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
)
1306 /* Set all slots to unbound */
1307 for (i
= 0; i
< n
; i
++)
1308 m
[i
] = SCM_GOOPS_UNBOUND
;
1310 return scm_alloc_double_cell ((((scm_t_bits
) SCM_STRUCT_DATA (class))
1312 (scm_t_bits
) m
, 0, 0);
1315 SCM_DEFINE (scm_sys_allocate_instance
, "%allocate-instance", 2, 0, 0,
1316 (SCM
class, SCM initargs
),
1317 "Create a new instance of class @var{class} and initialize it\n"
1318 "from the arguments @var{initargs}.")
1319 #define FUNC_NAME s_scm_sys_allocate_instance
1324 SCM_VALIDATE_CLASS (1, class);
1326 /* Most instances */
1327 if (SCM_CLASS_FLAGS (class) & SCM_STRUCTF_LIGHT
)
1329 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1330 m
= (SCM
*) scm_must_malloc (n
* sizeof (SCM
), "instance");
1331 return wrap_init (class, m
, n
);
1334 /* Foreign objects */
1335 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_FOREIGN
)
1336 return scm_make_foreign_object (class, initargs
);
1338 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1341 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_ENTITY
)
1343 m
= (SCM
*) scm_alloc_struct (n
,
1344 scm_struct_entity_n_extra_words
,
1346 m
[scm_struct_i_setter
] = SCM_BOOL_F
;
1347 m
[scm_struct_i_procedure
] = SCM_BOOL_F
;
1348 /* Generic functions */
1349 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_PURE_GENERIC
)
1351 SCM gf
= wrap_init (class, m
, n
);
1352 clear_method_cache (gf
);
1356 return wrap_init (class, m
, n
);
1360 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_METACLASS
)
1364 /* allocate class object */
1365 SCM z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
1367 SCM_SET_SLOT (z
, scm_si_print
, SCM_GOOPS_UNBOUND
);
1368 for (i
= scm_si_goops_fields
; i
< n
; i
++)
1369 SCM_SET_SLOT (z
, i
, SCM_GOOPS_UNBOUND
);
1371 if (SCM_SUBCLASSP (class, scm_class_entity_class
))
1372 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
| SCM_CLASSF_ENTITY
);
1373 else if (SCM_SUBCLASSP (class, scm_class_operator_class
))
1374 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
);
1379 /* Non-light instances */
1381 m
= (SCM
*) scm_alloc_struct (n
,
1382 scm_struct_n_extra_words
,
1384 return wrap_init (class, m
, n
);
1389 SCM_DEFINE (scm_sys_set_object_setter_x
, "%set-object-setter!", 2, 0, 0,
1390 (SCM obj
, SCM setter
),
1392 #define FUNC_NAME s_scm_sys_set_object_setter_x
1394 SCM_ASSERT (SCM_STRUCTP (obj
)
1395 && ((SCM_CLASS_FLAGS (obj
) & SCM_CLASSF_OPERATOR
)
1396 || SCM_I_ENTITYP (obj
)),
1400 if (SCM_I_ENTITYP (obj
))
1401 SCM_SET_ENTITY_SETTER (obj
, setter
);
1403 SCM_OPERATOR_CLASS (obj
)->setter
= setter
;
1404 return SCM_UNSPECIFIED
;
1408 /******************************************************************************
1410 * %modify-instance (used by change-class to modify in place)
1412 ******************************************************************************/
1414 SCM_DEFINE (scm_sys_modify_instance
, "%modify-instance", 2, 0, 0,
1417 #define FUNC_NAME s_scm_sys_modify_instance
1419 SCM_VALIDATE_INSTANCE (1, old
);
1420 SCM_VALIDATE_INSTANCE (2, new);
1422 /* Exchange the data contained in old and new. We exchange rather than
1423 * scratch the old value with new to be correct with GC.
1424 * See "Class redefinition protocol above".
1428 SCM car
= SCM_CAR (old
);
1429 SCM cdr
= SCM_CDR (old
);
1430 SCM_SETCAR (old
, SCM_CAR (new));
1431 SCM_SETCDR (old
, SCM_CDR (new));
1432 SCM_SETCAR (new, car
);
1433 SCM_SETCDR (new, cdr
);
1436 return SCM_UNSPECIFIED
;
1440 SCM_DEFINE (scm_sys_modify_class
, "%modify-class", 2, 0, 0,
1443 #define FUNC_NAME s_scm_sys_modify_class
1445 SCM_VALIDATE_CLASS (1, old
);
1446 SCM_VALIDATE_CLASS (2, new);
1450 SCM car
= SCM_CAR (old
);
1451 SCM cdr
= SCM_CDR (old
);
1452 SCM_SETCAR (old
, SCM_CAR (new));
1453 SCM_SETCDR (old
, SCM_CDR (new));
1454 SCM_STRUCT_DATA (old
)[scm_vtable_index_vtable
] = SCM_UNPACK (old
);
1455 SCM_SETCAR (new, car
);
1456 SCM_SETCDR (new, cdr
);
1457 SCM_STRUCT_DATA (new)[scm_vtable_index_vtable
] = SCM_UNPACK (new);
1460 return SCM_UNSPECIFIED
;
1464 SCM_DEFINE (scm_sys_invalidate_class
, "%invalidate-class", 1, 0, 0,
1467 #define FUNC_NAME s_scm_sys_invalidate_class
1469 SCM_VALIDATE_CLASS (1, class);
1470 SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID
);
1471 return SCM_UNSPECIFIED
;
1475 /* When instances change class, they finally get a new body, but
1476 * before that, they go through purgatory in hell. Odd as it may
1477 * seem, this data structure saves us from eternal suffering in
1478 * infinite recursions.
1481 static scm_t_bits
**hell
;
1482 static long n_hell
= 1; /* one place for the evil one himself */
1483 static long hell_size
= 4;
1485 static scm_t_mutex hell_mutex
;
1492 for (i
= 1; i
< n_hell
; ++i
)
1493 if (SCM_STRUCT_DATA (o
) == hell
[i
])
1499 go_to_hell (void *o
)
1501 SCM obj
= SCM_PACK ((scm_t_bits
) o
);
1503 scm_mutex_lock (&hell_mutex
);
1505 if (n_hell
== hell_size
)
1507 long new_size
= 2 * hell_size
;
1508 hell
= scm_must_realloc (hell
, hell_size
, new_size
, "hell");
1509 hell_size
= new_size
;
1511 hell
[n_hell
++] = SCM_STRUCT_DATA (obj
);
1513 scm_mutex_unlock (&hell_mutex
);
1518 go_to_heaven (void *o
)
1521 scm_mutex_lock (&hell_mutex
);
1523 hell
[burnin (SCM_PACK ((scm_t_bits
) o
))] = hell
[--n_hell
];
1525 scm_mutex_unlock (&hell_mutex
);
1530 SCM_SYMBOL (scm_sym_change_class
, "change-class");
1533 purgatory (void *args
)
1535 return scm_apply_0 (GETVAR (scm_sym_change_class
),
1536 SCM_PACK ((scm_t_bits
) args
));
1540 scm_change_object_class (SCM obj
, SCM old_class SCM_UNUSED
, SCM new_class
)
1543 scm_internal_dynamic_wind (go_to_hell
, purgatory
, go_to_heaven
,
1544 (void *) SCM_UNPACK (scm_list_2 (obj
, new_class
)),
1545 (void *) SCM_UNPACK (obj
));
1548 /******************************************************************************
1554 * GGG E N E R I C F U N C T I O N S
1556 * This implementation provides
1557 * - generic functions (with class specializers)
1560 * - a hard-coded MOP for standard gf, which can be overloaded for non-std gf
1562 ******************************************************************************/
1564 SCM_KEYWORD (k_name
, "name");
1566 SCM_SYMBOL (sym_no_method
, "no-method");
1568 static SCM list_of_no_method
;
1570 SCM_SYMBOL (scm_sym_args
, "args");
1573 scm_make_method_cache (SCM gf
)
1575 return scm_list_5 (SCM_IM_DISPATCH
,
1578 scm_c_make_vector (SCM_INITIAL_MCACHE_SIZE
,
1584 clear_method_cache (SCM gf
)
1586 SCM cache
= scm_make_method_cache (gf
);
1587 SCM_SET_ENTITY_PROCEDURE (gf
, cache
);
1588 SCM_SET_SLOT (gf
, scm_si_used_by
, SCM_BOOL_F
);
1591 SCM_DEFINE (scm_sys_invalidate_method_cache_x
, "%invalidate-method-cache!", 1, 0, 0,
1594 #define FUNC_NAME s_scm_sys_invalidate_method_cache_x
1597 SCM_ASSERT (SCM_PUREGENERICP (gf
), gf
, SCM_ARG1
, FUNC_NAME
);
1598 used_by
= SCM_SLOT (gf
, scm_si_used_by
);
1599 if (!SCM_FALSEP (used_by
))
1601 SCM methods
= SCM_SLOT (gf
, scm_si_methods
);
1602 for (; SCM_CONSP (used_by
); used_by
= SCM_CDR (used_by
))
1603 scm_sys_invalidate_method_cache_x (SCM_CAR (used_by
));
1604 clear_method_cache (gf
);
1605 for (; SCM_CONSP (methods
); methods
= SCM_CDR (methods
))
1606 SCM_SET_SLOT (SCM_CAR (methods
), scm_si_code_table
, SCM_EOL
);
1609 SCM n
= SCM_SLOT (gf
, scm_si_n_specialized
);
1610 /* The sign of n is a flag indicating rest args. */
1611 SCM_SET_MCACHE_N_SPECIALIZED (SCM_ENTITY_PROCEDURE (gf
), n
);
1613 return SCM_UNSPECIFIED
;
1617 SCM_DEFINE (scm_generic_capability_p
, "generic-capability?", 1, 0, 0,
1620 #define FUNC_NAME s_scm_generic_capability_p
1622 SCM_ASSERT (!SCM_FALSEP (scm_procedure_p (proc
)),
1623 proc
, SCM_ARG1
, FUNC_NAME
);
1624 return (scm_subr_p (proc
) && SCM_SUBR_GENERIC (proc
)
1630 SCM_DEFINE (scm_enable_primitive_generic_x
, "enable-primitive-generic!", 0, 0, 1,
1633 #define FUNC_NAME s_scm_enable_primitive_generic_x
1635 SCM_VALIDATE_REST_ARGUMENT (subrs
);
1636 while (!SCM_NULLP (subrs
))
1638 SCM subr
= SCM_CAR (subrs
);
1639 SCM_ASSERT (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
),
1640 subr
, SCM_ARGn
, FUNC_NAME
);
1641 *SCM_SUBR_GENERIC (subr
)
1642 = scm_make (scm_list_3 (scm_class_generic
,
1645 subrs
= SCM_CDR (subrs
);
1647 return SCM_UNSPECIFIED
;
1651 SCM_DEFINE (scm_primitive_generic_generic
, "primitive-generic-generic", 1, 0, 0,
1654 #define FUNC_NAME s_scm_primitive_generic_generic
1656 if (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
))
1658 SCM gf
= *SCM_SUBR_GENERIC (subr
);
1662 SCM_WRONG_TYPE_ARG (SCM_ARG1
, subr
);
1666 /******************************************************************************
1668 * Protocol for calling a generic fumction
1669 * This protocol is roughly equivalent to (parameter are a little bit different
1670 * for efficiency reasons):
1672 * + apply-generic (gf args)
1673 * + compute-applicable-methods (gf args ...)
1674 * + sort-applicable-methods (methods args)
1675 * + apply-methods (gf methods args)
1677 * apply-methods calls make-next-method to build the "continuation" of a a
1678 * method. Applying a next-method will call apply-next-method which in
1679 * turn will call apply again to call effectively the following method.
1681 ******************************************************************************/
1684 applicablep (SCM actual
, SCM formal
)
1686 /* We already know that the cpl is well formed. */
1687 return !SCM_FALSEP (scm_c_memq (formal
, SCM_SLOT (actual
, scm_si_cpl
)));
1691 more_specificp (SCM m1
, SCM m2
, SCM
*targs
)
1693 register SCM s1
, s2
;
1697 * m1 and m2 can have != length (i.e. one can be one element longer than the
1698 * other when we have a dotted parameter list). For instance, with the call
1701 * (define-method M (a . l) ....)
1702 * (define-method M (a) ....)
1704 * we consider that the second method is more specific.
1706 * BTW, targs is an array of types. We don't need it's size since
1707 * we already know that m1 and m2 are applicable (no risk to go past
1708 * the end of this array).
1711 for (i
=0,s1
=SPEC_OF(m1
),s2
=SPEC_OF(m2
); ; i
++,s1
=SCM_CDR(s1
),s2
=SCM_CDR(s2
)) {
1712 if (SCM_NULLP(s1
)) return 1;
1713 if (SCM_NULLP(s2
)) return 0;
1714 if (SCM_CAR(s1
) != SCM_CAR(s2
)) {
1715 register SCM l
, cs1
= SCM_CAR(s1
), cs2
= SCM_CAR(s2
);
1717 for (l
= SCM_SLOT (targs
[i
], scm_si_cpl
); ; l
= SCM_CDR(l
)) {
1718 if (cs1
== SCM_CAR(l
))
1720 if (cs2
== SCM_CAR(l
))
1723 return 0;/* should not occur! */
1726 return 0; /* should not occur! */
1729 #define BUFFSIZE 32 /* big enough for most uses */
1732 scm_i_vector2list (SCM l
, long len
)
1735 SCM z
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1737 for (j
= 0; j
< len
; j
++, l
= SCM_CDR (l
)) {
1738 SCM_VELTS (z
)[j
] = SCM_CAR (l
);
1744 sort_applicable_methods (SCM method_list
, long size
, SCM
*targs
)
1747 SCM
*v
, vector
= SCM_EOL
;
1748 SCM buffer
[BUFFSIZE
];
1749 SCM save
= method_list
;
1751 /* For reasonably sized method_lists we can try to avoid all the
1752 * consing and reorder the list in place...
1753 * This idea is due to David McClain <Dave_McClain@msn.com>
1755 if (size
<= BUFFSIZE
)
1757 for (i
= 0; i
< size
; i
++)
1759 buffer
[i
] = SCM_CAR (method_list
);
1760 method_list
= SCM_CDR (method_list
);
1766 /* Too many elements in method_list to keep everything locally */
1767 vector
= scm_i_vector2list (save
, size
);
1768 v
= SCM_VELTS (vector
);
1771 /* Use a simple shell sort since it is generally faster than qsort on
1772 * small vectors (which is probably mostly the case when we have to
1773 * sort a list of applicable methods).
1775 for (incr
= size
/ 2; incr
; incr
/= 2)
1777 for (i
= incr
; i
< size
; i
++)
1779 for (j
= i
- incr
; j
>= 0; j
-= incr
)
1781 if (more_specificp (v
[j
], v
[j
+incr
], targs
))
1785 SCM tmp
= v
[j
+ incr
];
1793 if (size
<= BUFFSIZE
)
1795 /* We did it in locally, so restore the original list (reordered) in-place */
1796 for (i
= 0, method_list
= save
; i
< size
; i
++, v
++)
1798 SCM_SETCAR (method_list
, *v
);
1799 method_list
= SCM_CDR (method_list
);
1803 /* If we are here, that's that we did it the hard way... */
1804 return scm_vector_to_list (vector
);
1808 scm_compute_applicable_methods (SCM gf
, SCM args
, long len
, int find_method_p
)
1812 SCM l
, fl
, applicable
= SCM_EOL
;
1814 SCM buffer
[BUFFSIZE
], *types
, *p
;
1817 /* Build the list of arguments types */
1818 if (len
>= BUFFSIZE
) {
1819 tmp
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1820 /* NOTE: Using pointers to malloced memory won't work if we
1821 1. have preemtive threading, and,
1822 2. have a GC which moves objects. */
1823 types
= p
= SCM_VELTS(tmp
);
1828 for ( ; !SCM_NULLP (args
); args
= SCM_CDR (args
))
1829 *p
++ = scm_class_of (SCM_CAR (args
));
1831 /* Build a list of all applicable methods */
1832 for (l
= SCM_SLOT (gf
, scm_si_methods
); !SCM_NULLP (l
); l
= SCM_CDR (l
))
1834 fl
= SPEC_OF (SCM_CAR (l
));
1835 /* Only accept accessors which match exactly in first arg. */
1836 if (SCM_ACCESSORP (SCM_CAR (l
))
1837 && (SCM_NULLP (fl
) || types
[0] != SCM_CAR (fl
)))
1839 for (i
= 0; ; i
++, fl
= SCM_CDR (fl
))
1841 if (SCM_INSTANCEP (fl
)
1842 /* We have a dotted argument list */
1843 || (i
>= len
&& SCM_NULLP (fl
)))
1844 { /* both list exhausted */
1845 applicable
= scm_cons (SCM_CAR (l
), applicable
);
1851 || !applicablep (types
[i
], SCM_CAR (fl
)))
1860 CALL_GF2 ("no-applicable-method", gf
, save
);
1861 /* if we are here, it's because no-applicable-method hasn't signaled an error */
1866 : sort_applicable_methods (applicable
, count
, types
));
1870 SCM_PROC (s_sys_compute_applicable_methods
, "%compute-applicable-methods", 2, 0, 0, scm_sys_compute_applicable_methods
);
1873 static const char s_sys_compute_applicable_methods
[] = "%compute-applicable-methods";
1876 scm_sys_compute_applicable_methods (SCM gf
, SCM args
)
1877 #define FUNC_NAME s_sys_compute_applicable_methods
1880 SCM_VALIDATE_GENERIC (1, gf
);
1881 n
= scm_ilength (args
);
1882 SCM_ASSERT (n
>= 0, args
, SCM_ARG2
, FUNC_NAME
);
1883 return scm_compute_applicable_methods (gf
, args
, n
, 1);
1887 SCM_SYMBOL (sym_compute_applicable_methods
, "compute-applicable-methods");
1888 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
));
1890 SCM_SYNTAX (s_atslot_ref
, "@slot-ref", scm_makmmacro
, scm_m_atslot_ref
);
1893 scm_m_atslot_ref (SCM xorig
, SCM env SCM_UNUSED
)
1894 #define FUNC_NAME s_atslot_ref
1896 SCM x
= SCM_CDR (xorig
);
1897 SCM_ASSYNT (scm_ilength (x
) == 2, scm_s_expression
, FUNC_NAME
);
1898 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1899 return scm_cons (SCM_IM_SLOT_REF
, x
);
1904 SCM_SYNTAX (s_atslot_set_x
, "@slot-set!", scm_makmmacro
, scm_m_atslot_set_x
);
1907 scm_m_atslot_set_x (SCM xorig
, SCM env SCM_UNUSED
)
1908 #define FUNC_NAME s_atslot_set_x
1910 SCM x
= SCM_CDR (xorig
);
1911 SCM_ASSYNT (scm_ilength (x
) == 3, scm_s_expression
, FUNC_NAME
);
1912 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1913 return scm_cons (SCM_IM_SLOT_SET_X
, x
);
1918 SCM_SYNTAX (s_atdispatch
, "@dispatch", scm_makmmacro
, scm_m_atdispatch
);
1920 SCM_SYMBOL (sym_atdispatch
, s_atdispatch
);
1923 scm_m_atdispatch (SCM xorig
, SCM env
)
1924 #define FUNC_NAME s_atdispatch
1926 SCM args
, n
, v
, gf
, x
= SCM_CDR (xorig
);
1927 SCM_ASSYNT (scm_ilength (x
) == 4, scm_s_expression
, FUNC_NAME
);
1929 if (!SCM_CONSP (args
) && !SCM_SYMBOLP (args
))
1930 SCM_WRONG_TYPE_ARG (SCM_ARG1
, args
);
1932 n
= SCM_XEVALCAR (x
, env
);
1933 SCM_VALIDATE_INUM (SCM_ARG2
, n
);
1934 SCM_ASSERT_RANGE (0, n
, SCM_INUM (n
) >= 1);
1936 v
= SCM_XEVALCAR (x
, env
);
1937 SCM_VALIDATE_VECTOR (SCM_ARG3
, v
);
1939 gf
= SCM_XEVALCAR (x
, env
);
1940 SCM_VALIDATE_PUREGENERIC (SCM_ARG4
, gf
);
1941 return scm_list_5 (SCM_IM_DISPATCH
, args
, n
, v
, gf
);
1948 lock_cache_mutex (void *m
)
1950 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
1951 scm_lock_mutex (mutex
);
1955 unlock_cache_mutex (void *m
)
1957 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
1958 scm_unlock_mutex (mutex
);
1963 call_memoize_method (void *a
)
1965 SCM args
= SCM_PACK ((scm_t_bits
) a
);
1966 SCM gf
= SCM_CAR (args
);
1967 SCM x
= SCM_CADR (args
);
1968 /* First check if another thread has inserted a method between
1969 * the cache miss and locking the mutex.
1971 SCM cmethod
= scm_mcache_lookup_cmethod (x
, SCM_CDDR (args
));
1972 if (!SCM_FALSEP (cmethod
))
1974 /*fixme* Use scm_apply */
1975 return CALL_GF3 ("memoize-method!", gf
, SCM_CDDR (args
), x
);
1979 scm_memoize_method (SCM x
, SCM args
)
1981 SCM gf
= SCM_CAR (scm_last_pair (x
));
1983 return scm_internal_dynamic_wind (
1985 call_memoize_method
,
1987 (void *) SCM_UNPACK (scm_cons2 (gf
, x
, args
)),
1988 (void *) SCM_UNPACK (SCM_SLOT (gf
, scm_si_cache_mutex
)));
1990 return call_memoize_method ((void *) SCM_UNPACK (scm_cons2 (gf
, x
, args
)));
1994 /******************************************************************************
1996 * A simple make (which will be redefined later in Scheme)
1997 * This version handles only creation of gf, methods and classes (no instances)
1999 * Since this code will disappear when Goops will be fully booted,
2000 * no precaution is taken to be efficient.
2002 ******************************************************************************/
2004 SCM_KEYWORD (k_setter
, "setter");
2005 SCM_KEYWORD (k_specializers
, "specializers");
2006 SCM_KEYWORD (k_procedure
, "procedure");
2007 SCM_KEYWORD (k_dsupers
, "dsupers");
2008 SCM_KEYWORD (k_slots
, "slots");
2009 SCM_KEYWORD (k_gf
, "generic-function");
2011 SCM_DEFINE (scm_make
, "make", 0, 0, 1,
2013 "Make a new object. @var{args} must contain the class and\n"
2014 "all necessary initialization information.")
2015 #define FUNC_NAME s_scm_make
2018 long len
= scm_ilength (args
);
2020 if (len
<= 0 || (len
& 1) == 0)
2021 SCM_WRONG_NUM_ARGS ();
2023 class = SCM_CAR(args
);
2024 args
= SCM_CDR(args
);
2026 if (class == scm_class_generic
|| class == scm_class_generic_with_setter
)
2029 z
= scm_make_struct (class, SCM_INUM0
,
2030 scm_list_4 (SCM_EOL
,
2033 scm_make_mutex ()));
2035 z
= scm_make_struct (class, SCM_INUM0
,
2036 scm_list_3 (SCM_EOL
, SCM_INUM0
, SCM_BOOL_F
));
2038 scm_set_procedure_property_x (z
, scm_sym_name
,
2039 scm_get_keyword (k_name
,
2042 clear_method_cache (z
);
2043 if (class == scm_class_generic_with_setter
)
2045 SCM setter
= scm_get_keyword (k_setter
, args
, SCM_BOOL_F
);
2046 if (!SCM_FALSEP (setter
))
2047 scm_sys_set_object_setter_x (z
, setter
);
2052 z
= scm_sys_allocate_instance (class, args
);
2054 if (class == scm_class_method
2055 || class == scm_class_simple_method
2056 || class == scm_class_accessor
)
2058 SCM_SET_SLOT (z
, scm_si_generic_function
,
2059 scm_i_get_keyword (k_gf
,
2064 SCM_SET_SLOT (z
, scm_si_specializers
,
2065 scm_i_get_keyword (k_specializers
,
2070 SCM_SET_SLOT (z
, scm_si_procedure
,
2071 scm_i_get_keyword (k_procedure
,
2076 SCM_SET_SLOT (z
, scm_si_code_table
, SCM_EOL
);
2080 /* In all the others case, make a new class .... No instance here */
2081 SCM_SET_SLOT (z
, scm_si_name
,
2082 scm_i_get_keyword (k_name
,
2085 scm_str2symbol ("???"),
2087 SCM_SET_SLOT (z
, scm_si_direct_supers
,
2088 scm_i_get_keyword (k_dsupers
,
2093 SCM_SET_SLOT (z
, scm_si_direct_slots
,
2094 scm_i_get_keyword (k_slots
,
2105 SCM_DEFINE (scm_find_method
, "find-method", 0, 0, 1,
2108 #define FUNC_NAME s_scm_find_method
2111 long len
= scm_ilength (l
);
2114 SCM_WRONG_NUM_ARGS ();
2116 gf
= SCM_CAR(l
); l
= SCM_CDR(l
);
2117 SCM_VALIDATE_GENERIC (1, gf
);
2118 if (SCM_NULLP (SCM_SLOT (gf
, scm_si_methods
)))
2119 SCM_MISC_ERROR ("no methods for generic ~S", scm_list_1 (gf
));
2121 return scm_compute_applicable_methods (gf
, l
, len
- 1, 1);
2125 SCM_DEFINE (scm_sys_method_more_specific_p
, "%method-more-specific?", 3, 0, 0,
2126 (SCM m1
, SCM m2
, SCM targs
),
2128 #define FUNC_NAME s_scm_sys_method_more_specific_p
2133 SCM_VALIDATE_METHOD (1, m1
);
2134 SCM_VALIDATE_METHOD (2, m2
);
2135 SCM_ASSERT ((len
= scm_ilength (targs
)) != -1, targs
, SCM_ARG3
, FUNC_NAME
);
2137 /* Verify that all the arguments of targs are classes and place them in a vector*/
2138 v
= scm_c_make_vector (len
, SCM_EOL
);
2140 for (i
= 0, l
= targs
; !SCM_NULLP (l
); i
++, l
= SCM_CDR (l
)) {
2141 SCM_ASSERT (SCM_CLASSP (SCM_CAR (l
)), targs
, SCM_ARG3
, FUNC_NAME
);
2142 SCM_VELTS(v
)[i
] = SCM_CAR(l
);
2144 return more_specificp (m1
, m2
, SCM_VELTS(v
)) ? SCM_BOOL_T
: SCM_BOOL_F
;
2150 /******************************************************************************
2154 ******************************************************************************/
2158 make_stdcls (SCM
*var
, char *name
, SCM meta
, SCM super
, SCM slots
)
2160 SCM tmp
= scm_str2symbol (name
);
2162 *var
= scm_permanent_object (scm_basic_make_class (meta
,
2166 : scm_list_1 (super
),
2172 SCM_KEYWORD (k_slot_definition
, "slot-definition");
2175 create_standard_classes (void)
2178 SCM method_slots
= scm_list_4 (scm_str2symbol ("generic-function"),
2179 scm_str2symbol ("specializers"),
2181 scm_str2symbol ("code-table"));
2182 SCM amethod_slots
= scm_list_1 (scm_list_3 (scm_str2symbol ("slot-definition"),
2184 k_slot_definition
));
2186 SCM mutex_slot
= scm_list_1 (scm_str2symbol ("make-mutex"));
2188 SCM mutex_slot
= SCM_BOOL_F
;
2190 SCM gf_slots
= scm_list_4 (scm_str2symbol ("methods"),
2191 scm_list_3 (scm_str2symbol ("n-specialized"),
2194 scm_list_3 (scm_str2symbol ("used-by"),
2197 scm_list_3 (scm_str2symbol ("cache-mutex"),
2199 scm_closure (scm_list_2 (SCM_EOL
,
2203 /* Foreign class slot classes */
2204 make_stdcls (&scm_class_foreign_slot
, "<foreign-slot>",
2205 scm_class_class
, scm_class_top
, SCM_EOL
);
2206 make_stdcls (&scm_class_protected
, "<protected-slot>",
2207 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2208 make_stdcls (&scm_class_opaque
, "<opaque-slot>",
2209 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2210 make_stdcls (&scm_class_read_only
, "<read-only-slot>",
2211 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2212 make_stdcls (&scm_class_self
, "<self-slot>",
2214 scm_list_2 (scm_class_foreign_slot
, scm_class_read_only
),
2216 make_stdcls (&scm_class_protected_opaque
, "<protected-opaque-slot>",
2218 scm_list_2 (scm_class_protected
, scm_class_opaque
),
2220 make_stdcls (&scm_class_protected_read_only
, "<protected-read-only-slot>",
2222 scm_list_2 (scm_class_protected
, scm_class_read_only
),
2224 make_stdcls (&scm_class_scm
, "<scm-slot>",
2225 scm_class_class
, scm_class_protected
, SCM_EOL
);
2226 make_stdcls (&scm_class_int
, "<int-slot>",
2227 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2228 make_stdcls (&scm_class_float
, "<float-slot>",
2229 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2230 make_stdcls (&scm_class_double
, "<double-slot>",
2231 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2233 /* Continue initialization of class <class> */
2235 slots
= build_class_class_slots ();
2236 SCM_SET_SLOT (scm_class_class
, scm_si_direct_slots
, slots
);
2237 SCM_SET_SLOT (scm_class_class
, scm_si_slots
, slots
);
2238 SCM_SET_SLOT (scm_class_class
, scm_si_getters_n_setters
,
2239 compute_getters_n_setters (slots
));
2241 make_stdcls (&scm_class_foreign_class
, "<foreign-class>",
2242 scm_class_class
, scm_class_class
,
2243 scm_list_2 (scm_list_3 (scm_str2symbol ("constructor"),
2246 scm_list_3 (scm_str2symbol ("destructor"),
2248 scm_class_opaque
)));
2249 make_stdcls (&scm_class_foreign_object
, "<foreign-object>",
2250 scm_class_foreign_class
, scm_class_object
, SCM_EOL
);
2251 SCM_SET_CLASS_FLAGS (scm_class_foreign_object
, SCM_CLASSF_FOREIGN
);
2253 /* scm_class_generic functions classes */
2254 make_stdcls (&scm_class_procedure_class
, "<procedure-class>",
2255 scm_class_class
, scm_class_class
, SCM_EOL
);
2256 make_stdcls (&scm_class_entity_class
, "<entity-class>",
2257 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2258 make_stdcls (&scm_class_operator_class
, "<operator-class>",
2259 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2260 make_stdcls (&scm_class_operator_with_setter_class
,
2261 "<operator-with-setter-class>",
2262 scm_class_class
, scm_class_operator_class
, SCM_EOL
);
2263 make_stdcls (&scm_class_method
, "<method>",
2264 scm_class_class
, scm_class_object
, method_slots
);
2265 make_stdcls (&scm_class_simple_method
, "<simple-method>",
2266 scm_class_class
, scm_class_method
, SCM_EOL
);
2267 SCM_SET_CLASS_FLAGS (scm_class_simple_method
, SCM_CLASSF_SIMPLE_METHOD
);
2268 make_stdcls (&scm_class_accessor
, "<accessor-method>",
2269 scm_class_class
, scm_class_simple_method
, amethod_slots
);
2270 SCM_SET_CLASS_FLAGS (scm_class_accessor
, SCM_CLASSF_ACCESSOR_METHOD
);
2271 make_stdcls (&scm_class_entity
, "<entity>",
2272 scm_class_entity_class
, scm_class_object
, SCM_EOL
);
2273 make_stdcls (&scm_class_entity_with_setter
, "<entity-with-setter>",
2274 scm_class_entity_class
, scm_class_entity
, SCM_EOL
);
2275 make_stdcls (&scm_class_generic
, "<generic>",
2276 scm_class_entity_class
, scm_class_entity
, gf_slots
);
2277 SCM_SET_CLASS_FLAGS (scm_class_generic
, SCM_CLASSF_PURE_GENERIC
);
2278 make_stdcls (&scm_class_generic_with_setter
, "<generic-with-setter>",
2279 scm_class_entity_class
,
2280 scm_list_2 (scm_class_generic
, scm_class_entity_with_setter
),
2283 /* Patch cpl since compute_cpl doesn't support multiple inheritance. */
2284 SCM_SET_SLOT (scm_class_generic_with_setter
, scm_si_cpl
,
2285 scm_append (scm_list_3 (scm_list_2 (scm_class_generic_with_setter
,
2287 SCM_SLOT (scm_class_entity_with_setter
,
2291 SCM_SET_CLASS_FLAGS (scm_class_generic_with_setter
, SCM_CLASSF_PURE_GENERIC
);
2293 /* Primitive types classes */
2294 make_stdcls (&scm_class_boolean
, "<boolean>",
2295 scm_class_class
, scm_class_top
, SCM_EOL
);
2296 make_stdcls (&scm_class_char
, "<char>",
2297 scm_class_class
, scm_class_top
, SCM_EOL
);
2298 make_stdcls (&scm_class_list
, "<list>",
2299 scm_class_class
, scm_class_top
, SCM_EOL
);
2300 make_stdcls (&scm_class_pair
, "<pair>",
2301 scm_class_class
, scm_class_list
, SCM_EOL
);
2302 make_stdcls (&scm_class_null
, "<null>",
2303 scm_class_class
, scm_class_list
, SCM_EOL
);
2304 make_stdcls (&scm_class_string
, "<string>",
2305 scm_class_class
, scm_class_top
, SCM_EOL
);
2306 make_stdcls (&scm_class_symbol
, "<symbol>",
2307 scm_class_class
, scm_class_top
, SCM_EOL
);
2308 make_stdcls (&scm_class_vector
, "<vector>",
2309 scm_class_class
, scm_class_top
, SCM_EOL
);
2310 make_stdcls (&scm_class_number
, "<number>",
2311 scm_class_class
, scm_class_top
, SCM_EOL
);
2312 make_stdcls (&scm_class_complex
, "<complex>",
2313 scm_class_class
, scm_class_number
, SCM_EOL
);
2314 make_stdcls (&scm_class_real
, "<real>",
2315 scm_class_class
, scm_class_complex
, SCM_EOL
);
2316 make_stdcls (&scm_class_integer
, "<integer>",
2317 scm_class_class
, scm_class_real
, SCM_EOL
);
2318 make_stdcls (&scm_class_keyword
, "<keyword>",
2319 scm_class_class
, scm_class_top
, SCM_EOL
);
2320 make_stdcls (&scm_class_unknown
, "<unknown>",
2321 scm_class_class
, scm_class_top
, SCM_EOL
);
2322 make_stdcls (&scm_class_procedure
, "<procedure>",
2323 scm_class_procedure_class
, scm_class_top
, SCM_EOL
);
2324 make_stdcls (&scm_class_procedure_with_setter
, "<procedure-with-setter>",
2325 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2326 make_stdcls (&scm_class_primitive_generic
, "<primitive-generic>",
2327 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2328 make_stdcls (&scm_class_port
, "<port>",
2329 scm_class_class
, scm_class_top
, SCM_EOL
);
2330 make_stdcls (&scm_class_input_port
, "<input-port>",
2331 scm_class_class
, scm_class_port
, SCM_EOL
);
2332 make_stdcls (&scm_class_output_port
, "<output-port>",
2333 scm_class_class
, scm_class_port
, SCM_EOL
);
2334 make_stdcls (&scm_class_input_output_port
, "<input-output-port>",
2336 scm_list_2 (scm_class_input_port
, scm_class_output_port
),
2340 /**********************************************************************
2344 **********************************************************************/
2347 make_class_from_template (char *template, char *type_name
, SCM supers
)
2353 sprintf (buffer
, template, type_name
);
2354 name
= scm_str2symbol (buffer
);
2357 name
= SCM_GOOPS_UNBOUND
;
2359 class = scm_permanent_object (scm_basic_make_class (scm_class_class
,
2364 /* Only define name if doesn't already exist. */
2365 if (!SCM_GOOPS_UNBOUNDP (name
)
2366 && SCM_FALSEP (scm_call_2 (scm_goops_lookup_closure
, name
, SCM_BOOL_F
)))
2367 DEFVAR (name
, class);
2372 scm_make_extended_class (char *type_name
)
2374 return make_class_from_template ("<%s>",
2376 scm_list_1 (scm_class_top
));
2380 create_smob_classes (void)
2384 scm_smob_class
= (SCM
*) malloc (255 * sizeof (SCM
));
2385 for (i
= 0; i
< 255; ++i
)
2386 scm_smob_class
[i
] = 0;
2388 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_big
)] = scm_class_integer
;
2389 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_real
)] = scm_class_real
;
2390 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_complex
)] = scm_class_complex
;
2391 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_keyword
)] = scm_class_keyword
;
2393 for (i
= 0; i
< scm_numsmob
; ++i
)
2394 if (!scm_smob_class
[i
])
2395 scm_smob_class
[i
] = scm_make_extended_class (SCM_SMOBNAME (i
));
2399 scm_make_port_classes (long ptobnum
, char *type_name
)
2401 SCM c
, class = make_class_from_template ("<%s-port>",
2403 scm_list_1 (scm_class_port
));
2404 scm_port_class
[SCM_IN_PCLASS_INDEX
+ ptobnum
]
2405 = make_class_from_template ("<%s-input-port>",
2407 scm_list_2 (class, scm_class_input_port
));
2408 scm_port_class
[SCM_OUT_PCLASS_INDEX
+ ptobnum
]
2409 = make_class_from_template ("<%s-output-port>",
2411 scm_list_2 (class, scm_class_output_port
));
2412 scm_port_class
[SCM_INOUT_PCLASS_INDEX
+ ptobnum
]
2414 = make_class_from_template ("<%s-input-output-port>",
2416 scm_list_2 (class, scm_class_input_output_port
));
2417 /* Patch cpl (since this tree is too complex for the C level compute-cpl) */
2418 SCM_SET_SLOT (c
, scm_si_cpl
,
2419 scm_cons2 (c
, class, SCM_SLOT (scm_class_input_output_port
, scm_si_cpl
)));
2423 create_port_classes (void)
2427 scm_port_class
= (SCM
*) malloc (3 * 256 * sizeof (SCM
));
2428 for (i
= 0; i
< 3 * 256; ++i
)
2429 scm_port_class
[i
] = 0;
2431 for (i
= 0; i
< scm_numptob
; ++i
)
2432 scm_make_port_classes (i
, SCM_PTOBNAME (i
));
2436 make_struct_class (void *closure SCM_UNUSED
, SCM key SCM_UNUSED
,
2437 SCM data
, SCM prev SCM_UNUSED
)
2439 if (!SCM_FALSEP (SCM_STRUCT_TABLE_NAME (data
)))
2440 SCM_SET_STRUCT_TABLE_CLASS (data
,
2441 scm_make_extended_class
2442 (SCM_SYMBOL_CHARS (SCM_STRUCT_TABLE_NAME (data
))));
2443 return SCM_UNSPECIFIED
;
2447 create_struct_classes (void)
2449 scm_internal_hash_fold (make_struct_class
, 0, SCM_BOOL_F
, scm_struct_table
);
2452 /**********************************************************************
2456 **********************************************************************/
2461 if (!goops_loaded_p
)
2462 scm_c_resolve_module ("oop goops");
2467 scm_make_foreign_object (SCM
class, SCM initargs
)
2468 #define FUNC_NAME s_scm_make
2470 void * (*constructor
) (SCM
)
2471 = (void * (*) (SCM
)) SCM_SLOT (class, scm_si_constructor
);
2472 if (constructor
== 0)
2473 SCM_MISC_ERROR ("Can't make instances of class ~S", scm_list_1 (class));
2474 return scm_wrap_object (class, constructor (initargs
));
2480 scm_free_foreign_object (SCM
*class, SCM
*data
)
2482 size_t (*destructor
) (void *)
2483 = (size_t (*) (void *)) class[scm_si_destructor
];
2484 return destructor (data
);
2488 scm_make_class (SCM meta
, char *s_name
, SCM supers
, size_t size
,
2489 void * (*constructor
) (SCM initargs
),
2490 size_t (*destructor
) (void *))
2493 name
= scm_str2symbol (s_name
);
2494 if (SCM_NULLP (supers
))
2495 supers
= scm_list_1 (scm_class_foreign_object
);
2496 class = scm_basic_basic_make_class (meta
, name
, supers
, SCM_EOL
);
2497 scm_sys_inherit_magic_x (class, supers
);
2499 if (destructor
!= 0)
2501 SCM_SET_SLOT (class, scm_si_destructor
, (SCM
) destructor
);
2502 SCM_SET_CLASS_DESTRUCTOR (class, scm_free_foreign_object
);
2506 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
2507 SCM_SET_CLASS_INSTANCE_SIZE (class, size
);
2510 SCM_SET_SLOT (class, scm_si_layout
, scm_str2symbol (""));
2511 SCM_SET_SLOT (class, scm_si_constructor
, (SCM
) constructor
);
2516 SCM_SYMBOL (sym_o
, "o");
2517 SCM_SYMBOL (sym_x
, "x");
2519 SCM_KEYWORD (k_accessor
, "accessor");
2520 SCM_KEYWORD (k_getter
, "getter");
2523 default_setter (SCM obj SCM_UNUSED
, SCM c SCM_UNUSED
)
2525 scm_misc_error ("slot-set!", "read-only slot", SCM_EOL
);
2530 scm_add_slot (SCM
class, char *slot_name
, SCM slot_class
,
2531 SCM (*getter
) (SCM obj
),
2532 SCM (*setter
) (SCM obj
, SCM x
),
2533 char *accessor_name
)
2536 SCM get
= scm_c_make_subr ("goops:get", scm_tc7_subr_1
, getter
);
2537 SCM set
= scm_c_make_subr ("goops:set", scm_tc7_subr_2
,
2538 setter
? setter
: default_setter
);
2539 SCM getm
= scm_closure (scm_list_2 (scm_list_1 (sym_o
),
2540 scm_list_2 (get
, sym_o
)),
2542 SCM setm
= scm_closure (scm_list_2 (scm_list_2 (sym_o
, sym_x
),
2543 scm_list_3 (set
, sym_o
, sym_x
)),
2546 SCM name
= scm_str2symbol (slot_name
);
2547 SCM aname
= scm_str2symbol (accessor_name
);
2548 SCM gf
= scm_ensure_accessor (aname
);
2549 SCM slot
= scm_list_5 (name
,
2552 setter
? k_accessor
: k_getter
,
2554 SCM gns
= scm_list_4 (name
, SCM_BOOL_F
, get
, set
);
2556 scm_add_method (gf
, scm_make (scm_list_5 (scm_class_accessor
,
2561 scm_add_method (scm_setter (gf
),
2562 scm_make (scm_list_5 (scm_class_accessor
,
2564 scm_list_2 (class, scm_class_top
),
2569 SCM_SET_SLOT (class, scm_si_slots
,
2570 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_slots
),
2571 scm_list_1 (slot
))));
2572 SCM_SET_SLOT (class, scm_si_getters_n_setters
,
2573 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_getters_n_setters
),
2574 scm_list_1 (gns
))));
2578 long n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
2580 SCM_SET_SLOT (class, scm_si_nfields
, SCM_MAKINUM (n
+ 1));
2585 scm_wrap_object (SCM
class, void *data
)
2587 return scm_alloc_double_cell (SCM_UNPACK (SCM_CDR (class)) | scm_tc3_struct
,
2595 scm_wrap_component (SCM
class, SCM container
, void *data
)
2597 SCM obj
= scm_wrap_object (class, data
);
2598 SCM handle
= scm_hash_fn_create_handle_x (scm_components
,
2604 SCM_SETCDR (handle
, container
);
2609 scm_ensure_accessor (SCM name
)
2611 SCM gf
= scm_call_2 (SCM_TOP_LEVEL_LOOKUP_CLOSURE
, name
, SCM_BOOL_F
);
2612 if (!SCM_IS_A_P (gf
, scm_class_generic_with_setter
))
2614 gf
= scm_make (scm_list_3 (scm_class_generic
, k_name
, name
));
2615 gf
= scm_make (scm_list_5 (scm_class_generic_with_setter
,
2616 k_name
, name
, k_setter
, gf
));
2621 SCM_SYMBOL (sym_internal_add_method_x
, "internal-add-method!");
2624 scm_add_method (SCM gf
, SCM m
)
2626 scm_eval (scm_list_3 (sym_internal_add_method_x
, gf
, m
), scm_module_goops
);
2631 * Debugging utilities
2634 SCM_DEFINE (scm_pure_generic_p
, "pure-generic?", 1, 0, 0,
2636 "Return @code{#t} if @var{obj} is a pure generic.")
2637 #define FUNC_NAME s_scm_pure_generic_p
2639 return SCM_BOOL (SCM_PUREGENERICP (obj
));
2643 #endif /* GUILE_DEBUG */
2649 SCM_DEFINE (scm_sys_goops_loaded
, "%goops-loaded", 0, 0, 0,
2651 "Announce that GOOPS is loaded and perform initialization\n"
2652 "on the C level which depends on the loaded GOOPS modules.")
2653 #define FUNC_NAME s_scm_sys_goops_loaded
2656 var_compute_applicable_methods
=
2657 scm_sym2var (sym_compute_applicable_methods
, scm_goops_lookup_closure
,
2659 return SCM_UNSPECIFIED
;
2663 SCM scm_module_goops
;
2666 scm_init_goops_builtins (void)
2668 scm_module_goops
= scm_current_module ();
2669 scm_goops_lookup_closure
= scm_module_lookup_closure (scm_module_goops
);
2671 /* Not really necessary right now, but who knows...
2673 scm_permanent_object (scm_module_goops
);
2674 scm_permanent_object (scm_goops_lookup_closure
);
2676 scm_components
= scm_permanent_object (scm_make_weak_key_hash_table
2677 (SCM_MAKINUM (37)));
2679 goops_rstate
= scm_c_make_rstate ("GOOPS", 5);
2681 #ifndef SCM_MAGIC_SNARFER
2682 #include "libguile/goops.x"
2685 list_of_no_method
= scm_permanent_object (scm_list_1 (sym_no_method
));
2687 hell
= scm_must_malloc (hell_size
, "hell");
2689 scm_mutex_init (&hell_mutex
);
2692 create_basic_classes ();
2693 create_standard_classes ();
2694 create_smob_classes ();
2695 create_struct_classes ();
2696 create_port_classes ();
2699 SCM name
= scm_str2symbol ("no-applicable-method");
2700 scm_no_applicable_method
2701 = scm_permanent_object (scm_make (scm_list_3 (scm_class_generic
,
2704 DEFVAR (name
, scm_no_applicable_method
);
2707 return SCM_UNSPECIFIED
;
2713 scm_c_define_gsubr ("%init-goops-builtins", 0, 0, 0,
2714 scm_init_goops_builtins
);