1 /* Copyright (C) 1998,1999,2000,2001, 2002 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_malloc (n
) : 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_gc_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 for 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_slot_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_slot_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_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_gc_malloc (n
* sizeof (SCM
), "struct");
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
, scm_struct_entity_n_extra_words
,
1344 m
[scm_struct_i_setter
] = SCM_BOOL_F
;
1345 m
[scm_struct_i_procedure
] = SCM_BOOL_F
;
1346 /* Generic functions */
1347 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_PURE_GENERIC
)
1349 SCM gf
= wrap_init (class, m
, n
);
1350 clear_method_cache (gf
);
1354 return wrap_init (class, m
, n
);
1358 if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_METACLASS
)
1362 /* allocate class object */
1363 SCM z
= scm_make_struct (class, SCM_INUM0
, SCM_EOL
);
1365 SCM_SET_SLOT (z
, scm_si_print
, SCM_GOOPS_UNBOUND
);
1366 for (i
= scm_si_goops_fields
; i
< n
; i
++)
1367 SCM_SET_SLOT (z
, i
, SCM_GOOPS_UNBOUND
);
1369 if (SCM_SUBCLASSP (class, scm_class_entity_class
))
1370 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
| SCM_CLASSF_ENTITY
);
1371 else if (SCM_SUBCLASSP (class, scm_class_operator_class
))
1372 SCM_SET_CLASS_FLAGS (z
, SCM_CLASSF_OPERATOR
);
1377 /* Non-light instances */
1379 m
= (SCM
*) scm_alloc_struct (n
, scm_struct_n_extra_words
, "heavy struct");
1380 return wrap_init (class, m
, n
);
1385 SCM_DEFINE (scm_sys_set_object_setter_x
, "%set-object-setter!", 2, 0, 0,
1386 (SCM obj
, SCM setter
),
1388 #define FUNC_NAME s_scm_sys_set_object_setter_x
1390 SCM_ASSERT (SCM_STRUCTP (obj
)
1391 && ((SCM_CLASS_FLAGS (obj
) & SCM_CLASSF_OPERATOR
)
1392 || SCM_I_ENTITYP (obj
)),
1396 if (SCM_I_ENTITYP (obj
))
1397 SCM_SET_ENTITY_SETTER (obj
, setter
);
1399 SCM_OPERATOR_CLASS (obj
)->setter
= setter
;
1400 return SCM_UNSPECIFIED
;
1404 /******************************************************************************
1406 * %modify-instance (used by change-class to modify in place)
1408 ******************************************************************************/
1410 SCM_DEFINE (scm_sys_modify_instance
, "%modify-instance", 2, 0, 0,
1413 #define FUNC_NAME s_scm_sys_modify_instance
1415 SCM_VALIDATE_INSTANCE (1, old
);
1416 SCM_VALIDATE_INSTANCE (2, new);
1418 /* Exchange the data contained in old and new. We exchange rather than
1419 * scratch the old value with new to be correct with GC.
1420 * See "Class redefinition protocol above".
1424 SCM car
= SCM_CAR (old
);
1425 SCM cdr
= SCM_CDR (old
);
1426 SCM_SETCAR (old
, SCM_CAR (new));
1427 SCM_SETCDR (old
, SCM_CDR (new));
1428 SCM_SETCAR (new, car
);
1429 SCM_SETCDR (new, cdr
);
1432 return SCM_UNSPECIFIED
;
1436 SCM_DEFINE (scm_sys_modify_class
, "%modify-class", 2, 0, 0,
1439 #define FUNC_NAME s_scm_sys_modify_class
1441 SCM_VALIDATE_CLASS (1, old
);
1442 SCM_VALIDATE_CLASS (2, new);
1446 SCM car
= SCM_CAR (old
);
1447 SCM cdr
= SCM_CDR (old
);
1448 SCM_SETCAR (old
, SCM_CAR (new));
1449 SCM_SETCDR (old
, SCM_CDR (new));
1450 SCM_STRUCT_DATA (old
)[scm_vtable_index_vtable
] = SCM_UNPACK (old
);
1451 SCM_SETCAR (new, car
);
1452 SCM_SETCDR (new, cdr
);
1453 SCM_STRUCT_DATA (new)[scm_vtable_index_vtable
] = SCM_UNPACK (new);
1456 return SCM_UNSPECIFIED
;
1460 SCM_DEFINE (scm_sys_invalidate_class
, "%invalidate-class", 1, 0, 0,
1463 #define FUNC_NAME s_scm_sys_invalidate_class
1465 SCM_VALIDATE_CLASS (1, class);
1466 SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID
);
1467 return SCM_UNSPECIFIED
;
1471 /* When instances change class, they finally get a new body, but
1472 * before that, they go through purgatory in hell. Odd as it may
1473 * seem, this data structure saves us from eternal suffering in
1474 * infinite recursions.
1477 static scm_t_bits
**hell
;
1478 static long n_hell
= 1; /* one place for the evil one himself */
1479 static long hell_size
= 4;
1480 static SCM hell_mutex
;
1486 for (i
= 1; i
< n_hell
; ++i
)
1487 if (SCM_STRUCT_DATA (o
) == hell
[i
])
1493 go_to_hell (void *o
)
1495 SCM obj
= SCM_PACK ((scm_t_bits
) o
);
1496 scm_lock_mutex (hell_mutex
);
1497 if (n_hell
== hell_size
)
1499 long new_size
= 2 * hell_size
;
1500 hell
= scm_realloc (hell
, new_size
);
1501 hell_size
= new_size
;
1503 hell
[n_hell
++] = SCM_STRUCT_DATA (obj
);
1504 scm_unlock_mutex (hell_mutex
);
1508 go_to_heaven (void *o
)
1510 scm_lock_mutex (hell_mutex
);
1511 hell
[burnin (SCM_PACK ((scm_t_bits
) o
))] = hell
[--n_hell
];
1512 scm_unlock_mutex (hell_mutex
);
1516 SCM_SYMBOL (scm_sym_change_class
, "change-class");
1519 purgatory (void *args
)
1521 return scm_apply_0 (GETVAR (scm_sym_change_class
),
1522 SCM_PACK ((scm_t_bits
) args
));
1526 scm_change_object_class (SCM obj
, SCM old_class SCM_UNUSED
, SCM new_class
)
1529 scm_internal_dynamic_wind (go_to_hell
, purgatory
, go_to_heaven
,
1530 (void *) SCM_UNPACK (scm_list_2 (obj
, new_class
)),
1531 (void *) SCM_UNPACK (obj
));
1534 /******************************************************************************
1540 * GGG E N E R I C F U N C T I O N S
1542 * This implementation provides
1543 * - generic functions (with class specializers)
1546 * - a hard-coded MOP for standard gf, which can be overloaded for non-std gf
1548 ******************************************************************************/
1550 SCM_KEYWORD (k_name
, "name");
1552 SCM_SYMBOL (sym_no_method
, "no-method");
1554 static SCM list_of_no_method
;
1556 SCM_SYMBOL (scm_sym_args
, "args");
1559 scm_make_method_cache (SCM gf
)
1561 return scm_list_5 (SCM_IM_DISPATCH
,
1564 scm_c_make_vector (SCM_INITIAL_MCACHE_SIZE
,
1570 clear_method_cache (SCM gf
)
1572 SCM cache
= scm_make_method_cache (gf
);
1573 SCM_SET_ENTITY_PROCEDURE (gf
, cache
);
1574 SCM_SET_SLOT (gf
, scm_si_used_by
, SCM_BOOL_F
);
1577 SCM_DEFINE (scm_sys_invalidate_method_cache_x
, "%invalidate-method-cache!", 1, 0, 0,
1580 #define FUNC_NAME s_scm_sys_invalidate_method_cache_x
1583 SCM_ASSERT (SCM_PUREGENERICP (gf
), gf
, SCM_ARG1
, FUNC_NAME
);
1584 used_by
= SCM_SLOT (gf
, scm_si_used_by
);
1585 if (!SCM_FALSEP (used_by
))
1587 SCM methods
= SCM_SLOT (gf
, scm_si_methods
);
1588 for (; SCM_CONSP (used_by
); used_by
= SCM_CDR (used_by
))
1589 scm_sys_invalidate_method_cache_x (SCM_CAR (used_by
));
1590 clear_method_cache (gf
);
1591 for (; SCM_CONSP (methods
); methods
= SCM_CDR (methods
))
1592 SCM_SET_SLOT (SCM_CAR (methods
), scm_si_code_table
, SCM_EOL
);
1595 SCM n
= SCM_SLOT (gf
, scm_si_n_specialized
);
1596 /* The sign of n is a flag indicating rest args. */
1597 SCM_SET_MCACHE_N_SPECIALIZED (SCM_ENTITY_PROCEDURE (gf
), n
);
1599 return SCM_UNSPECIFIED
;
1603 SCM_DEFINE (scm_generic_capability_p
, "generic-capability?", 1, 0, 0,
1606 #define FUNC_NAME s_scm_generic_capability_p
1608 SCM_ASSERT (!SCM_FALSEP (scm_procedure_p (proc
)),
1609 proc
, SCM_ARG1
, FUNC_NAME
);
1610 return (scm_subr_p (proc
) && SCM_SUBR_GENERIC (proc
)
1616 SCM_DEFINE (scm_enable_primitive_generic_x
, "enable-primitive-generic!", 0, 0, 1,
1619 #define FUNC_NAME s_scm_enable_primitive_generic_x
1621 SCM_VALIDATE_REST_ARGUMENT (subrs
);
1622 while (!SCM_NULLP (subrs
))
1624 SCM subr
= SCM_CAR (subrs
);
1625 SCM_ASSERT (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
),
1626 subr
, SCM_ARGn
, FUNC_NAME
);
1627 *SCM_SUBR_GENERIC (subr
)
1628 = scm_make (scm_list_3 (scm_class_generic
,
1631 subrs
= SCM_CDR (subrs
);
1633 return SCM_UNSPECIFIED
;
1637 SCM_DEFINE (scm_primitive_generic_generic
, "primitive-generic-generic", 1, 0, 0,
1640 #define FUNC_NAME s_scm_primitive_generic_generic
1642 if (scm_subr_p (subr
) && SCM_SUBR_GENERIC (subr
))
1644 SCM gf
= *SCM_SUBR_GENERIC (subr
);
1648 SCM_WRONG_TYPE_ARG (SCM_ARG1
, subr
);
1652 /******************************************************************************
1654 * Protocol for calling a generic fumction
1655 * This protocol is roughly equivalent to (parameter are a little bit different
1656 * for efficiency reasons):
1658 * + apply-generic (gf args)
1659 * + compute-applicable-methods (gf args ...)
1660 * + sort-applicable-methods (methods args)
1661 * + apply-methods (gf methods args)
1663 * apply-methods calls make-next-method to build the "continuation" of a a
1664 * method. Applying a next-method will call apply-next-method which in
1665 * turn will call apply again to call effectively the following method.
1667 ******************************************************************************/
1670 applicablep (SCM actual
, SCM formal
)
1672 /* We already know that the cpl is well formed. */
1673 return !SCM_FALSEP (scm_c_memq (formal
, SCM_SLOT (actual
, scm_si_cpl
)));
1677 more_specificp (SCM m1
, SCM m2
, SCM
const *targs
)
1679 register SCM s1
, s2
;
1683 * m1 and m2 can have != length (i.e. one can be one element longer than the
1684 * other when we have a dotted parameter list). For instance, with the call
1687 * (define-method M (a . l) ....)
1688 * (define-method M (a) ....)
1690 * we consider that the second method is more specific.
1692 * BTW, targs is an array of types. We don't need it's size since
1693 * we already know that m1 and m2 are applicable (no risk to go past
1694 * the end of this array).
1697 for (i
=0, s1
=SPEC_OF(m1
), s2
=SPEC_OF(m2
); ; i
++, s1
=SCM_CDR(s1
), s2
=SCM_CDR(s2
)) {
1698 if (SCM_NULLP(s1
)) return 1;
1699 if (SCM_NULLP(s2
)) return 0;
1700 if (SCM_CAR(s1
) != SCM_CAR(s2
)) {
1701 register SCM l
, cs1
= SCM_CAR(s1
), cs2
= SCM_CAR(s2
);
1703 for (l
= SCM_SLOT (targs
[i
], scm_si_cpl
); ; l
= SCM_CDR(l
)) {
1704 if (cs1
== SCM_CAR(l
))
1706 if (cs2
== SCM_CAR(l
))
1709 return 0;/* should not occur! */
1712 return 0; /* should not occur! */
1715 #define BUFFSIZE 32 /* big enough for most uses */
1718 scm_i_vector2list (SCM l
, long len
)
1721 SCM z
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1723 for (j
= 0; j
< len
; j
++, l
= SCM_CDR (l
)) {
1724 SCM_VECTOR_SET (z
, j
, SCM_CAR (l
));
1730 sort_applicable_methods (SCM method_list
, long size
, SCM
const *targs
)
1733 SCM
*v
, vector
= SCM_EOL
;
1734 SCM buffer
[BUFFSIZE
];
1735 SCM save
= method_list
;
1737 /* For reasonably sized method_lists we can try to avoid all the
1738 * consing and reorder the list in place...
1739 * This idea is due to David McClain <Dave_McClain@msn.com>
1741 if (size
<= BUFFSIZE
)
1743 for (i
= 0; i
< size
; i
++)
1745 buffer
[i
] = SCM_CAR (method_list
);
1746 method_list
= SCM_CDR (method_list
);
1752 /* Too many elements in method_list to keep everything locally */
1753 vector
= scm_i_vector2list (save
, size
);
1756 This is a new vector. Don't worry about the write barrier.
1757 We're not allocating elements in this routine, so this should
1760 v
= SCM_WRITABLE_VELTS (vector
);
1763 /* Use a simple shell sort since it is generally faster than qsort on
1764 * small vectors (which is probably mostly the case when we have to
1765 * sort a list of applicable methods).
1767 for (incr
= size
/ 2; incr
; incr
/= 2)
1769 for (i
= incr
; i
< size
; i
++)
1771 for (j
= i
- incr
; j
>= 0; j
-= incr
)
1773 if (more_specificp (v
[j
], v
[j
+incr
], targs
))
1777 SCM tmp
= v
[j
+ incr
];
1785 if (size
<= BUFFSIZE
)
1787 /* We did it in locally, so restore the original list (reordered) in-place */
1788 for (i
= 0, method_list
= save
; i
< size
; i
++, v
++)
1790 SCM_SETCAR (method_list
, *v
);
1791 method_list
= SCM_CDR (method_list
);
1795 /* If we are here, that's that we did it the hard way... */
1796 return scm_vector_to_list (vector
);
1800 scm_compute_applicable_methods (SCM gf
, SCM args
, long len
, int find_method_p
)
1804 SCM l
, fl
, applicable
= SCM_EOL
;
1806 SCM buffer
[BUFFSIZE
];
1811 /* Build the list of arguments types */
1812 if (len
>= BUFFSIZE
) {
1813 tmp
= scm_c_make_vector (len
, SCM_UNDEFINED
);
1814 /* NOTE: Using pointers to malloced memory won't work if we
1815 1. have preemtive threading, and,
1816 2. have a GC which moves objects. */
1817 types
= p
= SCM_WRITABLE_VELTS(tmp
);
1820 note that we don't have to work to reset the generation
1821 count. TMP is a new vector anyway, and it is found
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 */
1865 scm_remember_upto_here_1 (tmp
);
1868 : sort_applicable_methods (applicable
, count
, types
));
1872 SCM_PROC (s_sys_compute_applicable_methods
, "%compute-applicable-methods", 2, 0, 0, scm_sys_compute_applicable_methods
);
1875 static const char s_sys_compute_applicable_methods
[] = "%compute-applicable-methods";
1878 scm_sys_compute_applicable_methods (SCM gf
, SCM args
)
1879 #define FUNC_NAME s_sys_compute_applicable_methods
1882 SCM_VALIDATE_GENERIC (1, gf
);
1883 n
= scm_ilength (args
);
1884 SCM_ASSERT (n
>= 0, args
, SCM_ARG2
, FUNC_NAME
);
1885 return scm_compute_applicable_methods (gf
, args
, n
, 1);
1889 SCM_SYMBOL (sym_compute_applicable_methods
, "compute-applicable-methods");
1890 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
));
1892 SCM_SYNTAX (s_atslot_ref
, "@slot-ref", scm_makmmacro
, scm_m_atslot_ref
);
1895 scm_m_atslot_ref (SCM xorig
, SCM env SCM_UNUSED
)
1896 #define FUNC_NAME s_atslot_ref
1898 SCM x
= SCM_CDR (xorig
);
1899 SCM_ASSYNT (scm_ilength (x
) == 2, scm_s_expression
, FUNC_NAME
);
1900 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1901 return scm_cons (SCM_IM_SLOT_REF
, x
);
1906 SCM_SYNTAX (s_atslot_set_x
, "@slot-set!", scm_makmmacro
, scm_m_atslot_set_x
);
1909 scm_m_atslot_set_x (SCM xorig
, SCM env SCM_UNUSED
)
1910 #define FUNC_NAME s_atslot_set_x
1912 SCM x
= SCM_CDR (xorig
);
1913 SCM_ASSYNT (scm_ilength (x
) == 3, scm_s_expression
, FUNC_NAME
);
1914 SCM_VALIDATE_INUM (SCM_ARG2
, SCM_CADR (x
));
1915 return scm_cons (SCM_IM_SLOT_SET_X
, x
);
1920 SCM_SYNTAX (s_atdispatch
, "@dispatch", scm_makmmacro
, scm_m_atdispatch
);
1922 SCM_SYMBOL (sym_atdispatch
, s_atdispatch
);
1925 scm_m_atdispatch (SCM xorig
, SCM env
)
1926 #define FUNC_NAME s_atdispatch
1928 SCM args
, n
, v
, gf
, x
= SCM_CDR (xorig
);
1929 SCM_ASSYNT (scm_ilength (x
) == 4, scm_s_expression
, FUNC_NAME
);
1931 if (!SCM_CONSP (args
) && !SCM_SYMBOLP (args
))
1932 SCM_WRONG_TYPE_ARG (SCM_ARG1
, args
);
1934 n
= SCM_XEVALCAR (x
, env
);
1935 SCM_VALIDATE_INUM (SCM_ARG2
, n
);
1936 SCM_ASSERT_RANGE (0, n
, SCM_INUM (n
) >= 1);
1938 v
= SCM_XEVALCAR (x
, env
);
1939 SCM_VALIDATE_VECTOR (SCM_ARG3
, v
);
1941 gf
= SCM_XEVALCAR (x
, env
);
1942 SCM_VALIDATE_PUREGENERIC (SCM_ARG4
, gf
);
1943 return scm_list_5 (SCM_IM_DISPATCH
, args
, n
, v
, gf
);
1949 lock_cache_mutex (void *m
)
1951 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
1952 scm_lock_mutex (mutex
);
1956 unlock_cache_mutex (void *m
)
1958 SCM mutex
= SCM_PACK ((scm_t_bits
) m
);
1959 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
));
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
)));
1990 /******************************************************************************
1992 * A simple make (which will be redefined later in Scheme)
1993 * This version handles only creation of gf, methods and classes (no instances)
1995 * Since this code will disappear when Goops will be fully booted,
1996 * no precaution is taken to be efficient.
1998 ******************************************************************************/
2000 SCM_KEYWORD (k_setter
, "setter");
2001 SCM_KEYWORD (k_specializers
, "specializers");
2002 SCM_KEYWORD (k_procedure
, "procedure");
2003 SCM_KEYWORD (k_dsupers
, "dsupers");
2004 SCM_KEYWORD (k_slots
, "slots");
2005 SCM_KEYWORD (k_gf
, "generic-function");
2007 SCM_DEFINE (scm_make
, "make", 0, 0, 1,
2009 "Make a new object. @var{args} must contain the class and\n"
2010 "all necessary initialization information.")
2011 #define FUNC_NAME s_scm_make
2014 long len
= scm_ilength (args
);
2016 if (len
<= 0 || (len
& 1) == 0)
2017 SCM_WRONG_NUM_ARGS ();
2019 class = SCM_CAR(args
);
2020 args
= SCM_CDR(args
);
2022 if (class == scm_class_generic
|| class == scm_class_generic_with_setter
)
2024 z
= scm_make_struct (class, SCM_INUM0
,
2025 scm_list_4 (SCM_EOL
,
2028 scm_make_mutex ()));
2029 scm_set_procedure_property_x (z
, scm_sym_name
,
2030 scm_get_keyword (k_name
,
2033 clear_method_cache (z
);
2034 if (class == scm_class_generic_with_setter
)
2036 SCM setter
= scm_get_keyword (k_setter
, args
, SCM_BOOL_F
);
2037 if (!SCM_FALSEP (setter
))
2038 scm_sys_set_object_setter_x (z
, setter
);
2043 z
= scm_sys_allocate_instance (class, args
);
2045 if (class == scm_class_method
2046 || class == scm_class_simple_method
2047 || class == scm_class_accessor
)
2049 SCM_SET_SLOT (z
, scm_si_generic_function
,
2050 scm_i_get_keyword (k_gf
,
2055 SCM_SET_SLOT (z
, scm_si_specializers
,
2056 scm_i_get_keyword (k_specializers
,
2061 SCM_SET_SLOT (z
, scm_si_procedure
,
2062 scm_i_get_keyword (k_procedure
,
2067 SCM_SET_SLOT (z
, scm_si_code_table
, SCM_EOL
);
2071 /* In all the others case, make a new class .... No instance here */
2072 SCM_SET_SLOT (z
, scm_si_name
,
2073 scm_i_get_keyword (k_name
,
2076 scm_str2symbol ("???"),
2078 SCM_SET_SLOT (z
, scm_si_direct_supers
,
2079 scm_i_get_keyword (k_dsupers
,
2084 SCM_SET_SLOT (z
, scm_si_direct_slots
,
2085 scm_i_get_keyword (k_slots
,
2096 SCM_DEFINE (scm_find_method
, "find-method", 0, 0, 1,
2099 #define FUNC_NAME s_scm_find_method
2102 long len
= scm_ilength (l
);
2105 SCM_WRONG_NUM_ARGS ();
2107 gf
= SCM_CAR(l
); l
= SCM_CDR(l
);
2108 SCM_VALIDATE_GENERIC (1, gf
);
2109 if (SCM_NULLP (SCM_SLOT (gf
, scm_si_methods
)))
2110 SCM_MISC_ERROR ("no methods for generic ~S", scm_list_1 (gf
));
2112 return scm_compute_applicable_methods (gf
, l
, len
- 1, 1);
2116 SCM_DEFINE (scm_sys_method_more_specific_p
, "%method-more-specific?", 3, 0, 0,
2117 (SCM m1
, SCM m2
, SCM targs
),
2119 #define FUNC_NAME s_scm_sys_method_more_specific_p
2124 SCM_VALIDATE_METHOD (1, m1
);
2125 SCM_VALIDATE_METHOD (2, m2
);
2126 SCM_ASSERT ((len
= scm_ilength (targs
)) != -1, targs
, SCM_ARG3
, FUNC_NAME
);
2128 /* Verify that all the arguments of targs are classes and place them in a vector*/
2129 v
= scm_c_make_vector (len
, SCM_EOL
);
2131 for (i
= 0, l
= targs
; !SCM_NULLP (l
); i
++, l
= SCM_CDR (l
)) {
2132 SCM_ASSERT (SCM_CLASSP (SCM_CAR (l
)), targs
, SCM_ARG3
, FUNC_NAME
);
2133 SCM_VECTOR_SET (v
, i
, SCM_CAR(l
));
2135 return more_specificp (m1
, m2
, SCM_VELTS(v
)) ? SCM_BOOL_T
: SCM_BOOL_F
;
2141 /******************************************************************************
2145 ******************************************************************************/
2149 make_stdcls (SCM
*var
, char *name
, SCM meta
, SCM super
, SCM slots
)
2151 SCM tmp
= scm_str2symbol (name
);
2153 *var
= scm_permanent_object (scm_basic_make_class (meta
,
2157 : scm_list_1 (super
),
2163 SCM_KEYWORD (k_slot_definition
, "slot-definition");
2166 create_standard_classes (void)
2169 SCM method_slots
= scm_list_4 (scm_str2symbol ("generic-function"),
2170 scm_str2symbol ("specializers"),
2172 scm_str2symbol ("code-table"));
2173 SCM amethod_slots
= scm_list_1 (scm_list_3 (scm_str2symbol ("slot-definition"),
2175 k_slot_definition
));
2176 SCM mutex_slot
= scm_list_1 (scm_str2symbol ("make-mutex"));
2177 SCM gf_slots
= scm_list_4 (scm_str2symbol ("methods"),
2178 scm_list_3 (scm_str2symbol ("n-specialized"),
2181 scm_list_3 (scm_str2symbol ("used-by"),
2184 scm_list_3 (scm_str2symbol ("cache-mutex"),
2186 scm_closure (scm_list_2 (SCM_EOL
,
2190 /* Foreign class slot classes */
2191 make_stdcls (&scm_class_foreign_slot
, "<foreign-slot>",
2192 scm_class_class
, scm_class_top
, SCM_EOL
);
2193 make_stdcls (&scm_class_protected
, "<protected-slot>",
2194 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2195 make_stdcls (&scm_class_opaque
, "<opaque-slot>",
2196 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2197 make_stdcls (&scm_class_read_only
, "<read-only-slot>",
2198 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2199 make_stdcls (&scm_class_self
, "<self-slot>",
2201 scm_list_2 (scm_class_foreign_slot
, scm_class_read_only
),
2203 make_stdcls (&scm_class_protected_opaque
, "<protected-opaque-slot>",
2205 scm_list_2 (scm_class_protected
, scm_class_opaque
),
2207 make_stdcls (&scm_class_protected_read_only
, "<protected-read-only-slot>",
2209 scm_list_2 (scm_class_protected
, scm_class_read_only
),
2211 make_stdcls (&scm_class_scm
, "<scm-slot>",
2212 scm_class_class
, scm_class_protected
, SCM_EOL
);
2213 make_stdcls (&scm_class_int
, "<int-slot>",
2214 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2215 make_stdcls (&scm_class_float
, "<float-slot>",
2216 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2217 make_stdcls (&scm_class_double
, "<double-slot>",
2218 scm_class_class
, scm_class_foreign_slot
, SCM_EOL
);
2220 /* Continue initialization of class <class> */
2222 slots
= build_class_class_slots ();
2223 SCM_SET_SLOT (scm_class_class
, scm_si_direct_slots
, slots
);
2224 SCM_SET_SLOT (scm_class_class
, scm_si_slots
, slots
);
2225 SCM_SET_SLOT (scm_class_class
, scm_si_getters_n_setters
,
2226 compute_getters_n_setters (slots
));
2228 make_stdcls (&scm_class_foreign_class
, "<foreign-class>",
2229 scm_class_class
, scm_class_class
,
2230 scm_list_2 (scm_list_3 (scm_str2symbol ("constructor"),
2233 scm_list_3 (scm_str2symbol ("destructor"),
2235 scm_class_opaque
)));
2236 make_stdcls (&scm_class_foreign_object
, "<foreign-object>",
2237 scm_class_foreign_class
, scm_class_object
, SCM_EOL
);
2238 SCM_SET_CLASS_FLAGS (scm_class_foreign_object
, SCM_CLASSF_FOREIGN
);
2240 /* scm_class_generic functions classes */
2241 make_stdcls (&scm_class_procedure_class
, "<procedure-class>",
2242 scm_class_class
, scm_class_class
, SCM_EOL
);
2243 make_stdcls (&scm_class_entity_class
, "<entity-class>",
2244 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2245 make_stdcls (&scm_class_operator_class
, "<operator-class>",
2246 scm_class_class
, scm_class_procedure_class
, SCM_EOL
);
2247 make_stdcls (&scm_class_operator_with_setter_class
,
2248 "<operator-with-setter-class>",
2249 scm_class_class
, scm_class_operator_class
, SCM_EOL
);
2250 make_stdcls (&scm_class_method
, "<method>",
2251 scm_class_class
, scm_class_object
, method_slots
);
2252 make_stdcls (&scm_class_simple_method
, "<simple-method>",
2253 scm_class_class
, scm_class_method
, SCM_EOL
);
2254 SCM_SET_CLASS_FLAGS (scm_class_simple_method
, SCM_CLASSF_SIMPLE_METHOD
);
2255 make_stdcls (&scm_class_accessor
, "<accessor-method>",
2256 scm_class_class
, scm_class_simple_method
, amethod_slots
);
2257 SCM_SET_CLASS_FLAGS (scm_class_accessor
, SCM_CLASSF_ACCESSOR_METHOD
);
2258 make_stdcls (&scm_class_entity
, "<entity>",
2259 scm_class_entity_class
, scm_class_object
, SCM_EOL
);
2260 make_stdcls (&scm_class_entity_with_setter
, "<entity-with-setter>",
2261 scm_class_entity_class
, scm_class_entity
, SCM_EOL
);
2262 make_stdcls (&scm_class_generic
, "<generic>",
2263 scm_class_entity_class
, scm_class_entity
, gf_slots
);
2264 SCM_SET_CLASS_FLAGS (scm_class_generic
, SCM_CLASSF_PURE_GENERIC
);
2265 make_stdcls (&scm_class_generic_with_setter
, "<generic-with-setter>",
2266 scm_class_entity_class
,
2267 scm_list_2 (scm_class_generic
, scm_class_entity_with_setter
),
2270 /* Patch cpl since compute_cpl doesn't support multiple inheritance. */
2271 SCM_SET_SLOT (scm_class_generic_with_setter
, scm_si_cpl
,
2272 scm_append (scm_list_3 (scm_list_2 (scm_class_generic_with_setter
,
2274 SCM_SLOT (scm_class_entity_with_setter
,
2278 SCM_SET_CLASS_FLAGS (scm_class_generic_with_setter
, SCM_CLASSF_PURE_GENERIC
);
2280 /* Primitive types classes */
2281 make_stdcls (&scm_class_boolean
, "<boolean>",
2282 scm_class_class
, scm_class_top
, SCM_EOL
);
2283 make_stdcls (&scm_class_char
, "<char>",
2284 scm_class_class
, scm_class_top
, SCM_EOL
);
2285 make_stdcls (&scm_class_list
, "<list>",
2286 scm_class_class
, scm_class_top
, SCM_EOL
);
2287 make_stdcls (&scm_class_pair
, "<pair>",
2288 scm_class_class
, scm_class_list
, SCM_EOL
);
2289 make_stdcls (&scm_class_null
, "<null>",
2290 scm_class_class
, scm_class_list
, SCM_EOL
);
2291 make_stdcls (&scm_class_string
, "<string>",
2292 scm_class_class
, scm_class_top
, SCM_EOL
);
2293 make_stdcls (&scm_class_symbol
, "<symbol>",
2294 scm_class_class
, scm_class_top
, SCM_EOL
);
2295 make_stdcls (&scm_class_vector
, "<vector>",
2296 scm_class_class
, scm_class_top
, SCM_EOL
);
2297 make_stdcls (&scm_class_number
, "<number>",
2298 scm_class_class
, scm_class_top
, SCM_EOL
);
2299 make_stdcls (&scm_class_complex
, "<complex>",
2300 scm_class_class
, scm_class_number
, SCM_EOL
);
2301 make_stdcls (&scm_class_real
, "<real>",
2302 scm_class_class
, scm_class_complex
, SCM_EOL
);
2303 make_stdcls (&scm_class_integer
, "<integer>",
2304 scm_class_class
, scm_class_real
, SCM_EOL
);
2305 make_stdcls (&scm_class_keyword
, "<keyword>",
2306 scm_class_class
, scm_class_top
, SCM_EOL
);
2307 make_stdcls (&scm_class_unknown
, "<unknown>",
2308 scm_class_class
, scm_class_top
, SCM_EOL
);
2309 make_stdcls (&scm_class_procedure
, "<procedure>",
2310 scm_class_procedure_class
, scm_class_top
, SCM_EOL
);
2311 make_stdcls (&scm_class_procedure_with_setter
, "<procedure-with-setter>",
2312 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2313 make_stdcls (&scm_class_primitive_generic
, "<primitive-generic>",
2314 scm_class_procedure_class
, scm_class_procedure
, SCM_EOL
);
2315 make_stdcls (&scm_class_port
, "<port>",
2316 scm_class_class
, scm_class_top
, SCM_EOL
);
2317 make_stdcls (&scm_class_input_port
, "<input-port>",
2318 scm_class_class
, scm_class_port
, SCM_EOL
);
2319 make_stdcls (&scm_class_output_port
, "<output-port>",
2320 scm_class_class
, scm_class_port
, SCM_EOL
);
2321 make_stdcls (&scm_class_input_output_port
, "<input-output-port>",
2323 scm_list_2 (scm_class_input_port
, scm_class_output_port
),
2327 /**********************************************************************
2331 **********************************************************************/
2334 make_class_from_template (char *template, char *type_name
, SCM supers
)
2340 sprintf (buffer
, template, type_name
);
2341 name
= scm_str2symbol (buffer
);
2344 name
= SCM_GOOPS_UNBOUND
;
2346 class = scm_permanent_object (scm_basic_make_class (scm_class_class
,
2351 /* Only define name if doesn't already exist. */
2352 if (!SCM_GOOPS_UNBOUNDP (name
)
2353 && SCM_FALSEP (scm_call_2 (scm_goops_lookup_closure
, name
, SCM_BOOL_F
)))
2354 DEFVAR (name
, class);
2359 scm_make_extended_class (char *type_name
)
2361 return make_class_from_template ("<%s>",
2363 scm_list_1 (scm_class_top
));
2367 create_smob_classes (void)
2371 scm_smob_class
= (SCM
*) scm_malloc (255 * sizeof (SCM
));
2372 for (i
= 0; i
< 255; ++i
)
2373 scm_smob_class
[i
] = 0;
2375 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_big
)] = scm_class_integer
;
2376 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_real
)] = scm_class_real
;
2377 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_complex
)] = scm_class_complex
;
2378 scm_smob_class
[SCM_TC2SMOBNUM (scm_tc16_keyword
)] = scm_class_keyword
;
2380 for (i
= 0; i
< scm_numsmob
; ++i
)
2381 if (!scm_smob_class
[i
])
2382 scm_smob_class
[i
] = scm_make_extended_class (SCM_SMOBNAME (i
));
2386 scm_make_port_classes (long ptobnum
, char *type_name
)
2388 SCM c
, class = make_class_from_template ("<%s-port>",
2390 scm_list_1 (scm_class_port
));
2391 scm_port_class
[SCM_IN_PCLASS_INDEX
+ ptobnum
]
2392 = make_class_from_template ("<%s-input-port>",
2394 scm_list_2 (class, scm_class_input_port
));
2395 scm_port_class
[SCM_OUT_PCLASS_INDEX
+ ptobnum
]
2396 = make_class_from_template ("<%s-output-port>",
2398 scm_list_2 (class, scm_class_output_port
));
2399 scm_port_class
[SCM_INOUT_PCLASS_INDEX
+ ptobnum
]
2401 = make_class_from_template ("<%s-input-output-port>",
2403 scm_list_2 (class, scm_class_input_output_port
));
2404 /* Patch cpl (since this tree is too complex for the C level compute-cpl) */
2405 SCM_SET_SLOT (c
, scm_si_cpl
,
2406 scm_cons2 (c
, class, SCM_SLOT (scm_class_input_output_port
, scm_si_cpl
)));
2410 create_port_classes (void)
2414 scm_port_class
= (SCM
*) scm_malloc (3 * 256 * sizeof (SCM
));
2415 for (i
= 0; i
< 3 * 256; ++i
)
2416 scm_port_class
[i
] = 0;
2418 for (i
= 0; i
< scm_numptob
; ++i
)
2419 scm_make_port_classes (i
, SCM_PTOBNAME (i
));
2423 make_struct_class (void *closure SCM_UNUSED
, SCM key SCM_UNUSED
,
2424 SCM data
, SCM prev SCM_UNUSED
)
2426 if (!SCM_FALSEP (SCM_STRUCT_TABLE_NAME (data
)))
2427 SCM_SET_STRUCT_TABLE_CLASS (data
,
2428 scm_make_extended_class
2429 (SCM_SYMBOL_CHARS (SCM_STRUCT_TABLE_NAME (data
))));
2430 return SCM_UNSPECIFIED
;
2434 create_struct_classes (void)
2436 scm_internal_hash_fold (make_struct_class
, 0, SCM_BOOL_F
, scm_struct_table
);
2439 /**********************************************************************
2443 **********************************************************************/
2448 if (!goops_loaded_p
)
2449 scm_c_resolve_module ("oop goops");
2454 scm_make_foreign_object (SCM
class, SCM initargs
)
2455 #define FUNC_NAME s_scm_make
2457 void * (*constructor
) (SCM
)
2458 = (void * (*) (SCM
)) SCM_SLOT (class, scm_si_constructor
);
2459 if (constructor
== 0)
2460 SCM_MISC_ERROR ("Can't make instances of class ~S", scm_list_1 (class));
2461 return scm_wrap_object (class, constructor (initargs
));
2467 scm_free_foreign_object (SCM
*class, SCM
*data
)
2469 size_t (*destructor
) (void *)
2470 = (size_t (*) (void *)) class[scm_si_destructor
];
2471 return destructor (data
);
2475 scm_make_class (SCM meta
, char *s_name
, SCM supers
, size_t size
,
2476 void * (*constructor
) (SCM initargs
),
2477 size_t (*destructor
) (void *))
2480 name
= scm_str2symbol (s_name
);
2481 if (SCM_NULLP (supers
))
2482 supers
= scm_list_1 (scm_class_foreign_object
);
2483 class = scm_basic_basic_make_class (meta
, name
, supers
, SCM_EOL
);
2484 scm_sys_inherit_magic_x (class, supers
);
2486 if (destructor
!= 0)
2488 SCM_SET_SLOT (class, scm_si_destructor
, (SCM
) destructor
);
2489 SCM_SET_CLASS_DESTRUCTOR (class, scm_free_foreign_object
);
2493 SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light
);
2494 SCM_SET_CLASS_INSTANCE_SIZE (class, size
);
2497 SCM_SET_SLOT (class, scm_si_layout
, scm_str2symbol (""));
2498 SCM_SET_SLOT (class, scm_si_constructor
, (SCM
) constructor
);
2503 SCM_SYMBOL (sym_o
, "o");
2504 SCM_SYMBOL (sym_x
, "x");
2506 SCM_KEYWORD (k_accessor
, "accessor");
2507 SCM_KEYWORD (k_getter
, "getter");
2510 default_setter (SCM obj SCM_UNUSED
, SCM c SCM_UNUSED
)
2512 scm_misc_error ("slot-set!", "read-only slot", SCM_EOL
);
2517 scm_add_slot (SCM
class, char *slot_name
, SCM slot_class
,
2518 SCM (*getter
) (SCM obj
),
2519 SCM (*setter
) (SCM obj
, SCM x
),
2520 char *accessor_name
)
2523 SCM get
= scm_c_make_subr ("goops:get", scm_tc7_subr_1
, getter
);
2524 SCM set
= scm_c_make_subr ("goops:set", scm_tc7_subr_2
,
2525 setter
? setter
: default_setter
);
2526 SCM getm
= scm_closure (scm_list_2 (scm_list_1 (sym_o
),
2527 scm_list_2 (get
, sym_o
)),
2529 SCM setm
= scm_closure (scm_list_2 (scm_list_2 (sym_o
, sym_x
),
2530 scm_list_3 (set
, sym_o
, sym_x
)),
2533 SCM name
= scm_str2symbol (slot_name
);
2534 SCM aname
= scm_str2symbol (accessor_name
);
2535 SCM gf
= scm_ensure_accessor (aname
);
2536 SCM slot
= scm_list_5 (name
,
2539 setter
? k_accessor
: k_getter
,
2541 SCM gns
= scm_list_4 (name
, SCM_BOOL_F
, get
, set
);
2543 scm_add_method (gf
, scm_make (scm_list_5 (scm_class_accessor
,
2548 scm_add_method (scm_setter (gf
),
2549 scm_make (scm_list_5 (scm_class_accessor
,
2551 scm_list_2 (class, scm_class_top
),
2556 SCM_SET_SLOT (class, scm_si_slots
,
2557 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_slots
),
2558 scm_list_1 (slot
))));
2559 SCM_SET_SLOT (class, scm_si_getters_n_setters
,
2560 scm_append_x (scm_list_2 (SCM_SLOT (class, scm_si_getters_n_setters
),
2561 scm_list_1 (gns
))));
2565 long n
= SCM_INUM (SCM_SLOT (class, scm_si_nfields
));
2567 SCM_SET_SLOT (class, scm_si_nfields
, SCM_MAKINUM (n
+ 1));
2572 scm_wrap_object (SCM
class, void *data
)
2574 return scm_double_cell (SCM_UNPACK (SCM_CDR (class)) | scm_tc3_struct
,
2582 scm_wrap_component (SCM
class, SCM container
, void *data
)
2584 SCM obj
= scm_wrap_object (class, data
);
2585 SCM handle
= scm_hash_fn_create_handle_x (scm_components
,
2591 SCM_SETCDR (handle
, container
);
2596 scm_ensure_accessor (SCM name
)
2598 SCM gf
= scm_call_2 (SCM_TOP_LEVEL_LOOKUP_CLOSURE
, name
, SCM_BOOL_F
);
2599 if (!SCM_IS_A_P (gf
, scm_class_generic_with_setter
))
2601 gf
= scm_make (scm_list_3 (scm_class_generic
, k_name
, name
));
2602 gf
= scm_make (scm_list_5 (scm_class_generic_with_setter
,
2603 k_name
, name
, k_setter
, gf
));
2608 SCM_SYMBOL (sym_internal_add_method_x
, "internal-add-method!");
2611 scm_add_method (SCM gf
, SCM m
)
2613 scm_eval (scm_list_3 (sym_internal_add_method_x
, gf
, m
), scm_module_goops
);
2618 * Debugging utilities
2621 SCM_DEFINE (scm_pure_generic_p
, "pure-generic?", 1, 0, 0,
2623 "Return @code{#t} if @var{obj} is a pure generic.")
2624 #define FUNC_NAME s_scm_pure_generic_p
2626 return SCM_BOOL (SCM_PUREGENERICP (obj
));
2630 #endif /* GUILE_DEBUG */
2636 SCM_DEFINE (scm_sys_goops_loaded
, "%goops-loaded", 0, 0, 0,
2638 "Announce that GOOPS is loaded and perform initialization\n"
2639 "on the C level which depends on the loaded GOOPS modules.")
2640 #define FUNC_NAME s_scm_sys_goops_loaded
2643 var_compute_applicable_methods
=
2644 scm_sym2var (sym_compute_applicable_methods
, scm_goops_lookup_closure
,
2646 return SCM_UNSPECIFIED
;
2650 SCM scm_module_goops
;
2653 scm_init_goops_builtins (void)
2655 scm_module_goops
= scm_current_module ();
2656 scm_goops_lookup_closure
= scm_module_lookup_closure (scm_module_goops
);
2658 /* Not really necessary right now, but who knows...
2660 scm_permanent_object (scm_module_goops
);
2661 scm_permanent_object (scm_goops_lookup_closure
);
2663 scm_components
= scm_permanent_object (scm_make_weak_key_hash_table
2664 (SCM_MAKINUM (37)));
2666 goops_rstate
= scm_c_make_rstate ("GOOPS", 5);
2668 #include "libguile/goops.x"
2670 list_of_no_method
= scm_permanent_object (scm_list_1 (sym_no_method
));
2672 hell
= scm_malloc (hell_size
);
2673 hell_mutex
= scm_permanent_object (scm_make_mutex ());
2675 create_basic_classes ();
2676 create_standard_classes ();
2677 create_smob_classes ();
2678 create_struct_classes ();
2679 create_port_classes ();
2682 SCM name
= scm_str2symbol ("no-applicable-method");
2683 scm_no_applicable_method
2684 = scm_permanent_object (scm_make (scm_list_3 (scm_class_generic
,
2687 DEFVAR (name
, scm_no_applicable_method
);
2690 return SCM_UNSPECIFIED
;
2696 scm_c_define_gsubr ("%init-goops-builtins", 0, 0, 0,
2697 scm_init_goops_builtins
);