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_CLOSURE_BODY (tmp
), env
));
475 SCM_KEYWORD (k_class
, "class");
477 SCM_DEFINE (scm_sys_prep_layout_x
, "%prep-layout!", 1, 0, 0,
480 #define FUNC_NAME s_scm_sys_prep_layout_x
483 unsigned long int n
, i
;
486 SCM_VALIDATE_INSTANCE (1, class);
487 slots
= SCM_SLOT (class, scm_si_slots
);
488 nfields
= SCM_SLOT (class, scm_si_nfields
);
489 if (!SCM_INUMP (nfields
) || SCM_INUM (nfields
) < 0)
490 SCM_MISC_ERROR ("bad value in nfields slot: ~S",
491 scm_list_1 (nfields
));
492 n
= 2 * SCM_INUM (nfields
);
493 if (n
< sizeof (SCM_CLASS_CLASS_LAYOUT
) - 1
494 && SCM_SUBCLASSP (class, scm_class_class
))
495 SCM_MISC_ERROR ("class object doesn't have enough fields: ~S",
496 scm_list_1 (nfields
));
498 s
= n
> 0 ? scm_must_malloc (n
, FUNC_NAME
) : 0;
499 for (i
= 0; i
< n
; i
+= 2)
505 if (!SCM_CONSP (slots
))
506 SCM_MISC_ERROR ("too few slot definitions", SCM_EOL
);
507 len
= scm_ilength (SCM_CDAR (slots
));
508 type
= scm_i_get_keyword (k_class
, SCM_CDAR (slots
), len
, SCM_BOOL_F
,
510 if (SCM_FALSEP (type
))
517 if (!SCM_CLASSP (type
))
518 SCM_MISC_ERROR ("bad slot class", SCM_EOL
);
519 else if (SCM_SUBCLASSP (type
, scm_class_foreign_slot
))
521 if (SCM_SUBCLASSP (type
, scm_class_self
))
523 else if (SCM_SUBCLASSP (type
, scm_class_protected
))
528 if (SCM_SUBCLASSP (type
, scm_class_opaque
))
530 else if (SCM_SUBCLASSP (type
, scm_class_read_only
))
543 slots
= SCM_CDR (slots
);
545 SCM_SET_SLOT (class, scm_si_layout
, scm_mem2symbol (s
, n
));
548 return SCM_UNSPECIFIED
;
552 static void prep_hashsets (SCM
);
554 SCM_DEFINE (scm_sys_inherit_magic_x
, "%inherit-magic!", 2, 0, 0,
555 (SCM
class, SCM dsupers
),
557 #define FUNC_NAME s_scm_sys_inherit_magic_x
561 SCM_VALIDATE_INSTANCE (1, class);
562 while (!SCM_NULLP (ls
))
564 SCM_ASSERT (SCM_CONSP (ls
)
565 && SCM_INSTANCEP (SCM_CAR (ls
)),
569 flags
|= SCM_CLASS_FLAGS (SCM_CAR (ls
));
572 flags
&= SCM_CLASSF_INHERIT
;
573 if (flags
& SCM_CLASSF_ENTITY
)
574 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_entity
);
577 long n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
580 * We could avoid calling scm_must_malloc in the allocation code
581 * (in which case the following two lines are needed). Instead
582 * we make 0-slot instances non-light, so that the light case
583 * can be handled without special cases.
586 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_0
);
588 if (n
> 0 && !(flags
& SCM_CLASSF_METACLASS
))
590 /* NOTE: The following depends on scm_struct_i_size. */
591 flags
|= SCM_STRUCTF_LIGHT
+ n
* sizeof (SCM
); /* use light representation */
592 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
595 SCM_SET_CLASS_FLAGS (class, flags
);
597 prep_hashsets (class);
599 return SCM_UNSPECIFIED
;
604 prep_hashsets (SCM
class)
608 for (i
= 0; i
< 7; ++i
)
609 SCM_SET_HASHSET (class, i
, scm_c_uniform32 (goops_rstate
));
612 /******************************************************************************/
615 scm_basic_basic_make_class (SCM
class, SCM name
, SCM dsupers
, SCM dslots
)
617 SCM z
, cpl
, slots
, nfields
, g_n_s
;
619 /* Allocate one instance */
620 z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
622 /* Initialize its slots */
624 cpl
= compute_cpl (dsupers
, scm_list_1 (z
));
626 SCM_SET_SLOT (z
, scm_si_direct_supers
, dsupers
);
627 cpl
= compute_cpl (z
);
628 slots
= build_slots_list (maplist (dslots
), cpl
);
629 nfields
= SCM_MAKINUM (scm_ilength (slots
));
630 g_n_s
= compute_getters_n_setters (slots
);
632 SCM_SET_SLOT (z
, scm_si_name
, name
);
633 SCM_SET_SLOT (z
, scm_si_direct_slots
, dslots
);
634 SCM_SET_SLOT (z
, scm_si_direct_subclasses
, SCM_EOL
);
635 SCM_SET_SLOT (z
, scm_si_direct_methods
, SCM_EOL
);
636 SCM_SET_SLOT (z
, scm_si_cpl
, cpl
);
637 SCM_SET_SLOT (z
, scm_si_slots
, slots
);
638 SCM_SET_SLOT (z
, scm_si_nfields
, nfields
);
639 SCM_SET_SLOT (z
, scm_si_getters_n_setters
, g_n_s
);
640 SCM_SET_SLOT (z
, scm_si_redefined
, SCM_BOOL_F
);
641 SCM_SET_SLOT (z
, scm_si_environment
,
642 scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE
));
644 /* Add this class in the direct-subclasses slot of dsupers */
647 for (tmp
= dsupers
; !SCM_NULLP (tmp
); tmp
= SCM_CDR (tmp
))
648 SCM_SET_SLOT (SCM_CAR (tmp
), scm_si_direct_subclasses
,
649 scm_cons (z
, SCM_SLOT (SCM_CAR (tmp
),
650 scm_si_direct_subclasses
)));
653 /* Support for the underlying structs: */
654 SCM_SET_CLASS_FLAGS (z
, (class == scm_class_entity_class
655 ? (SCM_CLASSF_GOOPS_OR_VALID
656 | SCM_CLASSF_OPERATOR
658 : class == scm_class_operator_class
659 ? SCM_CLASSF_GOOPS_OR_VALID
| SCM_CLASSF_OPERATOR
660 : SCM_CLASSF_GOOPS_OR_VALID
));
665 scm_basic_make_class (SCM
class, SCM name
, SCM dsupers
, SCM dslots
)
667 SCM z
= scm_basic_basic_make_class (class, name
, dsupers
, dslots
);
668 scm_sys_inherit_magic_x (z
, dsupers
);
669 scm_sys_prep_layout_x (z
);
673 /******************************************************************************/
675 SCM_SYMBOL (sym_layout
, "layout");
676 SCM_SYMBOL (sym_vcell
, "vcell");
677 SCM_SYMBOL (sym_vtable
, "vtable");
678 SCM_SYMBOL (sym_print
, "print");
679 SCM_SYMBOL (sym_procedure
, "procedure");
680 SCM_SYMBOL (sym_setter
, "setter");
681 SCM_SYMBOL (sym_redefined
, "redefined");
682 SCM_SYMBOL (sym_h0
, "h0");
683 SCM_SYMBOL (sym_h1
, "h1");
684 SCM_SYMBOL (sym_h2
, "h2");
685 SCM_SYMBOL (sym_h3
, "h3");
686 SCM_SYMBOL (sym_h4
, "h4");
687 SCM_SYMBOL (sym_h5
, "h5");
688 SCM_SYMBOL (sym_h6
, "h6");
689 SCM_SYMBOL (sym_h7
, "h7");
690 SCM_SYMBOL (sym_name
, "name");
691 SCM_SYMBOL (sym_direct_supers
, "direct-supers");
692 SCM_SYMBOL (sym_direct_slots
, "direct-slots");
693 SCM_SYMBOL (sym_direct_subclasses
, "direct-subclasses");
694 SCM_SYMBOL (sym_direct_methods
, "direct-methods");
695 SCM_SYMBOL (sym_cpl
, "cpl");
696 SCM_SYMBOL (sym_default_slot_definition_class
, "default-slot-definition-class");
697 SCM_SYMBOL (sym_slots
, "slots");
698 SCM_SYMBOL (sym_getters_n_setters
, "getters-n-setters");
699 SCM_SYMBOL (sym_keyword_access
, "keyword-access");
700 SCM_SYMBOL (sym_nfields
, "nfields");
701 SCM_SYMBOL (sym_environment
, "environment");
705 build_class_class_slots ()
708 scm_list_3 (sym_layout
, k_class
, scm_class_protected_read_only
),
709 scm_list_3 (sym_vtable
, k_class
, scm_class_self
),
710 scm_list_1 (sym_print
),
711 scm_list_3 (sym_procedure
, k_class
, scm_class_protected_opaque
),
712 scm_list_3 (sym_setter
, k_class
, scm_class_protected_opaque
),
713 scm_list_1 (sym_redefined
),
714 scm_list_3 (sym_h0
, k_class
, scm_class_int
),
715 scm_list_3 (sym_h1
, k_class
, scm_class_int
),
716 scm_list_3 (sym_h2
, k_class
, scm_class_int
),
717 scm_list_3 (sym_h3
, k_class
, scm_class_int
),
718 scm_list_3 (sym_h4
, k_class
, scm_class_int
),
719 scm_list_3 (sym_h5
, k_class
, scm_class_int
),
720 scm_list_3 (sym_h6
, k_class
, scm_class_int
),
721 scm_list_3 (sym_h7
, k_class
, scm_class_int
),
722 scm_list_1 (sym_name
),
723 scm_list_1 (sym_direct_supers
),
724 scm_list_1 (sym_direct_slots
),
725 scm_list_1 (sym_direct_subclasses
),
726 scm_list_1 (sym_direct_methods
),
727 scm_list_1 (sym_cpl
),
728 scm_list_1 (sym_default_slot_definition_class
),
729 scm_list_1 (sym_slots
),
730 scm_list_1 (sym_getters_n_setters
),
731 scm_list_1 (sym_keyword_access
),
732 scm_list_1 (sym_nfields
),
733 scm_list_1 (sym_environment
),
738 create_basic_classes (void)
740 /* SCM slots_of_class = build_class_class_slots (); */
742 /**** <scm_class_class> ****/
743 SCM cs
= scm_makfrom0str (SCM_CLASS_CLASS_LAYOUT
744 + 2 * scm_vtable_offset_user
);
745 SCM name
= scm_str2symbol ("<class>");
746 scm_class_class
= scm_permanent_object (scm_make_vtable_vtable (cs
,
749 SCM_SET_CLASS_FLAGS (scm_class_class
, (SCM_CLASSF_GOOPS_OR_VALID
750 | SCM_CLASSF_METACLASS
));
752 SCM_SET_SLOT (scm_class_class
, scm_si_name
, name
);
753 SCM_SET_SLOT (scm_class_class
, scm_si_direct_supers
, SCM_EOL
); /* will be changed */
754 /* SCM_SET_SLOT (scm_class_class, scm_si_direct_slots, slots_of_class); */
755 SCM_SET_SLOT (scm_class_class
, scm_si_direct_subclasses
, SCM_EOL
);
756 SCM_SET_SLOT (scm_class_class
, scm_si_direct_methods
, SCM_EOL
);
757 SCM_SET_SLOT (scm_class_class
, scm_si_cpl
, SCM_EOL
); /* will be changed */
758 /* SCM_SET_SLOT (scm_class_class, scm_si_slots, slots_of_class); */
759 SCM_SET_SLOT (scm_class_class
, scm_si_nfields
, SCM_MAKINUM (SCM_N_CLASS_SLOTS
));
760 /* SCM_SET_SLOT (scm_class_class, scm_si_getters_n_setters,
761 compute_getters_n_setters (slots_of_class)); */
762 SCM_SET_SLOT (scm_class_class
, scm_si_redefined
, SCM_BOOL_F
);
763 SCM_SET_SLOT (scm_class_class
, scm_si_environment
,
764 scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE
));
766 prep_hashsets (scm_class_class
);
768 DEFVAR(name
, scm_class_class
);
770 /**** <scm_class_top> ****/
771 name
= scm_str2symbol ("<top>");
772 scm_class_top
= scm_permanent_object (scm_basic_make_class (scm_class_class
,
777 DEFVAR(name
, scm_class_top
);
779 /**** <scm_class_object> ****/
780 name
= scm_str2symbol ("<object>");
781 scm_class_object
= scm_permanent_object (scm_basic_make_class (scm_class_class
,
783 scm_list_1 (scm_class_top
),
786 DEFVAR (name
, scm_class_object
);
788 /* <top> <object> and <class> were partially initialized. Correct them here */
789 SCM_SET_SLOT (scm_class_object
, scm_si_direct_subclasses
, scm_list_1 (scm_class_class
));
791 SCM_SET_SLOT (scm_class_class
, scm_si_direct_supers
, scm_list_1 (scm_class_object
));
792 SCM_SET_SLOT (scm_class_class
, scm_si_cpl
, scm_list_3 (scm_class_class
, scm_class_object
, scm_class_top
));
795 /******************************************************************************/
797 SCM_DEFINE (scm_instance_p
, "instance?", 1, 0, 0,
799 "Return @code{#t} if @var{obj} is an instance.")
800 #define FUNC_NAME s_scm_instance_p
802 return SCM_BOOL (SCM_INSTANCEP (obj
));
807 /******************************************************************************
809 * Meta object accessors
811 ******************************************************************************/
812 SCM_DEFINE (scm_class_name
, "class-name", 1, 0, 0,
814 "Return the class name of @var{obj}.")
815 #define FUNC_NAME s_scm_class_name
817 SCM_VALIDATE_CLASS (1, obj
);
818 return scm_slot_ref (obj
, sym_name
);
822 SCM_DEFINE (scm_class_direct_supers
, "class-direct-supers", 1, 0, 0,
824 "Return the direct superclasses of the class @var{obj}.")
825 #define FUNC_NAME s_scm_class_direct_supers
827 SCM_VALIDATE_CLASS (1, obj
);
828 return scm_slot_ref (obj
, sym_direct_supers
);
832 SCM_DEFINE (scm_class_direct_slots
, "class-direct-slots", 1, 0, 0,
834 "Return the direct slots of the class @var{obj}.")
835 #define FUNC_NAME s_scm_class_direct_slots
837 SCM_VALIDATE_CLASS (1, obj
);
838 return scm_slot_ref (obj
, sym_direct_slots
);
842 SCM_DEFINE (scm_class_direct_subclasses
, "class-direct-subclasses", 1, 0, 0,
844 "Return the direct subclasses of the class @var{obj}.")
845 #define FUNC_NAME s_scm_class_direct_subclasses
847 SCM_VALIDATE_CLASS (1, obj
);
848 return scm_slot_ref(obj
, sym_direct_subclasses
);
852 SCM_DEFINE (scm_class_direct_methods
, "class-direct-methods", 1, 0, 0,
854 "Return the direct methods of the class @var{obj}")
855 #define FUNC_NAME s_scm_class_direct_methods
857 SCM_VALIDATE_CLASS (1, obj
);
858 return scm_slot_ref (obj
, sym_direct_methods
);
862 SCM_DEFINE (scm_class_precedence_list
, "class-precedence-list", 1, 0, 0,
864 "Return the class precedence list of the class @var{obj}.")
865 #define FUNC_NAME s_scm_class_precedence_list
867 SCM_VALIDATE_CLASS (1, obj
);
868 return scm_slot_ref (obj
, sym_cpl
);
872 SCM_DEFINE (scm_class_slots
, "class-slots", 1, 0, 0,
874 "Return the slot list of the class @var{obj}.")
875 #define FUNC_NAME s_scm_class_slots
877 SCM_VALIDATE_CLASS (1, obj
);
878 return scm_slot_ref (obj
, sym_slots
);
882 SCM_DEFINE (scm_class_environment
, "class-environment", 1, 0, 0,
884 "Return the environment of the class @var{obj}.")
885 #define FUNC_NAME s_scm_class_environment
887 SCM_VALIDATE_CLASS (1, obj
);
888 return scm_slot_ref(obj
, sym_environment
);
893 SCM_DEFINE (scm_generic_function_name
, "generic-function-name", 1, 0, 0,
895 "Return the name of the generic function @var{obj}.")
896 #define FUNC_NAME s_scm_generic_function_name
898 SCM_VALIDATE_GENERIC (1, obj
);
899 return scm_procedure_property (obj
, scm_sym_name
);
903 SCM_DEFINE (scm_generic_function_methods
, "generic-function-methods", 1, 0, 0,
905 "Return the methods of the generic function @var{obj}.")
906 #define FUNC_NAME s_scm_generic_function_methods
908 SCM_VALIDATE_GENERIC (1, obj
);
909 return scm_slot_ref (obj
, scm_str2symbol ("methods"));
914 SCM_DEFINE (scm_method_generic_function
, "method-generic-function", 1, 0, 0,
916 "Return the generic function fot the method @var{obj}.")
917 #define FUNC_NAME s_scm_method_generic_function
919 SCM_VALIDATE_METHOD (1, obj
);
920 return scm_slot_ref (obj
, scm_str2symbol ("generic-function"));
924 SCM_DEFINE (scm_method_specializers
, "method-specializers", 1, 0, 0,
926 "Return specializers of the method @var{obj}.")
927 #define FUNC_NAME s_scm_method_specializers
929 SCM_VALIDATE_METHOD (1, obj
);
930 return scm_slot_ref (obj
, scm_str2symbol ("specializers"));
934 SCM_DEFINE (scm_method_procedure
, "method-procedure", 1, 0, 0,
936 "Return the procedure of the method @var{obj}.")
937 #define FUNC_NAME s_scm_method_procedure
939 SCM_VALIDATE_METHOD (1, obj
);
940 return scm_slot_ref (obj
, sym_procedure
);
944 SCM_DEFINE (scm_accessor_method_slot_definition
, "accessor-method-slot-definition", 1, 0, 0,
946 "Return the slot definition of the accessor @var{obj}.")
947 #define FUNC_NAME s_scm_accessor_method_slot_definition
949 SCM_VALIDATE_ACCESSOR (1, obj
);
950 return scm_slot_ref (obj
, scm_str2symbol ("slot-definition"));
954 SCM_DEFINE (scm_sys_tag_body
, "%tag-body", 1, 0, 0,
956 "Internal GOOPS magic---don't use this function!")
957 #define FUNC_NAME s_scm_sys_tag_body
959 return scm_cons (SCM_IM_LAMBDA
, body
);
963 /******************************************************************************
965 * S l o t a c c e s s
967 ******************************************************************************/
969 SCM_DEFINE (scm_make_unbound
, "make-unbound", 0, 0, 0,
971 "Return the unbound value.")
972 #define FUNC_NAME s_scm_make_unbound
974 return SCM_GOOPS_UNBOUND
;
978 SCM_DEFINE (scm_unbound_p
, "unbound?", 1, 0, 0,
980 "Return @code{#t} if @var{obj} is unbound.")
981 #define FUNC_NAME s_scm_unbound_p
983 return SCM_GOOPS_UNBOUNDP (obj
) ? SCM_BOOL_T
: SCM_BOOL_F
;
987 SCM_DEFINE (scm_assert_bound
, "assert-bound", 2, 0, 0,
988 (SCM value
, SCM obj
),
989 "Return @var{value} if it is bound, and invoke the\n"
990 "@var{slot-unbound} method of @var{obj} if it is not.")
991 #define FUNC_NAME s_scm_assert_bound
993 if (SCM_GOOPS_UNBOUNDP (value
))
994 return CALL_GF1 ("slot-unbound", obj
);
999 SCM_DEFINE (scm_at_assert_bound_ref
, "@assert-bound-ref", 2, 0, 0,
1000 (SCM obj
, SCM index
),
1001 "Like @code{assert-bound}, but use @var{index} for accessing\n"
1002 "the value from @var{obj}.")
1003 #define FUNC_NAME s_scm_at_assert_bound_ref
1005 SCM value
= SCM_SLOT (obj
, SCM_INUM (index
));
1006 if (SCM_GOOPS_UNBOUNDP (value
))
1007 return CALL_GF1 ("slot-unbound", obj
);
1012 SCM_DEFINE (scm_sys_fast_slot_ref
, "%fast-slot-ref", 2, 0, 0,
1013 (SCM obj
, SCM index
),
1014 "Return the slot value with index @var{index} from @var{obj}.")
1015 #define FUNC_NAME s_scm_sys_fast_slot_ref
1017 unsigned long int i
;
1019 SCM_VALIDATE_INSTANCE (1, obj
);
1020 SCM_VALIDATE_INUM (2, index
);
1021 SCM_ASSERT_RANGE (2, index
, SCM_INUM (index
) >= 0);
1022 i
= SCM_INUM (index
);
1023 SCM_ASSERT_RANGE (2, index
, i
< SCM_NUMBER_OF_SLOTS (obj
));
1025 return scm_at_assert_bound_ref (obj
, index
);
1029 SCM_DEFINE (scm_sys_fast_slot_set_x
, "%fast-slot-set!", 3, 0, 0,
1030 (SCM obj
, SCM index
, SCM value
),
1031 "Set the slot with index @var{index} in @var{obj} to\n"
1033 #define FUNC_NAME s_scm_sys_fast_slot_set_x
1035 unsigned long int i
;
1037 SCM_VALIDATE_INSTANCE (1, obj
);
1038 SCM_VALIDATE_INUM (2, index
);
1039 SCM_ASSERT_RANGE (2, index
, SCM_INUM (index
) >= 0);
1040 i
= SCM_INUM (index
);
1041 SCM_ASSERT_RANGE (2, index
, i
< SCM_NUMBER_OF_SLOTS (obj
));
1043 SCM_SET_SLOT (obj
, i
, value
);
1045 return SCM_UNSPECIFIED
;
1052 /* In the future, this function will return the effective slot
1053 * definition associated with SLOT_NAME. Now it just returns some of
1054 * the information which will be stored in the effective slot
1059 slot_definition_using_name (SCM
class, SCM slot_name
)
1061 register SCM slots
= SCM_SLOT (class, scm_si_getters_n_setters
);
1062 for (; !SCM_NULLP (slots
); slots
= SCM_CDR (slots
))
1063 if (SCM_CAAR (slots
) == slot_name
)
1064 return SCM_CAR (slots
);
1069 get_slot_value (SCM
class SCM_UNUSED
, SCM obj
, SCM slotdef
)
1071 SCM access
= SCM_CDDR (slotdef
);
1073 * - access is an integer (the offset of this slot in the slots vector)
1074 * - otherwise (car access) is the getter function to apply
1076 if (SCM_INUMP (access
))
1077 return SCM_SLOT (obj
, SCM_INUM (access
));
1080 /* We must evaluate (apply (car access) (list obj))
1081 * where (car access) is known to be a closure of arity 1 */
1082 register SCM code
, env
;
1084 code
= SCM_CAR (access
);
1085 if (!SCM_CLOSUREP (code
))
1086 return SCM_SUBRF (code
) (obj
);
1087 env
= SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (code
),
1090 /* Evaluate the closure body */
1091 return scm_eval_body (SCM_CLOSURE_BODY (code
), env
);
1096 get_slot_value_using_name (SCM
class, SCM obj
, SCM slot_name
)
1098 SCM slotdef
= slot_definition_using_name (class, slot_name
);
1099 if (!SCM_FALSEP (slotdef
))
1100 return get_slot_value (class, obj
, slotdef
);
1102 return CALL_GF3 ("slot-missing", class, obj
, slot_name
);
1106 set_slot_value (SCM
class SCM_UNUSED
, SCM obj
, SCM slotdef
, SCM value
)
1108 SCM access
= SCM_CDDR (slotdef
);
1110 * - access is an integer (the offset of this slot in the slots vector)
1111 * - otherwise (cadr access) is the setter function to apply
1113 if (SCM_INUMP (access
))
1114 SCM_SET_SLOT (obj
, SCM_INUM (access
), value
);
1117 /* We must evaluate (apply (cadr l) (list obj value))
1118 * where (cadr l) is known to be a closure of arity 2 */
1119 register SCM code
, env
;
1121 code
= SCM_CADR (access
);
1122 if (!SCM_CLOSUREP (code
))
1123 SCM_SUBRF (code
) (obj
, value
);
1126 env
= SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (code
),
1127 scm_list_2 (obj
, value
),
1129 /* Evaluate the closure body */
1130 scm_eval_body (SCM_CLOSURE_BODY (code
), env
);
1133 return SCM_UNSPECIFIED
;
1137 set_slot_value_using_name (SCM
class, SCM obj
, SCM slot_name
, SCM value
)
1139 SCM slotdef
= slot_definition_using_name (class, slot_name
);
1140 if (!SCM_FALSEP (slotdef
))
1141 return set_slot_value (class, obj
, slotdef
, value
);
1143 return CALL_GF4 ("slot-missing", class, obj
, slot_name
, value
);
1147 test_slot_existence (SCM
class SCM_UNUSED
, SCM obj
, SCM slot_name
)
1151 for (l
= SCM_ACCESSORS_OF (obj
); !SCM_NULLP (l
); l
= SCM_CDR (l
))
1152 if (SCM_EQ_P (SCM_CAAR (l
), slot_name
))
1158 /* ======================================== */
1160 SCM_DEFINE (scm_slot_ref_using_class
, "slot-ref-using-class", 3, 0, 0,
1161 (SCM
class, SCM obj
, SCM slot_name
),
1163 #define FUNC_NAME s_scm_slot_ref_using_class
1167 SCM_VALIDATE_CLASS (1, class);
1168 SCM_VALIDATE_INSTANCE (2, obj
);
1169 SCM_VALIDATE_SYMBOL (3, slot_name
);
1171 res
= get_slot_value_using_name (class, obj
, slot_name
);
1172 if (SCM_GOOPS_UNBOUNDP (res
))
1173 return CALL_GF3 ("slot-unbound", class, obj
, slot_name
);
1179 SCM_DEFINE (scm_slot_set_using_class_x
, "slot-set-using-class!", 4, 0, 0,
1180 (SCM
class, SCM obj
, SCM slot_name
, SCM value
),
1182 #define FUNC_NAME s_scm_slot_set_using_class_x
1184 SCM_VALIDATE_CLASS (1, class);
1185 SCM_VALIDATE_INSTANCE (2, obj
);
1186 SCM_VALIDATE_SYMBOL (3, slot_name
);
1188 return set_slot_value_using_name (class, obj
, slot_name
, value
);
1193 SCM_DEFINE (scm_slot_bound_using_class_p
, "slot-bound-using-class?", 3, 0, 0,
1194 (SCM
class, SCM obj
, SCM slot_name
),
1196 #define FUNC_NAME s_scm_slot_bound_using_class_p
1198 SCM_VALIDATE_CLASS (1, class);
1199 SCM_VALIDATE_INSTANCE (2, obj
);
1200 SCM_VALIDATE_SYMBOL (3, slot_name
);
1202 return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class, obj
, slot_name
))
1208 SCM_DEFINE (scm_slot_exists_using_class_p
, "slot-exists-using-class?", 3, 0, 0,
1209 (SCM
class, SCM obj
, SCM slot_name
),
1211 #define FUNC_NAME s_scm_slot_exists_using_class_p
1213 SCM_VALIDATE_CLASS (1, class);
1214 SCM_VALIDATE_INSTANCE (2, obj
);
1215 SCM_VALIDATE_SYMBOL (3, slot_name
);
1216 return test_slot_existence (class, obj
, slot_name
);
1221 /* ======================================== */
1223 SCM_DEFINE (scm_slot_ref
, "slot-ref", 2, 0, 0,
1224 (SCM obj
, SCM slot_name
),
1225 "Return the value from @var{obj}'s slot with the name\n"
1227 #define FUNC_NAME s_scm_slot_ref
1231 SCM_VALIDATE_INSTANCE (1, obj
);
1232 TEST_CHANGE_CLASS (obj
, class);
1234 res
= get_slot_value_using_name (class, obj
, slot_name
);
1235 if (SCM_GOOPS_UNBOUNDP (res
))
1236 return CALL_GF3 ("slot-unbound", class, obj
, slot_name
);
1241 SCM_DEFINE (scm_slot_set_x
, "slot-set!", 3, 0, 0,
1242 (SCM obj
, SCM slot_name
, SCM value
),
1243 "Set the slot named @var{slot_name} of @var{obj} to @var{value}.")
1244 #define FUNC_NAME s_scm_slot_set_x
1248 SCM_VALIDATE_INSTANCE (1, obj
);
1249 TEST_CHANGE_CLASS(obj
, class);
1251 return set_slot_value_using_name (class, obj
, slot_name
, value
);
1255 const char *scm_s_slot_set_x
= s_scm_slot_set_x
;
1257 SCM_DEFINE (scm_slot_bound_p
, "slot-bound?", 2, 0, 0,
1258 (SCM obj
, SCM slot_name
),
1259 "Return @code{#t} if the slot named @var{slot_name} of @var{obj}\n"
1261 #define FUNC_NAME s_scm_slot_bound_p
1265 SCM_VALIDATE_INSTANCE (1, obj
);
1266 TEST_CHANGE_CLASS(obj
, class);
1268 return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class,
1276 SCM_DEFINE (scm_slots_exists_p
, "slot-exists?", 2, 0, 0,
1277 (SCM obj
, SCM slot_name
),
1278 "Return @code{#t} if @var{obj} has a slot named @var{slot_name}.")
1279 #define FUNC_NAME s_scm_slots_exists_p
1283 SCM_VALIDATE_INSTANCE (1, obj
);
1284 SCM_VALIDATE_SYMBOL (2, slot_name
);
1285 TEST_CHANGE_CLASS (obj
, class);
1287 return test_slot_existence (class, obj
, slot_name
);
1292 /******************************************************************************
1294 * %allocate-instance (the low level instance allocation primitive)
1296 ******************************************************************************/
1298 static void clear_method_cache (SCM
);
1301 wrap_init (SCM
class, SCM
*m
, long n
)
1305 /* Set all slots to unbound */
1306 for (i
= 0; i
< n
; i
++)
1307 m
[i
] = SCM_GOOPS_UNBOUND
;
1309 return scm_alloc_double_cell ((((scm_t_bits
) SCM_STRUCT_DATA (class))
1311 (scm_t_bits
) m
, 0, 0);
1314 SCM_DEFINE (scm_sys_allocate_instance
, "%allocate-instance", 2, 0, 0,
1315 (SCM
class, SCM initargs
),
1316 "Create a new instance of class @var{class} and initialize it\n"
1317 "from the arguments @var{initargs}.")
1318 #define FUNC_NAME s_scm_sys_allocate_instance
1323 SCM_VALIDATE_CLASS (1, class);
1325 /* Most instances */
1326 if (SCM_CLASS_FLAGS (class) & SCM_STRUCTF_LIGHT
)
1328 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1329 m
= (SCM
*) scm_must_malloc (n
* sizeof (SCM
), "instance");
1330 return wrap_init (class, m
, n
);
1333 /* Foreign objects */
1334 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_FOREIGN
)
1335 return scm_make_foreign_object (class, initargs
);
1337 n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
1340 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_ENTITY
)
1342 m
= (SCM
*) scm_alloc_struct (n
,
1343 scm_struct_entity_n_extra_words
,
1345 m
[scm_struct_i_setter
] = SCM_BOOL_F
;
1346 m
[scm_struct_i_procedure
] = SCM_BOOL_F
;
1347 /* Generic functions */
1348 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_PURE_GENERIC
)
1350 SCM gf
= wrap_init (class, m
, n
);
1351 clear_method_cache (gf
);
1355 return wrap_init (class, m
, n
);
1359 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_METACLASS
)
1363 /* allocate class object */
1364 SCM z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
1366 SCM_SET_SLOT (z
, scm_si_print
, SCM_GOOPS_UNBOUND
);
1367 for (i
= scm_si_goops_fields
; i
< n
; i
++)
1368 SCM_SET_SLOT (z
, i
, SCM_GOOPS_UNBOUND
);
1370 if (SCM_SUBCLASSP (class, scm_class_entity_class
))
1371 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
| SCM_CLASSF_ENTITY
);
1372 else if (SCM_SUBCLASSP (class, scm_class_operator_class
))
1373 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
);
1378 /* Non-light instances */
1380 m
= (SCM
*) scm_alloc_struct (n
,
1381 scm_struct_n_extra_words
,
1383 return wrap_init (class, m
, n
);
1388 SCM_DEFINE (scm_sys_set_object_setter_x
, "%set-object-setter!", 2, 0, 0,
1389 (SCM obj
, SCM setter
),
1391 #define FUNC_NAME s_scm_sys_set_object_setter_x
1393 SCM_ASSERT (SCM_STRUCTP (obj
)
1394 && ((SCM_CLASS_FLAGS (obj
) & SCM_CLASSF_OPERATOR
)
1395 || SCM_I_ENTITYP (obj
)),
1399 if (SCM_I_ENTITYP (obj
))
1400 SCM_SET_ENTITY_SETTER (obj
, setter
);
1402 SCM_OPERATOR_CLASS (obj
)->setter
= setter
;
1403 return SCM_UNSPECIFIED
;
1407 /******************************************************************************
1409 * %modify-instance (used by change-class to modify in place)
1411 ******************************************************************************/
1413 SCM_DEFINE (scm_sys_modify_instance
, "%modify-instance", 2, 0, 0,
1416 #define FUNC_NAME s_scm_sys_modify_instance
1418 SCM_VALIDATE_INSTANCE (1, old
);
1419 SCM_VALIDATE_INSTANCE (2, new);
1421 /* Exchange the data contained in old and new. We exchange rather than
1422 * scratch the old value with new to be correct with GC.
1423 * See "Class redefinition protocol above".
1427 SCM car
= SCM_CAR (old
);
1428 SCM cdr
= SCM_CDR (old
);
1429 SCM_SETCAR (old
, SCM_CAR (new));
1430 SCM_SETCDR (old
, SCM_CDR (new));
1431 SCM_SETCAR (new, car
);
1432 SCM_SETCDR (new, cdr
);
1435 return SCM_UNSPECIFIED
;
1439 SCM_DEFINE (scm_sys_modify_class
, "%modify-class", 2, 0, 0,
1442 #define FUNC_NAME s_scm_sys_modify_class
1444 SCM_VALIDATE_CLASS (1, old
);
1445 SCM_VALIDATE_CLASS (2, new);
1449 SCM car
= SCM_CAR (old
);
1450 SCM cdr
= SCM_CDR (old
);
1451 SCM_SETCAR (old
, SCM_CAR (new));
1452 SCM_SETCDR (old
, SCM_CDR (new));
1453 SCM_STRUCT_DATA (old
)[scm_vtable_index_vtable
] = SCM_UNPACK (old
);
1454 SCM_SETCAR (new, car
);
1455 SCM_SETCDR (new, cdr
);
1456 SCM_STRUCT_DATA (new)[scm_vtable_index_vtable
] = SCM_UNPACK (new);
1459 return SCM_UNSPECIFIED
;
1463 SCM_DEFINE (scm_sys_invalidate_class
, "%invalidate-class", 1, 0, 0,
1466 #define FUNC_NAME s_scm_sys_invalidate_class
1468 SCM_VALIDATE_CLASS (1, class);
1469 SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID
);
1470 return SCM_UNSPECIFIED
;
1474 /* When instances change class, they finally get a new body, but
1475 * before that, they go through purgatory in hell. Odd as it may
1476 * seem, this data structure saves us from eternal suffering in
1477 * infinite recursions.
1480 static scm_t_bits
**hell
;
1481 static long n_hell
= 1; /* one place for the evil one himself */
1482 static long hell_size
= 4;
1484 static scm_t_mutex hell_mutex
;
1491 for (i
= 1; i
< n_hell
; ++i
)
1492 if (SCM_STRUCT_DATA (o
) == hell
[i
])
1498 go_to_hell (void *o
)
1500 SCM obj
= SCM_PACK ((scm_t_bits
) o
);
1502 scm_mutex_lock (&hell_mutex
);
1504 if (n_hell
== hell_size
)
1506 long new_size
= 2 * hell_size
;
1507 hell
= scm_must_realloc (hell
, hell_size
, new_size
, "hell");
1508 hell_size
= new_size
;
1510 hell
[n_hell
++] = SCM_STRUCT_DATA (obj
);
1512 scm_mutex_unlock (&hell_mutex
);
1517 go_to_heaven (void *o
)
1520 scm_mutex_lock (&hell_mutex
);
1522 hell
[burnin (SCM_PACK ((scm_t_bits
) o
))] = hell
[--n_hell
];
1524 scm_mutex_unlock (&hell_mutex
);
1529 SCM_SYMBOL (scm_sym_change_class
, "change-class");
1532 purgatory (void *args
)
1534 return scm_apply_0 (GETVAR (scm_sym_change_class
),
1535 SCM_PACK ((scm_t_bits
) args
));
1539 scm_change_object_class (SCM obj
, SCM old_class SCM_UNUSED
, SCM new_class
)
1542 scm_internal_dynamic_wind (go_to_hell
, purgatory
, go_to_heaven
,
1543 (void *) SCM_UNPACK (scm_list_2 (obj
, new_class
)),
1544 (void *) SCM_UNPACK (obj
));
1547 /******************************************************************************
1553 * GGG E N E R I C F U N C T I O N S
1555 * This implementation provides
1556 * - generic functions (with class specializers)
1559 * - a hard-coded MOP for standard gf, which can be overloaded for non-std gf
1561 ******************************************************************************/
1563 SCM_KEYWORD (k_name
, "name");
1565 SCM_SYMBOL (sym_no_method
, "no-method");
1567 static SCM list_of_no_method
;
1569 SCM_SYMBOL (scm_sym_args
, "args");
1572 scm_make_method_cache (SCM gf
)
1574 return scm_list_5 (SCM_IM_DISPATCH
,
1577 scm_c_make_vector (SCM_INITIAL_MCACHE_SIZE
,
1583 clear_method_cache (SCM gf
)
1585 SCM cache
= scm_make_method_cache (gf
);
1586 SCM_SET_ENTITY_PROCEDURE (gf
, cache
);
1587 SCM_SET_SLOT (gf
, scm_si_used_by
, SCM_BOOL_F
);
1590 SCM_DEFINE (scm_sys_invalidate_method_cache_x
, "%invalidate-method-cache!", 1, 0, 0,
1593 #define FUNC_NAME s_scm_sys_invalidate_method_cache_x
1596 SCM_ASSERT (SCM_PUREGENERICP (gf
), gf
, SCM_ARG1
, FUNC_NAME
);
1597 used_by
= SCM_SLOT (gf
, scm_si_used_by
);
1598 if (!SCM_FALSEP (used_by
))
1600 SCM methods
= SCM_SLOT (gf
, scm_si_methods
);
1601 for (; SCM_CONSP (used_by
); used_by
= SCM_CDR (used_by
))
1602 scm_sys_invalidate_method_cache_x (SCM_CAR (used_by
));
1603 clear_method_cache (gf
);
1604 for (; SCM_CONSP (methods
); methods
= SCM_CDR (methods
))
1605 SCM_SET_SLOT (SCM_CAR (methods
), scm_si_code_table
, SCM_EOL
);
1608 SCM n
= SCM_SLOT (gf
, scm_si_n_specialized
);
1609 /* The sign of n is a flag indicating rest args. */
1610 SCM_SET_MCACHE_N_SPECIALIZED (SCM_ENTITY_PROCEDURE (gf
), n
);
1612 return SCM_UNSPECIFIED
;
1616 SCM_DEFINE (scm_generic_capability_p
, "generic-capability?", 1, 0, 0,
1619 #define FUNC_NAME s_scm_generic_capability_p
1621 SCM_ASSERT (!SCM_FALSEP (scm_procedure_p (proc
)),
1622 proc
, SCM_ARG1
, FUNC_NAME
);
1623 return (scm_subr_p (proc
) && SCM_SUBR_GENERIC (proc
)
1629 SCM_DEFINE (scm_enable_primitive_generic_x
, "enable-primitive-generic!", 0, 0, 1,
1632 #define FUNC_NAME s_scm_enable_primitive_generic_x
1634 SCM_VALIDATE_REST_ARGUMENT (subrs
);
1635 while (!SCM_NULLP (subrs
))
1637 SCM subr
= SCM_CAR (subrs
);
1638 SCM_ASSERT (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
),
1639 subr
, SCM_ARGn
, FUNC_NAME
);
1640 *SCM_SUBR_GENERIC (subr
)
1641 = scm_make (scm_list_3 (scm_class_generic
,
1644 subrs
= SCM_CDR (subrs
);
1646 return SCM_UNSPECIFIED
;
1650 SCM_DEFINE (scm_primitive_generic_generic
, "primitive-generic-generic", 1, 0, 0,
1653 #define FUNC_NAME s_scm_primitive_generic_generic
1655 if (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
))
1657 SCM gf
= *SCM_SUBR_GENERIC (subr
);
1661 SCM_WRONG_TYPE_ARG (SCM_ARG1
, subr
);
1665 /******************************************************************************
1667 * Protocol for calling a generic fumction
1668 * This protocol is roughly equivalent to (parameter are a little bit different
1669 * for efficiency reasons):
1671 * + apply-generic (gf args)
1672 * + compute-applicable-methods (gf args ...)
1673 * + sort-applicable-methods (methods args)
1674 * + apply-methods (gf methods args)
1676 * apply-methods calls make-next-method to build the "continuation" of a a
1677 * method. Applying a next-method will call apply-next-method which in
1678 * turn will call apply again to call effectively the following method.
1680 ******************************************************************************/
1683 applicablep (SCM actual
, SCM formal
)
1685 /* We already know that the cpl is well formed. */
1686 return !SCM_FALSEP (scm_c_memq (formal
, SCM_SLOT (actual
, scm_si_cpl
)));
1690 more_specificp (SCM m1
, SCM m2
, SCM
*targs
)
1692 register SCM s1
, s2
;
1696 * m1 and m2 can have != length (i.e. one can be one element longer than the
1697 * other when we have a dotted parameter list). For instance, with the call
1700 * (define-method M (a . l) ....)
1701 * (define-method M (a) ....)
1703 * we consider that the second method is more specific.
1705 * BTW, targs is an array of types. We don't need it's size since
1706 * we already know that m1 and m2 are applicable (no risk to go past
1707 * the end of this array).
1710 for (i
=0,s1
=SPEC_OF(m1
),s2
=SPEC_OF(m2
); ; i
++,s1
=SCM_CDR(s1
),s2
=SCM_CDR(s2
)) {
1711 if (SCM_NULLP(s1
)) return 1;
1712 if (SCM_NULLP(s2
)) return 0;
1713 if (SCM_CAR(s1
) != SCM_CAR(s2
)) {
1714 register SCM l
, cs1
= SCM_CAR(s1
), cs2
= SCM_CAR(s2
);
1716 for (l
= SCM_SLOT (targs
[i
], scm_si_cpl
); ; l
= SCM_CDR(l
)) {
1717 if (cs1
== SCM_CAR(l
))
1719 if (cs2
== SCM_CAR(l
))
1722 return 0;/* should not occur! */
1725 return 0; /* should not occur! */
1728 #define BUFFSIZE 32 /* big enough for most uses */
1731 scm_i_vector2list (SCM l
, long len
)
1734 SCM z
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1736 for (j
= 0; j
< len
; j
++, l
= SCM_CDR (l
)) {
1737 SCM_VELTS (z
)[j
] = SCM_CAR (l
);
1743 sort_applicable_methods (SCM method_list
, long size
, SCM
*targs
)
1746 SCM
*v
, vector
= SCM_EOL
;
1747 SCM buffer
[BUFFSIZE
];
1748 SCM save
= method_list
;
1750 /* For reasonably sized method_lists we can try to avoid all the
1751 * consing and reorder the list in place...
1752 * This idea is due to David McClain <Dave_McClain@msn.com>
1754 if (size
<= BUFFSIZE
)
1756 for (i
= 0; i
< size
; i
++)
1758 buffer
[i
] = SCM_CAR (method_list
);
1759 method_list
= SCM_CDR (method_list
);
1765 /* Too many elements in method_list to keep everything locally */
1766 vector
= scm_i_vector2list (save
, size
);
1767 v
= SCM_VELTS (vector
);
1770 /* Use a simple shell sort since it is generally faster than qsort on
1771 * small vectors (which is probably mostly the case when we have to
1772 * sort a list of applicable methods).
1774 for (incr
= size
/ 2; incr
; incr
/= 2)
1776 for (i
= incr
; i
< size
; i
++)
1778 for (j
= i
- incr
; j
>= 0; j
-= incr
)
1780 if (more_specificp (v
[j
], v
[j
+incr
], targs
))
1784 SCM tmp
= v
[j
+ incr
];
1792 if (size
<= BUFFSIZE
)
1794 /* We did it in locally, so restore the original list (reordered) in-place */
1795 for (i
= 0, method_list
= save
; i
< size
; i
++, v
++)
1797 SCM_SETCAR (method_list
, *v
);
1798 method_list
= SCM_CDR (method_list
);
1802 /* If we are here, that's that we did it the hard way... */
1803 return scm_vector_to_list (vector
);
1807 scm_compute_applicable_methods (SCM gf
, SCM args
, long len
, int find_method_p
)
1811 SCM l
, fl
, applicable
= SCM_EOL
;
1813 SCM buffer
[BUFFSIZE
], *types
, *p
;
1816 /* Build the list of arguments types */
1817 if (len
>= BUFFSIZE
) {
1818 tmp
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1819 /* NOTE: Using pointers to malloced memory won't work if we
1820 1. have preemtive threading, and,
1821 2. have a GC which moves objects. */
1822 types
= p
= SCM_VELTS(tmp
);
1827 for ( ; !SCM_NULLP (args
); args
= SCM_CDR (args
))
1828 *p
++ = scm_class_of (SCM_CAR (args
));
1830 /* Build a list of all applicable methods */
1831 for (l
= SCM_SLOT (gf
, scm_si_methods
); !SCM_NULLP (l
); l
= SCM_CDR (l
))
1833 fl
= SPEC_OF (SCM_CAR (l
));
1834 /* Only accept accessors which match exactly in first arg. */
1835 if (SCM_ACCESSORP (SCM_CAR (l
))
1836 && (SCM_NULLP (fl
) || types
[0] != SCM_CAR (fl
)))
1838 for (i
= 0; ; i
++, fl
= SCM_CDR (fl
))
1840 if (SCM_INSTANCEP (fl
)
1841 /* We have a dotted argument list */
1842 || (i
>= len
&& SCM_NULLP (fl
)))
1843 { /* both list exhausted */
1844 applicable
= scm_cons (SCM_CAR (l
), applicable
);
1850 || !applicablep (types
[i
], SCM_CAR (fl
)))
1859 CALL_GF2 ("no-applicable-method", gf
, save
);
1860 /* if we are here, it's because no-applicable-method hasn't signaled an error */
1865 : sort_applicable_methods (applicable
, count
, types
));
1869 SCM_PROC (s_sys_compute_applicable_methods
, "%compute-applicable-methods", 2, 0, 0, scm_sys_compute_applicable_methods
);
1872 static const char s_sys_compute_applicable_methods
[] = "%compute-applicable-methods";
1875 scm_sys_compute_applicable_methods (SCM gf
, SCM args
)
1876 #define FUNC_NAME s_sys_compute_applicable_methods
1879 SCM_VALIDATE_GENERIC (1, gf
);
1880 n
= scm_ilength (args
);
1881 SCM_ASSERT (n
>= 0, args
, SCM_ARG2
, FUNC_NAME
);
1882 return scm_compute_applicable_methods (gf
, args
, n
, 1);
1886 SCM_SYMBOL (sym_compute_applicable_methods
, "compute-applicable-methods");
1887 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
));
1889 SCM_SYNTAX (s_atslot_ref
, "@slot-ref", scm_makmmacro
, scm_m_atslot_ref
);
1892 scm_m_atslot_ref (SCM xorig
, SCM env SCM_UNUSED
)
1893 #define FUNC_NAME s_atslot_ref
1895 SCM x
= SCM_CDR (xorig
);
1896 SCM_ASSYNT (scm_ilength (x
) == 2, scm_s_expression
, FUNC_NAME
);
1897 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1898 return scm_cons (SCM_IM_SLOT_REF
, x
);
1903 SCM_SYNTAX (s_atslot_set_x
, "@slot-set!", scm_makmmacro
, scm_m_atslot_set_x
);
1906 scm_m_atslot_set_x (SCM xorig
, SCM env SCM_UNUSED
)
1907 #define FUNC_NAME s_atslot_set_x
1909 SCM x
= SCM_CDR (xorig
);
1910 SCM_ASSYNT (scm_ilength (x
) == 3, scm_s_expression
, FUNC_NAME
);
1911 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1912 return scm_cons (SCM_IM_SLOT_SET_X
, x
);
1917 SCM_SYNTAX (s_atdispatch
, "@dispatch", scm_makmmacro
, scm_m_atdispatch
);
1919 SCM_SYMBOL (sym_atdispatch
, s_atdispatch
);
1922 scm_m_atdispatch (SCM xorig
, SCM env
)
1923 #define FUNC_NAME s_atdispatch
1925 SCM args
, n
, v
, gf
, x
= SCM_CDR (xorig
);
1926 SCM_ASSYNT (scm_ilength (x
) == 4, scm_s_expression
, FUNC_NAME
);
1928 if (!SCM_CONSP (args
) && !SCM_SYMBOLP (args
))
1929 SCM_WRONG_TYPE_ARG (SCM_ARG1
, args
);
1931 n
= SCM_XEVALCAR (x
, env
);
1932 SCM_VALIDATE_INUM (SCM_ARG2
, n
);
1933 SCM_ASSERT_RANGE (0, n
, SCM_INUM (n
) >= 1);
1935 v
= SCM_XEVALCAR (x
, env
);
1936 SCM_VALIDATE_VECTOR (SCM_ARG3
, v
);
1938 gf
= SCM_XEVALCAR (x
, env
);
1939 SCM_VALIDATE_PUREGENERIC (SCM_ARG4
, gf
);
1940 return scm_list_5 (SCM_IM_DISPATCH
, args
, n
, v
, gf
);
1947 lock_cache_mutex (void *m
)
1949 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
1950 scm_lock_mutex (mutex
);
1954 unlock_cache_mutex (void *m
)
1956 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
1957 scm_unlock_mutex (mutex
);
1962 call_memoize_method (void *a
)
1964 SCM args
= SCM_PACK ((scm_t_bits
) a
);
1965 SCM gf
= SCM_CAR (args
);
1966 SCM x
= SCM_CADR (args
);
1967 /* First check if another thread has inserted a method between
1968 * the cache miss and locking the mutex.
1970 SCM cmethod
= scm_mcache_lookup_cmethod (x
, SCM_CDDR (args
));
1971 if (!SCM_FALSEP (cmethod
))
1973 /*fixme* Use scm_apply */
1974 return CALL_GF3 ("memoize-method!", gf
, SCM_CDDR (args
), x
);
1978 scm_memoize_method (SCM x
, SCM args
)
1980 SCM gf
= SCM_CAR (scm_last_pair (x
));
1982 return scm_internal_dynamic_wind (
1984 call_memoize_method
,
1986 (void *) SCM_UNPACK (scm_cons2 (gf
, x
, args
)),
1987 (void *) SCM_UNPACK (SCM_SLOT (gf
, scm_si_cache_mutex
)));
1989 return call_memoize_method ((void *) SCM_UNPACK (scm_cons2 (gf
, x
, args
)));
1993 /******************************************************************************
1995 * A simple make (which will be redefined later in Scheme)
1996 * This version handles only creation of gf, methods and classes (no instances)
1998 * Since this code will disappear when Goops will be fully booted,
1999 * no precaution is taken to be efficient.
2001 ******************************************************************************/
2003 SCM_KEYWORD (k_setter
, "setter");
2004 SCM_KEYWORD (k_specializers
, "specializers");
2005 SCM_KEYWORD (k_procedure
, "procedure");
2006 SCM_KEYWORD (k_dsupers
, "dsupers");
2007 SCM_KEYWORD (k_slots
, "slots");
2008 SCM_KEYWORD (k_gf
, "generic-function");
2010 SCM_DEFINE (scm_make
, "make", 0, 0, 1,
2012 "Make a new object. @var{args} must contain the class and\n"
2013 "all necessary initialization information.")
2014 #define FUNC_NAME s_scm_make
2017 long len
= scm_ilength (args
);
2019 if (len
<= 0 || (len
& 1) == 0)
2020 SCM_WRONG_NUM_ARGS ();
2022 class = SCM_CAR(args
);
2023 args
= SCM_CDR(args
);
2025 if (class == scm_class_generic
|| class == scm_class_generic_with_setter
)
2028 z
= scm_make_struct (class, SCM_INUM0
,
2029 scm_list_4 (SCM_EOL
,
2032 scm_make_mutex ()));
2034 z
= scm_make_struct (class, SCM_INUM0
,
2035 scm_list_3 (SCM_EOL
, SCM_INUM0
, SCM_BOOL_F
));
2037 scm_set_procedure_property_x (z
, scm_sym_name
,
2038 scm_get_keyword (k_name
,
2041 clear_method_cache (z
);
2042 if (class == scm_class_generic_with_setter
)
2044 SCM setter
= scm_get_keyword (k_setter
, args
, SCM_BOOL_F
);
2045 if (!SCM_FALSEP (setter
))
2046 scm_sys_set_object_setter_x (z
, setter
);
2051 z
= scm_sys_allocate_instance (class, args
);
2053 if (class == scm_class_method
2054 || class == scm_class_simple_method
2055 || class == scm_class_accessor
)
2057 SCM_SET_SLOT (z
, scm_si_generic_function
,
2058 scm_i_get_keyword (k_gf
,
2063 SCM_SET_SLOT (z
, scm_si_specializers
,
2064 scm_i_get_keyword (k_specializers
,
2069 SCM_SET_SLOT (z
, scm_si_procedure
,
2070 scm_i_get_keyword (k_procedure
,
2075 SCM_SET_SLOT (z
, scm_si_code_table
, SCM_EOL
);
2079 /* In all the others case, make a new class .... No instance here */
2080 SCM_SET_SLOT (z
, scm_si_name
,
2081 scm_i_get_keyword (k_name
,
2084 scm_str2symbol ("???"),
2086 SCM_SET_SLOT (z
, scm_si_direct_supers
,
2087 scm_i_get_keyword (k_dsupers
,
2092 SCM_SET_SLOT (z
, scm_si_direct_slots
,
2093 scm_i_get_keyword (k_slots
,
2104 SCM_DEFINE (scm_find_method
, "find-method", 0, 0, 1,
2107 #define FUNC_NAME s_scm_find_method
2110 long len
= scm_ilength (l
);
2113 SCM_WRONG_NUM_ARGS ();
2115 gf
= SCM_CAR(l
); l
= SCM_CDR(l
);
2116 SCM_VALIDATE_GENERIC (1, gf
);
2117 if (SCM_NULLP (SCM_SLOT (gf
, scm_si_methods
)))
2118 SCM_MISC_ERROR ("no methods for generic ~S", scm_list_1 (gf
));
2120 return scm_compute_applicable_methods (gf
, l
, len
- 1, 1);
2124 SCM_DEFINE (scm_sys_method_more_specific_p
, "%method-more-specific?", 3, 0, 0,
2125 (SCM m1
, SCM m2
, SCM targs
),
2127 #define FUNC_NAME s_scm_sys_method_more_specific_p
2132 SCM_VALIDATE_METHOD (1, m1
);
2133 SCM_VALIDATE_METHOD (2, m2
);
2134 SCM_ASSERT ((len
= scm_ilength (targs
)) != -1, targs
, SCM_ARG3
, FUNC_NAME
);
2136 /* Verify that all the arguments of targs are classes and place them in a vector*/
2137 v
= scm_c_make_vector (len
, SCM_EOL
);
2139 for (i
= 0, l
= targs
; !SCM_NULLP (l
); i
++, l
= SCM_CDR (l
)) {
2140 SCM_ASSERT (SCM_CLASSP (SCM_CAR (l
)), targs
, SCM_ARG3
, FUNC_NAME
);
2141 SCM_VELTS(v
)[i
] = SCM_CAR(l
);
2143 return more_specificp (m1
, m2
, SCM_VELTS(v
)) ? SCM_BOOL_T
: SCM_BOOL_F
;
2149 /******************************************************************************
2153 ******************************************************************************/
2157 make_stdcls (SCM
*var
, char *name
, SCM meta
, SCM super
, SCM slots
)
2159 SCM tmp
= scm_str2symbol (name
);
2161 *var
= scm_permanent_object (scm_basic_make_class (meta
,
2165 : scm_list_1 (super
),
2171 SCM_KEYWORD (k_slot_definition
, "slot-definition");
2174 create_standard_classes (void)
2177 SCM method_slots
= scm_list_4 (scm_str2symbol ("generic-function"),
2178 scm_str2symbol ("specializers"),
2180 scm_str2symbol ("code-table"));
2181 SCM amethod_slots
= scm_list_1 (scm_list_3 (scm_str2symbol ("slot-definition"),
2183 k_slot_definition
));
2185 SCM mutex_slot
= scm_list_1 (scm_str2symbol ("make-mutex"));
2187 SCM mutex_slot
= SCM_BOOL_F
;
2189 SCM gf_slots
= scm_list_4 (scm_str2symbol ("methods"),
2190 scm_list_3 (scm_str2symbol ("n-specialized"),
2193 scm_list_3 (scm_str2symbol ("used-by"),
2196 scm_list_3 (scm_str2symbol ("cache-mutex"),
2198 scm_closure (scm_list_2 (SCM_EOL
,
2202 /* Foreign class slot classes */
2203 make_stdcls (&scm_class_foreign_slot
, "<foreign-slot>",
2204 scm_class_class
, scm_class_top
, SCM_EOL
);
2205 make_stdcls (&scm_class_protected
, "<protected-slot>",
2206 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2207 make_stdcls (&scm_class_opaque
, "<opaque-slot>",
2208 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2209 make_stdcls (&scm_class_read_only
, "<read-only-slot>",
2210 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2211 make_stdcls (&scm_class_self
, "<self-slot>",
2213 scm_list_2 (scm_class_foreign_slot
, scm_class_read_only
),
2215 make_stdcls (&scm_class_protected_opaque
, "<protected-opaque-slot>",
2217 scm_list_2 (scm_class_protected
, scm_class_opaque
),
2219 make_stdcls (&scm_class_protected_read_only
, "<protected-read-only-slot>",
2221 scm_list_2 (scm_class_protected
, scm_class_read_only
),
2223 make_stdcls (&scm_class_scm
, "<scm-slot>",
2224 scm_class_class
, scm_class_protected
, SCM_EOL
);
2225 make_stdcls (&scm_class_int
, "<int-slot>",
2226 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2227 make_stdcls (&scm_class_float
, "<float-slot>",
2228 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2229 make_stdcls (&scm_class_double
, "<double-slot>",
2230 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2232 /* Continue initialization of class <class> */
2234 slots
= build_class_class_slots ();
2235 SCM_SET_SLOT (scm_class_class
, scm_si_direct_slots
, slots
);
2236 SCM_SET_SLOT (scm_class_class
, scm_si_slots
, slots
);
2237 SCM_SET_SLOT (scm_class_class
, scm_si_getters_n_setters
,
2238 compute_getters_n_setters (slots
));
2240 make_stdcls (&scm_class_foreign_class
, "<foreign-class>",
2241 scm_class_class
, scm_class_class
,
2242 scm_list_2 (scm_list_3 (scm_str2symbol ("constructor"),
2245 scm_list_3 (scm_str2symbol ("destructor"),
2247 scm_class_opaque
)));
2248 make_stdcls (&scm_class_foreign_object
, "<foreign-object>",
2249 scm_class_foreign_class
, scm_class_object
, SCM_EOL
);
2250 SCM_SET_CLASS_FLAGS (scm_class_foreign_object
, SCM_CLASSF_FOREIGN
);
2252 /* scm_class_generic functions classes */
2253 make_stdcls (&scm_class_procedure_class
, "<procedure-class>",
2254 scm_class_class
, scm_class_class
, SCM_EOL
);
2255 make_stdcls (&scm_class_entity_class
, "<entity-class>",
2256 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2257 make_stdcls (&scm_class_operator_class
, "<operator-class>",
2258 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2259 make_stdcls (&scm_class_operator_with_setter_class
,
2260 "<operator-with-setter-class>",
2261 scm_class_class
, scm_class_operator_class
, SCM_EOL
);
2262 make_stdcls (&scm_class_method
, "<method>",
2263 scm_class_class
, scm_class_object
, method_slots
);
2264 make_stdcls (&scm_class_simple_method
, "<simple-method>",
2265 scm_class_class
, scm_class_method
, SCM_EOL
);
2266 SCM_SET_CLASS_FLAGS (scm_class_simple_method
, SCM_CLASSF_SIMPLE_METHOD
);
2267 make_stdcls (&scm_class_accessor
, "<accessor-method>",
2268 scm_class_class
, scm_class_simple_method
, amethod_slots
);
2269 SCM_SET_CLASS_FLAGS (scm_class_accessor
, SCM_CLASSF_ACCESSOR_METHOD
);
2270 make_stdcls (&scm_class_entity
, "<entity>",
2271 scm_class_entity_class
, scm_class_object
, SCM_EOL
);
2272 make_stdcls (&scm_class_entity_with_setter
, "<entity-with-setter>",
2273 scm_class_entity_class
, scm_class_entity
, SCM_EOL
);
2274 make_stdcls (&scm_class_generic
, "<generic>",
2275 scm_class_entity_class
, scm_class_entity
, gf_slots
);
2276 SCM_SET_CLASS_FLAGS (scm_class_generic
, SCM_CLASSF_PURE_GENERIC
);
2277 make_stdcls (&scm_class_generic_with_setter
, "<generic-with-setter>",
2278 scm_class_entity_class
,
2279 scm_list_2 (scm_class_generic
, scm_class_entity_with_setter
),
2282 /* Patch cpl since compute_cpl doesn't support multiple inheritance. */
2283 SCM_SET_SLOT (scm_class_generic_with_setter
, scm_si_cpl
,
2284 scm_append (scm_list_3 (scm_list_2 (scm_class_generic_with_setter
,
2286 SCM_SLOT (scm_class_entity_with_setter
,
2290 SCM_SET_CLASS_FLAGS (scm_class_generic_with_setter
, SCM_CLASSF_PURE_GENERIC
);
2292 /* Primitive types classes */
2293 make_stdcls (&scm_class_boolean
, "<boolean>",
2294 scm_class_class
, scm_class_top
, SCM_EOL
);
2295 make_stdcls (&scm_class_char
, "<char>",
2296 scm_class_class
, scm_class_top
, SCM_EOL
);
2297 make_stdcls (&scm_class_list
, "<list>",
2298 scm_class_class
, scm_class_top
, SCM_EOL
);
2299 make_stdcls (&scm_class_pair
, "<pair>",
2300 scm_class_class
, scm_class_list
, SCM_EOL
);
2301 make_stdcls (&scm_class_null
, "<null>",
2302 scm_class_class
, scm_class_list
, SCM_EOL
);
2303 make_stdcls (&scm_class_string
, "<string>",
2304 scm_class_class
, scm_class_top
, SCM_EOL
);
2305 make_stdcls (&scm_class_symbol
, "<symbol>",
2306 scm_class_class
, scm_class_top
, SCM_EOL
);
2307 make_stdcls (&scm_class_vector
, "<vector>",
2308 scm_class_class
, scm_class_top
, SCM_EOL
);
2309 make_stdcls (&scm_class_number
, "<number>",
2310 scm_class_class
, scm_class_top
, SCM_EOL
);
2311 make_stdcls (&scm_class_complex
, "<complex>",
2312 scm_class_class
, scm_class_number
, SCM_EOL
);
2313 make_stdcls (&scm_class_real
, "<real>",
2314 scm_class_class
, scm_class_complex
, SCM_EOL
);
2315 make_stdcls (&scm_class_integer
, "<integer>",
2316 scm_class_class
, scm_class_real
, SCM_EOL
);
2317 make_stdcls (&scm_class_keyword
, "<keyword>",
2318 scm_class_class
, scm_class_top
, SCM_EOL
);
2319 make_stdcls (&scm_class_unknown
, "<unknown>",
2320 scm_class_class
, scm_class_top
, SCM_EOL
);
2321 make_stdcls (&scm_class_procedure
, "<procedure>",
2322 scm_class_procedure_class
, scm_class_top
, SCM_EOL
);
2323 make_stdcls (&scm_class_procedure_with_setter
, "<procedure-with-setter>",
2324 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2325 make_stdcls (&scm_class_primitive_generic
, "<primitive-generic>",
2326 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2327 make_stdcls (&scm_class_port
, "<port>",
2328 scm_class_class
, scm_class_top
, SCM_EOL
);
2329 make_stdcls (&scm_class_input_port
, "<input-port>",
2330 scm_class_class
, scm_class_port
, SCM_EOL
);
2331 make_stdcls (&scm_class_output_port
, "<output-port>",
2332 scm_class_class
, scm_class_port
, SCM_EOL
);
2333 make_stdcls (&scm_class_input_output_port
, "<input-output-port>",
2335 scm_list_2 (scm_class_input_port
, scm_class_output_port
),
2339 /**********************************************************************
2343 **********************************************************************/
2346 make_class_from_template (char *template, char *type_name
, SCM supers
)
2352 sprintf (buffer
, template, type_name
);
2353 name
= scm_str2symbol (buffer
);
2356 name
= SCM_GOOPS_UNBOUND
;
2358 class = scm_permanent_object (scm_basic_make_class (scm_class_class
,
2363 /* Only define name if doesn't already exist. */
2364 if (!SCM_GOOPS_UNBOUNDP (name
)
2365 && SCM_FALSEP (scm_call_2 (scm_goops_lookup_closure
, name
, SCM_BOOL_F
)))
2366 DEFVAR (name
, class);
2371 scm_make_extended_class (char *type_name
)
2373 return make_class_from_template ("<%s>",
2375 scm_list_1 (scm_class_top
));
2379 create_smob_classes (void)
2383 scm_smob_class
= (SCM
*) malloc (255 * sizeof (SCM
));
2384 for (i
= 0; i
< 255; ++i
)
2385 scm_smob_class
[i
] = 0;
2387 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_big
)] = scm_class_integer
;
2388 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_real
)] = scm_class_real
;
2389 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_complex
)] = scm_class_complex
;
2390 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_keyword
)] = scm_class_keyword
;
2392 for (i
= 0; i
< scm_numsmob
; ++i
)
2393 if (!scm_smob_class
[i
])
2394 scm_smob_class
[i
] = scm_make_extended_class (SCM_SMOBNAME (i
));
2398 scm_make_port_classes (long ptobnum
, char *type_name
)
2400 SCM c
, class = make_class_from_template ("<%s-port>",
2402 scm_list_1 (scm_class_port
));
2403 scm_port_class
[SCM_IN_PCLASS_INDEX
+ ptobnum
]
2404 = make_class_from_template ("<%s-input-port>",
2406 scm_list_2 (class, scm_class_input_port
));
2407 scm_port_class
[SCM_OUT_PCLASS_INDEX
+ ptobnum
]
2408 = make_class_from_template ("<%s-output-port>",
2410 scm_list_2 (class, scm_class_output_port
));
2411 scm_port_class
[SCM_INOUT_PCLASS_INDEX
+ ptobnum
]
2413 = make_class_from_template ("<%s-input-output-port>",
2415 scm_list_2 (class, scm_class_input_output_port
));
2416 /* Patch cpl (since this tree is too complex for the C level compute-cpl) */
2417 SCM_SET_SLOT (c
, scm_si_cpl
,
2418 scm_cons2 (c
, class, SCM_SLOT (scm_class_input_output_port
, scm_si_cpl
)));
2422 create_port_classes (void)
2426 scm_port_class
= (SCM
*) malloc (3 * 256 * sizeof (SCM
));
2427 for (i
= 0; i
< 3 * 256; ++i
)
2428 scm_port_class
[i
] = 0;
2430 for (i
= 0; i
< scm_numptob
; ++i
)
2431 scm_make_port_classes (i
, SCM_PTOBNAME (i
));
2435 make_struct_class (void *closure SCM_UNUSED
, SCM key SCM_UNUSED
,
2436 SCM data
, SCM prev SCM_UNUSED
)
2438 if (!SCM_FALSEP (SCM_STRUCT_TABLE_NAME (data
)))
2439 SCM_SET_STRUCT_TABLE_CLASS (data
,
2440 scm_make_extended_class
2441 (SCM_SYMBOL_CHARS (SCM_STRUCT_TABLE_NAME (data
))));
2442 return SCM_UNSPECIFIED
;
2446 create_struct_classes (void)
2448 scm_internal_hash_fold (make_struct_class
, 0, SCM_BOOL_F
, scm_struct_table
);
2451 /**********************************************************************
2455 **********************************************************************/
2460 if (!goops_loaded_p
)
2461 scm_c_resolve_module ("oop goops");
2466 scm_make_foreign_object (SCM
class, SCM initargs
)
2467 #define FUNC_NAME s_scm_make
2469 void * (*constructor
) (SCM
)
2470 = (void * (*) (SCM
)) SCM_SLOT (class, scm_si_constructor
);
2471 if (constructor
== 0)
2472 SCM_MISC_ERROR ("Can't make instances of class ~S", scm_list_1 (class));
2473 return scm_wrap_object (class, constructor (initargs
));
2479 scm_free_foreign_object (SCM
*class, SCM
*data
)
2481 size_t (*destructor
) (void *)
2482 = (size_t (*) (void *)) class[scm_si_destructor
];
2483 return destructor (data
);
2487 scm_make_class (SCM meta
, char *s_name
, SCM supers
, size_t size
,
2488 void * (*constructor
) (SCM initargs
),
2489 size_t (*destructor
) (void *))
2492 name
= scm_str2symbol (s_name
);
2493 if (SCM_NULLP (supers
))
2494 supers
= scm_list_1 (scm_class_foreign_object
);
2495 class = scm_basic_basic_make_class (meta
, name
, supers
, SCM_EOL
);
2496 scm_sys_inherit_magic_x (class, supers
);
2498 if (destructor
!= 0)
2500 SCM_SET_SLOT (class, scm_si_destructor
, (SCM
) destructor
);
2501 SCM_SET_CLASS_DESTRUCTOR (class, scm_free_foreign_object
);
2505 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
2506 SCM_SET_CLASS_INSTANCE_SIZE (class, size
);
2509 SCM_SET_SLOT (class, scm_si_layout
, scm_str2symbol (""));
2510 SCM_SET_SLOT (class, scm_si_constructor
, (SCM
) constructor
);
2515 SCM_SYMBOL (sym_o
, "o");
2516 SCM_SYMBOL (sym_x
, "x");
2518 SCM_KEYWORD (k_accessor
, "accessor");
2519 SCM_KEYWORD (k_getter
, "getter");
2522 default_setter (SCM obj SCM_UNUSED
, SCM c SCM_UNUSED
)
2524 scm_misc_error ("slot-set!", "read-only slot", SCM_EOL
);
2529 scm_add_slot (SCM
class, char *slot_name
, SCM slot_class
,
2530 SCM (*getter
) (SCM obj
),
2531 SCM (*setter
) (SCM obj
, SCM x
),
2532 char *accessor_name
)
2535 SCM get
= scm_c_make_subr ("goops:get", scm_tc7_subr_1
, getter
);
2536 SCM set
= scm_c_make_subr ("goops:set", scm_tc7_subr_2
,
2537 setter
? setter
: default_setter
);
2538 SCM getm
= scm_closure (scm_list_2 (scm_list_1 (sym_o
),
2539 scm_list_2 (get
, sym_o
)),
2541 SCM setm
= scm_closure (scm_list_2 (scm_list_2 (sym_o
, sym_x
),
2542 scm_list_3 (set
, sym_o
, sym_x
)),
2545 SCM name
= scm_str2symbol (slot_name
);
2546 SCM aname
= scm_str2symbol (accessor_name
);
2547 SCM gf
= scm_ensure_accessor (aname
);
2548 SCM slot
= scm_list_5 (name
,
2551 setter
? k_accessor
: k_getter
,
2553 SCM gns
= scm_list_4 (name
, SCM_BOOL_F
, get
, set
);
2555 scm_add_method (gf
, scm_make (scm_list_5 (scm_class_accessor
,
2560 scm_add_method (scm_setter (gf
),
2561 scm_make (scm_list_5 (scm_class_accessor
,
2563 scm_list_2 (class, scm_class_top
),
2568 SCM_SET_SLOT (class, scm_si_slots
,
2569 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_slots
),
2570 scm_list_1 (slot
))));
2571 SCM_SET_SLOT (class, scm_si_getters_n_setters
,
2572 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_getters_n_setters
),
2573 scm_list_1 (gns
))));
2577 long n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
2579 SCM_SET_SLOT (class, scm_si_nfields
, SCM_MAKINUM (n
+ 1));
2584 scm_wrap_object (SCM
class, void *data
)
2586 return scm_alloc_double_cell (SCM_UNPACK (SCM_CDR (class)) | scm_tc3_struct
,
2594 scm_wrap_component (SCM
class, SCM container
, void *data
)
2596 SCM obj
= scm_wrap_object (class, data
);
2597 SCM handle
= scm_hash_fn_create_handle_x (scm_components
,
2603 SCM_SETCDR (handle
, container
);
2608 scm_ensure_accessor (SCM name
)
2610 SCM gf
= scm_call_2 (SCM_TOP_LEVEL_LOOKUP_CLOSURE
, name
, SCM_BOOL_F
);
2611 if (!SCM_IS_A_P (gf
, scm_class_generic_with_setter
))
2613 gf
= scm_make (scm_list_3 (scm_class_generic
, k_name
, name
));
2614 gf
= scm_make (scm_list_5 (scm_class_generic_with_setter
,
2615 k_name
, name
, k_setter
, gf
));
2620 SCM_SYMBOL (sym_internal_add_method_x
, "internal-add-method!");
2623 scm_add_method (SCM gf
, SCM m
)
2625 scm_eval (scm_list_3 (sym_internal_add_method_x
, gf
, m
), scm_module_goops
);
2630 * Debugging utilities
2633 SCM_DEFINE (scm_pure_generic_p
, "pure-generic?", 1, 0, 0,
2635 "Return @code{#t} if @var{obj} is a pure generic.")
2636 #define FUNC_NAME s_scm_pure_generic_p
2638 return SCM_BOOL (SCM_PUREGENERICP (obj
));
2642 #endif /* GUILE_DEBUG */
2648 SCM_DEFINE (scm_sys_goops_loaded
, "%goops-loaded", 0, 0, 0,
2650 "Announce that GOOPS is loaded and perform initialization\n"
2651 "on the C level which depends on the loaded GOOPS modules.")
2652 #define FUNC_NAME s_scm_sys_goops_loaded
2655 var_compute_applicable_methods
=
2656 scm_sym2var (sym_compute_applicable_methods
, scm_goops_lookup_closure
,
2658 return SCM_UNSPECIFIED
;
2662 SCM scm_module_goops
;
2665 scm_init_goops_builtins (void)
2667 scm_module_goops
= scm_current_module ();
2668 scm_goops_lookup_closure
= scm_module_lookup_closure (scm_module_goops
);
2670 /* Not really necessary right now, but who knows...
2672 scm_permanent_object (scm_module_goops
);
2673 scm_permanent_object (scm_goops_lookup_closure
);
2675 scm_components
= scm_permanent_object (scm_make_weak_key_hash_table
2676 (SCM_MAKINUM (37)));
2678 goops_rstate
= scm_c_make_rstate ("GOOPS", 5);
2680 #ifndef SCM_MAGIC_SNARFER
2681 #include "libguile/goops.x"
2684 list_of_no_method
= scm_permanent_object (scm_list_1 (sym_no_method
));
2686 hell
= scm_must_malloc (hell_size
, "hell");
2688 scm_mutex_init (&hell_mutex
);
2691 create_basic_classes ();
2692 create_standard_classes ();
2693 create_smob_classes ();
2694 create_struct_classes ();
2695 create_port_classes ();
2698 SCM name
= scm_str2symbol ("no-applicable-method");
2699 scm_no_applicable_method
2700 = scm_permanent_object (scm_make (scm_list_3 (scm_class_generic
,
2703 DEFVAR (name
, scm_no_applicable_method
);
2706 return SCM_UNSPECIFIED
;
2712 scm_c_define_gsubr ("%init-goops-builtins", 0, 0, 0,
2713 scm_init_goops_builtins
);