SCM_SLOT (class, scm_si_cpl
));
301 /******************************************************************************
303 * compute-getters-n-setters
305 * This version doesn't handle slot options. It serves only for booting
306 * classes and will be overloaded in Scheme.
308 ******************************************************************************/
310 SCM_KEYWORD (k_init_value
, "init-value");
311 SCM_KEYWORD (k_init_thunk
, "init-thunk");
314 compute_getters_n_setters (SCM slots
)
320 for ( ; !SCM_NULLP (slots
); slots
= SCM_CDR (slots
))
322 SCM init
= SCM_BOOL_F
;
323 SCM options
= SCM_CDAR (slots
);
324 if (!SCM_NULLP (options
))
326 init
= scm_get_keyword (k_init_value
, options
, 0);
328 init
= scm_closure (scm_list_2 (SCM_EOL
, init
), SCM_EOL
);
330 init
= scm_get_keyword (k_init_thunk
, options
, SCM_BOOL_F
);
332 *cdrloc
= scm_cons (scm_cons (SCM_CAAR (slots
),
336 cdrloc
= SCM_CDRLOC (*cdrloc
);
341 /******************************************************************************
345 ******************************************************************************/
347 /*fixme* Manufacture keywords in advance */
349 scm_i_get_keyword (SCM key
, SCM l
, long len
, SCM default_value
, const char *subr
)
353 for (i
= 0; i
!= len
; i
+= 2)
355 SCM obj
= SCM_CAR (l
);
357 if (!SCM_KEYWORDP (obj
))
358 scm_misc_error (subr
, "bad keyword: ~S", scm_list_1 (obj
));
359 else if (SCM_EQ_P (obj
, key
))
365 return default_value
;
369 SCM_DEFINE (scm_get_keyword
, "get-keyword", 3, 0, 0,
370 (SCM key
, SCM l
, SCM default_value
),
371 "Determine an associated value for the keyword @var{key} from\n"
372 "the list @var{l}. The list @var{l} has to consist of an even\n"
373 "number of elements, where, starting with the first, every\n"
374 "second element is a keyword, followed by its associated value.\n"
375 "If @var{l} does not hold a value for @var{key}, the value\n"
376 "@var{default_value} is returned.")
377 #define FUNC_NAME s_scm_get_keyword
381 SCM_ASSERT (SCM_KEYWORDP (key
), key
, SCM_ARG1
, FUNC_NAME
);
382 len
= scm_ilength (l
);
383 if (len
< 0 || len
% 2 == 1)
384 scm_misc_error (FUNC_NAME
, "Bad keyword-value list: ~S", scm_list_1 (l
));
386 return scm_i_get_keyword (key
, l
, len
, default_value
, FUNC_NAME
);
391 SCM_KEYWORD (k_init_keyword
, "init-keyword");
393 static SCM
get_slot_value (SCM
class, SCM obj
, SCM slotdef
);
394 static SCM
set_slot_value (SCM
class, SCM obj
, SCM slotdef
, SCM value
);
396 SCM_DEFINE (scm_sys_initialize_object
, "%initialize-object", 2, 0, 0,
397 (SCM obj
, SCM initargs
),
398 "Initialize the object @var{obj} with the given arguments\n"
400 #define FUNC_NAME s_scm_sys_initialize_object
402 SCM tmp
, get_n_set
, slots
;
403 SCM
class = SCM_CLASS_OF (obj
);
406 SCM_VALIDATE_INSTANCE (1, obj
);
407 n_initargs
= scm_ilength (initargs
);
408 SCM_ASSERT ((n_initargs
& 1) == 0, initargs
, SCM_ARG2
, FUNC_NAME
);
410 get_n_set
= SCM_SLOT (class, scm_si_getters_n_setters
);
411 slots
= SCM_SLOT (class, scm_si_slots
);
413 /* See for each slot how it must be initialized */
416 get_n_set
= SCM_CDR (get_n_set
), slots
= SCM_CDR (slots
))
418 SCM slot_name
= SCM_CAR (slots
);
421 if (!SCM_NULLP (SCM_CDR (slot_name
)))
423 /* This slot admits (perhaps) to be initialized at creation time */
424 long n
= scm_ilength (SCM_CDR (slot_name
));
425 if (n
& 1) /* odd or -1 */
426 SCM_MISC_ERROR ("class contains bogus slot definition: ~S",
427 scm_list_1 (slot_name
));
428 tmp
= scm_i_get_keyword (k_init_keyword
,
433 slot_name
= SCM_CAR (slot_name
);
436 /* an initarg was provided for this slot */
437 if (!SCM_KEYWORDP (tmp
))
438 SCM_MISC_ERROR ("initarg must be a keyword. It was ~S",
440 slot_value
= scm_i_get_keyword (tmp
,
449 /* set slot to provided value */
450 set_slot_value (class, obj
, SCM_CAR (get_n_set
), slot_value
);
453 /* set slot to its :init-form if it exists */
454 tmp
= SCM_CADAR (get_n_set
);
455 if (tmp
!= SCM_BOOL_F
)
457 slot_value
= get_slot_value (class, obj
, SCM_CAR (get_n_set
));
458 if (SCM_GOOPS_UNBOUNDP (slot_value
))
460 SCM env
= SCM_EXTEND_ENV (SCM_EOL
, SCM_EOL
, SCM_ENV (tmp
));
461 set_slot_value (class,
464 scm_eval_body (SCM_CDR (SCM_CODE (tmp
)),
476 SCM_KEYWORD (k_class
, "class");
478 SCM_DEFINE (scm_sys_prep_layout_x
, "%prep-layout!", 1, 0, 0,
481 #define FUNC_NAME s_scm_sys_prep_layout_x
484 unsigned long int n
, i
;
487 SCM_VALIDATE_INSTANCE (1, class);
488 slots
= SCM_SLOT (class, scm_si_slots
);
489 nfields
= SCM_SLOT (class, scm_si_nfields
);
490 if (!SCM_INUMP (nfields
) || SCM_INUM (nfields
) < 0)
491 SCM_MISC_ERROR ("bad value in nfields slot: ~S",
492 scm_list_1 (nfields
));
493 n
= 2 * SCM_INUM (nfields
);
494 if (n
< sizeof (SCM_CLASS_CLASS_LAYOUT
) - 1
495 && SCM_SUBCLASSP (class, scm_class_class
))
496 SCM_MISC_ERROR ("class object doesn't have enough fields: ~S",
497 scm_list_1 (nfields
));
499 s
= n
> 0 ? scm_must_malloc (n
, FUNC_NAME
) : 0;
500 for (i
= 0; i
< n
; i
+= 2)
506 if (!SCM_CONSP (slots
))
507 SCM_MISC_ERROR ("too few slot definitions", SCM_EOL
);
508 len
= scm_ilength (SCM_CDAR (slots
));
509 type
= scm_i_get_keyword (k_class
, SCM_CDAR (slots
), len
, SCM_BOOL_F
,
511 if (SCM_FALSEP (type
))
518 if (!SCM_CLASSP (type
))
519 SCM_MISC_ERROR ("bad slot class", SCM_EOL
);
520 else if (SCM_SUBCLASSP (type
, scm_class_foreign_slot
))
522 if (SCM_SUBCLASSP (type
, scm_class_self
))
524 else if (SCM_SUBCLASSP (type
, scm_class_protected
))
529 if (SCM_SUBCLASSP (type
, scm_class_opaque
))
531 else if (SCM_SUBCLASSP (type
, scm_class_read_only
))
544 slots
= SCM_CDR (slots
);
546 SCM_SET_SLOT (class, scm_si_layout
, scm_mem2symbol (s
, n
));
549 return SCM_UNSPECIFIED
;
553 static void prep_hashsets (SCM
);
555 SCM_DEFINE (scm_sys_inherit_magic_x
, "%inherit-magic!", 2, 0, 0,
556 (SCM
class, SCM dsupers
),
558 #define FUNC_NAME s_scm_sys_inherit_magic_x
562 SCM_VALIDATE_INSTANCE (1, class);
563 while (!SCM_NULLP (ls
))
565 SCM_ASSERT (SCM_CONSP (ls
)
566 && SCM_INSTANCEP (SCM_CAR (ls
)),
570 flags
|= SCM_CLASS_FLAGS (SCM_CAR (ls
));
573 flags
&= SCM_CLASSF_INHERIT
;
574 if (flags
& SCM_CLASSF_ENTITY
)
575 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_entity
);
578 long n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
581 * We could avoid calling scm_must_malloc in the allocation code
582 * (in which case the following two lines are needed). Instead
583 * we make 0-slot instances non-light, so that the light case
584 * can be handled without special cases.
587 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_0
);
589 if (n
> 0 && !(flags
& SCM_CLASSF_METACLASS
))
591 /* NOTE: The following depends on scm_struct_i_size. */
592 flags
|= SCM_STRUCTF_LIGHT
+ n
* sizeof (SCM
); /* use light representation */
593 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
596 SCM_SET_CLASS_FLAGS (class, flags
);
598 prep_hashsets (class);
600 return SCM_UNSPECIFIED
;
605 prep_hashsets (SCM
class)
609 for (i
= 0; i
< 7; ++i
)
610 SCM_SET_HASHSET (class, i
, scm_c_uniform32 (goops_rstate
));
613 /******************************************************************************/
616 scm_basic_basic_make_class (SCM
class, SCM name
, SCM dsupers
, SCM dslots
)
618 SCM z
, cpl
, slots
, nfields
, g_n_s
;
620 /* Allocate one instance */
621 z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
623 /* Initialize its slots */
625 cpl
= compute_cpl (dsupers
, scm_list_1 (z
));
627 SCM_SET_SLOT (z
, scm_si_direct_supers
, dsupers
);
628 cpl
= compute_cpl (z
);
629 slots
= build_slots_list (maplist (dslots
), cpl
);
630 nfields
= SCM_MAKINUM (scm_ilength (slots
));
631 g_n_s
= compute_getters_n_setters (slots
);
633 SCM_SET_SLOT (z
, scm_si_name
, name
);
634 SCM_SET_SLOT (z
, scm_si_direct_slots
, dslots
);
635 SCM_SET_SLOT (z
, scm_si_direct_subclasses
, SCM_EOL
);
636 SCM_SET_SLOT (z
, scm_si_direct_methods
, SCM_EOL
);
637 SCM_SET_SLOT (z
, scm_si_cpl
, cpl
);
638 SCM_SET_SLOT (z
, scm_si_slots
, slots
);
639 SCM_SET_SLOT (z
, scm_si_nfields
, nfields
);
640 SCM_SET_SLOT (z
, scm_si_getters_n_setters
, g_n_s
);
641 SCM_SET_SLOT (z
, scm_si_redefined
, SCM_BOOL_F
);
642 SCM_SET_SLOT (z
, scm_si_environment
,
643 scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE
));
645 /* Add this class in the direct-subclasses slot of dsupers */
648 for (tmp
= dsupers
; !SCM_NULLP (tmp
); tmp
= SCM_CDR (tmp
))
649 SCM_SET_SLOT (SCM_CAR (tmp
), scm_si_direct_subclasses
,
650 scm_cons (z
, SCM_SLOT (SCM_CAR (tmp
),
651 scm_si_direct_subclasses
)));
654 /* Support for the underlying structs: */
655 SCM_SET_CLASS_FLAGS (z
, (class == scm_class_entity_class
656 ? (SCM_CLASSF_GOOPS_OR_VALID
657 | SCM_CLASSF_OPERATOR
659 : class == scm_class_operator_class
660 ? SCM_CLASSF_GOOPS_OR_VALID
| SCM_CLASSF_OPERATOR
661 : SCM_CLASSF_GOOPS_OR_VALID
));
666 scm_basic_make_class (SCM
class, SCM name
, SCM dsupers
, SCM dslots
)
668 SCM z
= scm_basic_basic_make_class (class, name
, dsupers
, dslots
);
669 scm_sys_inherit_magic_x (z
, dsupers
);
670 scm_sys_prep_layout_x (z
);
674 /******************************************************************************/
676 SCM_SYMBOL (sym_layout
, "layout");
677 SCM_SYMBOL (sym_vcell
, "vcell");
678 SCM_SYMBOL (sym_vtable
, "vtable");
679 SCM_SYMBOL (sym_print
, "print");
680 SCM_SYMBOL (sym_procedure
, "procedure");
681 SCM_SYMBOL (sym_setter
, "setter");
682 SCM_SYMBOL (sym_redefined
, "redefined");
683 SCM_SYMBOL (sym_h0
, "h0");
684 SCM_SYMBOL (sym_h1
, "h1");
685 SCM_SYMBOL (sym_h2
, "h2");
686 SCM_SYMBOL (sym_h3
, "h3");
687 SCM_SYMBOL (sym_h4
, "h4");
688 SCM_SYMBOL (sym_h5
, "h5");
689 SCM_SYMBOL (sym_h6
, "h6");
690 SCM_SYMBOL (sym_h7
, "h7");
691 SCM_SYMBOL (sym_name
, "name");
692 SCM_SYMBOL (sym_direct_supers
, "direct-supers");
693 SCM_SYMBOL (sym_direct_slots
, "direct-slots");
694 SCM_SYMBOL (sym_direct_subclasses
, "direct-subclasses");
695 SCM_SYMBOL (sym_direct_methods
, "direct-methods");
696 SCM_SYMBOL (sym_cpl
, "cpl");
697 SCM_SYMBOL (sym_default_slot_definition_class
, "default-slot-definition-class");
698 SCM_SYMBOL (sym_slots
, "slots");
699 SCM_SYMBOL (sym_getters_n_setters
, "getters-n-setters");
700 SCM_SYMBOL (sym_keyword_access
, "keyword-access");
701 SCM_SYMBOL (sym_nfields
, "nfields");
702 SCM_SYMBOL (sym_environment
, "environment");
706 build_class_class_slots ()
709 scm_list_3 (sym_layout
, k_class
, scm_class_protected_read_only
),
710 scm_list_3 (sym_vtable
, k_class
, scm_class_self
),
711 scm_list_1 (sym_print
),
712 scm_list_3 (sym_procedure
, k_class
, scm_class_protected_opaque
),
713 scm_list_3 (sym_setter
, k_class
, scm_class_protected_opaque
),
714 scm_list_1 (sym_redefined
),
715 scm_list_3 (sym_h0
, k_class
, scm_class_int
),
716 scm_list_3 (sym_h1
, k_class
, scm_class_int
),
717 scm_list_3 (sym_h2
, k_class
, scm_class_int
),
718 scm_list_3 (sym_h3
, k_class
, scm_class_int
),
719 scm_list_3 (sym_h4
, k_class
, scm_class_int
),
720 scm_list_3 (sym_h5
, k_class
, scm_class_int
),
721 scm_list_3 (sym_h6
, k_class
, scm_class_int
),
722 scm_list_3 (sym_h7
, k_class
, scm_class_int
),
723 scm_list_1 (sym_name
),
724 scm_list_1 (sym_direct_supers
),
725 scm_list_1 (sym_direct_slots
),
726 scm_list_1 (sym_direct_subclasses
),
727 scm_list_1 (sym_direct_methods
),
728 scm_list_1 (sym_cpl
),
729 scm_list_1 (sym_default_slot_definition_class
),
730 scm_list_1 (sym_slots
),
731 scm_list_1 (sym_getters_n_setters
),
732 scm_list_1 (sym_keyword_access
),
733 scm_list_1 (sym_nfields
),
734 scm_list_1 (sym_environment
),
739 create_basic_classes (void)
741 /* SCM slots_of_class = build_class_class_slots (); */
743 /**** <scm_class_class> ****/
744 SCM cs
= scm_makfrom0str (SCM_CLASS_CLASS_LAYOUT
745 + 2 * scm_vtable_offset_user
);
746 SCM name
= scm_str2symbol ("<class>");
747 scm_class_class
= scm_permanent_object (scm_make_vtable_vtable (cs
,
750 SCM_SET_CLASS_FLAGS (scm_class_class
, (SCM_CLASSF_GOOPS_OR_VALID
751 | SCM_CLASSF_METACLASS
));
753 SCM_SET_SLOT (scm_class_class
, scm_si_name
, name
);
754 SCM_SET_SLOT (scm_class_class
, scm_si_direct_supers
, SCM_EOL
); /* will be changed */
755 /* SCM_SET_SLOT (scm_class_class, scm_si_direct_slots, slots_of_class); */
756 SCM_SET_SLOT (scm_class_class
, scm_si_direct_subclasses
, SCM_EOL
);
757 SCM_SET_SLOT (scm_class_class
, scm_si_direct_methods
, SCM_EOL
);
758 SCM_SET_SLOT (scm_class_class
, scm_si_cpl
, SCM_EOL
); /* will be changed */
759 /* SCM_SET_SLOT (scm_class_class, scm_si_slots, slots_of_class); */
760 SCM_SET_SLOT (scm_class_class
, scm_si_nfields
, SCM_MAKINUM (SCM_N_CLASS_SLOTS
));
761 /* SCM_SET_SLOT (scm_class_class, scm_si_getters_n_setters,
762 compute_getters_n_setters (slots_of_class)); */
763 SCM_SET_SLOT (scm_class_class
, scm_si_redefined
, SCM_BOOL_F
);
764 SCM_SET_SLOT (scm_class_class
, scm_si_environment
,
765 scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE
));
767 prep_hashsets (scm_class_class
);
769 DEFVAR(name
, scm_class_class
);
771 /**** <scm_class_top> ****/
772 name
= scm_str2symbol ("<top>");
773 scm_class_top
= scm_permanent_object (scm_basic_make_class (scm_class_class
,
778 DEFVAR(name
, scm_class_top
);
780 /**** <scm_class_object> ****/
781 name
= scm_str2symbol ("<object>");
782 scm_class_object
= scm_permanent_object (scm_basic_make_class (scm_class_class
,
784 scm_list_1 (scm_class_top
),
787 DEFVAR (name
, scm_class_object
);
789 /* <top> <object> and <class> were partially initialized. Correct them here */
790 SCM_SET_SLOT (scm_class_object
, scm_si_direct_subclasses
, scm_list_1 (scm_class_class
));
792 SCM_SET_SLOT (scm_class_class
, scm_si_direct_supers
, scm_list_1 (scm_class_object
));
793 SCM_SET_SLOT (scm_class_class
, scm_si_cpl
, scm_list_3 (scm_class_class
, scm_class_object
, scm_class_top
));
796 /******************************************************************************/
798 SCM_DEFINE (scm_instance_p
, "instance?", 1, 0, 0,
800 "Return @code{#t} if @var{obj} is an instance.")
801 #define FUNC_NAME s_scm_instance_p
803 return SCM_BOOL (SCM_INSTANCEP (obj
));
808 /******************************************************************************
810 * Meta object accessors
812 ******************************************************************************/
813 SCM_DEFINE (scm_class_name
, "class-name", 1, 0, 0,
815 "Return the class name of @var{obj}.")
816 #define FUNC_NAME s_scm_class_name
818 SCM_VALIDATE_CLASS (1, obj
);
819 return scm_slot_ref (obj
, sym_name
);
823 SCM_DEFINE (scm_class_direct_supers
, "class-direct-supers", 1, 0, 0,
825 "Return the direct superclasses of the class @var{obj}.")
826 #define FUNC_NAME s_scm_class_direct_supers
828 SCM_VALIDATE_CLASS (1, obj
);
829 return scm_slot_ref (obj
, sym_direct_supers
);
833 SCM_DEFINE (scm_class_direct_slots
, "class-direct-slots", 1, 0, 0,
835 "Return the direct slots of the class @var{obj}.")
836 #define FUNC_NAME s_scm_class_direct_slots
838 SCM_VALIDATE_CLASS (1, obj
);
839 return scm_slot_ref (obj
, sym_direct_slots
);
843 SCM_DEFINE (scm_class_direct_subclasses
, "class-direct-subclasses", 1, 0, 0,
845 "Return the direct subclasses of the class @var{obj}.")
846 #define FUNC_NAME s_scm_class_direct_subclasses
848 SCM_VALIDATE_CLASS (1, obj
);
849 return scm_slot_ref(obj
, sym_direct_subclasses
);
853 SCM_DEFINE (scm_class_direct_methods
, "class-direct-methods", 1, 0, 0,
855 "Return the direct methods of the class @var{obj}")
856 #define FUNC_NAME s_scm_class_direct_methods
858 SCM_VALIDATE_CLASS (1, obj
);
859 return scm_slot_ref (obj
, sym_direct_methods
);
863 SCM_DEFINE (scm_class_precedence_list
, "class-precedence-list", 1, 0, 0,
865 "Return the class precedence list of the class @var{obj}.")
866 #define FUNC_NAME s_scm_class_precedence_list
868 SCM_VALIDATE_CLASS (1, obj
);
869 return scm_slot_ref (obj
, sym_cpl
);
873 SCM_DEFINE (scm_class_slots
, "class-slots", 1, 0, 0,
875 "Return the slot list of the class @var{obj}.")
876 #define FUNC_NAME s_scm_class_slots
878 SCM_VALIDATE_CLASS (1, obj
);
879 return scm_slot_ref (obj
, sym_slots
);
883 SCM_DEFINE (scm_class_environment
, "class-environment", 1, 0, 0,
885 "Return the environment of the class @var{obj}.")
886 #define FUNC_NAME s_scm_class_environment
888 SCM_VALIDATE_CLASS (1, obj
);
889 return scm_slot_ref(obj
, sym_environment
);
894 SCM_DEFINE (scm_generic_function_name
, "generic-function-name", 1, 0, 0,
896 "Return the name of the generic function @var{obj}.")
897 #define FUNC_NAME s_scm_generic_function_name
899 SCM_VALIDATE_GENERIC (1, obj
);
900 return scm_procedure_property (obj
, scm_sym_name
);
904 SCM_DEFINE (scm_generic_function_methods
, "generic-function-methods", 1, 0, 0,
906 "Return the methods of the generic function @var{obj}.")
907 #define FUNC_NAME s_scm_generic_function_methods
909 SCM_VALIDATE_GENERIC (1, obj
);
910 return scm_slot_ref (obj
, scm_str2symbol ("methods"));
915 SCM_DEFINE (scm_method_generic_function
, "method-generic-function", 1, 0, 0,
917 "Return the generic function fot the method @var{obj}.")
918 #define FUNC_NAME s_scm_method_generic_function
920 SCM_VALIDATE_METHOD (1, obj
);
921 return scm_slot_ref (obj
, scm_str2symbol ("generic-function"));
925 SCM_DEFINE (scm_method_specializers
, "method-specializers", 1, 0, 0,
927 "Return specializers of the method @var{obj}.")
928 #define FUNC_NAME s_scm_method_specializers
930 SCM_VALIDATE_METHOD (1, obj
);
931 return scm_slot_ref (obj
, scm_str2symbol ("specializers"));
935 SCM_DEFINE (scm_method_procedure
, "method-procedure", 1, 0, 0,
937 "Return the procedure of the method @var{obj}.")
938 #define FUNC_NAME s_scm_method_procedure
940 SCM_VALIDATE_METHOD (1, obj
);
941 return scm_slot_ref (obj
, sym_procedure
);
945 SCM_DEFINE (scm_accessor_method_slot_definition
, "accessor-method-slot-definition", 1, 0, 0,
947 "Return the slot definition of the accessor @var{obj}.")
948 #define FUNC_NAME s_scm_accessor_method_slot_definition
950 SCM_VALIDATE_ACCESSOR (1, obj
);
951 return scm_slot_ref (obj
, scm_str2symbol ("slot-definition"));
955 SCM_DEFINE (scm_sys_tag_body
, "%tag-body", 1, 0, 0,
957 "Internal GOOPS magic---don't use this function!")
958 #define FUNC_NAME s_scm_sys_tag_body
960 return scm_cons (SCM_IM_LAMBDA
, body
);
964 /******************************************************************************
966 * S l o t a c c e s s
968 ******************************************************************************/
970 SCM_DEFINE (scm_make_unbound
, "make-unbound", 0, 0, 0,
972 "Return the unbound value.")
973 #define FUNC_NAME s_scm_make_unbound
975 return SCM_GOOPS_UNBOUND
;
979 SCM_DEFINE (scm_unbound_p
, "unbound?", 1, 0, 0,
981 "Return @code{#t} if @var{obj} is unbound.")
982 #define FUNC_NAME s_scm_unbound_p
984 return SCM_GOOPS_UNBOUNDP (obj
) ? SCM_BOOL_T
: SCM_BOOL_F
;
988 SCM_DEFINE (scm_assert_bound
, "assert-bound", 2, 0, 0,
989 (SCM value
, SCM obj
),
990 "Return @var{value} if it is bound, and invoke the\n"
991 "@var{slot-unbound} method of @var{obj} if it is not.")
992 #define FUNC_NAME s_scm_assert_bound
994 if (SCM_GOOPS_UNBOUNDP (value
))
995 return CALL_GF1 ("slot-unbound", obj
);
1000 SCM_DEFINE (scm_at_assert_bound_ref
, "@assert-bound-ref", 2, 0, 0,
1001 (SCM obj
, SCM index
),
1002 "Like @code{assert-bound}, but use @var{index} for accessing\n"
1003 "the value from @var{obj}.")
1004 #define FUNC_NAME s_scm_at_assert_bound_ref
1006 SCM value
= SCM_SLOT (obj
, SCM_INUM (index
));
1007 if (SCM_GOOPS_UNBOUNDP (value
))
1008 return CALL_GF1 ("slot-unbound", obj
);
1013 SCM_DEFINE (scm_sys_fast_slot_ref
, "%fast-slot-ref", 2, 0, 0,
1014 (SCM obj
, SCM index
),
1015 "Return the slot value with index @var{index} from @var{obj}.")
1016 #define FUNC_NAME s_scm_sys_fast_slot_ref
1018 unsigned long int i
;
1020 SCM_VALIDATE_INSTANCE (1, obj
);
1021 SCM_VALIDATE_INUM (2, index
);
1022 SCM_ASSERT_RANGE (2, index
, SCM_INUM (index
) >= 0);
1023 i
= SCM_INUM (index
);
1024 SCM_ASSERT_RANGE (2, index
, i
< SCM_NUMBER_OF_SLOTS (obj
));
1026 return scm_at_assert_bound_ref (obj
, index
);
1030 SCM_DEFINE (scm_sys_fast_slot_set_x
, "%fast-slot-set!", 3, 0, 0,
1031 (SCM obj
, SCM index
, SCM value
),
1032 "Set the slot with index @var{index} in @var{obj} to\n"
1034 #define FUNC_NAME s_scm_sys_fast_slot_set_x
1036 unsigned long int i
;
1038 SCM_VALIDATE_INSTANCE (1, obj
);
1039 SCM_VALIDATE_INUM (2, index
);
1040 SCM_ASSERT_RANGE (2, index
, SCM_INUM (index
) >= 0);
1041 i
= SCM_INUM (index
);
1042 SCM_ASSERT_RANGE (2, index
, i
< SCM_NUMBER_OF_SLOTS (obj
));
1044 SCM_SET_SLOT (obj
, i
, value
);
1046 return SCM_UNSPECIFIED
;
1053 /* In the future, this function will return the effective slot
1054 * definition associated with SLOT_NAME. Now it just returns some of
1055 * the information which will be stored in the effective slot
1060 slot_definition_using_name (SCM
class, SCM slot_name
)
1062 register SCM slots
= SCM_SLOT (class, scm_si_getters_n_setters
);
1063 for (; !SCM_NULLP (slots
); slots
= SCM_CDR (slots
))
1064 if (SCM_CAAR (slots
) == slot_name
)
1065 return SCM_CAR (slots
);
1070 get_slot_value (SCM
class SCM_UNUSED
, SCM obj
, SCM slotdef
)
1072 SCM access
= SCM_CDDR (slotdef
);
1074 * - access is an integer (the offset of this slot in the slots vector)
1075 * - otherwise (car access) is the getter function to apply
1077 if (SCM_INUMP (access
))
1078 return SCM_SLOT (obj
, SCM_INUM (access
));
1081 /* We must evaluate (apply (car access) (list obj))
1082 * where (car access) is known to be a closure of arity 1 */
1083 register SCM code
, env
;
1085 code
= SCM_CAR (access
);
1086 if (!SCM_CLOSUREP (code
))
1087 return SCM_SUBRF (code
) (obj
);
1088 env
= SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (code
),
1091 /* Evaluate the closure body */
1092 return scm_eval_body (SCM_CDR (SCM_CODE (code
)), env
);
1097 get_slot_value_using_name (SCM
class, SCM obj
, SCM slot_name
)
1099 SCM slotdef
= slot_definition_using_name (class, slot_name
);
1100 if (!SCM_FALSEP (slotdef
))
1101 return get_slot_value (class, obj
, slotdef
);
1103 return CALL_GF3 ("slot-missing", class, obj
, slot_name
);
1107 set_slot_value (SCM
class SCM_UNUSED
, SCM obj
, SCM slotdef
, SCM value
)
1109 SCM access
= SCM_CDDR (slotdef
);
1111 * - access is an integer (the offset of this slot in the slots vector)
1112 * - otherwise (cadr access) is the setter function to apply
1114 if (SCM_INUMP (access
))
1115 SCM_SET_SLOT (obj
, SCM_INUM (access
), value
);
1118 /* We must evaluate (apply (cadr l) (list obj value))
1119 * where (cadr l) is known to be a closure of arity 2 */
1120 register SCM code
, env
;
1122 code
= SCM_CADR (access
);
1123 if (!SCM_CLOSUREP (code
))
1124 SCM_SUBRF (code
) (obj
, value
);
1127 env
= SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (code
),
1128 scm_list_2 (obj
, value
),
1130 /* Evaluate the closure body */
1131 scm_eval_body (SCM_CDR (SCM_CODE (code
)), env
);
1134 return SCM_UNSPECIFIED
;
1138 set_slot_value_using_name (SCM
class, SCM obj
, SCM slot_name
, SCM value
)
1140 SCM slotdef
= slot_definition_using_name (class, slot_name
);
1141 if (!SCM_FALSEP (slotdef
))
1142 return set_slot_value (class, obj
, slotdef
, value
);
1144 return CALL_GF4 ("slot-missing", class, obj
, slot_name
, value
);
1148 test_slot_existence (SCM
class SCM_UNUSED
, SCM obj
, SCM slot_name
)
1152 for (l
= SCM_ACCESSORS_OF (obj
); !SCM_NULLP (l
); l
= SCM_CDR (l
))
1153 if (SCM_EQ_P (SCM_CAAR (l
), slot_name
))
1159 /* ======================================== */
1161 SCM_DEFINE (scm_slot_ref_using_class
, "slot-ref-using-class", 3, 0, 0,
1162 (SCM
class, SCM obj
, SCM slot_name
),
1164 #define FUNC_NAME s_scm_slot_ref_using_class
1168 SCM_VALIDATE_CLASS (1, class);
1169 SCM_VALIDATE_INSTANCE (2, obj
);
1170 SCM_VALIDATE_SYMBOL (3, slot_name
);
1172 res
= get_slot_value_using_name (class, obj
, slot_name
);
1173 if (SCM_GOOPS_UNBOUNDP (res
))
1174 return CALL_GF3 ("slot-unbound", class, obj
, slot_name
);
1180 SCM_DEFINE (scm_slot_set_using_class_x
, "slot-set-using-class!", 4, 0, 0,
1181 (SCM
class, SCM obj
, SCM slot_name
, SCM value
),
1183 #define FUNC_NAME s_scm_slot_set_using_class_x
1185 SCM_VALIDATE_CLASS (1, class);
1186 SCM_VALIDATE_INSTANCE (2, obj
);
1187 SCM_VALIDATE_SYMBOL (3, slot_name
);
1189 return set_slot_value_using_name (class, obj
, slot_name
, value
);
1194 SCM_DEFINE (scm_slot_bound_using_class_p
, "slot-bound-using-class?", 3, 0, 0,
1195 (SCM
class, SCM obj
, SCM slot_name
),
1197 #define FUNC_NAME s_scm_slot_bound_using_class_p
1199 SCM_VALIDATE_CLASS (1, class);
1200 SCM_VALIDATE_INSTANCE (2, obj
);
1201 SCM_VALIDATE_SYMBOL (3, slot_name
);
1203 return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class, obj
, slot_name
))
1209 SCM_DEFINE (scm_slot_exists_using_class_p
, "slot-exists-using-class?", 3, 0, 0,
1210 (SCM
class, SCM obj
, SCM slot_name
),
1212 #define FUNC_NAME s_scm_slot_exists_using_class_p
1214 SCM_VALIDATE_CLASS (1, class);
1215 SCM_VALIDATE_INSTANCE (2, obj
);
1216 SCM_VALIDATE_SYMBOL (3, slot_name
);
1217 return test_slot_existence (class, obj
, slot_name
);
1222 /* ======================================== */
1224 SCM_DEFINE (scm_slot_ref
, "slot-ref", 2, 0, 0,
1225 (SCM obj
, SCM slot_name
),
1226 "Return the value from @var{obj}'s slot with the name\n"
1228 #define FUNC_NAME s_scm_slot_ref
1232 SCM_VALIDATE_INSTANCE (1, obj
);
1233 TEST_CHANGE_CLASS (obj
, class);
1235 res
= get_slot_value_using_name (class, obj
, slot_name
);
1236 if (SCM_GOOPS_UNBOUNDP (res
))
1237 return CALL_GF3 ("slot-unbound", class, obj
, slot_name
);
1242 SCM_DEFINE (scm_slot_set_x
, "slot-set!", 3, 0, 0,
1243 (SCM obj
, SCM slot_name
, SCM value
),
1244 "Set the slot named @var{slot_name} of @var{obj} to @var{value}.")
1245 #define FUNC_NAME s_scm_slot_set_x
1249 SCM_VALIDATE_INSTANCE (1, obj
);
1250 TEST_CHANGE_CLASS(obj
, class);
1252 return set_slot_value_using_name (class, obj
, slot_name
, value
);
1256 const char *scm_s_slot_set_x
= s_scm_slot_set_x
;
1258 SCM_DEFINE (scm_slot_bound_p
, "slot-bound?", 2, 0, 0,
1259 (SCM obj
, SCM slot_name
),
1260 "Return @code{#t} if the slot named @var{slot_name} of @var{obj}\n"
1262 #define FUNC_NAME s_scm_slot_bound_p
1266 SCM_VALIDATE_INSTANCE (1, obj
);
1267 TEST_CHANGE_CLASS(obj
, class);
1269 return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class,
1277 SCM_DEFINE (scm_slots_exists_p
, "slot-exists?", 2, 0, 0,
1278 (SCM obj
, SCM slot_name
),
1279 "Return @code{#t} if @var{obj} has a slot named @var{slot_name}.")
1280 #define FUNC_NAME s_scm_slots_exists_p
1284 SCM_VALIDATE_INSTANCE (1, obj
);
1285 SCM_VALIDATE_SYMBOL (2, slot_name
);
1286 TEST_CHANGE_CLASS (obj
, class);
1288 return test_slot_existence (class, obj
, slot_name
);
1293 /******************************************************************************
1295 * %allocate-instance (the low level instance allocation primitive)
1297 ******************************************************************************/
1299 static void clear_method_cache (SCM
);
1302 wrap_init (SCM
class, SCM
*m
, long n
)
1307 /* Set all slots to unbound */
1308 for (i
= 0; i
< n
; i
++)
1309 m
[i
] = SCM_GOOPS_UNBOUND
;
1312 SCM_SET_STRUCT_GC_CHAIN (z
, 0);
1313 SCM_SET_CELL_WORD_1 (z
, m
);
1314 SCM_SET_CELL_WORD_0 (z
, (scm_t_bits
) SCM_STRUCT_DATA (class)
1320 SCM_DEFINE (scm_sys_allocate_instance
, "%allocate-instance", 2, 0, 0,
1321 (SCM
class, SCM initargs
),
1322 "Create a new instance of class @var{class} and initialize it\n"
1323 "from the arguments @var{initargs}.")
1324 #define FUNC_NAME s_scm_sys_allocate_instance
1329 SCM_VALIDATE_CLASS (1, class);
1331 /* Most instances */
1332 if (SCM_CLASS_FLAGS (class) & SCM_STRUCTF_LIGHT
)
1334 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1335 m
= (SCM
*) scm_must_malloc (n
* sizeof (SCM
), "instance");
1336 return wrap_init (class, m
, n
);
1339 /* Foreign objects */
1340 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_FOREIGN
)
1341 return scm_make_foreign_object (class, initargs
);
1343 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1346 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_ENTITY
)
1348 m
= (SCM
*) scm_alloc_struct (n
,
1349 scm_struct_entity_n_extra_words
,
1351 m
[scm_struct_i_setter
] = SCM_BOOL_F
;
1352 m
[scm_struct_i_procedure
] = SCM_BOOL_F
;
1353 /* Generic functions */
1354 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_PURE_GENERIC
)
1356 SCM gf
= wrap_init (class, m
, n
);
1357 clear_method_cache (gf
);
1361 return wrap_init (class, m
, n
);
1365 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_METACLASS
)
1369 /* allocate class object */
1370 SCM z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
1372 SCM_SET_SLOT (z
, scm_si_print
, SCM_GOOPS_UNBOUND
);
1373 for (i
= scm_si_goops_fields
; i
< n
; i
++)
1374 SCM_SET_SLOT (z
, i
, SCM_GOOPS_UNBOUND
);
1376 if (SCM_SUBCLASSP (class, scm_class_entity_class
))
1377 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
| SCM_CLASSF_ENTITY
);
1378 else if (SCM_SUBCLASSP (class, scm_class_operator_class
))
1379 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
);
1384 /* Non-light instances */
1386 m
= (SCM
*) scm_alloc_struct (n
,
1387 scm_struct_n_extra_words
,
1389 return wrap_init (class, m
, n
);
1394 SCM_DEFINE (scm_sys_set_object_setter_x
, "%set-object-setter!", 2, 0, 0,
1395 (SCM obj
, SCM setter
),
1397 #define FUNC_NAME s_scm_sys_set_object_setter_x
1399 SCM_ASSERT (SCM_STRUCTP (obj
)
1400 && ((SCM_CLASS_FLAGS (obj
) & SCM_CLASSF_OPERATOR
)
1401 || SCM_I_ENTITYP (obj
)),
1405 if (SCM_I_ENTITYP (obj
))
1406 SCM_SET_ENTITY_SETTER (obj
, setter
);
1408 SCM_OPERATOR_CLASS (obj
)->setter
= setter
;
1409 return SCM_UNSPECIFIED
;
1413 /******************************************************************************
1415 * %modify-instance (used by change-class to modify in place)
1417 ******************************************************************************/
1419 SCM_DEFINE (scm_sys_modify_instance
, "%modify-instance", 2, 0, 0,
1422 #define FUNC_NAME s_scm_sys_modify_instance
1424 SCM_VALIDATE_INSTANCE (1, old
);
1425 SCM_VALIDATE_INSTANCE (2, new);
1427 /* Exchange the data contained in old and new. We exchange rather than
1428 * scratch the old value with new to be correct with GC.
1429 * See "Class redefinition protocol above".
1433 SCM car
= SCM_CAR (old
);
1434 SCM cdr
= SCM_CDR (old
);
1435 SCM_SETCAR (old
, SCM_CAR (new));
1436 SCM_SETCDR (old
, SCM_CDR (new));
1437 SCM_SETCAR (new, car
);
1438 SCM_SETCDR (new, cdr
);
1441 return SCM_UNSPECIFIED
;
1445 SCM_DEFINE (scm_sys_modify_class
, "%modify-class", 2, 0, 0,
1448 #define FUNC_NAME s_scm_sys_modify_class
1450 SCM_VALIDATE_CLASS (1, old
);
1451 SCM_VALIDATE_CLASS (2, new);
1455 SCM car
= SCM_CAR (old
);
1456 SCM cdr
= SCM_CDR (old
);
1457 SCM_SETCAR (old
, SCM_CAR (new));
1458 SCM_SETCDR (old
, SCM_CDR (new));
1459 SCM_STRUCT_DATA (old
)[scm_vtable_index_vtable
] = SCM_UNPACK (old
);
1460 SCM_SETCAR (new, car
);
1461 SCM_SETCDR (new, cdr
);
1462 SCM_STRUCT_DATA (new)[scm_vtable_index_vtable
] = SCM_UNPACK (new);
1465 return SCM_UNSPECIFIED
;
1469 SCM_DEFINE (scm_sys_invalidate_class
, "%invalidate-class", 1, 0, 0,
1472 #define FUNC_NAME s_scm_sys_invalidate_class
1474 SCM_VALIDATE_CLASS (1, class);
1475 SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID
);
1476 return SCM_UNSPECIFIED
;
1480 /* When instances change class, they finally get a new body, but
1481 * before that, they go through purgatory in hell. Odd as it may
1482 * seem, this data structure saves us from eternal suffering in
1483 * infinite recursions.
1486 static scm_t_bits
**hell
;
1487 static long n_hell
= 1; /* one place for the evil one himself */
1488 static long hell_size
= 4;
1490 static scm_t_mutex hell_mutex
;
1497 for (i
= 1; i
< n_hell
; ++i
)
1498 if (SCM_STRUCT_DATA (o
) == hell
[i
])
1504 go_to_hell (void *o
)
1506 SCM obj
= SCM_PACK ((scm_t_bits
) o
);
1508 scm_mutex_lock (&hell_mutex
);
1510 if (n_hell
== hell_size
)
1512 long new_size
= 2 * hell_size
;
1513 hell
= scm_must_realloc (hell
, hell_size
, new_size
, "hell");
1514 hell_size
= new_size
;
1516 hell
[n_hell
++] = SCM_STRUCT_DATA (obj
);
1518 scm_mutex_unlock (&hell_mutex
);
1523 go_to_heaven (void *o
)
1526 scm_mutex_lock (&hell_mutex
);
1528 hell
[burnin (SCM_PACK ((scm_t_bits
) o
))] = hell
[--n_hell
];
1530 scm_mutex_unlock (&hell_mutex
);
1535 SCM_SYMBOL (scm_sym_change_class
, "change-class");
1538 purgatory (void *args
)
1540 return scm_apply_0 (GETVAR (scm_sym_change_class
),
1541 SCM_PACK ((scm_t_bits
) args
));
1545 scm_change_object_class (SCM obj
, SCM old_class SCM_UNUSED
, SCM new_class
)
1548 scm_internal_dynamic_wind (go_to_hell
, purgatory
, go_to_heaven
,
1549 (void *) SCM_UNPACK (scm_list_2 (obj
, new_class
)),
1550 (void *) SCM_UNPACK (obj
));
1553 /******************************************************************************
1559 * GGG E N E R I C F U N C T I O N S
1561 * This implementation provides
1562 * - generic functions (with class specializers)
1565 * - a hard-coded MOP for standard gf, which can be overloaded for non-std gf
1567 ******************************************************************************/
1569 SCM_KEYWORD (k_name
, "name");
1571 SCM_SYMBOL (sym_no_method
, "no-method");
1573 static SCM list_of_no_method
;
1575 SCM_SYMBOL (scm_sym_args
, "args");
1578 scm_make_method_cache (SCM gf
)
1580 return scm_list_5 (SCM_IM_DISPATCH
,
1583 scm_c_make_vector (SCM_INITIAL_MCACHE_SIZE
,
1589 clear_method_cache (SCM gf
)
1591 SCM cache
= scm_make_method_cache (gf
);
1592 SCM_SET_ENTITY_PROCEDURE (gf
, cache
);
1593 SCM_SET_SLOT (gf
, scm_si_used_by
, SCM_BOOL_F
);
1596 SCM_DEFINE (scm_sys_invalidate_method_cache_x
, "%invalidate-method-cache!", 1, 0, 0,
1599 #define FUNC_NAME s_scm_sys_invalidate_method_cache_x
1602 SCM_ASSERT (SCM_PUREGENERICP (gf
), gf
, SCM_ARG1
, FUNC_NAME
);
1603 used_by
= SCM_SLOT (gf
, scm_si_used_by
);
1604 if (!SCM_FALSEP (used_by
))
1606 SCM methods
= SCM_SLOT (gf
, scm_si_methods
);
1607 for (; SCM_CONSP (used_by
); used_by
= SCM_CDR (used_by
))
1608 scm_sys_invalidate_method_cache_x (SCM_CAR (used_by
));
1609 clear_method_cache (gf
);
1610 for (; SCM_CONSP (methods
); methods
= SCM_CDR (methods
))
1611 SCM_SET_SLOT (SCM_CAR (methods
), scm_si_code_table
, SCM_EOL
);
1614 SCM n
= SCM_SLOT (gf
, scm_si_n_specialized
);
1615 /* The sign of n is a flag indicating rest args. */
1616 SCM_SET_MCACHE_N_SPECIALIZED (SCM_ENTITY_PROCEDURE (gf
), n
);
1618 return SCM_UNSPECIFIED
;
1622 SCM_DEFINE (scm_generic_capability_p
, "generic-capability?", 1, 0, 0,
1625 #define FUNC_NAME s_scm_generic_capability_p
1627 SCM_ASSERT (!SCM_FALSEP (scm_procedure_p (proc
)),
1628 proc
, SCM_ARG1
, FUNC_NAME
);
1629 return (scm_subr_p (proc
) && SCM_SUBR_GENERIC (proc
)
1635 SCM_DEFINE (scm_enable_primitive_generic_x
, "enable-primitive-generic!", 0, 0, 1,
1638 #define FUNC_NAME s_scm_enable_primitive_generic_x
1640 SCM_VALIDATE_REST_ARGUMENT (subrs
);
1641 while (!SCM_NULLP (subrs
))
1643 SCM subr
= SCM_CAR (subrs
);
1644 SCM_ASSERT (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
),
1645 subr
, SCM_ARGn
, FUNC_NAME
);
1646 *SCM_SUBR_GENERIC (subr
)
1647 = scm_make (scm_list_3 (scm_class_generic
,
1650 subrs
= SCM_CDR (subrs
);
1652 return SCM_UNSPECIFIED
;
1656 SCM_DEFINE (scm_primitive_generic_generic
, "primitive-generic-generic", 1, 0, 0,
1659 #define FUNC_NAME s_scm_primitive_generic_generic
1661 if (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
))
1663 SCM gf
= *SCM_SUBR_GENERIC (subr
);
1667 SCM_WRONG_TYPE_ARG (SCM_ARG1
, subr
);
1671 /******************************************************************************
1673 * Protocol for calling a generic fumction
1674 * This protocol is roughly equivalent to (parameter are a little bit different
1675 * for efficiency reasons):
1677 * + apply-generic (gf args)
1678 * + compute-applicable-methods (gf args ...)
1679 * + sort-applicable-methods (methods args)
1680 * + apply-methods (gf methods args)
1682 * apply-methods calls make-next-method to build the "continuation" of a a
1683 * method. Applying a next-method will call apply-next-method which in
1684 * turn will call apply again to call effectively the following method.
1686 ******************************************************************************/
1689 applicablep (SCM actual
, SCM formal
)
1691 /* We already know that the cpl is well formed. */
1692 return !SCM_FALSEP (scm_c_memq (formal
, SCM_SLOT (actual
, scm_si_cpl
)));
1696 more_specificp (SCM m1
, SCM m2
, SCM
*targs
)
1698 register SCM s1
, s2
;
1702 * m1 and m2 can have != length (i.e. one can be one element longer than the
1703 * other when we have a dotted parameter list). For instance, with the call
1706 * (define-method M (a . l) ....)
1707 * (define-method M (a) ....)
1709 * we consider that the second method is more specific.
1711 * BTW, targs is an array of types. We don't need it's size since
1712 * we already know that m1 and m2 are applicable (no risk to go past
1713 * the end of this array).
1716 for (i
=0,s1
=SPEC_OF(m1
),s2
=SPEC_OF(m2
); ; i
++,s1
=SCM_CDR(s1
),s2
=SCM_CDR(s2
)) {
1717 if (SCM_NULLP(s1
)) return 1;
1718 if (SCM_NULLP(s2
)) return 0;
1719 if (SCM_CAR(s1
) != SCM_CAR(s2
)) {
1720 register SCM l
, cs1
= SCM_CAR(s1
), cs2
= SCM_CAR(s2
);
1722 for (l
= SCM_SLOT (targs
[i
], scm_si_cpl
); ; l
= SCM_CDR(l
)) {
1723 if (cs1
== SCM_CAR(l
))
1725 if (cs2
== SCM_CAR(l
))
1728 return 0;/* should not occur! */
1731 return 0; /* should not occur! */
1734 #define BUFFSIZE 32 /* big enough for most uses */
1737 scm_i_vector2list (SCM l
, long len
)
1740 SCM z
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1742 for (j
= 0; j
< len
; j
++, l
= SCM_CDR (l
)) {
1743 SCM_VELTS (z
)[j
] = SCM_CAR (l
);
1749 sort_applicable_methods (SCM method_list
, long size
, SCM
*targs
)
1752 SCM
*v
, vector
= SCM_EOL
;
1753 SCM buffer
[BUFFSIZE
];
1754 SCM save
= method_list
;
1756 /* For reasonably sized method_lists we can try to avoid all the
1757 * consing and reorder the list in place...
1758 * This idea is due to David McClain <Dave_McClain@msn.com>
1760 if (size
<= BUFFSIZE
)
1762 for (i
= 0; i
< size
; i
++)
1764 buffer
[i
] = SCM_CAR (method_list
);
1765 method_list
= SCM_CDR (method_list
);
1771 /* Too many elements in method_list to keep everything locally */
1772 vector
= scm_i_vector2list (save
, size
);
1773 v
= SCM_VELTS (vector
);
1776 /* Use a simple shell sort since it is generally faster than qsort on
1777 * small vectors (which is probably mostly the case when we have to
1778 * sort a list of applicable methods).
1780 for (incr
= size
/ 2; incr
; incr
/= 2)
1782 for (i
= incr
; i
< size
; i
++)
1784 for (j
= i
- incr
; j
>= 0; j
-= incr
)
1786 if (more_specificp (v
[j
], v
[j
+incr
], targs
))
1790 SCM tmp
= v
[j
+ incr
];
1798 if (size
<= BUFFSIZE
)
1800 /* We did it in locally, so restore the original list (reordered) in-place */
1801 for (i
= 0, method_list
= save
; i
< size
; i
++, v
++)
1803 SCM_SETCAR (method_list
, *v
);
1804 method_list
= SCM_CDR (method_list
);
1808 /* If we are here, that's that we did it the hard way... */
1809 return scm_vector_to_list (vector
);
1813 scm_compute_applicable_methods (SCM gf
, SCM args
, long len
, int find_method_p
)
1817 SCM l
, fl
, applicable
= SCM_EOL
;
1819 SCM buffer
[BUFFSIZE
], *types
, *p
;
1822 /* Build the list of arguments types */
1823 if (len
>= BUFFSIZE
) {
1824 tmp
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1825 /* NOTE: Using pointers to malloced memory won't work if we
1826 1. have preemtive threading, and,
1827 2. have a GC which moves objects. */
1828 types
= p
= SCM_VELTS(tmp
);
1833 for ( ; !SCM_NULLP (args
); args
= SCM_CDR (args
))
1834 *p
++ = scm_class_of (SCM_CAR (args
));
1836 /* Build a list of all applicable methods */
1837 for (l
= SCM_SLOT (gf
, scm_si_methods
); !SCM_NULLP (l
); l
= SCM_CDR (l
))
1839 fl
= SPEC_OF (SCM_CAR (l
));
1840 /* Only accept accessors which match exactly in first arg. */
1841 if (SCM_ACCESSORP (SCM_CAR (l
))
1842 && (SCM_NULLP (fl
) || types
[0] != SCM_CAR (fl
)))
1844 for (i
= 0; ; i
++, fl
= SCM_CDR (fl
))
1846 if (SCM_INSTANCEP (fl
)
1847 /* We have a dotted argument list */
1848 || (i
>= len
&& SCM_NULLP (fl
)))
1849 { /* both list exhausted */
1850 applicable
= scm_cons (SCM_CAR (l
), applicable
);
1856 || !applicablep (types
[i
], SCM_CAR (fl
)))
1865 CALL_GF2 ("no-applicable-method", gf
, save
);
1866 /* if we are here, it's because no-applicable-method hasn't signaled an error */
1871 : sort_applicable_methods (applicable
, count
, types
));
1875 SCM_PROC (s_sys_compute_applicable_methods
, "%compute-applicable-methods", 2, 0, 0, scm_sys_compute_applicable_methods
);
1878 static const char s_sys_compute_applicable_methods
[] = "%compute-applicable-methods";
1881 scm_sys_compute_applicable_methods (SCM gf
, SCM args
)
1882 #define FUNC_NAME s_sys_compute_applicable_methods
1885 SCM_VALIDATE_GENERIC (1, gf
);
1886 n
= scm_ilength (args
);
1887 SCM_ASSERT (n
>= 0, args
, SCM_ARG2
, FUNC_NAME
);
1888 return scm_compute_applicable_methods (gf
, args
, n
, 1);
1892 SCM_SYMBOL (sym_compute_applicable_methods
, "compute-applicable-methods");
1893 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
));
1895 SCM_SYNTAX (s_atslot_ref
, "@slot-ref", scm_makmmacro
, scm_m_atslot_ref
);
1898 scm_m_atslot_ref (SCM xorig
, SCM env SCM_UNUSED
)
1899 #define FUNC_NAME s_atslot_ref
1901 SCM x
= SCM_CDR (xorig
);
1902 SCM_ASSYNT (scm_ilength (x
) == 2, scm_s_expression
, FUNC_NAME
);
1903 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1904 return scm_cons (SCM_IM_SLOT_REF
, x
);
1909 SCM_SYNTAX (s_atslot_set_x
, "@slot-set!", scm_makmmacro
, scm_m_atslot_set_x
);
1912 scm_m_atslot_set_x (SCM xorig
, SCM env SCM_UNUSED
)
1913 #define FUNC_NAME s_atslot_set_x
1915 SCM x
= SCM_CDR (xorig
);
1916 SCM_ASSYNT (scm_ilength (x
) == 3, scm_s_expression
, FUNC_NAME
);
1917 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1918 return scm_cons (SCM_IM_SLOT_SET_X
, x
);
1923 SCM_SYNTAX (s_atdispatch
, "@dispatch", scm_makmmacro
, scm_m_atdispatch
);
1925 SCM_SYMBOL (sym_atdispatch
, s_atdispatch
);
1928 scm_m_atdispatch (SCM xorig
, SCM env
)
1929 #define FUNC_NAME s_atdispatch
1931 SCM args
, n
, v
, gf
, x
= SCM_CDR (xorig
);
1932 SCM_ASSYNT (scm_ilength (x
) == 4, scm_s_expression
, FUNC_NAME
);
1934 if (!SCM_CONSP (args
) && !SCM_SYMBOLP (args
))
1935 SCM_WRONG_TYPE_ARG (SCM_ARG1
, args
);
1937 n
= SCM_XEVALCAR (x
, env
);
1938 SCM_VALIDATE_INUM (SCM_ARG2
, n
);
1939 SCM_ASSERT_RANGE (0, n
, SCM_INUM (n
) >= 1);
1941 v
= SCM_XEVALCAR (x
, env
);
1942 SCM_VALIDATE_VECTOR (SCM_ARG3
, v
);
1944 gf
= SCM_XEVALCAR (x
, env
);
1945 SCM_VALIDATE_PUREGENERIC (SCM_ARG4
, gf
);
1946 return scm_list_5 (SCM_IM_DISPATCH
, args
, n
, v
, gf
);
1953 lock_cache_mutex (void *m
)
1955 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
1956 scm_lock_mutex (mutex
);
1960 unlock_cache_mutex (void *m
)
1962 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
1963 scm_unlock_mutex (mutex
);
1968 call_memoize_method (void *a
)
1970 SCM args
= SCM_PACK ((scm_t_bits
) a
);
1971 SCM gf
= SCM_CAR (args
);
1972 SCM x
= SCM_CADR (args
);
1973 /* First check if another thread has inserted a method between
1974 * the cache miss and locking the mutex.
1976 SCM cmethod
= scm_mcache_lookup_cmethod (x
, SCM_CDDR (args
));
1977 if (!SCM_FALSEP (cmethod
))
1979 /*fixme* Use scm_apply */
1980 return CALL_GF3 ("memoize-method!", gf
, SCM_CDDR (args
), x
);
1984 scm_memoize_method (SCM x
, SCM args
)
1986 SCM gf
= SCM_CAR (scm_last_pair (x
));
1988 return scm_internal_dynamic_wind (
1990 call_memoize_method
,
1992 (void *) SCM_UNPACK (scm_cons2 (gf
, x
, args
)),
1993 (void *) SCM_UNPACK (SCM_SLOT (gf
, scm_si_cache_mutex
)));
1995 return call_memoize_method ((void *) SCM_UNPACK (scm_cons2 (gf
, x
, args
)));
1999 /******************************************************************************
2001 * A simple make (which will be redefined later in Scheme)
2002 * This version handles only creation of gf, methods and classes (no instances)
2004 * Since this code will disappear when Goops will be fully booted,
2005 * no precaution is taken to be efficient.
2007 ******************************************************************************/
2009 SCM_KEYWORD (k_setter
, "setter");
2010 SCM_KEYWORD (k_specializers
, "specializers");
2011 SCM_KEYWORD (k_procedure
, "procedure");
2012 SCM_KEYWORD (k_dsupers
, "dsupers");
2013 SCM_KEYWORD (k_slots
, "slots");
2014 SCM_KEYWORD (k_gf
, "generic-function");
2016 SCM_DEFINE (scm_make
, "make", 0, 0, 1,
2018 "Make a new object. @var{args} must contain the class and\n"
2019 "all necessary initialization information.")
2020 #define FUNC_NAME s_scm_make
2023 long len
= scm_ilength (args
);
2025 if (len
<= 0 || (len
& 1) == 0)
2026 SCM_WRONG_NUM_ARGS ();
2028 class = SCM_CAR(args
);
2029 args
= SCM_CDR(args
);
2031 if (class == scm_class_generic
|| class == scm_class_generic_with_setter
)
2034 z
= scm_make_struct (class, SCM_INUM0
,
2035 scm_list_4 (SCM_EOL
,
2038 scm_make_mutex ()));
2040 z
= scm_make_struct (class, SCM_INUM0
,
2041 scm_list_3 (SCM_EOL
, SCM_INUM0
, SCM_BOOL_F
));
2043 scm_set_procedure_property_x (z
, scm_sym_name
,
2044 scm_get_keyword (k_name
,
2047 clear_method_cache (z
);
2048 if (class == scm_class_generic_with_setter
)
2050 SCM setter
= scm_get_keyword (k_setter
, args
, SCM_BOOL_F
);
2051 if (!SCM_FALSEP (setter
))
2052 scm_sys_set_object_setter_x (z
, setter
);
2057 z
= scm_sys_allocate_instance (class, args
);
2059 if (class == scm_class_method
2060 || class == scm_class_simple_method
2061 || class == scm_class_accessor
)
2063 SCM_SET_SLOT (z
, scm_si_generic_function
,
2064 scm_i_get_keyword (k_gf
,
2069 SCM_SET_SLOT (z
, scm_si_specializers
,
2070 scm_i_get_keyword (k_specializers
,
2075 SCM_SET_SLOT (z
, scm_si_procedure
,
2076 scm_i_get_keyword (k_procedure
,
2081 SCM_SET_SLOT (z
, scm_si_code_table
, SCM_EOL
);
2085 /* In all the others case, make a new class .... No instance here */
2086 SCM_SET_SLOT (z
, scm_si_name
,
2087 scm_i_get_keyword (k_name
,
2090 scm_str2symbol ("???"),
2092 SCM_SET_SLOT (z
, scm_si_direct_supers
,
2093 scm_i_get_keyword (k_dsupers
,
2098 SCM_SET_SLOT (z
, scm_si_direct_slots
,
2099 scm_i_get_keyword (k_slots
,
2110 SCM_DEFINE (scm_find_method
, "find-method", 0, 0, 1,
2113 #define FUNC_NAME s_scm_find_method
2116 long len
= scm_ilength (l
);
2119 SCM_WRONG_NUM_ARGS ();
2121 gf
= SCM_CAR(l
); l
= SCM_CDR(l
);
2122 SCM_VALIDATE_GENERIC (1, gf
);
2123 if (SCM_NULLP (SCM_SLOT (gf
, scm_si_methods
)))
2124 SCM_MISC_ERROR ("no methods for generic ~S", scm_list_1 (gf
));
2126 return scm_compute_applicable_methods (gf
, l
, len
- 1, 1);
2130 SCM_DEFINE (scm_sys_method_more_specific_p
, "%method-more-specific?", 3, 0, 0,
2131 (SCM m1
, SCM m2
, SCM targs
),
2133 #define FUNC_NAME s_scm_sys_method_more_specific_p
2138 SCM_VALIDATE_METHOD (1, m1
);
2139 SCM_VALIDATE_METHOD (2, m2
);
2140 SCM_ASSERT ((len
= scm_ilength (targs
)) != -1, targs
, SCM_ARG3
, FUNC_NAME
);
2142 /* Verify that all the arguments of targs are classes and place them in a vector*/
2143 v
= scm_c_make_vector (len
, SCM_EOL
);
2145 for (i
= 0, l
= targs
; !SCM_NULLP (l
); i
++, l
= SCM_CDR (l
)) {
2146 SCM_ASSERT (SCM_CLASSP (SCM_CAR (l
)), targs
, SCM_ARG3
, FUNC_NAME
);
2147 SCM_VELTS(v
)[i
] = SCM_CAR(l
);
2149 return more_specificp (m1
, m2
, SCM_VELTS(v
)) ? SCM_BOOL_T
: SCM_BOOL_F
;
2155 /******************************************************************************
2159 ******************************************************************************/
2163 make_stdcls (SCM
*var
, char *name
, SCM meta
, SCM super
, SCM slots
)
2165 SCM tmp
= scm_str2symbol (name
);
2167 *var
= scm_permanent_object (scm_basic_make_class (meta
,
2171 : scm_list_1 (super
),
2177 SCM_KEYWORD (k_slot_definition
, "slot-definition");
2180 create_standard_classes (void)
2183 SCM method_slots
= scm_list_4 (scm_str2symbol ("generic-function"),
2184 scm_str2symbol ("specializers"),
2186 scm_str2symbol ("code-table"));
2187 SCM amethod_slots
= scm_list_1 (scm_list_3 (scm_str2symbol ("slot-definition"),
2189 k_slot_definition
));
2191 SCM mutex_slot
= scm_list_1 (scm_str2symbol ("make-mutex"));
2193 SCM mutex_slot
= SCM_BOOL_F
;
2195 SCM gf_slots
= scm_list_4 (scm_str2symbol ("methods"),
2196 scm_list_3 (scm_str2symbol ("n-specialized"),
2199 scm_list_3 (scm_str2symbol ("used-by"),
2202 scm_list_3 (scm_str2symbol ("cache-mutex"),
2204 scm_closure (scm_list_2 (SCM_EOL
,
2208 /* Foreign class slot classes */
2209 make_stdcls (&scm_class_foreign_slot
, "<foreign-slot>",
2210 scm_class_class
, scm_class_top
, SCM_EOL
);
2211 make_stdcls (&scm_class_protected
, "<protected-slot>",
2212 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2213 make_stdcls (&scm_class_opaque
, "<opaque-slot>",
2214 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2215 make_stdcls (&scm_class_read_only
, "<read-only-slot>",
2216 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2217 make_stdcls (&scm_class_self
, "<self-slot>",
2219 scm_list_2 (scm_class_foreign_slot
, scm_class_read_only
),
2221 make_stdcls (&scm_class_protected_opaque
, "<protected-opaque-slot>",
2223 scm_list_2 (scm_class_protected
, scm_class_opaque
),
2225 make_stdcls (&scm_class_protected_read_only
, "<protected-read-only-slot>",
2227 scm_list_2 (scm_class_protected
, scm_class_read_only
),
2229 make_stdcls (&scm_class_scm
, "<scm-slot>",
2230 scm_class_class
, scm_class_protected
, SCM_EOL
);
2231 make_stdcls (&scm_class_int
, "<int-slot>",
2232 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2233 make_stdcls (&scm_class_float
, "<float-slot>",
2234 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2235 make_stdcls (&scm_class_double
, "<double-slot>",
2236 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2238 /* Continue initialization of class <class> */
2240 slots
= build_class_class_slots ();
2241 SCM_SET_SLOT (scm_class_class
, scm_si_direct_slots
, slots
);
2242 SCM_SET_SLOT (scm_class_class
, scm_si_slots
, slots
);
2243 SCM_SET_SLOT (scm_class_class
, scm_si_getters_n_setters
,
2244 compute_getters_n_setters (slots
));
2246 make_stdcls (&scm_class_foreign_class
, "<foreign-class>",
2247 scm_class_class
, scm_class_class
,
2248 scm_list_2 (scm_list_3 (scm_str2symbol ("constructor"),
2251 scm_list_3 (scm_str2symbol ("destructor"),
2253 scm_class_opaque
)));
2254 make_stdcls (&scm_class_foreign_object
, "<foreign-object>",
2255 scm_class_foreign_class
, scm_class_object
, SCM_EOL
);
2256 SCM_SET_CLASS_FLAGS (scm_class_foreign_object
, SCM_CLASSF_FOREIGN
);
2258 /* scm_class_generic functions classes */
2259 make_stdcls (&scm_class_procedure_class
, "<procedure-class>",
2260 scm_class_class
, scm_class_class
, SCM_EOL
);
2261 make_stdcls (&scm_class_entity_class
, "<entity-class>",
2262 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2263 make_stdcls (&scm_class_operator_class
, "<operator-class>",
2264 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2265 make_stdcls (&scm_class_operator_with_setter_class
,
2266 "<operator-with-setter-class>",
2267 scm_class_class
, scm_class_operator_class
, SCM_EOL
);
2268 make_stdcls (&scm_class_method
, "<method>",
2269 scm_class_class
, scm_class_object
, method_slots
);
2270 make_stdcls (&scm_class_simple_method
, "<simple-method>",
2271 scm_class_class
, scm_class_method
, SCM_EOL
);
2272 SCM_SET_CLASS_FLAGS (scm_class_simple_method
, SCM_CLASSF_SIMPLE_METHOD
);
2273 make_stdcls (&scm_class_accessor
, "<accessor-method>",
2274 scm_class_class
, scm_class_simple_method
, amethod_slots
);
2275 SCM_SET_CLASS_FLAGS (scm_class_accessor
, SCM_CLASSF_ACCESSOR_METHOD
);
2276 make_stdcls (&scm_class_entity
, "<entity>",
2277 scm_class_entity_class
, scm_class_object
, SCM_EOL
);
2278 make_stdcls (&scm_class_entity_with_setter
, "<entity-with-setter>",
2279 scm_class_entity_class
, scm_class_entity
, SCM_EOL
);
2280 make_stdcls (&scm_class_generic
, "<generic>",
2281 scm_class_entity_class
, scm_class_entity
, gf_slots
);
2282 SCM_SET_CLASS_FLAGS (scm_class_generic
, SCM_CLASSF_PURE_GENERIC
);
2283 make_stdcls (&scm_class_generic_with_setter
, "<generic-with-setter>",
2284 scm_class_entity_class
,
2285 scm_list_2 (scm_class_generic
, scm_class_entity_with_setter
),
2288 /* Patch cpl since compute_cpl doesn't support multiple inheritance. */
2289 SCM_SET_SLOT (scm_class_generic_with_setter
, scm_si_cpl
,
2290 scm_append (scm_list_3 (scm_list_2 (scm_class_generic_with_setter
,
2292 SCM_SLOT (scm_class_entity_with_setter
,
2296 SCM_SET_CLASS_FLAGS (scm_class_generic_with_setter
, SCM_CLASSF_PURE_GENERIC
);
2298 /* Primitive types classes */
2299 make_stdcls (&scm_class_boolean
, "<boolean>",
2300 scm_class_class
, scm_class_top
, SCM_EOL
);
2301 make_stdcls (&scm_class_char
, "<char>",
2302 scm_class_class
, scm_class_top
, SCM_EOL
);
2303 make_stdcls (&scm_class_list
, "<list>",
2304 scm_class_class
, scm_class_top
, SCM_EOL
);
2305 make_stdcls (&scm_class_pair
, "<pair>",
2306 scm_class_class
, scm_class_list
, SCM_EOL
);
2307 make_stdcls (&scm_class_null
, "<null>",
2308 scm_class_class
, scm_class_list
, SCM_EOL
);
2309 make_stdcls (&scm_class_string
, "<string>",
2310 scm_class_class
, scm_class_top
, SCM_EOL
);
2311 make_stdcls (&scm_class_symbol
, "<symbol>",
2312 scm_class_class
, scm_class_top
, SCM_EOL
);
2313 make_stdcls (&scm_class_vector
, "<vector>",
2314 scm_class_class
, scm_class_top
, SCM_EOL
);
2315 make_stdcls (&scm_class_number
, "<number>",
2316 scm_class_class
, scm_class_top
, SCM_EOL
);
2317 make_stdcls (&scm_class_complex
, "<complex>",
2318 scm_class_class
, scm_class_number
, SCM_EOL
);
2319 make_stdcls (&scm_class_real
, "<real>",
2320 scm_class_class
, scm_class_complex
, SCM_EOL
);
2321 make_stdcls (&scm_class_integer
, "<integer>",
2322 scm_class_class
, scm_class_real
, SCM_EOL
);
2323 make_stdcls (&scm_class_keyword
, "<keyword>",
2324 scm_class_class
, scm_class_top
, SCM_EOL
);
2325 make_stdcls (&scm_class_unknown
, "<unknown>",
2326 scm_class_class
, scm_class_top
, SCM_EOL
);
2327 make_stdcls (&scm_class_procedure
, "<procedure>",
2328 scm_class_procedure_class
, scm_class_top
, SCM_EOL
);
2329 make_stdcls (&scm_class_procedure_with_setter
, "<procedure-with-setter>",
2330 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2331 make_stdcls (&scm_class_primitive_generic
, "<primitive-generic>",
2332 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2333 make_stdcls (&scm_class_port
, "<port>",
2334 scm_class_class
, scm_class_top
, SCM_EOL
);
2335 make_stdcls (&scm_class_input_port
, "<input-port>",
2336 scm_class_class
, scm_class_port
, SCM_EOL
);
2337 make_stdcls (&scm_class_output_port
, "<output-port>",
2338 scm_class_class
, scm_class_port
, SCM_EOL
);
2339 make_stdcls (&scm_class_input_output_port
, "<input-output-port>",
2341 scm_list_2 (scm_class_input_port
, scm_class_output_port
),
2345 /**********************************************************************
2349 **********************************************************************/
2352 make_class_from_template (char *template, char *type_name
, SCM supers
)
2358 sprintf (buffer
, template, type_name
);
2359 name
= scm_str2symbol (buffer
);
2362 name
= SCM_GOOPS_UNBOUND
;
2364 class = scm_permanent_object (scm_basic_make_class (scm_class_class
,
2369 /* Only define name if doesn't already exist. */
2370 if (!SCM_GOOPS_UNBOUNDP (name
)
2371 && SCM_FALSEP (scm_call_2 (scm_goops_lookup_closure
, name
, SCM_BOOL_F
)))
2372 DEFVAR (name
, class);
2377 scm_make_extended_class (char *type_name
)
2379 return make_class_from_template ("<%s>",
2381 scm_list_1 (scm_class_top
));
2385 create_smob_classes (void)
2389 scm_smob_class
= (SCM
*) malloc (255 * sizeof (SCM
));
2390 for (i
= 0; i
< 255; ++i
)
2391 scm_smob_class
[i
] = 0;
2393 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_big
)] = scm_class_integer
;
2394 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_real
)] = scm_class_real
;
2395 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_complex
)] = scm_class_complex
;
2396 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_keyword
)] = scm_class_keyword
;
2398 for (i
= 0; i
< scm_numsmob
; ++i
)
2399 if (!scm_smob_class
[i
])
2400 scm_smob_class
[i
] = scm_make_extended_class (SCM_SMOBNAME (i
));
2404 scm_make_port_classes (long ptobnum
, char *type_name
)
2406 SCM c
, class = make_class_from_template ("<%s-port>",
2408 scm_list_1 (scm_class_port
));
2409 scm_port_class
[SCM_IN_PCLASS_INDEX
+ ptobnum
]
2410 = make_class_from_template ("<%s-input-port>",
2412 scm_list_2 (class, scm_class_input_port
));
2413 scm_port_class
[SCM_OUT_PCLASS_INDEX
+ ptobnum
]
2414 = make_class_from_template ("<%s-output-port>",
2416 scm_list_2 (class, scm_class_output_port
));
2417 scm_port_class
[SCM_INOUT_PCLASS_INDEX
+ ptobnum
]
2419 = make_class_from_template ("<%s-input-output-port>",
2421 scm_list_2 (class, scm_class_input_output_port
));
2422 /* Patch cpl (since this tree is too complex for the C level compute-cpl) */
2423 SCM_SET_SLOT (c
, scm_si_cpl
,
2424 scm_cons2 (c
, class, SCM_SLOT (scm_class_input_output_port
, scm_si_cpl
)));
2428 create_port_classes (void)
2432 scm_port_class
= (SCM
*) malloc (3 * 256 * sizeof (SCM
));
2433 for (i
= 0; i
< 3 * 256; ++i
)
2434 scm_port_class
[i
] = 0;
2436 for (i
= 0; i
< scm_numptob
; ++i
)
2437 scm_make_port_classes (i
, SCM_PTOBNAME (i
));
2441 make_struct_class (void *closure SCM_UNUSED
, SCM key SCM_UNUSED
,
2442 SCM data
, SCM prev SCM_UNUSED
)
2444 if (!SCM_FALSEP (SCM_STRUCT_TABLE_NAME (data
)))
2445 SCM_SET_STRUCT_TABLE_CLASS (data
,
2446 scm_make_extended_class
2447 (SCM_SYMBOL_CHARS (SCM_STRUCT_TABLE_NAME (data
))));
2448 return SCM_UNSPECIFIED
;
2452 create_struct_classes (void)
2454 scm_internal_hash_fold (make_struct_class
, 0, SCM_BOOL_F
, scm_struct_table
);
2457 /**********************************************************************
2461 **********************************************************************/
2466 if (!goops_loaded_p
)
2467 scm_c_resolve_module ("oop goops");
2472 scm_make_foreign_object (SCM
class, SCM initargs
)
2473 #define FUNC_NAME s_scm_make
2475 void * (*constructor
) (SCM
)
2476 = (void * (*) (SCM
)) SCM_SLOT (class, scm_si_constructor
);
2477 if (constructor
== 0)
2478 SCM_MISC_ERROR ("Can't make instances of class ~S", scm_list_1 (class));
2479 return scm_wrap_object (class, constructor (initargs
));
2485 scm_free_foreign_object (SCM
*class, SCM
*data
)
2487 size_t (*destructor
) (void *)
2488 = (size_t (*) (void *)) class[scm_si_destructor
];
2489 return destructor (data
);
2493 scm_make_class (SCM meta
, char *s_name
, SCM supers
, size_t size
,
2494 void * (*constructor
) (SCM initargs
),
2495 size_t (*destructor
) (void *))
2498 name
= scm_str2symbol (s_name
);
2499 if (SCM_NULLP (supers
))
2500 supers
= scm_list_1 (scm_class_foreign_object
);
2501 class = scm_basic_basic_make_class (meta
, name
, supers
, SCM_EOL
);
2502 scm_sys_inherit_magic_x (class, supers
);
2504 if (destructor
!= 0)
2506 SCM_SET_SLOT (class, scm_si_destructor
, (SCM
) destructor
);
2507 SCM_SET_CLASS_DESTRUCTOR (class, scm_free_foreign_object
);
2511 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
2512 SCM_SET_CLASS_INSTANCE_SIZE (class, size
);
2515 SCM_SET_SLOT (class, scm_si_layout
, scm_str2symbol (""));
2516 SCM_SET_SLOT (class, scm_si_constructor
, (SCM
) constructor
);
2521 SCM_SYMBOL (sym_o
, "o");
2522 SCM_SYMBOL (sym_x
, "x");
2524 SCM_KEYWORD (k_accessor
, "accessor");
2525 SCM_KEYWORD (k_getter
, "getter");
2528 default_setter (SCM obj SCM_UNUSED
, SCM c SCM_UNUSED
)
2530 scm_misc_error ("slot-set!", "read-only slot", SCM_EOL
);
2535 scm_add_slot (SCM
class, char *slot_name
, SCM slot_class
,
2536 SCM (*getter
) (SCM obj
),
2537 SCM (*setter
) (SCM obj
, SCM x
),
2538 char *accessor_name
)
2541 SCM get
= scm_c_make_subr ("goops:get", scm_tc7_subr_1
, getter
);
2542 SCM set
= scm_c_make_subr ("goops:set", scm_tc7_subr_2
,
2543 setter
? setter
: default_setter
);
2544 SCM getm
= scm_closure (scm_list_2 (scm_list_1 (sym_o
),
2545 scm_list_2 (get
, sym_o
)),
2547 SCM setm
= scm_closure (scm_list_2 (scm_list_2 (sym_o
, sym_x
),
2548 scm_list_3 (set
, sym_o
, sym_x
)),
2551 SCM name
= scm_str2symbol (slot_name
);
2552 SCM aname
= scm_str2symbol (accessor_name
);
2553 SCM gf
= scm_ensure_accessor (aname
);
2554 SCM slot
= scm_list_5 (name
,
2557 setter
? k_accessor
: k_getter
,
2559 SCM gns
= scm_list_4 (name
, SCM_BOOL_F
, get
, set
);
2561 scm_add_method (gf
, scm_make (scm_list_5 (scm_class_accessor
,
2566 scm_add_method (scm_setter (gf
),
2567 scm_make (scm_list_5 (scm_class_accessor
,
2569 scm_list_2 (class, scm_class_top
),
2574 SCM_SET_SLOT (class, scm_si_slots
,
2575 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_slots
),
2576 scm_list_1 (slot
))));
2577 SCM_SET_SLOT (class, scm_si_getters_n_setters
,
2578 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_getters_n_setters
),
2579 scm_list_1 (gns
))));
2583 long n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
2585 SCM_SET_SLOT (class, scm_si_nfields
, SCM_MAKINUM (n
+ 1));
2590 scm_wrap_object (SCM
class, void *data
)
2594 SCM_SETCDR (z
, SCM_PACK ((scm_t_bits
) data
));
2595 SCM_SET_STRUCT_GC_CHAIN (z
, 0);
2596 SCM_SETCAR (z
, SCM_UNPACK (SCM_CDR (class)) | scm_tc3_struct
);
2603 scm_wrap_component (SCM
class, SCM container
, void *data
)
2605 SCM obj
= scm_wrap_object (class, data
);
2606 SCM handle
= scm_hash_fn_create_handle_x (scm_components
,
2612 SCM_SETCDR (handle
, container
);
2617 scm_ensure_accessor (SCM name
)
2619 SCM gf
= scm_call_2 (SCM_TOP_LEVEL_LOOKUP_CLOSURE
, name
, SCM_BOOL_F
);
2620 if (!SCM_IS_A_P (gf
, scm_class_generic_with_setter
))
2622 gf
= scm_make (scm_list_3 (scm_class_generic
, k_name
, name
));
2623 gf
= scm_make (scm_list_5 (scm_class_generic_with_setter
,
2624 k_name
, name
, k_setter
, gf
));
2629 SCM_SYMBOL (sym_internal_add_method_x
, "internal-add-method!");
2632 scm_add_method (SCM gf
, SCM m
)
2634 scm_eval (scm_list_3 (sym_internal_add_method_x
, gf
, m
), scm_module_goops
);
2639 * Debugging utilities
2642 SCM_DEFINE (scm_pure_generic_p
, "pure-generic?", 1, 0, 0,
2644 "Return @code{#t} if @var{obj} is a pure generic.")
2645 #define FUNC_NAME s_scm_pure_generic_p
2647 return SCM_BOOL (SCM_PUREGENERICP (obj
));
2651 #endif /* GUILE_DEBUG */
2657 SCM_DEFINE (scm_sys_goops_loaded
, "%goops-loaded", 0, 0, 0,
2659 "Announce that GOOPS is loaded and perform initialization\n"
2660 "on the C level which depends on the loaded GOOPS modules.")
2661 #define FUNC_NAME s_scm_sys_goops_loaded
2664 var_compute_applicable_methods
=
2665 scm_sym2var (sym_compute_applicable_methods
, scm_goops_lookup_closure
,
2667 return SCM_UNSPECIFIED
;
2671 SCM scm_module_goops
;
2674 scm_init_goops_builtins (void)
2676 scm_module_goops
= scm_current_module ();
2677 scm_goops_lookup_closure
= scm_module_lookup_closure (scm_module_goops
);
2679 /* Not really necessary right now, but who knows...
2681 scm_permanent_object (scm_module_goops
);
2682 scm_permanent_object (scm_goops_lookup_closure
);
2684 scm_components
= scm_permanent_object (scm_make_weak_key_hash_table
2685 (SCM_MAKINUM (37)));
2687 goops_rstate
= scm_c_make_rstate ("GOOPS", 5);
2689 #ifndef SCM_MAGIC_SNARFER
2690 #include "libguile/goops.x"
2693 list_of_no_method
= scm_permanent_object (scm_list_1 (sym_no_method
));
2695 hell
= scm_must_malloc (hell_size
, "hell");
2697 scm_mutex_init (&hell_mutex
);
2700 create_basic_classes ();
2701 create_standard_classes ();
2702 create_smob_classes ();
2703 create_struct_classes ();
2704 create_port_classes ();
2707 SCM name
= scm_str2symbol ("no-applicable-method");
2708 scm_no_applicable_method
2709 = scm_permanent_object (scm_make (scm_list_3 (scm_class_generic
,
2712 DEFVAR (name
, scm_no_applicable_method
);
2715 return SCM_UNSPECIFIED
;
2721 scm_c_define_gsubr ("%init-goops-builtins", 0, 0, 0,
2722 scm_init_goops_builtins
);