| 1 | /* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc. |
| 2 | * |
| 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) |
| 6 | * any later version. |
| 7 | * |
| 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. |
| 12 | * |
| 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 |
| 17 | * |
| 18 | * As a special exception, the Free Software Foundation gives permission |
| 19 | * for additional uses of the text contained in its release of GUILE. |
| 20 | * |
| 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. |
| 26 | * |
| 27 | * This exception does not however invalidate any other reasons why |
| 28 | * the executable file might be covered by the GNU General Public License. |
| 29 | * |
| 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. |
| 37 | * |
| 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. */ |
| 41 | \f |
| 42 | |
| 43 | /* This software is a derivative work of other copyrighted softwares; the |
| 44 | * copyright notices of these softwares are placed in the file COPYRIGHTS |
| 45 | * |
| 46 | * This file is based upon stklos.c from the STk distribution by |
| 47 | * Erick Gallesio <eg@unice.fr>. |
| 48 | */ |
| 49 | |
| 50 | #include <stdio.h> |
| 51 | |
| 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/smob.h" |
| 67 | #include "libguile/strings.h" |
| 68 | #include "libguile/strports.h" |
| 69 | #include "libguile/vectors.h" |
| 70 | #include "libguile/weaks.h" |
| 71 | |
| 72 | #include "libguile/validate.h" |
| 73 | #include "libguile/goops.h" |
| 74 | |
| 75 | #define CLASSP(x) (SCM_STRUCTP (x) \ |
| 76 | && SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_METACLASS) |
| 77 | #define GENERICP(x) (SCM_INSTANCEP (x) \ |
| 78 | && SCM_SUBCLASSP (SCM_CLASS_OF (x), scm_class_generic)) |
| 79 | #define METHODP(x) (SCM_INSTANCEP (x) \ |
| 80 | && SCM_SUBCLASSP(SCM_CLASS_OF(x), scm_class_method)) |
| 81 | #define SPEC_OF(x) SCM_SLOT (x, scm_si_specializers) |
| 82 | |
| 83 | |
| 84 | #define DEFVAR(v,val) \ |
| 85 | { scm_i_eval (SCM_LIST3 (scm_sym_define_public, (v), (val)), \ |
| 86 | scm_top_level_env (scm_goops_lookup_closure)); } |
| 87 | /* Temporary hack until we get the new module system */ |
| 88 | /*fixme* Should optimize by keeping track of the variable object itself */ |
| 89 | #define GETVAR(v) (SCM_CDDR (scm_apply (scm_goops_lookup_closure, \ |
| 90 | SCM_LIST2 ((v), SCM_BOOL_F), \ |
| 91 | SCM_EOL))) |
| 92 | static SCM |
| 93 | Intern (const char *s) |
| 94 | { |
| 95 | return SCM_CAR (scm_intern (s, strlen (s))); |
| 96 | } |
| 97 | |
| 98 | /* Fixme: Should use already interned symbols */ |
| 99 | #define CALL_GF1(name,a) (scm_apply (GETVAR (Intern(name)), \ |
| 100 | SCM_LIST1 (a), SCM_EOL)) |
| 101 | #define CALL_GF2(name,a,b) (scm_apply (GETVAR (Intern(name)), \ |
| 102 | SCM_LIST2 (a, b), SCM_EOL)) |
| 103 | #define CALL_GF3(name,a,b,c) (scm_apply (GETVAR (Intern(name)), \ |
| 104 | SCM_LIST3 (a, b, c), SCM_EOL)) |
| 105 | #define CALL_GF4(name,a,b,c,d) (scm_apply (GETVAR (Intern(name)), \ |
| 106 | SCM_LIST4 (a, b, c, d), SCM_EOL)) |
| 107 | |
| 108 | /* Class redefinition protocol: |
| 109 | |
| 110 | A class is represented by a heap header h1 which points to a |
| 111 | malloc:ed memory block m1. |
| 112 | |
| 113 | When a new version of a class is created, a new header h2 and |
| 114 | memory block m2 are allocated. The headers h1 and h2 then switch |
| 115 | pointers so that h1 refers to m2 and h2 to m1. In this way, names |
| 116 | bound to h1 will point to the new class at the same time as h2 will |
| 117 | be a handle which the GC will us to free m1. |
| 118 | |
| 119 | The `redefined' slot of m1 will be set to point to h1. An old |
| 120 | instance will have it's class pointer (the CAR of the heap header) |
| 121 | pointing to m1. The non-immediate `redefined'-slot in m1 indicates |
| 122 | the class modification and the new class pointer can be found via |
| 123 | h1. |
| 124 | */ |
| 125 | |
| 126 | #define SCM_CLASS_REDEF(c) SCM_SLOT (c, scm_si_redefined) |
| 127 | /* The following definition is located in libguile/objects.h: |
| 128 | #define SCM_OBJ_CLASS_REDEF(x) (SCM_STRUCT_VTABLE_DATA(x)[scm_si_redefined]) |
| 129 | */ |
| 130 | |
| 131 | #define TEST_CHANGE_CLASS(obj, class) \ |
| 132 | { \ |
| 133 | class = SCM_CLASS_OF (obj); \ |
| 134 | if (SCM_OBJ_CLASS_REDEF (obj) != SCM_BOOL_F) \ |
| 135 | CALL_GF3 ("change-object-class", \ |
| 136 | obj, class, SCM_OBJ_CLASS_REDEF (obj)); \ |
| 137 | } |
| 138 | |
| 139 | #define NXT_MTHD_METHODS(m) (SCM_VELTS (m)[1]) |
| 140 | #define NXT_MTHD_ARGS(m) (SCM_VELTS (m)[2]) |
| 141 | |
| 142 | #define SCM_GOOPS_UNBOUND SCM_UNBOUND |
| 143 | #define SCM_GOOPS_UNBOUNDP(x) ((x) == SCM_GOOPS_UNBOUND) |
| 144 | |
| 145 | static int goops_loaded_p = 0; |
| 146 | static scm_rstate *goops_rstate; |
| 147 | |
| 148 | static SCM scm_goops_lookup_closure; |
| 149 | |
| 150 | /* Some classes are defined in libguile/objects.c. */ |
| 151 | SCM scm_class_top, scm_class_object, scm_class_class; |
| 152 | SCM scm_class_entity, scm_class_entity_with_setter; |
| 153 | SCM scm_class_generic, scm_class_generic_with_setter, scm_class_method; |
| 154 | SCM scm_class_simple_method, scm_class_accessor; |
| 155 | SCM scm_class_procedure_class; |
| 156 | SCM scm_class_operator_class, scm_class_operator_with_setter_class; |
| 157 | SCM scm_class_entity_class; |
| 158 | SCM scm_class_number, scm_class_list; |
| 159 | SCM scm_class_keyword; |
| 160 | SCM scm_class_port, scm_class_input_output_port; |
| 161 | SCM scm_class_input_port, scm_class_output_port; |
| 162 | SCM scm_class_foreign_class, scm_class_foreign_object; |
| 163 | SCM scm_class_foreign_slot; |
| 164 | SCM scm_class_self, scm_class_protected; |
| 165 | SCM scm_class_opaque, scm_class_read_only; |
| 166 | SCM scm_class_protected_opaque, scm_class_protected_read_only; |
| 167 | SCM scm_class_scm; |
| 168 | SCM scm_class_int, scm_class_float, scm_class_double; |
| 169 | |
| 170 | SCM_SYMBOL (scm_sym_define_public, "define-public"); |
| 171 | |
| 172 | static SCM scm_make_unbound (void); |
| 173 | static SCM scm_unbound_p (SCM obj); |
| 174 | |
| 175 | /****************************************************************************** |
| 176 | * |
| 177 | * Compute-cpl |
| 178 | * |
| 179 | * This version doesn't handle multiple-inheritance. It serves only for |
| 180 | * booting classes and will be overaloaded in Scheme |
| 181 | * |
| 182 | ******************************************************************************/ |
| 183 | |
| 184 | #if 0 |
| 185 | static SCM |
| 186 | compute_cpl (SCM supers, SCM res) |
| 187 | { |
| 188 | return (SCM_NULLP (supers) |
| 189 | ? scm_reverse (res) |
| 190 | : compute_cpl (SCM_SLOT (SCM_CAR (supers), scm_si_direct_supers), |
| 191 | scm_cons (SCM_CAR (supers), res))); |
| 192 | } |
| 193 | #endif |
| 194 | |
| 195 | static SCM |
| 196 | map (SCM (*proc) (SCM), SCM ls) |
| 197 | { |
| 198 | if (SCM_IMP (ls)) |
| 199 | return ls; |
| 200 | { |
| 201 | SCM res = scm_cons (proc (SCM_CAR (ls)), SCM_EOL); |
| 202 | SCM h = res; |
| 203 | ls = SCM_CDR (ls); |
| 204 | while (SCM_NIMP (ls)) |
| 205 | { |
| 206 | SCM_SETCDR (h, scm_cons (proc (SCM_CAR (ls)), SCM_EOL)); |
| 207 | h = SCM_CDR (h); |
| 208 | ls = SCM_CDR (ls); |
| 209 | } |
| 210 | return res; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | static SCM |
| 215 | filter_cpl (SCM ls) |
| 216 | { |
| 217 | SCM res = SCM_EOL; |
| 218 | while (SCM_NIMP (ls)) |
| 219 | { |
| 220 | SCM el = SCM_CAR (ls); |
| 221 | if (SCM_FALSEP (scm_memq (el, res))) |
| 222 | res = scm_cons (el, res); |
| 223 | ls = SCM_CDR (ls); |
| 224 | } |
| 225 | return res; |
| 226 | } |
| 227 | |
| 228 | static SCM |
| 229 | compute_cpl (SCM class) |
| 230 | { |
| 231 | if (goops_loaded_p) |
| 232 | return CALL_GF1 ("compute-cpl", class); |
| 233 | else |
| 234 | { |
| 235 | SCM supers = SCM_SLOT (class, scm_si_direct_supers); |
| 236 | SCM ls = scm_append (scm_acons (class, supers, |
| 237 | map (compute_cpl, supers))); |
| 238 | return scm_reverse_x (filter_cpl (ls), SCM_EOL); |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | /****************************************************************************** |
| 243 | * |
| 244 | * compute-slots |
| 245 | * |
| 246 | ******************************************************************************/ |
| 247 | |
| 248 | static SCM |
| 249 | remove_duplicate_slots (SCM l, SCM res, SCM slots_already_seen) |
| 250 | { |
| 251 | SCM tmp; |
| 252 | |
| 253 | if (SCM_NULLP (l)) |
| 254 | return res; |
| 255 | |
| 256 | tmp = SCM_CAAR (l); |
| 257 | if (!(SCM_NIMP (tmp) && SCM_SYMBOLP (tmp))) |
| 258 | scm_misc_error ("%compute-slots", |
| 259 | "bad slot name ~S", |
| 260 | SCM_LIST1 (tmp)); |
| 261 | |
| 262 | if (SCM_FALSEP (scm_memq (tmp, slots_already_seen))) { |
| 263 | res = scm_cons (SCM_CAR (l), res); |
| 264 | slots_already_seen = scm_cons (tmp, slots_already_seen); |
| 265 | } |
| 266 | |
| 267 | return remove_duplicate_slots (SCM_CDR (l), res, slots_already_seen); |
| 268 | } |
| 269 | |
| 270 | static SCM |
| 271 | build_slots_list (SCM dslots, SCM cpl) |
| 272 | { |
| 273 | register SCM res = dslots; |
| 274 | |
| 275 | for (cpl = SCM_CDR(cpl); SCM_NNULLP(cpl); cpl = SCM_CDR(cpl)) |
| 276 | res = scm_append (SCM_LIST2 (SCM_SLOT (SCM_CAR (cpl), scm_si_direct_slots), |
| 277 | res)); |
| 278 | |
| 279 | /* res contains a list of slots. Remove slots which appears more than once */ |
| 280 | return remove_duplicate_slots (scm_reverse (res), SCM_EOL, SCM_EOL); |
| 281 | } |
| 282 | |
| 283 | static SCM |
| 284 | maplist (SCM ls) |
| 285 | { |
| 286 | SCM orig = ls; |
| 287 | while (SCM_NIMP (ls)) |
| 288 | { |
| 289 | if (!(SCM_NIMP (SCM_CAR (ls)) && SCM_CONSP (SCM_CAR (ls)))) |
| 290 | SCM_SETCAR (ls, scm_cons (SCM_CAR (ls), SCM_EOL)); |
| 291 | ls = SCM_CDR (ls); |
| 292 | } |
| 293 | return orig; |
| 294 | } |
| 295 | |
| 296 | |
| 297 | SCM_DEFINE (scm_sys_compute_slots, "%compute-slots", 1, 0, 0, |
| 298 | (SCM class), |
| 299 | "Return a list consisting of the names of all slots belonging\n" |
| 300 | "to class CLASS, i. e. the slots of CLASS and of all of its\n" |
| 301 | "superclasses.") |
| 302 | #define FUNC_NAME s_scm_sys_compute_slots |
| 303 | { |
| 304 | SCM_ASSERT (CLASSP (class), class, SCM_ARG1, FUNC_NAME); |
| 305 | |
| 306 | return build_slots_list (SCM_SLOT (class, scm_si_direct_slots), |
| 307 | SCM_SLOT (class, scm_si_cpl)); |
| 308 | } |
| 309 | #undef FUNC_NAME |
| 310 | |
| 311 | |
| 312 | /****************************************************************************** |
| 313 | * |
| 314 | * compute-getters-n-setters |
| 315 | * |
| 316 | * This version doesn't handle slot options. It serves only for booting |
| 317 | * classes and will be overaloaded in Scheme. |
| 318 | * |
| 319 | ******************************************************************************/ |
| 320 | |
| 321 | SCM_KEYWORD (k_init_value, "init-value"); |
| 322 | SCM_KEYWORD (k_init_thunk, "init-thunk"); |
| 323 | |
| 324 | static SCM |
| 325 | compute_getters_n_setters (SCM slots) |
| 326 | { |
| 327 | SCM res = SCM_EOL; |
| 328 | SCM *cdrloc = &res; |
| 329 | long i = 0; |
| 330 | |
| 331 | for ( ; SCM_NNULLP(slots); slots = SCM_CDR(slots)) |
| 332 | { |
| 333 | SCM init = SCM_BOOL_F; |
| 334 | SCM options = SCM_CDAR (slots); |
| 335 | if (SCM_NNULLP (options)) |
| 336 | { |
| 337 | init = scm_get_keyword (k_init_value, options, 0); |
| 338 | if (init) |
| 339 | init = scm_closure (SCM_LIST2 (SCM_EOL, init), SCM_EOL); |
| 340 | else |
| 341 | init = scm_get_keyword (k_init_thunk, options, SCM_BOOL_F); |
| 342 | } |
| 343 | *cdrloc = scm_cons (scm_cons (SCM_CAAR (slots), |
| 344 | scm_cons (init, |
| 345 | SCM_MAKINUM (i++))), |
| 346 | SCM_EOL); |
| 347 | cdrloc = SCM_CDRLOC (*cdrloc); |
| 348 | } |
| 349 | return res; |
| 350 | } |
| 351 | |
| 352 | /****************************************************************************** |
| 353 | * |
| 354 | * initialize-object |
| 355 | * |
| 356 | ******************************************************************************/ |
| 357 | |
| 358 | /*fixme* Manufacture keywords in advance */ |
| 359 | SCM |
| 360 | scm_i_get_keyword (SCM key, SCM l, int len, SCM default_value, const char *subr) |
| 361 | { |
| 362 | unsigned int i; |
| 363 | |
| 364 | for (i = 0; i != len; i += 2) |
| 365 | { |
| 366 | SCM obj = SCM_CAR (l); |
| 367 | |
| 368 | if (!SCM_KEYWORDP (obj)) |
| 369 | scm_misc_error (subr, "bad keyword: ~S", SCM_LIST1 (obj)); |
| 370 | else if (SCM_EQ_P (obj, key)) |
| 371 | return SCM_CADR (l); |
| 372 | else |
| 373 | l = SCM_CDDR (l); |
| 374 | } |
| 375 | |
| 376 | return default_value; |
| 377 | } |
| 378 | |
| 379 | |
| 380 | SCM_DEFINE (scm_get_keyword, "get-keyword", 3, 0, 0, |
| 381 | (SCM key, SCM l, SCM default_value), |
| 382 | "Determine an associated value for the keyword KEY from the\n" |
| 383 | "list L. The list L has to consist of an even number of\n" |
| 384 | "elements, where, starting with the first, every second element\n" |
| 385 | "is a keyword, followed by its associated value. If L does not\n" |
| 386 | "hold a value for KEY, the value DEFAULT_VALUE is returned.") |
| 387 | #define FUNC_NAME s_scm_get_keyword |
| 388 | { |
| 389 | int len; |
| 390 | |
| 391 | SCM_ASSERT (SCM_KEYWORDP (key), key, SCM_ARG1, FUNC_NAME); |
| 392 | len = scm_ilength (l); |
| 393 | if (len < 0 || len % 1 == 1) |
| 394 | scm_misc_error (FUNC_NAME, "Bad keyword-value list: ~S", SCM_LIST1 (l)); |
| 395 | |
| 396 | return scm_i_get_keyword (key, l, len, default_value, FUNC_NAME); |
| 397 | } |
| 398 | #undef FUNC_NAME |
| 399 | |
| 400 | |
| 401 | SCM_PROC (s_sys_initialize_object, "%initialize-object", 2, 0, 0, scm_sys_initialize_object); |
| 402 | |
| 403 | SCM_KEYWORD (k_init_keyword, "init-keyword"); |
| 404 | |
| 405 | static SCM get_slot_value (SCM class, SCM obj, SCM slotdef); |
| 406 | static SCM set_slot_value (SCM class, SCM obj, SCM slotdef, SCM value); |
| 407 | |
| 408 | SCM |
| 409 | scm_sys_initialize_object (SCM obj, SCM initargs) |
| 410 | { |
| 411 | SCM tmp, get_n_set, slots; |
| 412 | SCM class = SCM_CLASS_OF (obj); |
| 413 | int n_initargs; |
| 414 | |
| 415 | SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj), |
| 416 | obj, SCM_ARG1, s_sys_initialize_object); |
| 417 | n_initargs = scm_ilength (initargs); |
| 418 | SCM_ASSERT ((n_initargs & 1) == 0, |
| 419 | initargs, SCM_ARG2, s_sys_initialize_object); |
| 420 | |
| 421 | get_n_set = SCM_SLOT (class, scm_si_getters_n_setters); |
| 422 | slots = SCM_SLOT (class, scm_si_slots); |
| 423 | |
| 424 | /* See for each slot how it must be initialized */ |
| 425 | for (; |
| 426 | SCM_NNULLP (slots); |
| 427 | get_n_set = SCM_CDR (get_n_set), slots = SCM_CDR (slots)) |
| 428 | { |
| 429 | SCM slot_name = SCM_CAR (slots); |
| 430 | SCM slot_value = 0; |
| 431 | |
| 432 | if (SCM_NIMP (SCM_CDR (slot_name))) |
| 433 | { |
| 434 | /* This slot admits (perhaps) to be initialized at creation time */ |
| 435 | int n = scm_ilength (SCM_CDR (slot_name)); |
| 436 | if (n & 1) /* odd or -1 */ |
| 437 | scm_misc_error (s_sys_initialize_object, |
| 438 | "class contains bogus slot definition: ~S", |
| 439 | SCM_LIST1 (slot_name)); |
| 440 | tmp = scm_i_get_keyword (k_init_keyword, |
| 441 | SCM_CDR (slot_name), |
| 442 | n, |
| 443 | 0, |
| 444 | s_sys_initialize_object); |
| 445 | slot_name = SCM_CAR (slot_name); |
| 446 | if (tmp) |
| 447 | { |
| 448 | /* an initarg was provided for this slot */ |
| 449 | if (!(SCM_NIMP (tmp) && SCM_KEYWORDP (tmp))) |
| 450 | scm_misc_error (s_sys_initialize_object, |
| 451 | "initarg must be a keyword. It was ~S", |
| 452 | SCM_LIST1 (tmp)); |
| 453 | slot_value = scm_i_get_keyword (tmp, |
| 454 | initargs, |
| 455 | n_initargs, |
| 456 | 0, |
| 457 | s_sys_initialize_object); |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | if (slot_value) |
| 462 | /* set slot to provided value */ |
| 463 | set_slot_value (class, obj, SCM_CAR (get_n_set), slot_value); |
| 464 | else |
| 465 | { |
| 466 | /* set slot to its :init-form if it exists */ |
| 467 | tmp = SCM_CADAR (get_n_set); |
| 468 | if (tmp != SCM_BOOL_F) |
| 469 | { |
| 470 | slot_value = get_slot_value (class, obj, SCM_CAR (get_n_set)); |
| 471 | if (SCM_GOOPS_UNBOUNDP (slot_value)) |
| 472 | { |
| 473 | SCM env = SCM_EXTEND_ENV (SCM_EOL, SCM_EOL, SCM_ENV (tmp)); |
| 474 | set_slot_value (class, |
| 475 | obj, |
| 476 | SCM_CAR (get_n_set), |
| 477 | scm_eval_body (SCM_CDR (SCM_CODE (tmp)), |
| 478 | env)); |
| 479 | } |
| 480 | } |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | return obj; |
| 485 | } |
| 486 | |
| 487 | |
| 488 | SCM_KEYWORD (k_class, "class"); |
| 489 | |
| 490 | SCM_PROC (s_sys_prep_layout_x, "%prep-layout!", 1, 0, 0, scm_sys_prep_layout_x); |
| 491 | |
| 492 | SCM |
| 493 | scm_sys_prep_layout_x (SCM class) |
| 494 | { |
| 495 | int i, n, len; |
| 496 | char *s, p, a; |
| 497 | SCM nfields, slots, type; |
| 498 | |
| 499 | SCM_ASSERT (SCM_NIMP (class) && SCM_INSTANCEP (class), |
| 500 | class, |
| 501 | SCM_ARG1, |
| 502 | s_sys_prep_layout_x); |
| 503 | slots = SCM_SLOT (class, scm_si_slots); |
| 504 | nfields = SCM_SLOT (class, scm_si_nfields); |
| 505 | if (!SCM_INUMP (nfields) || SCM_INUM (nfields) < 0) |
| 506 | scm_misc_error (s_sys_prep_layout_x, |
| 507 | "bad value in nfields slot: ~S", |
| 508 | SCM_LIST1 (nfields)); |
| 509 | n = 2 * SCM_INUM (nfields); |
| 510 | if (n < sizeof (SCM_CLASS_CLASS_LAYOUT) - 1 |
| 511 | && SCM_SUBCLASSP (class, scm_class_class)) |
| 512 | scm_misc_error (s_sys_prep_layout_x, |
| 513 | "class object doesn't have enough fields: ~S", |
| 514 | SCM_LIST1 (nfields)); |
| 515 | |
| 516 | s = n > 0 ? scm_must_malloc (n, s_sys_prep_layout_x) : 0; |
| 517 | for (i = 0; i < n; i += 2) |
| 518 | { |
| 519 | if (!(SCM_NIMP (slots) && SCM_CONSP (slots))) |
| 520 | scm_misc_error (s_sys_prep_layout_x, |
| 521 | "to few slot definitions", |
| 522 | SCM_EOL); |
| 523 | len = scm_ilength (SCM_CDAR (slots)); |
| 524 | type = scm_i_get_keyword (k_class, SCM_CDAR (slots), len, SCM_BOOL_F, |
| 525 | s_sys_prep_layout_x); |
| 526 | if (SCM_NIMP (type) && SCM_SUBCLASSP (type, scm_class_foreign_slot)) |
| 527 | { |
| 528 | if (SCM_SUBCLASSP (type, scm_class_self)) |
| 529 | p = 's'; |
| 530 | else if (SCM_SUBCLASSP (type, scm_class_protected)) |
| 531 | p = 'p'; |
| 532 | else |
| 533 | p = 'u'; |
| 534 | |
| 535 | if (SCM_SUBCLASSP (type, scm_class_opaque)) |
| 536 | a = 'o'; |
| 537 | else if (SCM_SUBCLASSP (type, scm_class_read_only)) |
| 538 | a = 'r'; |
| 539 | else |
| 540 | a = 'w'; |
| 541 | } |
| 542 | else |
| 543 | { |
| 544 | p = 'p'; |
| 545 | a = 'w'; |
| 546 | } |
| 547 | s[i] = p; |
| 548 | s[i + 1] = a; |
| 549 | slots = SCM_CDR (slots); |
| 550 | } |
| 551 | SCM_SLOT (class, scm_si_layout) = SCM_CAR (scm_intern (s, n)); |
| 552 | if (s) |
| 553 | scm_must_free (s); |
| 554 | return SCM_UNSPECIFIED; |
| 555 | } |
| 556 | |
| 557 | static void prep_hashsets (SCM); |
| 558 | |
| 559 | SCM_PROC (s_sys_inherit_magic_x, "%inherit-magic!", 2, 0, 0, scm_sys_inherit_magic_x); |
| 560 | |
| 561 | SCM |
| 562 | scm_sys_inherit_magic_x (SCM class, SCM dsupers) |
| 563 | { |
| 564 | SCM ls = dsupers; |
| 565 | long flags = 0; |
| 566 | SCM_ASSERT (SCM_NIMP (class) && SCM_INSTANCEP (class), |
| 567 | class, |
| 568 | SCM_ARG1, |
| 569 | s_sys_inherit_magic_x); |
| 570 | while (SCM_NNULLP (ls)) |
| 571 | { |
| 572 | SCM_ASSERT (SCM_NIMP (ls) |
| 573 | && SCM_CONSP (ls) |
| 574 | && SCM_NIMP (SCM_CAR (ls)) |
| 575 | && SCM_INSTANCEP (SCM_CAR (ls)), |
| 576 | dsupers, |
| 577 | SCM_ARG2, |
| 578 | s_sys_inherit_magic_x); |
| 579 | flags |= SCM_CLASS_FLAGS (SCM_CAR (ls)); |
| 580 | ls = SCM_CDR (ls); |
| 581 | } |
| 582 | flags &= SCM_CLASSF_INHERIT; |
| 583 | if (flags & SCM_CLASSF_ENTITY) |
| 584 | SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_entity); |
| 585 | else |
| 586 | { |
| 587 | int n = SCM_INUM (SCM_SLOT (class, scm_si_nfields)); |
| 588 | #if 0 |
| 589 | /* |
| 590 | * We could avoid calling scm_must_malloc in the allocation code |
| 591 | * (in which case the following two lines are needed). Instead |
| 592 | * we make 0-slot instances non-light, so that the light case |
| 593 | * can be handled without special cases. |
| 594 | */ |
| 595 | if (n == 0) |
| 596 | SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_0); |
| 597 | #endif |
| 598 | if (n > 0 && !(flags & SCM_CLASSF_METACLASS)) |
| 599 | { |
| 600 | /* NOTE: The following depends on scm_struct_i_size. */ |
| 601 | flags |= SCM_STRUCTF_LIGHT + n * sizeof (SCM); /* use light representation */ |
| 602 | SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light); |
| 603 | } |
| 604 | } |
| 605 | SCM_SET_CLASS_FLAGS (class, flags); |
| 606 | |
| 607 | prep_hashsets (class); |
| 608 | |
| 609 | return SCM_UNSPECIFIED; |
| 610 | } |
| 611 | |
| 612 | void |
| 613 | prep_hashsets (SCM class) |
| 614 | { |
| 615 | int i; |
| 616 | |
| 617 | for (i = 0; i < 7; ++i) |
| 618 | SCM_SLOT (class, scm_si_hashsets + i) |
| 619 | = SCM_PACK (scm_c_uniform32 (goops_rstate)); |
| 620 | } |
| 621 | |
| 622 | /******************************************************************************/ |
| 623 | |
| 624 | SCM |
| 625 | scm_basic_basic_make_class (SCM class, SCM name, SCM dsupers, SCM dslots) |
| 626 | { |
| 627 | SCM z, cpl, slots, nfields, g_n_s; |
| 628 | |
| 629 | /* Allocate one instance */ |
| 630 | z = scm_make_struct (class, SCM_INUM0, SCM_EOL); |
| 631 | |
| 632 | /* Initialize its slots */ |
| 633 | #if 0 |
| 634 | cpl = compute_cpl (dsupers, SCM_LIST1(z)); |
| 635 | #endif |
| 636 | SCM_SLOT (z, scm_si_direct_supers) = dsupers; |
| 637 | cpl = compute_cpl (z); |
| 638 | slots = build_slots_list (maplist (dslots), cpl); |
| 639 | nfields = SCM_MAKINUM (scm_ilength (slots)); |
| 640 | g_n_s = compute_getters_n_setters (slots); |
| 641 | |
| 642 | SCM_SLOT(z, scm_si_name) = name; |
| 643 | SCM_SLOT(z, scm_si_direct_slots) = dslots; |
| 644 | SCM_SLOT(z, scm_si_direct_subclasses) = SCM_EOL; |
| 645 | SCM_SLOT(z, scm_si_direct_methods) = SCM_EOL; |
| 646 | SCM_SLOT(z, scm_si_cpl) = cpl; |
| 647 | SCM_SLOT(z, scm_si_slots) = slots; |
| 648 | SCM_SLOT(z, scm_si_nfields) = nfields; |
| 649 | SCM_SLOT(z, scm_si_getters_n_setters) = g_n_s; |
| 650 | SCM_SLOT(z, scm_si_redefined) = SCM_BOOL_F; |
| 651 | SCM_SLOT(z, scm_si_environment) |
| 652 | = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE); |
| 653 | |
| 654 | /* Add this class in the direct-subclasses slot of dsupers */ |
| 655 | { |
| 656 | SCM tmp; |
| 657 | for (tmp = dsupers; SCM_NNULLP(tmp); tmp = SCM_CDR(tmp)) |
| 658 | SCM_SLOT(SCM_CAR(tmp), scm_si_direct_subclasses) |
| 659 | = scm_cons(z, SCM_SLOT(SCM_CAR(tmp), scm_si_direct_subclasses)); |
| 660 | } |
| 661 | |
| 662 | /* Support for the underlying structs: */ |
| 663 | SCM_SET_CLASS_FLAGS (z, (class == scm_class_entity_class |
| 664 | ? (SCM_CLASSF_GOOPS_OR_VALID |
| 665 | | SCM_CLASSF_OPERATOR |
| 666 | | SCM_CLASSF_ENTITY) |
| 667 | : class == scm_class_operator_class |
| 668 | ? SCM_CLASSF_GOOPS_OR_VALID | SCM_CLASSF_OPERATOR |
| 669 | : SCM_CLASSF_GOOPS_OR_VALID)); |
| 670 | return z; |
| 671 | } |
| 672 | |
| 673 | SCM |
| 674 | scm_basic_make_class (SCM class, SCM name, SCM dsupers, SCM dslots) |
| 675 | { |
| 676 | SCM z = scm_basic_basic_make_class (class, name, dsupers, dslots); |
| 677 | scm_sys_inherit_magic_x (z, dsupers); |
| 678 | scm_sys_prep_layout_x (z); |
| 679 | return z; |
| 680 | } |
| 681 | |
| 682 | /******************************************************************************/ |
| 683 | |
| 684 | static SCM |
| 685 | build_class_class_slots () |
| 686 | { |
| 687 | return maplist ( |
| 688 | scm_cons (SCM_LIST3 (Intern ("layout"), |
| 689 | k_class, |
| 690 | scm_class_protected_read_only), |
| 691 | scm_cons (SCM_LIST3 (Intern ("vcell"), |
| 692 | k_class, |
| 693 | scm_class_opaque), |
| 694 | scm_cons (SCM_LIST3 (Intern ("vtable"), |
| 695 | k_class, |
| 696 | scm_class_self), |
| 697 | scm_cons (Intern ("print"), |
| 698 | scm_cons (SCM_LIST3 (Intern ("procedure"), |
| 699 | k_class, |
| 700 | scm_class_protected_opaque), |
| 701 | scm_cons (SCM_LIST3 (Intern ("setter"), |
| 702 | k_class, |
| 703 | scm_class_protected_opaque), |
| 704 | scm_cons (Intern ("redefined"), |
| 705 | scm_cons (SCM_LIST3 (Intern ("h0"), |
| 706 | k_class, |
| 707 | scm_class_int), |
| 708 | scm_cons (SCM_LIST3 (Intern ("h1"), |
| 709 | k_class, |
| 710 | scm_class_int), |
| 711 | scm_cons (SCM_LIST3 (Intern ("h2"), |
| 712 | k_class, |
| 713 | scm_class_int), |
| 714 | scm_cons (SCM_LIST3 (Intern ("h3"), |
| 715 | k_class, |
| 716 | scm_class_int), |
| 717 | scm_cons (SCM_LIST3 (Intern ("h4"), |
| 718 | k_class, |
| 719 | scm_class_int), |
| 720 | scm_cons (SCM_LIST3 (Intern ("h5"), |
| 721 | k_class, |
| 722 | scm_class_int), |
| 723 | scm_cons (SCM_LIST3 (Intern ("h6"), |
| 724 | k_class, |
| 725 | scm_class_int), |
| 726 | scm_cons (SCM_LIST3 (Intern ("h7"), |
| 727 | k_class, |
| 728 | scm_class_int), |
| 729 | scm_cons (Intern ("name"), |
| 730 | scm_cons (Intern ("direct-supers"), |
| 731 | scm_cons (Intern ("direct-slots"), |
| 732 | scm_cons (Intern ("direct-subclasses"), |
| 733 | scm_cons (Intern ("direct-methods"), |
| 734 | scm_cons (Intern ("cpl"), |
| 735 | scm_cons (Intern ("default-slot-definition-class"), |
| 736 | scm_cons (Intern ("slots"), |
| 737 | scm_cons (Intern ("getters-n-setters"), /* name-access */ |
| 738 | scm_cons (Intern ("keyword-access"), |
| 739 | scm_cons (Intern ("nfields"), |
| 740 | scm_cons (Intern ("environment"), |
| 741 | SCM_EOL)))))))))))))))))))))))))))); |
| 742 | } |
| 743 | |
| 744 | static void |
| 745 | create_basic_classes (void) |
| 746 | { |
| 747 | /* SCM slots_of_class = build_class_class_slots (); */ |
| 748 | |
| 749 | /**** <scm_class_class> ****/ |
| 750 | SCM cs = scm_makfrom0str (SCM_CLASS_CLASS_LAYOUT |
| 751 | + 2 * scm_vtable_offset_user); |
| 752 | SCM name = Intern ("<class>"); |
| 753 | scm_class_class = scm_permanent_object (scm_make_vtable_vtable (cs, |
| 754 | SCM_INUM0, |
| 755 | SCM_EOL)); |
| 756 | SCM_SET_CLASS_FLAGS (scm_class_class, (SCM_CLASSF_GOOPS_OR_VALID |
| 757 | | SCM_CLASSF_METACLASS)); |
| 758 | |
| 759 | SCM_SLOT(scm_class_class, scm_si_name) = name; |
| 760 | SCM_SLOT(scm_class_class, scm_si_direct_supers) = SCM_EOL; /* will be changed */ |
| 761 | /* SCM_SLOT(scm_class_class, scm_si_direct_slots) = slots_of_class; */ |
| 762 | SCM_SLOT(scm_class_class, scm_si_direct_subclasses)= SCM_EOL; |
| 763 | SCM_SLOT(scm_class_class, scm_si_direct_methods) = SCM_EOL; |
| 764 | SCM_SLOT(scm_class_class, scm_si_cpl) = SCM_EOL; /* will be changed */ |
| 765 | /* SCM_SLOT(scm_class_class, scm_si_slots) = slots_of_class; */ |
| 766 | SCM_SLOT(scm_class_class, scm_si_nfields) = SCM_MAKINUM (SCM_N_CLASS_SLOTS); |
| 767 | /* SCM_SLOT(scm_class_class, scm_si_getters_n_setters) |
| 768 | = compute_getters_n_setters (slots_of_class); */ |
| 769 | SCM_SLOT(scm_class_class, scm_si_redefined) = SCM_BOOL_F; |
| 770 | SCM_SLOT(scm_class_class, scm_si_environment) |
| 771 | = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE); |
| 772 | |
| 773 | prep_hashsets (scm_class_class); |
| 774 | |
| 775 | DEFVAR(name, scm_class_class); |
| 776 | |
| 777 | /**** <scm_class_top> ****/ |
| 778 | name = Intern ("<top>"); |
| 779 | scm_class_top = scm_permanent_object (scm_basic_make_class (scm_class_class, |
| 780 | name, |
| 781 | SCM_EOL, |
| 782 | SCM_EOL)); |
| 783 | |
| 784 | DEFVAR(name, scm_class_top); |
| 785 | |
| 786 | /**** <scm_class_object> ****/ |
| 787 | name = Intern("<object>"); |
| 788 | scm_class_object = scm_permanent_object (scm_basic_make_class (scm_class_class, |
| 789 | name, |
| 790 | SCM_LIST1 (scm_class_top), |
| 791 | SCM_EOL)); |
| 792 | |
| 793 | DEFVAR (name, scm_class_object); |
| 794 | |
| 795 | /* <top> <object> and <class> were partially initialized. Correct them here */ |
| 796 | SCM_SLOT (scm_class_object, scm_si_direct_subclasses) = SCM_LIST1 (scm_class_class); |
| 797 | |
| 798 | SCM_SLOT (scm_class_class, scm_si_direct_supers) = SCM_LIST1 (scm_class_object); |
| 799 | SCM_SLOT (scm_class_class, scm_si_cpl) = SCM_LIST3 (scm_class_class, scm_class_object, scm_class_top); |
| 800 | } |
| 801 | |
| 802 | /******************************************************************************/ |
| 803 | |
| 804 | SCM_PROC (s_instance_p, "instance?", 1, 0, 0, scm_instance_p); |
| 805 | |
| 806 | SCM |
| 807 | scm_instance_p (SCM obj) |
| 808 | { |
| 809 | return SCM_NIMP (obj) && SCM_INSTANCEP (obj) ? SCM_BOOL_T : SCM_BOOL_F; |
| 810 | } |
| 811 | |
| 812 | SCM_PROC (s_class_of, "class-of", 1, 0, 0, scm_class_of); |
| 813 | /* scm_class_of is defined in libguile */ |
| 814 | |
| 815 | /****************************************************************************** |
| 816 | * |
| 817 | * Meta object accessors |
| 818 | * |
| 819 | ******************************************************************************/ |
| 820 | SCM_PROC (s_class_name, "class-name", 1, 0, 0, scm_class_name); |
| 821 | |
| 822 | SCM |
| 823 | scm_class_name (SCM obj) |
| 824 | { |
| 825 | SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), obj, SCM_ARG1, s_class_name); |
| 826 | return scm_slot_ref (obj, Intern ("name")); |
| 827 | } |
| 828 | |
| 829 | SCM_PROC (s_class_direct_supers, "class-direct-supers", 1, 0, 0, scm_class_direct_supers); |
| 830 | |
| 831 | SCM |
| 832 | scm_class_direct_supers (SCM obj) |
| 833 | { |
| 834 | SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), obj, SCM_ARG1, s_class_direct_supers); |
| 835 | return scm_slot_ref (obj, Intern("direct-supers")); |
| 836 | } |
| 837 | |
| 838 | SCM_PROC (s_class_direct_slots, "class-direct-slots", 1, 0, 0, scm_class_direct_slots); |
| 839 | |
| 840 | SCM |
| 841 | scm_class_direct_slots (SCM obj) |
| 842 | { |
| 843 | SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), |
| 844 | obj, SCM_ARG1, s_class_direct_slots); |
| 845 | return scm_slot_ref (obj, Intern ("direct-slots")); |
| 846 | } |
| 847 | |
| 848 | SCM_PROC (s_class_direct_subclasses, "class-direct-subclasses", 1, 0, 0, scm_class_direct_subclasses); |
| 849 | |
| 850 | SCM |
| 851 | scm_class_direct_subclasses (SCM obj) |
| 852 | { |
| 853 | SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), |
| 854 | obj, SCM_ARG1, s_class_direct_subclasses); |
| 855 | return scm_slot_ref(obj, Intern ("direct-subclasses")); |
| 856 | } |
| 857 | |
| 858 | SCM_PROC (s_class_direct_methods, "class-direct-methods", 1, 0, 0, scm_class_direct_methods); |
| 859 | |
| 860 | SCM |
| 861 | scm_class_direct_methods (SCM obj) |
| 862 | { |
| 863 | SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), |
| 864 | obj, SCM_ARG1, s_class_direct_methods); |
| 865 | return scm_slot_ref (obj, Intern("direct-methods")); |
| 866 | } |
| 867 | |
| 868 | SCM_PROC (s_class_direct_precedence_list, "class-precedence-list", 1, 0, 0, scm_class_precedence_list); |
| 869 | |
| 870 | SCM |
| 871 | scm_class_precedence_list (SCM obj) |
| 872 | { |
| 873 | SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), |
| 874 | obj, SCM_ARG1, s_class_direct_precedence_list); |
| 875 | return scm_slot_ref (obj, Intern ("cpl")); |
| 876 | } |
| 877 | |
| 878 | SCM_PROC (s_class_slots, "class-slots", 1, 0, 0, scm_class_slots); |
| 879 | |
| 880 | SCM |
| 881 | scm_class_slots (SCM obj) |
| 882 | { |
| 883 | SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), |
| 884 | obj, SCM_ARG1, s_class_slots); |
| 885 | return scm_slot_ref (obj, Intern ("slots")); |
| 886 | } |
| 887 | |
| 888 | SCM_PROC (s_class_environment, "class-environment", 1, 0, 0, scm_class_environment); |
| 889 | |
| 890 | SCM |
| 891 | scm_class_environment (SCM obj) |
| 892 | { |
| 893 | SCM_ASSERT (SCM_NIMP (obj) && CLASSP (obj), |
| 894 | obj, SCM_ARG1, s_class_environment); |
| 895 | return scm_slot_ref(obj, Intern ("environment")); |
| 896 | } |
| 897 | |
| 898 | |
| 899 | SCM_PROC (s_generic_function_name, "generic-function-name", 1, 0, 0, scm_generic_function_name); |
| 900 | |
| 901 | SCM |
| 902 | scm_generic_function_name (SCM obj) |
| 903 | { |
| 904 | SCM_ASSERT (SCM_NIMP (obj) && GENERICP (obj), |
| 905 | obj, SCM_ARG1, s_generic_function_name); |
| 906 | return scm_procedure_property (obj, scm_sym_name); |
| 907 | } |
| 908 | |
| 909 | SCM_PROC (s_generic_function_methods, "generic-function-methods", 1, 0, 0, scm_generic_function_methods); |
| 910 | |
| 911 | SCM |
| 912 | scm_generic_function_methods (SCM obj) |
| 913 | { |
| 914 | SCM_ASSERT (SCM_NIMP (obj) && GENERICP (obj), |
| 915 | obj, SCM_ARG1, s_generic_function_methods); |
| 916 | return scm_slot_ref (obj, Intern ("methods")); |
| 917 | } |
| 918 | |
| 919 | |
| 920 | SCM_PROC (s_method_generic_function, "method-generic-function", 1, 0, 0, scm_method_generic_function); |
| 921 | |
| 922 | SCM |
| 923 | scm_method_generic_function (SCM obj) |
| 924 | { |
| 925 | SCM_ASSERT (SCM_NIMP (obj) && METHODP (obj), |
| 926 | obj, SCM_ARG1, s_method_generic_function); |
| 927 | return scm_slot_ref (obj, Intern ("generic-function")); |
| 928 | } |
| 929 | |
| 930 | SCM_PROC (s_method_specializers, "method-specializers", 1, 0, 0, scm_method_specializers); |
| 931 | |
| 932 | SCM |
| 933 | scm_method_specializers (SCM obj) |
| 934 | { |
| 935 | SCM_ASSERT (SCM_NIMP (obj) && METHODP (obj), |
| 936 | obj, SCM_ARG1, s_method_specializers); |
| 937 | return scm_slot_ref (obj, Intern ("specializers")); |
| 938 | } |
| 939 | |
| 940 | SCM_PROC (s_method_procedure, "method-procedure", 1, 0, 0, scm_method_procedure); |
| 941 | |
| 942 | SCM |
| 943 | scm_method_procedure (SCM obj) |
| 944 | { |
| 945 | SCM_ASSERT (SCM_NIMP (obj) && METHODP (obj), |
| 946 | obj, SCM_ARG1, s_method_procedure); |
| 947 | return scm_slot_ref (obj, Intern ("procedure")); |
| 948 | } |
| 949 | |
| 950 | SCM_PROC (s_accessor_method_slot_definition, "accessor-method-slot-definition", 1, 0, 0, scm_accessor_method_slot_definition); |
| 951 | |
| 952 | SCM |
| 953 | scm_accessor_method_slot_definition (SCM obj) |
| 954 | { |
| 955 | SCM_ASSERT (SCM_NIMP (obj) && SCM_ACCESSORP (obj), |
| 956 | obj, SCM_ARG1, s_method_procedure); |
| 957 | return scm_slot_ref (obj, Intern ("slot-definition")); |
| 958 | } |
| 959 | |
| 960 | |
| 961 | /****************************************************************************** |
| 962 | * |
| 963 | * S l o t a c c e s s |
| 964 | * |
| 965 | ******************************************************************************/ |
| 966 | |
| 967 | SCM_PROC (s_make_unbound, "make-unbound", 0, 0, 0, scm_make_unbound); |
| 968 | |
| 969 | static SCM |
| 970 | scm_make_unbound () |
| 971 | { |
| 972 | return SCM_GOOPS_UNBOUND; |
| 973 | } |
| 974 | |
| 975 | SCM_PROC (s_unbound_p, "unbound?", 1, 0, 0, scm_unbound_p); |
| 976 | |
| 977 | static SCM |
| 978 | scm_unbound_p (SCM obj) |
| 979 | { |
| 980 | return SCM_GOOPS_UNBOUNDP (obj) ? SCM_BOOL_T : SCM_BOOL_F; |
| 981 | } |
| 982 | |
| 983 | SCM_PROC (s_assert_bound, "assert-bound", 2, 0, 0, scm_assert_bound); |
| 984 | |
| 985 | static SCM |
| 986 | scm_assert_bound (SCM value, SCM obj) |
| 987 | { |
| 988 | if (SCM_GOOPS_UNBOUNDP (value)) |
| 989 | return CALL_GF1 ("slot-unbound", obj); |
| 990 | return value; |
| 991 | } |
| 992 | |
| 993 | SCM_PROC (s_at_assert_bound_ref, "@assert-bound-ref", 2, 0, 0, scm_at_assert_bound_ref); |
| 994 | |
| 995 | static SCM |
| 996 | scm_at_assert_bound_ref (SCM obj, SCM index) |
| 997 | { |
| 998 | SCM value = SCM_SLOT (obj, SCM_INUM (index)); |
| 999 | if (SCM_GOOPS_UNBOUNDP (value)) |
| 1000 | return CALL_GF1 ("slot-unbound", obj); |
| 1001 | return value; |
| 1002 | } |
| 1003 | |
| 1004 | SCM_PROC (s_sys_fast_slot_ref, "%fast-slot-ref", 2, 0, 0, scm_sys_fast_slot_ref); |
| 1005 | |
| 1006 | SCM |
| 1007 | scm_sys_fast_slot_ref (SCM obj, SCM index) |
| 1008 | #define FUNC_NAME s_sys_fast_slot_ref |
| 1009 | { |
| 1010 | register long i; |
| 1011 | |
| 1012 | SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj), |
| 1013 | obj, SCM_ARG1, s_sys_fast_slot_ref); |
| 1014 | SCM_ASSERT (SCM_INUMP (index), index, SCM_ARG2, s_sys_fast_slot_ref); |
| 1015 | i = SCM_INUM (index); |
| 1016 | |
| 1017 | SCM_ASSERT_RANGE (2, index, i >= 0 && i < SCM_NUMBER_OF_SLOTS (obj)); |
| 1018 | return scm_at_assert_bound_ref (obj, index); |
| 1019 | } |
| 1020 | #undef FUNC_NAME |
| 1021 | |
| 1022 | |
| 1023 | SCM_PROC (s_sys_fast_slot_set_x, "%fast-slot-set!", 3, 0, 0, scm_sys_fast_slot_set_x); |
| 1024 | |
| 1025 | SCM |
| 1026 | scm_sys_fast_slot_set_x (SCM obj, SCM index, SCM value) |
| 1027 | #define FUNC_NAME s_sys_fast_slot_set_x |
| 1028 | { |
| 1029 | register long i; |
| 1030 | |
| 1031 | SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj), |
| 1032 | obj, SCM_ARG1, s_sys_fast_slot_set_x); |
| 1033 | SCM_ASSERT (SCM_INUMP (index), index, SCM_ARG2, s_sys_fast_slot_set_x); |
| 1034 | i = SCM_INUM (index); |
| 1035 | SCM_ASSERT_RANGE (2, index, i >= 0 && i < SCM_NUMBER_OF_SLOTS (obj)); |
| 1036 | SCM_SLOT (obj, i) = value; |
| 1037 | |
| 1038 | return SCM_UNSPECIFIED; |
| 1039 | } |
| 1040 | #undef FUNC_NAME |
| 1041 | |
| 1042 | |
| 1043 | /** Utilities **/ |
| 1044 | |
| 1045 | /* In the future, this function will return the effective slot |
| 1046 | * definition associated with SLOT_NAME. Now it just returns some of |
| 1047 | * the information which will be stored in the effective slot |
| 1048 | * definition. |
| 1049 | */ |
| 1050 | |
| 1051 | static SCM |
| 1052 | slot_definition_using_name (SCM class, SCM slot_name) |
| 1053 | { |
| 1054 | register SCM slots = SCM_SLOT (class, scm_si_getters_n_setters); |
| 1055 | for (; SCM_NIMP (slots); slots = SCM_CDR (slots)) |
| 1056 | if (SCM_CAAR (slots) == slot_name) |
| 1057 | return SCM_CAR (slots); |
| 1058 | return SCM_BOOL_F; |
| 1059 | } |
| 1060 | |
| 1061 | static SCM |
| 1062 | get_slot_value (SCM class, SCM obj, SCM slotdef) |
| 1063 | { |
| 1064 | SCM access = SCM_CDDR (slotdef); |
| 1065 | /* Two cases here: |
| 1066 | * - access is an integer (the offset of this slot in the slots vector) |
| 1067 | * - otherwise (car access) is the getter function to apply |
| 1068 | */ |
| 1069 | if (SCM_INUMP (access)) |
| 1070 | return SCM_SLOT (obj, SCM_INUM (access)); |
| 1071 | else |
| 1072 | { |
| 1073 | /* We must evaluate (apply (car access) (list obj)) |
| 1074 | * where (car access) is known to be a closure of arity 1 */ |
| 1075 | register SCM code, env; |
| 1076 | |
| 1077 | code = SCM_CAR (access); |
| 1078 | if (!SCM_CLOSUREP (code)) |
| 1079 | return SCM_SUBRF (code) (obj); |
| 1080 | env = SCM_EXTEND_ENV (SCM_CAR (SCM_CODE (code)), |
| 1081 | SCM_LIST1 (obj), |
| 1082 | SCM_ENV (code)); |
| 1083 | /* Evaluate the closure body */ |
| 1084 | return scm_eval_body (SCM_CDR (SCM_CODE (code)), env); |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | static SCM |
| 1089 | get_slot_value_using_name (SCM class, SCM obj, SCM slot_name) |
| 1090 | { |
| 1091 | SCM slotdef = slot_definition_using_name (class, slot_name); |
| 1092 | if (SCM_NFALSEP (slotdef)) |
| 1093 | return get_slot_value (class, obj, slotdef); |
| 1094 | else |
| 1095 | return CALL_GF3 ("slot-missing", class, obj, slot_name); |
| 1096 | } |
| 1097 | |
| 1098 | static SCM |
| 1099 | set_slot_value (SCM class, SCM obj, SCM slotdef, SCM value) |
| 1100 | { |
| 1101 | SCM access = SCM_CDDR (slotdef); |
| 1102 | /* Two cases here: |
| 1103 | * - access is an integer (the offset of this slot in the slots vector) |
| 1104 | * - otherwise (cadr access) is the setter function to apply |
| 1105 | */ |
| 1106 | if (SCM_INUMP (access)) |
| 1107 | SCM_SLOT (obj, SCM_INUM (access)) = value; |
| 1108 | else |
| 1109 | { |
| 1110 | /* We must evaluate (apply (cadr l) (list obj value)) |
| 1111 | * where (cadr l) is known to be a closure of arity 2 */ |
| 1112 | register SCM code, env; |
| 1113 | |
| 1114 | code = SCM_CADR (access); |
| 1115 | if (!SCM_CLOSUREP (code)) |
| 1116 | SCM_SUBRF (code) (obj, value); |
| 1117 | else |
| 1118 | { |
| 1119 | env = SCM_EXTEND_ENV (SCM_CAR (SCM_CODE (code)), |
| 1120 | SCM_LIST2 (obj, value), |
| 1121 | SCM_ENV (code)); |
| 1122 | /* Evaluate the closure body */ |
| 1123 | scm_eval_body (SCM_CDR (SCM_CODE (code)), env); |
| 1124 | } |
| 1125 | } |
| 1126 | return SCM_UNSPECIFIED; |
| 1127 | } |
| 1128 | |
| 1129 | static SCM |
| 1130 | set_slot_value_using_name (SCM class, SCM obj, SCM slot_name, SCM value) |
| 1131 | { |
| 1132 | SCM slotdef = slot_definition_using_name (class, slot_name); |
| 1133 | if (SCM_NFALSEP (slotdef)) |
| 1134 | return set_slot_value (class, obj, slotdef, value); |
| 1135 | else |
| 1136 | return CALL_GF4 ("slot-missing", class, obj, slot_name, value); |
| 1137 | } |
| 1138 | |
| 1139 | static SCM |
| 1140 | test_slot_existence (SCM class, SCM obj, SCM slot_name) |
| 1141 | { |
| 1142 | register SCM l; |
| 1143 | |
| 1144 | for (l = SCM_ACCESSORS_OF (obj); SCM_NNULLP (l); l = SCM_CDR (l)) |
| 1145 | if (SCM_CAAR (l) == slot_name) |
| 1146 | return SCM_BOOL_T; |
| 1147 | |
| 1148 | return SCM_BOOL_F; |
| 1149 | } |
| 1150 | |
| 1151 | /* ======================================== */ |
| 1152 | |
| 1153 | SCM_DEFINE (scm_slot_ref_using_class, "slot-ref-using-class", 3, 0, 0, |
| 1154 | (SCM class, SCM obj, SCM slot_name), |
| 1155 | "") |
| 1156 | #define FUNC_NAME s_scm_slot_ref_using_class |
| 1157 | { |
| 1158 | SCM res; |
| 1159 | |
| 1160 | SCM_ASSERT (CLASSP (class), class, SCM_ARG1, FUNC_NAME); |
| 1161 | SCM_ASSERT (SCM_INSTANCEP (obj), obj, SCM_ARG1, FUNC_NAME); |
| 1162 | SCM_ASSERT (SCM_SYMBOLP (slot_name), obj, SCM_ARG3, FUNC_NAME); |
| 1163 | |
| 1164 | res = get_slot_value_using_name (class, obj, slot_name); |
| 1165 | if (SCM_GOOPS_UNBOUNDP (res)) |
| 1166 | return CALL_GF3 ("slot-unbound", class, obj, slot_name); |
| 1167 | return res; |
| 1168 | } |
| 1169 | #undef FUNC_NAME |
| 1170 | |
| 1171 | |
| 1172 | SCM_DEFINE (scm_slot_set_using_class_x, "slot-set-using-class!", 4, 0, 0, |
| 1173 | (SCM class, SCM obj, SCM slot_name, SCM value), |
| 1174 | "") |
| 1175 | #define FUNC_NAME s_scm_slot_set_using_class_x |
| 1176 | { |
| 1177 | SCM_ASSERT (CLASSP (class), class, SCM_ARG1, FUNC_NAME); |
| 1178 | SCM_ASSERT (SCM_INSTANCEP (obj), obj, SCM_ARG2, FUNC_NAME); |
| 1179 | SCM_ASSERT (SCM_SYMBOLP (slot_name), obj, SCM_ARG3, FUNC_NAME); |
| 1180 | |
| 1181 | return set_slot_value_using_name (class, obj, slot_name, value); |
| 1182 | } |
| 1183 | #undef FUNC_NAME |
| 1184 | |
| 1185 | |
| 1186 | SCM_PROC (s_slot_bound_using_class_p, "slot-bound-using-class?", 3, 0, 0, scm_slot_bound_using_class_p); |
| 1187 | |
| 1188 | SCM |
| 1189 | scm_slot_bound_using_class_p (SCM class, SCM obj, SCM slot_name) |
| 1190 | { |
| 1191 | SCM_ASSERT (SCM_NIMP (class) && CLASSP (class), |
| 1192 | class, SCM_ARG1, s_slot_bound_using_class_p); |
| 1193 | SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj), |
| 1194 | obj, SCM_ARG2, s_slot_bound_using_class_p); |
| 1195 | SCM_ASSERT (SCM_NIMP (slot_name) && SCM_SYMBOLP (slot_name), |
| 1196 | obj, SCM_ARG3, s_slot_bound_using_class_p); |
| 1197 | |
| 1198 | return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class, obj, slot_name)) |
| 1199 | ? SCM_BOOL_F |
| 1200 | : SCM_BOOL_T); |
| 1201 | } |
| 1202 | |
| 1203 | SCM_PROC (s_slot_exists_using_class_p, "slot-exists-using-class?", 3, 0, 0, scm_slot_exists_using_class_p); |
| 1204 | |
| 1205 | SCM |
| 1206 | scm_slot_exists_using_class_p (SCM class, SCM obj, SCM slot_name) |
| 1207 | { |
| 1208 | SCM_ASSERT (SCM_NIMP (class) && CLASSP (class), |
| 1209 | class, SCM_ARG1, s_slot_exists_using_class_p); |
| 1210 | SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj), |
| 1211 | obj, SCM_ARG2, s_slot_exists_using_class_p); |
| 1212 | SCM_ASSERT (SCM_NIMP (slot_name) && SCM_SYMBOLP (slot_name), |
| 1213 | obj, SCM_ARG3, s_slot_exists_using_class_p); |
| 1214 | return test_slot_existence (class, obj, slot_name); |
| 1215 | } |
| 1216 | |
| 1217 | |
| 1218 | /* ======================================== */ |
| 1219 | |
| 1220 | SCM_PROC (s_slot_ref, "slot-ref", 2, 0, 0, scm_slot_ref); |
| 1221 | |
| 1222 | SCM |
| 1223 | scm_slot_ref (SCM obj, SCM slot_name) |
| 1224 | { |
| 1225 | SCM res, class; |
| 1226 | |
| 1227 | SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj), |
| 1228 | obj, SCM_ARG1, s_slot_ref); |
| 1229 | TEST_CHANGE_CLASS (obj, class); |
| 1230 | |
| 1231 | res = get_slot_value_using_name (class, obj, slot_name); |
| 1232 | if (SCM_GOOPS_UNBOUNDP (res)) |
| 1233 | return CALL_GF3 ("slot-unbound", class, obj, slot_name); |
| 1234 | return res; |
| 1235 | } |
| 1236 | |
| 1237 | SCM_PROC (s_slot_set_x, "slot-set!", 3, 0, 0, scm_slot_set_x); |
| 1238 | |
| 1239 | const char *scm_s_slot_set_x = s_slot_set_x; |
| 1240 | |
| 1241 | SCM |
| 1242 | scm_slot_set_x (SCM obj, SCM slot_name, SCM value) |
| 1243 | { |
| 1244 | SCM class; |
| 1245 | |
| 1246 | SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj), |
| 1247 | obj, SCM_ARG1, s_slot_set_x); |
| 1248 | TEST_CHANGE_CLASS(obj, class); |
| 1249 | |
| 1250 | return set_slot_value_using_name (class, obj, slot_name, value); |
| 1251 | } |
| 1252 | |
| 1253 | SCM_PROC (s_slot_bound_p, "slot-bound?", 2, 0, 0, scm_slot_bound_p); |
| 1254 | |
| 1255 | SCM |
| 1256 | scm_slot_bound_p (SCM obj, SCM slot_name) |
| 1257 | { |
| 1258 | SCM class; |
| 1259 | |
| 1260 | SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj), |
| 1261 | obj, SCM_ARG1, s_slot_bound_p); |
| 1262 | TEST_CHANGE_CLASS(obj, class); |
| 1263 | |
| 1264 | return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class, |
| 1265 | obj, |
| 1266 | slot_name)) |
| 1267 | ? SCM_BOOL_F |
| 1268 | : SCM_BOOL_T); |
| 1269 | } |
| 1270 | |
| 1271 | SCM_PROC (s_slot_exists_p, "slot-exists?", 2, 0, 0, scm_slots_exists_p); |
| 1272 | |
| 1273 | SCM |
| 1274 | scm_slots_exists_p (SCM obj, SCM slot_name) |
| 1275 | { |
| 1276 | SCM class; |
| 1277 | |
| 1278 | SCM_ASSERT (SCM_NIMP (obj) && SCM_INSTANCEP (obj), |
| 1279 | obj, SCM_ARG1, s_slot_exists_p); |
| 1280 | SCM_ASSERT (SCM_NIMP (slot_name) && SCM_SYMBOLP (slot_name), |
| 1281 | slot_name, SCM_ARG2, s_slot_exists_p); |
| 1282 | TEST_CHANGE_CLASS (obj, class); |
| 1283 | |
| 1284 | return test_slot_existence (class, obj, slot_name); |
| 1285 | } |
| 1286 | |
| 1287 | |
| 1288 | /****************************************************************************** |
| 1289 | * |
| 1290 | * %allocate-instance (the low level instance allocation primitive) |
| 1291 | * |
| 1292 | ******************************************************************************/ |
| 1293 | |
| 1294 | static void clear_method_cache (SCM); |
| 1295 | |
| 1296 | static SCM |
| 1297 | wrap_init (SCM class, SCM *m, int n) |
| 1298 | { |
| 1299 | SCM z; |
| 1300 | int i; |
| 1301 | |
| 1302 | /* Set all slots to unbound */ |
| 1303 | for (i = 0; i < n; i++) |
| 1304 | m[i] = SCM_GOOPS_UNBOUND; |
| 1305 | |
| 1306 | SCM_NEWCELL2 (z); |
| 1307 | SCM_SETCDR (z, (SCM) m); |
| 1308 | SCM_SET_STRUCT_GC_CHAIN (z, 0); |
| 1309 | SCM_SETCAR (z, (scm_bits_t) SCM_STRUCT_DATA (class) | scm_tc3_cons_gloc); |
| 1310 | |
| 1311 | return z; |
| 1312 | } |
| 1313 | |
| 1314 | SCM_PROC (s_sys_allocate_instance, "%allocate-instance", 2, 0, 0, scm_sys_allocate_instance); |
| 1315 | |
| 1316 | SCM |
| 1317 | scm_sys_allocate_instance (SCM class, SCM initargs) |
| 1318 | { |
| 1319 | SCM *m; |
| 1320 | int n; |
| 1321 | |
| 1322 | SCM_ASSERT (SCM_NIMP (class) && CLASSP (class), |
| 1323 | class, SCM_ARG1, s_sys_allocate_instance); |
| 1324 | |
| 1325 | /* Most instances */ |
| 1326 | if (SCM_CLASS_FLAGS (class) & SCM_STRUCTF_LIGHT) |
| 1327 | { |
| 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); |
| 1331 | } |
| 1332 | |
| 1333 | /* Foreign objects */ |
| 1334 | if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_FOREIGN) |
| 1335 | return scm_make_foreign_object (class, initargs); |
| 1336 | |
| 1337 | n = SCM_INUM (SCM_SLOT (class, scm_si_nfields)); |
| 1338 | |
| 1339 | /* Entities */ |
| 1340 | if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_ENTITY) |
| 1341 | { |
| 1342 | m = (SCM *) scm_alloc_struct (n, |
| 1343 | scm_struct_entity_n_extra_words, |
| 1344 | "entity"); |
| 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) |
| 1349 | { |
| 1350 | SCM gf = wrap_init (class, m, n); |
| 1351 | clear_method_cache (gf); |
| 1352 | return gf; |
| 1353 | } |
| 1354 | else |
| 1355 | return wrap_init (class, m, n); |
| 1356 | } |
| 1357 | |
| 1358 | /* Class objects */ |
| 1359 | if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_METACLASS) |
| 1360 | { |
| 1361 | int i; |
| 1362 | |
| 1363 | /* allocate class object */ |
| 1364 | SCM z = scm_make_struct (class, SCM_INUM0, SCM_EOL); |
| 1365 | |
| 1366 | SCM_SLOT (z, scm_si_print) = SCM_GOOPS_UNBOUND; |
| 1367 | for (i = scm_si_goops_fields; i < n; i++) |
| 1368 | SCM_SLOT (z, i) = SCM_GOOPS_UNBOUND; |
| 1369 | |
| 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); |
| 1374 | |
| 1375 | return z; |
| 1376 | } |
| 1377 | |
| 1378 | /* Non-light instances */ |
| 1379 | { |
| 1380 | m = (SCM *) scm_alloc_struct (n, |
| 1381 | scm_struct_n_extra_words, |
| 1382 | "heavy instance"); |
| 1383 | return wrap_init (class, m, n); |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | SCM_PROC (s_sys_set_object_setter_x, "%set-object-setter!", 2, 0, 0, scm_sys_set_object_setter_x); |
| 1388 | |
| 1389 | SCM |
| 1390 | scm_sys_set_object_setter_x (SCM obj, SCM setter) |
| 1391 | { |
| 1392 | SCM_ASSERT (SCM_NIMP (obj) && SCM_STRUCTP (obj) |
| 1393 | && ((SCM_CLASS_FLAGS (obj) & SCM_CLASSF_OPERATOR) |
| 1394 | || SCM_I_ENTITYP (obj)), |
| 1395 | obj, |
| 1396 | SCM_ARG1, |
| 1397 | s_sys_set_object_setter_x); |
| 1398 | if (SCM_I_ENTITYP (obj)) |
| 1399 | SCM_ENTITY_SETTER (obj) = setter; |
| 1400 | else |
| 1401 | SCM_OPERATOR_CLASS (obj)->setter = setter; |
| 1402 | return SCM_UNSPECIFIED; |
| 1403 | } |
| 1404 | |
| 1405 | /****************************************************************************** |
| 1406 | * |
| 1407 | * %modify-instance (used by change-class to modify in place) |
| 1408 | * |
| 1409 | ******************************************************************************/ |
| 1410 | |
| 1411 | SCM_PROC (s_sys_modify_instance, "%modify-instance", 2, 0, 0, scm_sys_modify_instance); |
| 1412 | |
| 1413 | SCM |
| 1414 | scm_sys_modify_instance (SCM old, SCM new) |
| 1415 | { |
| 1416 | SCM_ASSERT (SCM_NIMP (old) && SCM_INSTANCEP (old), |
| 1417 | old, SCM_ARG1, s_sys_modify_instance); |
| 1418 | SCM_ASSERT (SCM_NIMP (new) && SCM_INSTANCEP (new), |
| 1419 | new, SCM_ARG2, s_sys_modify_instance); |
| 1420 | |
| 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". |
| 1424 | */ |
| 1425 | SCM_REDEFER_INTS; |
| 1426 | { |
| 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); |
| 1433 | } |
| 1434 | SCM_REALLOW_INTS; |
| 1435 | return SCM_UNSPECIFIED; |
| 1436 | } |
| 1437 | |
| 1438 | SCM_PROC (s_sys_modify_class, "%modify-class", 2, 0, 0, scm_sys_modify_class); |
| 1439 | |
| 1440 | SCM |
| 1441 | scm_sys_modify_class (SCM old, SCM new) |
| 1442 | { |
| 1443 | SCM_ASSERT (SCM_NIMP (old) && CLASSP (old), |
| 1444 | old, SCM_ARG1, s_sys_modify_class); |
| 1445 | SCM_ASSERT (SCM_NIMP (new) && CLASSP (new), |
| 1446 | new, SCM_ARG2, s_sys_modify_class); |
| 1447 | |
| 1448 | SCM_REDEFER_INTS; |
| 1449 | { |
| 1450 | SCM car = SCM_CAR (old); |
| 1451 | SCM cdr = SCM_CDR (old); |
| 1452 | SCM_SETCAR (old, SCM_CAR (new)); |
| 1453 | SCM_SETCDR (old, SCM_CDR (new)); |
| 1454 | SCM_STRUCT_DATA (old)[scm_vtable_index_vtable] = old; |
| 1455 | SCM_SETCAR (new, car); |
| 1456 | SCM_SETCDR (new, cdr); |
| 1457 | SCM_STRUCT_DATA (new)[scm_vtable_index_vtable] = new; |
| 1458 | } |
| 1459 | SCM_REALLOW_INTS; |
| 1460 | return SCM_UNSPECIFIED; |
| 1461 | } |
| 1462 | |
| 1463 | SCM_PROC (s_sys_invalidate_class, "%invalidate-class", 1, 0, 0, scm_sys_invalidate_class); |
| 1464 | |
| 1465 | SCM |
| 1466 | scm_sys_invalidate_class (SCM class) |
| 1467 | { |
| 1468 | SCM_ASSERT (SCM_NIMP (class) && CLASSP (class), |
| 1469 | class, SCM_ARG1, s_sys_invalidate_class); |
| 1470 | |
| 1471 | SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID); |
| 1472 | return SCM_UNSPECIFIED; |
| 1473 | } |
| 1474 | |
| 1475 | /* When instances change class, they finally get a new body, but |
| 1476 | * before that, they go through purgatory in hell. Odd as it may |
| 1477 | * seem, this data structure saves us from eternal suffering in |
| 1478 | * infinite recursions. |
| 1479 | */ |
| 1480 | |
| 1481 | static SCM **hell; |
| 1482 | static int n_hell = 1; /* one place for the evil one himself */ |
| 1483 | static int hell_size = 4; |
| 1484 | #ifdef USE_THREADS |
| 1485 | static scm_mutex_t hell_mutex; |
| 1486 | #endif |
| 1487 | |
| 1488 | static int |
| 1489 | burnin (SCM o) |
| 1490 | { |
| 1491 | int i; |
| 1492 | for (i = 1; i < n_hell; ++i) |
| 1493 | if (SCM_INST (o) == hell[i]) |
| 1494 | return i; |
| 1495 | return 0; |
| 1496 | } |
| 1497 | |
| 1498 | static void |
| 1499 | go_to_hell (void *o) |
| 1500 | { |
| 1501 | SCM obj = (SCM) o; |
| 1502 | #ifdef USE_THREADS |
| 1503 | scm_mutex_lock (&hell_mutex); |
| 1504 | #endif |
| 1505 | if (n_hell == hell_size) |
| 1506 | { |
| 1507 | int new_size = 2 * hell_size; |
| 1508 | hell = scm_must_realloc (hell, hell_size, new_size, "hell"); |
| 1509 | hell_size = new_size; |
| 1510 | } |
| 1511 | hell[n_hell++] = SCM_INST (obj); |
| 1512 | #ifdef USE_THREADS |
| 1513 | scm_mutex_unlock (&hell_mutex); |
| 1514 | #endif |
| 1515 | } |
| 1516 | |
| 1517 | static void |
| 1518 | go_to_heaven (void *o) |
| 1519 | { |
| 1520 | #ifdef USE_THREADS |
| 1521 | scm_mutex_lock (&hell_mutex); |
| 1522 | #endif |
| 1523 | hell[burnin ((SCM) o)] = hell[--n_hell]; |
| 1524 | #ifdef USE_THREADS |
| 1525 | scm_mutex_unlock (&hell_mutex); |
| 1526 | #endif |
| 1527 | } |
| 1528 | |
| 1529 | static SCM |
| 1530 | purgatory (void *args) |
| 1531 | { |
| 1532 | return scm_apply (GETVAR (Intern ("change-class")), (SCM) args, SCM_EOL); |
| 1533 | } |
| 1534 | |
| 1535 | void |
| 1536 | scm_change_object_class (SCM obj, SCM old_class, SCM new_class) |
| 1537 | { |
| 1538 | if (!burnin (obj)) |
| 1539 | scm_internal_dynamic_wind (go_to_hell, purgatory, go_to_heaven, |
| 1540 | (void *) SCM_LIST2 (obj, new_class), |
| 1541 | (void *) obj); |
| 1542 | } |
| 1543 | |
| 1544 | /****************************************************************************** |
| 1545 | * |
| 1546 | * GGGG FFFFF |
| 1547 | * G F |
| 1548 | * G GG FFF |
| 1549 | * G G F |
| 1550 | * GGG E N E R I C F U N C T I O N S |
| 1551 | * |
| 1552 | * This implementation provides |
| 1553 | * - generic functions (with class specializers) |
| 1554 | * - multi-methods |
| 1555 | * - next-method |
| 1556 | * - a hard-coded MOP for standard gf, which can be overloaded for non-std gf |
| 1557 | * |
| 1558 | ******************************************************************************/ |
| 1559 | |
| 1560 | SCM_KEYWORD (k_name, "name"); |
| 1561 | |
| 1562 | SCM_SYMBOL (sym_no_method, "no-method"); |
| 1563 | |
| 1564 | static SCM list_of_no_method; |
| 1565 | |
| 1566 | SCM_SYMBOL (scm_sym_args, "args"); |
| 1567 | |
| 1568 | SCM |
| 1569 | scm_make_method_cache (SCM gf) |
| 1570 | { |
| 1571 | return SCM_LIST5 (SCM_IM_DISPATCH, scm_sym_args, SCM_MAKINUM (1), |
| 1572 | scm_make_vector (SCM_MAKINUM (SCM_INITIAL_MCACHE_SIZE), |
| 1573 | list_of_no_method), |
| 1574 | gf); |
| 1575 | } |
| 1576 | |
| 1577 | static void |
| 1578 | clear_method_cache (SCM gf) |
| 1579 | { |
| 1580 | SCM_ENTITY_PROCEDURE (gf) = scm_make_method_cache (gf); |
| 1581 | SCM_SLOT (gf, scm_si_used_by) = SCM_BOOL_F; |
| 1582 | } |
| 1583 | |
| 1584 | SCM_PROC (s_sys_invalidate_method_cache_x, "%invalidate-method-cache!", 1, 0, 0, scm_sys_invalidate_method_cache_x); |
| 1585 | |
| 1586 | SCM |
| 1587 | scm_sys_invalidate_method_cache_x (SCM gf) |
| 1588 | { |
| 1589 | SCM used_by; |
| 1590 | SCM_ASSERT (SCM_NIMP (gf) && SCM_STRUCTP (gf) && SCM_PUREGENERICP (gf), |
| 1591 | gf, SCM_ARG1, s_sys_invalidate_method_cache_x); |
| 1592 | used_by = SCM_SLOT (gf, scm_si_used_by); |
| 1593 | if (SCM_NFALSEP (used_by)) |
| 1594 | { |
| 1595 | SCM methods = SCM_SLOT (gf, scm_si_methods); |
| 1596 | for (; SCM_NIMP (used_by) && SCM_CONSP (used_by); |
| 1597 | used_by = SCM_CDR (used_by)) |
| 1598 | scm_sys_invalidate_method_cache_x (SCM_CAR (used_by)); |
| 1599 | clear_method_cache (gf); |
| 1600 | for (; SCM_NIMP (methods) && SCM_CONSP (methods); |
| 1601 | methods = SCM_CDR (methods)) |
| 1602 | SCM_SLOT (SCM_CAR (methods), scm_si_code_table) = SCM_EOL; |
| 1603 | } |
| 1604 | { |
| 1605 | SCM n = SCM_SLOT (gf, scm_si_n_specialized); |
| 1606 | /* The sign of n is a flag indicating rest args. */ |
| 1607 | SCM_SET_MCACHE_N_SPECIALIZED (SCM_ENTITY_PROCEDURE (gf), n); |
| 1608 | } |
| 1609 | return SCM_UNSPECIFIED; |
| 1610 | } |
| 1611 | |
| 1612 | SCM_PROC (s_generic_capability_p, "generic-capability?", 1, 0, 0, scm_generic_capability_p); |
| 1613 | |
| 1614 | SCM |
| 1615 | scm_generic_capability_p (SCM proc) |
| 1616 | { |
| 1617 | SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (proc)), |
| 1618 | proc, SCM_ARG1, s_generic_capability_p); |
| 1619 | return (scm_subr_p (proc) && SCM_SUBR_GENERIC (proc) |
| 1620 | ? SCM_BOOL_T |
| 1621 | : SCM_BOOL_F); |
| 1622 | } |
| 1623 | |
| 1624 | SCM_PROC (s_enable_primitive_generic_x, "enable-primitive-generic!", 0, 0, 1, scm_enable_primitive_generic_x); |
| 1625 | |
| 1626 | SCM |
| 1627 | scm_enable_primitive_generic_x (SCM subrs) |
| 1628 | { |
| 1629 | while (SCM_NIMP (subrs)) |
| 1630 | { |
| 1631 | SCM subr = SCM_CAR (subrs); |
| 1632 | SCM_ASSERT (scm_subr_p (subr) && SCM_SUBR_GENERIC (subr), |
| 1633 | subr, SCM_ARGn, s_enable_primitive_generic_x); |
| 1634 | *SCM_SUBR_GENERIC (subr) |
| 1635 | = scm_make (SCM_LIST3 (scm_class_generic, |
| 1636 | k_name, |
| 1637 | SCM_SNAME (subr))); |
| 1638 | subrs = SCM_CDR (subrs); |
| 1639 | } |
| 1640 | return SCM_UNSPECIFIED; |
| 1641 | } |
| 1642 | |
| 1643 | SCM_PROC (s_primitive_generic_generic, "primitive-generic-generic", 1, 0, 0, scm_primitive_generic_generic); |
| 1644 | |
| 1645 | SCM |
| 1646 | scm_primitive_generic_generic (SCM subr) |
| 1647 | { |
| 1648 | if (scm_subr_p (subr) && SCM_SUBR_GENERIC (subr)) |
| 1649 | { |
| 1650 | SCM gf = *SCM_SUBR_GENERIC (subr); |
| 1651 | if (gf) |
| 1652 | return gf; |
| 1653 | } |
| 1654 | return scm_wta (subr, (char *) SCM_ARG1, s_primitive_generic_generic); |
| 1655 | } |
| 1656 | |
| 1657 | /****************************************************************************** |
| 1658 | * |
| 1659 | * Protocol for calling a generic fumction |
| 1660 | * This protocol is roughly equivalent to (parameter are a little bit different |
| 1661 | * for efficiency reasons): |
| 1662 | * |
| 1663 | * + apply-generic (gf args) |
| 1664 | * + compute-applicable-methods (gf args ...) |
| 1665 | * + sort-applicable-methods (methods args) |
| 1666 | * + apply-methods (gf methods args) |
| 1667 | * |
| 1668 | * apply-methods calls make-next-method to build the "continuation" of a a |
| 1669 | * method. Applying a next-method will call apply-next-method which in |
| 1670 | * turn will call apply again to call effectively the following method. |
| 1671 | * |
| 1672 | ******************************************************************************/ |
| 1673 | |
| 1674 | static int |
| 1675 | applicablep (SCM actual, SCM formal) |
| 1676 | { |
| 1677 | register SCM ptr; |
| 1678 | |
| 1679 | /* We test that (memq formal (slot-ref actual 'cpl)) |
| 1680 | * However, we don't call memq here since we already know that |
| 1681 | * the list is well formed |
| 1682 | */ |
| 1683 | for (ptr=SCM_SLOT(actual, scm_si_cpl); SCM_NNULLP(ptr); ptr = SCM_CDR(ptr)) { |
| 1684 | if (SCM_NIMP (ptr) && SCM_CONSP (ptr)) { |
| 1685 | if (SCM_CAR (ptr) == formal) |
| 1686 | return 1; |
| 1687 | } |
| 1688 | else |
| 1689 | scm_misc_error (0, |
| 1690 | "Internal error in applicable: bad list ~S", |
| 1691 | SCM_LIST1 (actual)); |
| 1692 | } |
| 1693 | return 0; |
| 1694 | } |
| 1695 | |
| 1696 | static int |
| 1697 | more_specificp (SCM m1, SCM m2, SCM *targs) |
| 1698 | { |
| 1699 | register SCM s1, s2; |
| 1700 | register int i; |
| 1701 | /* |
| 1702 | * Note: |
| 1703 | * m1 and m2 can have != length (i.e. one can be one element longer than the |
| 1704 | * other when we have a dotted parameter list). For instance, with the call |
| 1705 | * (M 1) |
| 1706 | * with |
| 1707 | * (define-method M (a . l) ....) |
| 1708 | * (define-method M (a) ....) |
| 1709 | * |
| 1710 | * we consider that the second method is more specific. |
| 1711 | * |
| 1712 | * BTW, targs is an array of types. We don't need it's size since |
| 1713 | * we already know that m1 and m2 are applicable (no risk to go past |
| 1714 | * the end of this array). |
| 1715 | * |
| 1716 | */ |
| 1717 | for (i=0,s1=SPEC_OF(m1),s2=SPEC_OF(m2); ; i++,s1=SCM_CDR(s1),s2=SCM_CDR(s2)) { |
| 1718 | if (SCM_NULLP(s1)) return 1; |
| 1719 | if (SCM_NULLP(s2)) return 0; |
| 1720 | if (SCM_CAR(s1) != SCM_CAR(s2)) { |
| 1721 | register SCM l, cs1 = SCM_CAR(s1), cs2 = SCM_CAR(s2); |
| 1722 | |
| 1723 | for (l = SCM_SLOT(targs[i], scm_si_cpl); ; l = SCM_CDR(l)) { |
| 1724 | if (cs1 == SCM_CAR(l)) |
| 1725 | return 1; |
| 1726 | if (cs2 == SCM_CAR(l)) |
| 1727 | return 0; |
| 1728 | } |
| 1729 | return 0;/* should not occur! */ |
| 1730 | } |
| 1731 | } |
| 1732 | return 0; /* should not occur! */ |
| 1733 | } |
| 1734 | |
| 1735 | #define BUFFSIZE 32 /* big enough for most uses */ |
| 1736 | |
| 1737 | static SCM |
| 1738 | scm_i_vector2list (SCM l, int len) |
| 1739 | { |
| 1740 | int j; |
| 1741 | SCM z = scm_make_vector (SCM_MAKINUM (len), SCM_UNDEFINED); |
| 1742 | |
| 1743 | for (j = 0; j < len; j++, l = SCM_CDR (l)) { |
| 1744 | SCM_VELTS (z)[j] = SCM_CAR (l); |
| 1745 | } |
| 1746 | return z; |
| 1747 | } |
| 1748 | |
| 1749 | static SCM |
| 1750 | sort_applicable_methods (SCM method_list, int size, SCM *targs) |
| 1751 | { |
| 1752 | int i, j, incr; |
| 1753 | SCM *v, vector = SCM_EOL; |
| 1754 | SCM buffer[BUFFSIZE]; |
| 1755 | SCM save = method_list; |
| 1756 | |
| 1757 | /* For reasonably sized method_lists we can try to avoid all the |
| 1758 | * consing and reorder the list in place... |
| 1759 | * This idea is due to David McClain <Dave_McClain@msn.com> |
| 1760 | */ |
| 1761 | if (size <= BUFFSIZE) |
| 1762 | { |
| 1763 | for (i = 0; i < size; i++) |
| 1764 | { |
| 1765 | buffer[i] = SCM_CAR (method_list); |
| 1766 | method_list = SCM_CDR (method_list); |
| 1767 | } |
| 1768 | v = buffer; |
| 1769 | } |
| 1770 | else |
| 1771 | { |
| 1772 | /* Too many elements in method_list to keep everything locally */ |
| 1773 | vector = scm_i_vector2list (save, size); |
| 1774 | v = SCM_VELTS (vector); |
| 1775 | } |
| 1776 | |
| 1777 | /* Use a simple shell sort since it is generally faster than qsort on |
| 1778 | * small vectors (which is probably mostly the case when we have to |
| 1779 | * sort a list of applicable methods). |
| 1780 | */ |
| 1781 | for (incr = size / 2; incr; incr /= 2) |
| 1782 | { |
| 1783 | for (i = incr; i < size; i++) |
| 1784 | { |
| 1785 | for (j = i - incr; j >= 0; j -= incr) |
| 1786 | { |
| 1787 | if (more_specificp (v[j], v[j+incr], targs)) |
| 1788 | break; |
| 1789 | else |
| 1790 | { |
| 1791 | SCM tmp = v[j + incr]; |
| 1792 | v[j + incr] = v[j]; |
| 1793 | v[j] = tmp; |
| 1794 | } |
| 1795 | } |
| 1796 | } |
| 1797 | } |
| 1798 | |
| 1799 | if (size <= BUFFSIZE) |
| 1800 | { |
| 1801 | /* We did it in locally, so restore the original list (reordered) in-place */ |
| 1802 | for (i = 0, method_list = save; i < size; i++, v++) |
| 1803 | { |
| 1804 | SCM_SETCAR (method_list, *v); |
| 1805 | method_list = SCM_CDR (method_list); |
| 1806 | } |
| 1807 | return save; |
| 1808 | } |
| 1809 | /* If we are here, that's that we did it the hard way... */ |
| 1810 | return scm_vector_to_list (vector); |
| 1811 | } |
| 1812 | |
| 1813 | SCM |
| 1814 | scm_compute_applicable_methods (SCM gf, SCM args, int len, int find_method_p) |
| 1815 | { |
| 1816 | register int i; |
| 1817 | int count = 0; |
| 1818 | SCM l, fl, applicable = SCM_EOL; |
| 1819 | SCM save = args; |
| 1820 | SCM buffer[BUFFSIZE], *types, *p; |
| 1821 | SCM tmp; |
| 1822 | |
| 1823 | /* Build the list of arguments types */ |
| 1824 | if (len >= BUFFSIZE) { |
| 1825 | tmp = scm_make_vector (SCM_MAKINUM (len), SCM_UNDEFINED); |
| 1826 | /* NOTE: Using pointers to malloced memory won't work if we |
| 1827 | 1. have preemtive threading, and, |
| 1828 | 2. have a GC which moves objects. */ |
| 1829 | types = p = SCM_VELTS(tmp); |
| 1830 | } |
| 1831 | else |
| 1832 | types = p = buffer; |
| 1833 | |
| 1834 | for ( ; SCM_NNULLP (args); args = SCM_CDR (args)) |
| 1835 | *p++ = scm_class_of (SCM_CAR (args)); |
| 1836 | |
| 1837 | /* Build a list of all applicable methods */ |
| 1838 | for (l = SCM_SLOT (gf, scm_si_methods); SCM_NNULLP (l); l = SCM_CDR (l)) |
| 1839 | { |
| 1840 | fl = SPEC_OF (SCM_CAR (l)); |
| 1841 | /* Only accept accessors which match exactly in first arg. */ |
| 1842 | if (SCM_ACCESSORP (SCM_CAR (l)) |
| 1843 | && (SCM_IMP (fl) || types[0] != SCM_CAR (fl))) |
| 1844 | continue; |
| 1845 | for (i = 0; ; i++, fl = SCM_CDR (fl)) |
| 1846 | { |
| 1847 | if ((SCM_NIMP (fl) && SCM_INSTANCEP (fl)) |
| 1848 | /* We have a dotted argument list */ |
| 1849 | || (i >= len && SCM_NULLP (fl))) |
| 1850 | { /* both list exhausted */ |
| 1851 | applicable = scm_cons (SCM_CAR (l), applicable); |
| 1852 | count += 1; |
| 1853 | break; |
| 1854 | } |
| 1855 | if (i >= len |
| 1856 | || SCM_NULLP (fl) |
| 1857 | || !applicablep (types[i], SCM_CAR (fl))) |
| 1858 | break; |
| 1859 | } |
| 1860 | } |
| 1861 | |
| 1862 | if (count == 0) |
| 1863 | { |
| 1864 | if (find_method_p) |
| 1865 | return SCM_BOOL_F; |
| 1866 | CALL_GF2 ("no-applicable-method", gf, save); |
| 1867 | /* if we are here, it's because no-applicable-method hasn't signaled an error */ |
| 1868 | return SCM_BOOL_F; |
| 1869 | } |
| 1870 | return (count == 1 |
| 1871 | ? applicable |
| 1872 | : sort_applicable_methods (applicable, count, types)); |
| 1873 | } |
| 1874 | |
| 1875 | #if 0 |
| 1876 | SCM_PROC (s_sys_compute_applicable_methods, "%compute-applicable-methods", 2, 0, 0, scm_sys_compute_applicable_methods); |
| 1877 | #endif |
| 1878 | |
| 1879 | static const char s_sys_compute_applicable_methods[] = "%compute-applicable-methods"; |
| 1880 | |
| 1881 | SCM |
| 1882 | scm_sys_compute_applicable_methods (SCM gf, SCM args) |
| 1883 | { |
| 1884 | int n; |
| 1885 | SCM_ASSERT (SCM_NIMP (gf) && GENERICP (gf), |
| 1886 | gf, SCM_ARG1, s_sys_compute_applicable_methods); |
| 1887 | n = scm_ilength (args); |
| 1888 | SCM_ASSERT (n >= 0, args, SCM_ARG2, s_sys_compute_applicable_methods); |
| 1889 | return scm_compute_applicable_methods (gf, args, n, 1); |
| 1890 | } |
| 1891 | |
| 1892 | SCM_VCELL_INIT (var_compute_applicable_methods, "compute-applicable-methods", scm_make_gsubr (s_sys_compute_applicable_methods, 2, 0, 0, scm_sys_compute_applicable_methods)); |
| 1893 | |
| 1894 | SCM_SYNTAX (s_atslot_ref, "@slot-ref", scm_makmmacro, scm_m_atslot_ref); |
| 1895 | |
| 1896 | SCM |
| 1897 | scm_m_atslot_ref (SCM xorig, SCM env) |
| 1898 | { |
| 1899 | SCM x = SCM_CDR (xorig); |
| 1900 | SCM_ASSYNT (scm_ilength (x) == 2, xorig, scm_s_expression, s_atslot_ref); |
| 1901 | SCM_ASSYNT (SCM_INUMP (SCM_CADR (x)), SCM_CADR (x), SCM_ARG2, s_atslot_ref); |
| 1902 | return scm_cons (SCM_IM_SLOT_REF, x); |
| 1903 | } |
| 1904 | |
| 1905 | SCM_SYNTAX (s_atslot_set_x, "@slot-set!", scm_makmmacro, scm_m_atslot_set_x); |
| 1906 | |
| 1907 | SCM |
| 1908 | scm_m_atslot_set_x (SCM xorig, SCM env) |
| 1909 | { |
| 1910 | SCM x = SCM_CDR (xorig); |
| 1911 | SCM_ASSYNT (scm_ilength (x) == 3, xorig, scm_s_expression, s_atslot_set_x); |
| 1912 | SCM_ASSYNT (SCM_INUMP (SCM_CADR (x)), SCM_CADR (x), SCM_ARG2, s_atslot_set_x); |
| 1913 | return scm_cons (SCM_IM_SLOT_SET_X, x); |
| 1914 | } |
| 1915 | |
| 1916 | SCM_SYNTAX (s_atdispatch, "@dispatch", scm_makmmacro, scm_m_atdispatch); |
| 1917 | |
| 1918 | SCM_SYMBOL (sym_atdispatch, s_atdispatch); |
| 1919 | |
| 1920 | SCM |
| 1921 | scm_m_atdispatch (SCM xorig, SCM env) |
| 1922 | #define FUNC_NAME s_atdispatch |
| 1923 | { |
| 1924 | SCM args, n, v, gf, x = SCM_CDR (xorig); |
| 1925 | SCM_ASSYNT (scm_ilength (x) == 4, xorig, scm_s_expression, s_atdispatch); |
| 1926 | args = SCM_CAR (x); |
| 1927 | SCM_ASSYNT (SCM_NIMP (args) && (SCM_CONSP (args) || SCM_SYMBOLP (args)), |
| 1928 | args, SCM_ARG1, s_atdispatch); |
| 1929 | x = SCM_CDR (x); |
| 1930 | n = SCM_XEVALCAR (x, env); |
| 1931 | SCM_ASSYNT (SCM_INUMP (n), n, SCM_ARG2, s_atdispatch); |
| 1932 | SCM_ASSERT_RANGE (0, n, SCM_INUM (n) >= 1); |
| 1933 | x = SCM_CDR (x); |
| 1934 | v = SCM_XEVALCAR (x, env); |
| 1935 | SCM_ASSYNT (SCM_NIMP (v) && SCM_VECTORP (v), v, SCM_ARG3, s_atdispatch); |
| 1936 | x = SCM_CDR (x); |
| 1937 | gf = SCM_XEVALCAR (x, env); |
| 1938 | SCM_ASSYNT (SCM_NIMP (gf) && SCM_STRUCTP (gf) && SCM_PUREGENERICP (gf), |
| 1939 | gf, SCM_ARG4, s_atdispatch); |
| 1940 | return SCM_LIST5 (SCM_IM_DISPATCH, args, n, v, gf); |
| 1941 | } |
| 1942 | #undef FUNC_NAME |
| 1943 | |
| 1944 | |
| 1945 | #ifdef USE_THREADS |
| 1946 | static void |
| 1947 | lock_cache_mutex (void *m) |
| 1948 | { |
| 1949 | SCM mutex = (SCM) m; |
| 1950 | scm_lock_mutex (mutex); |
| 1951 | } |
| 1952 | |
| 1953 | static void |
| 1954 | unlock_cache_mutex (void *m) |
| 1955 | { |
| 1956 | SCM mutex = (SCM) m; |
| 1957 | scm_unlock_mutex (mutex); |
| 1958 | } |
| 1959 | #endif |
| 1960 | |
| 1961 | static SCM |
| 1962 | call_memoize_method (void *a) |
| 1963 | { |
| 1964 | SCM args = (SCM) 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. |
| 1969 | */ |
| 1970 | SCM cmethod = scm_mcache_lookup_cmethod (x, SCM_CDDR (args)); |
| 1971 | if (SCM_NIMP (cmethod)) |
| 1972 | return cmethod; |
| 1973 | /*fixme* Use scm_apply */ |
| 1974 | return CALL_GF3 ("memoize-method!", gf, SCM_CDDR (args), x); |
| 1975 | } |
| 1976 | |
| 1977 | SCM |
| 1978 | scm_memoize_method (SCM x, SCM args) |
| 1979 | { |
| 1980 | SCM gf = SCM_CAR (scm_last_pair (x)); |
| 1981 | #ifdef USE_THREADS |
| 1982 | return scm_internal_dynamic_wind (lock_cache_mutex, |
| 1983 | call_memoize_method, |
| 1984 | unlock_cache_mutex, |
| 1985 | (void *) scm_cons2 (gf, x, args), |
| 1986 | (void *) SCM_SLOT (gf, scm_si_cache_mutex)); |
| 1987 | #else |
| 1988 | return call_memoize_method ((void *) scm_cons2 (gf, x, args)); |
| 1989 | #endif |
| 1990 | } |
| 1991 | |
| 1992 | /****************************************************************************** |
| 1993 | * |
| 1994 | * A simple make (which will be redefined later in Scheme) |
| 1995 | * This version handles only creation of gf, methods and classes (no instances) |
| 1996 | * |
| 1997 | * Since this code will disappear when Goops will be fully booted, |
| 1998 | * no precaution is taken to be efficient. |
| 1999 | * |
| 2000 | ******************************************************************************/ |
| 2001 | |
| 2002 | SCM_KEYWORD (k_setter, "setter"); |
| 2003 | SCM_KEYWORD (k_specializers, "specializers"); |
| 2004 | SCM_KEYWORD (k_procedure, "procedure"); |
| 2005 | SCM_KEYWORD (k_dsupers, "dsupers"); |
| 2006 | SCM_KEYWORD (k_slots, "slots"); |
| 2007 | SCM_KEYWORD (k_gf, "generic-function"); |
| 2008 | |
| 2009 | SCM_PROC (s_make, "make", 0, 0, 1, scm_make); |
| 2010 | |
| 2011 | SCM |
| 2012 | scm_make (SCM args) |
| 2013 | { |
| 2014 | SCM class, z; |
| 2015 | int len = scm_ilength (args); |
| 2016 | |
| 2017 | if (len <= 0 || (len & 1) == 0) |
| 2018 | scm_wrong_num_args (scm_makfrom0str (s_make)); |
| 2019 | |
| 2020 | class = SCM_CAR(args); |
| 2021 | args = SCM_CDR(args); |
| 2022 | |
| 2023 | if (class == scm_class_generic || class == scm_class_generic_with_setter) |
| 2024 | { |
| 2025 | #ifdef USE_THREADS |
| 2026 | z = scm_make_struct (class, SCM_INUM0, |
| 2027 | SCM_LIST4 (SCM_EOL, |
| 2028 | SCM_INUM0, |
| 2029 | SCM_BOOL_F, |
| 2030 | scm_make_mutex ())); |
| 2031 | #else |
| 2032 | z = scm_make_struct (class, SCM_INUM0, |
| 2033 | SCM_LIST3 (SCM_EOL, SCM_INUM0, SCM_BOOL_F)); |
| 2034 | #endif |
| 2035 | scm_set_procedure_property_x (z, scm_sym_name, |
| 2036 | scm_get_keyword (k_name, |
| 2037 | args, |
| 2038 | SCM_BOOL_F)); |
| 2039 | clear_method_cache (z); |
| 2040 | if (class == scm_class_generic_with_setter) |
| 2041 | { |
| 2042 | SCM setter = scm_get_keyword (k_setter, args, SCM_BOOL_F); |
| 2043 | if (SCM_NIMP (setter)) |
| 2044 | scm_sys_set_object_setter_x (z, setter); |
| 2045 | } |
| 2046 | } |
| 2047 | else |
| 2048 | { |
| 2049 | z = scm_sys_allocate_instance (class, args); |
| 2050 | |
| 2051 | if (class == scm_class_method |
| 2052 | || class == scm_class_simple_method |
| 2053 | || class == scm_class_accessor) |
| 2054 | { |
| 2055 | SCM_SLOT (z, scm_si_generic_function) = |
| 2056 | scm_i_get_keyword (k_gf, |
| 2057 | args, |
| 2058 | len - 1, |
| 2059 | SCM_BOOL_F, |
| 2060 | s_make); |
| 2061 | SCM_SLOT (z, scm_si_specializers) = |
| 2062 | scm_i_get_keyword (k_specializers, |
| 2063 | args, |
| 2064 | len - 1, |
| 2065 | SCM_EOL, |
| 2066 | s_make); |
| 2067 | SCM_SLOT (z, scm_si_procedure) = |
| 2068 | scm_i_get_keyword (k_procedure, |
| 2069 | args, |
| 2070 | len - 1, |
| 2071 | SCM_EOL, |
| 2072 | s_make); |
| 2073 | SCM_SLOT (z, scm_si_code_table) = SCM_EOL; |
| 2074 | } |
| 2075 | else |
| 2076 | { |
| 2077 | /* In all the others case, make a new class .... No instance here */ |
| 2078 | SCM_SLOT (z, scm_si_name) = |
| 2079 | scm_i_get_keyword (k_name, |
| 2080 | args, |
| 2081 | len - 1, |
| 2082 | Intern ("???"), |
| 2083 | s_make); |
| 2084 | SCM_SLOT (z, scm_si_direct_supers) = |
| 2085 | scm_i_get_keyword (k_dsupers, |
| 2086 | args, |
| 2087 | len - 1, |
| 2088 | SCM_EOL, |
| 2089 | s_make); |
| 2090 | SCM_SLOT (z, scm_si_direct_slots) = |
| 2091 | scm_i_get_keyword (k_slots, |
| 2092 | args, |
| 2093 | len - 1, |
| 2094 | SCM_EOL, |
| 2095 | s_make); |
| 2096 | } |
| 2097 | } |
| 2098 | return z; |
| 2099 | } |
| 2100 | |
| 2101 | SCM_PROC (s_find_method, "find-method", 0, 0, 1, scm_find_method); |
| 2102 | |
| 2103 | SCM |
| 2104 | scm_find_method (SCM l) |
| 2105 | { |
| 2106 | SCM gf; |
| 2107 | int len = scm_ilength (l); |
| 2108 | |
| 2109 | if (len == 0) |
| 2110 | scm_wrong_num_args (scm_makfrom0str (s_find_method)); |
| 2111 | |
| 2112 | gf = SCM_CAR(l); l = SCM_CDR(l); |
| 2113 | SCM_ASSERT (SCM_NIMP (gf) && GENERICP (gf), gf, SCM_ARG1, s_find_method); |
| 2114 | if (SCM_NULLP (SCM_SLOT (gf, scm_si_methods))) |
| 2115 | scm_misc_error (s_find_method, |
| 2116 | "no methods for generic ~S", |
| 2117 | SCM_LIST1 (gf)); |
| 2118 | |
| 2119 | return scm_compute_applicable_methods (gf, l, len - 1, 1); |
| 2120 | } |
| 2121 | |
| 2122 | SCM_PROC (s_sys_method_more_specific_p, "%method-more-specific?", 3, 0, 0, scm_sys_method_more_specific_p); |
| 2123 | |
| 2124 | SCM |
| 2125 | scm_sys_method_more_specific_p (SCM m1, SCM m2, SCM targs) |
| 2126 | { |
| 2127 | SCM l, v; |
| 2128 | int i, len; |
| 2129 | |
| 2130 | SCM_ASSERT (SCM_NIMP (m1) && METHODP (m1), |
| 2131 | m1, SCM_ARG1, s_sys_method_more_specific_p); |
| 2132 | SCM_ASSERT (SCM_NIMP (m2) && METHODP (m2), |
| 2133 | m2, SCM_ARG2, s_sys_method_more_specific_p); |
| 2134 | SCM_ASSERT ((len = scm_ilength (targs)) != -1, |
| 2135 | targs, SCM_ARG3, s_sys_method_more_specific_p); |
| 2136 | |
| 2137 | /* Verify that all the arguments of targs are classes and place them in a vector*/ |
| 2138 | v = scm_make_vector (SCM_MAKINUM (len), SCM_EOL); |
| 2139 | |
| 2140 | for (i=0, l=targs; SCM_NNULLP(l); i++, l=SCM_CDR(l)) { |
| 2141 | SCM_ASSERT (SCM_NIMP (SCM_CAR (l)) && CLASSP (SCM_CAR (l)), |
| 2142 | targs, SCM_ARG3, s_sys_method_more_specific_p); |
| 2143 | SCM_VELTS(v)[i] = SCM_CAR(l); |
| 2144 | } |
| 2145 | return more_specificp (m1, m2, SCM_VELTS(v)) ? SCM_BOOL_T: SCM_BOOL_F; |
| 2146 | } |
| 2147 | |
| 2148 | |
| 2149 | |
| 2150 | /****************************************************************************** |
| 2151 | * |
| 2152 | * Initializations |
| 2153 | * |
| 2154 | ******************************************************************************/ |
| 2155 | |
| 2156 | |
| 2157 | static void |
| 2158 | make_stdcls (SCM *var, char *name, SCM meta, SCM super, SCM slots) |
| 2159 | { |
| 2160 | SCM tmp = Intern(name); |
| 2161 | |
| 2162 | *var = scm_permanent_object (scm_basic_make_class (meta, |
| 2163 | tmp, |
| 2164 | SCM_CONSP (super) |
| 2165 | ? super |
| 2166 | : SCM_LIST1 (super), |
| 2167 | slots)); |
| 2168 | DEFVAR(tmp, *var); |
| 2169 | } |
| 2170 | |
| 2171 | |
| 2172 | SCM_KEYWORD (k_slot_definition, "slot-definition"); |
| 2173 | |
| 2174 | static void |
| 2175 | create_standard_classes (void) |
| 2176 | { |
| 2177 | SCM slots; |
| 2178 | SCM method_slots = SCM_LIST4 (Intern ("generic-function"), |
| 2179 | Intern ("specializers"), |
| 2180 | Intern ("procedure"), |
| 2181 | Intern ("code-table")); |
| 2182 | SCM amethod_slots = SCM_LIST1 (SCM_LIST3 (Intern ("slot-definition"), |
| 2183 | k_init_keyword, |
| 2184 | k_slot_definition)); |
| 2185 | #ifdef USE_THREADS |
| 2186 | SCM mutex_slot = SCM_LIST1 (Intern ("make-mutex")); |
| 2187 | #else |
| 2188 | SCM mutex_slot = SCM_BOOL_F; |
| 2189 | #endif |
| 2190 | SCM gf_slots = SCM_LIST4 (Intern ("methods"), |
| 2191 | SCM_LIST3 (Intern ("n-specialized"), |
| 2192 | k_init_value, |
| 2193 | SCM_INUM0), |
| 2194 | SCM_LIST3 (Intern ("used-by"), |
| 2195 | k_init_value, |
| 2196 | SCM_BOOL_F), |
| 2197 | SCM_LIST3 (Intern ("cache-mutex"), |
| 2198 | k_init_thunk, |
| 2199 | scm_closure (SCM_LIST2 (SCM_EOL, |
| 2200 | mutex_slot), |
| 2201 | SCM_EOL))); |
| 2202 | |
| 2203 | /* Foreign class slot classes */ |
| 2204 | make_stdcls (&scm_class_foreign_slot, "<foreign-slot>", |
| 2205 | scm_class_class, scm_class_top, SCM_EOL); |
| 2206 | make_stdcls (&scm_class_protected, "<protected-slot>", |
| 2207 | scm_class_class, scm_class_foreign_slot, SCM_EOL); |
| 2208 | make_stdcls (&scm_class_opaque, "<opaque-slot>", |
| 2209 | scm_class_class, scm_class_foreign_slot, SCM_EOL); |
| 2210 | make_stdcls (&scm_class_read_only, "<read-only-slot>", |
| 2211 | scm_class_class, scm_class_foreign_slot, SCM_EOL); |
| 2212 | make_stdcls (&scm_class_self, "<self-slot>", |
| 2213 | scm_class_class, |
| 2214 | SCM_LIST2 (scm_class_foreign_slot, scm_class_read_only), |
| 2215 | SCM_EOL); |
| 2216 | make_stdcls (&scm_class_protected_opaque, "<protected-opaque-slot>", |
| 2217 | scm_class_class, |
| 2218 | SCM_LIST2 (scm_class_protected, scm_class_opaque), |
| 2219 | SCM_EOL); |
| 2220 | make_stdcls (&scm_class_protected_read_only, "<protected-read-only-slot>", |
| 2221 | scm_class_class, |
| 2222 | SCM_LIST2 (scm_class_protected, scm_class_read_only), |
| 2223 | SCM_EOL); |
| 2224 | make_stdcls (&scm_class_scm, "<scm-slot>", |
| 2225 | scm_class_class, scm_class_protected, SCM_EOL); |
| 2226 | make_stdcls (&scm_class_int, "<int-slot>", |
| 2227 | scm_class_class, scm_class_foreign_slot, SCM_EOL); |
| 2228 | make_stdcls (&scm_class_float, "<float-slot>", |
| 2229 | scm_class_class, scm_class_foreign_slot, SCM_EOL); |
| 2230 | make_stdcls (&scm_class_double, "<double-slot>", |
| 2231 | scm_class_class, scm_class_foreign_slot, SCM_EOL); |
| 2232 | |
| 2233 | /* Continue initialization of class <class> */ |
| 2234 | |
| 2235 | slots = build_class_class_slots (); |
| 2236 | SCM_SLOT (scm_class_class, scm_si_direct_slots) = slots; |
| 2237 | SCM_SLOT (scm_class_class, scm_si_slots) = slots; |
| 2238 | SCM_SLOT (scm_class_class, scm_si_getters_n_setters) |
| 2239 | = compute_getters_n_setters (slots); |
| 2240 | |
| 2241 | make_stdcls (&scm_class_foreign_class, "<foreign-class>", |
| 2242 | scm_class_class, scm_class_class, |
| 2243 | SCM_LIST2 (SCM_LIST3 (Intern ("constructor"), |
| 2244 | k_class, |
| 2245 | scm_class_opaque), |
| 2246 | SCM_LIST3 (Intern ("destructor"), |
| 2247 | k_class, |
| 2248 | scm_class_opaque))); |
| 2249 | make_stdcls (&scm_class_foreign_object, "<foreign-object>", |
| 2250 | scm_class_foreign_class, scm_class_object, SCM_EOL); |
| 2251 | SCM_SET_CLASS_FLAGS (scm_class_foreign_object, SCM_CLASSF_FOREIGN); |
| 2252 | |
| 2253 | /* scm_class_generic functions classes */ |
| 2254 | make_stdcls (&scm_class_procedure_class, "<procedure-class>", |
| 2255 | scm_class_class, scm_class_class, SCM_EOL); |
| 2256 | make_stdcls (&scm_class_entity_class, "<entity-class>", |
| 2257 | scm_class_class, scm_class_procedure_class, SCM_EOL); |
| 2258 | make_stdcls (&scm_class_operator_class, "<operator-class>", |
| 2259 | scm_class_class, scm_class_procedure_class, SCM_EOL); |
| 2260 | make_stdcls (&scm_class_operator_with_setter_class, |
| 2261 | "<operator-with-setter-class>", |
| 2262 | scm_class_class, scm_class_operator_class, SCM_EOL); |
| 2263 | make_stdcls (&scm_class_method, "<method>", |
| 2264 | scm_class_class, scm_class_object, method_slots); |
| 2265 | make_stdcls (&scm_class_simple_method, "<simple-method>", |
| 2266 | scm_class_class, scm_class_method, SCM_EOL); |
| 2267 | SCM_SET_CLASS_FLAGS (scm_class_simple_method, SCM_CLASSF_SIMPLE_METHOD); |
| 2268 | make_stdcls (&scm_class_accessor, "<accessor-method>", |
| 2269 | scm_class_class, scm_class_simple_method, amethod_slots); |
| 2270 | SCM_SET_CLASS_FLAGS (scm_class_accessor, SCM_CLASSF_ACCESSOR_METHOD); |
| 2271 | make_stdcls (&scm_class_entity, "<entity>", |
| 2272 | scm_class_entity_class, scm_class_object, SCM_EOL); |
| 2273 | make_stdcls (&scm_class_entity_with_setter, "<entity-with-setter>", |
| 2274 | scm_class_entity_class, scm_class_entity, SCM_EOL); |
| 2275 | make_stdcls (&scm_class_generic, "<generic>", |
| 2276 | scm_class_entity_class, scm_class_entity, gf_slots); |
| 2277 | SCM_SET_CLASS_FLAGS (scm_class_generic, SCM_CLASSF_PURE_GENERIC); |
| 2278 | make_stdcls (&scm_class_generic_with_setter, "<generic-with-setter>", |
| 2279 | scm_class_entity_class, |
| 2280 | SCM_LIST2 (scm_class_generic, scm_class_entity_with_setter), |
| 2281 | SCM_EOL); |
| 2282 | #if 0 |
| 2283 | /* Patch cpl since compute_cpl doesn't support multiple inheritance. */ |
| 2284 | SCM_SLOT (scm_class_generic_with_setter, scm_si_cpl) = |
| 2285 | scm_append (SCM_LIST3 (SCM_LIST2 (scm_class_generic_with_setter, |
| 2286 | scm_class_generic), |
| 2287 | SCM_SLOT (scm_class_entity_with_setter, |
| 2288 | scm_si_cpl), |
| 2289 | SCM_EOL)); |
| 2290 | #endif |
| 2291 | SCM_SET_CLASS_FLAGS (scm_class_generic_with_setter, SCM_CLASSF_PURE_GENERIC); |
| 2292 | |
| 2293 | /* Primitive types classes */ |
| 2294 | make_stdcls (&scm_class_boolean, "<boolean>", |
| 2295 | scm_class_class, scm_class_top, SCM_EOL); |
| 2296 | make_stdcls (&scm_class_char, "<char>", |
| 2297 | scm_class_class, scm_class_top, SCM_EOL); |
| 2298 | make_stdcls (&scm_class_list, "<list>", |
| 2299 | scm_class_class, scm_class_top, SCM_EOL); |
| 2300 | make_stdcls (&scm_class_pair, "<pair>", |
| 2301 | scm_class_class, scm_class_list, SCM_EOL); |
| 2302 | make_stdcls (&scm_class_null, "<null>", |
| 2303 | scm_class_class, scm_class_list, SCM_EOL); |
| 2304 | make_stdcls (&scm_class_string, "<string>", |
| 2305 | scm_class_class, scm_class_top, SCM_EOL); |
| 2306 | make_stdcls (&scm_class_symbol, "<symbol>", |
| 2307 | scm_class_class, scm_class_top, SCM_EOL); |
| 2308 | make_stdcls (&scm_class_vector, "<vector>", |
| 2309 | scm_class_class, scm_class_top, SCM_EOL); |
| 2310 | make_stdcls (&scm_class_number, "<number>", |
| 2311 | scm_class_class, scm_class_top, SCM_EOL); |
| 2312 | make_stdcls (&scm_class_complex, "<complex>", |
| 2313 | scm_class_class, scm_class_number, SCM_EOL); |
| 2314 | make_stdcls (&scm_class_real, "<real>", |
| 2315 | scm_class_class, scm_class_complex, SCM_EOL); |
| 2316 | make_stdcls (&scm_class_integer, "<integer>", |
| 2317 | scm_class_class, scm_class_real, SCM_EOL); |
| 2318 | make_stdcls (&scm_class_keyword, "<keyword>", |
| 2319 | scm_class_class, scm_class_top, SCM_EOL); |
| 2320 | make_stdcls (&scm_class_unknown, "<unknown>", |
| 2321 | scm_class_class, scm_class_top, SCM_EOL); |
| 2322 | make_stdcls (&scm_class_procedure, "<procedure>", |
| 2323 | scm_class_procedure_class, scm_class_top, SCM_EOL); |
| 2324 | make_stdcls (&scm_class_procedure_with_setter, "<procedure-with-setter>", |
| 2325 | scm_class_procedure_class, scm_class_procedure, SCM_EOL); |
| 2326 | make_stdcls (&scm_class_primitive_generic, "<primitive-generic>", |
| 2327 | scm_class_procedure_class, scm_class_procedure, SCM_EOL); |
| 2328 | make_stdcls (&scm_class_port, "<port>", |
| 2329 | scm_class_class, scm_class_top, SCM_EOL); |
| 2330 | make_stdcls (&scm_class_input_port, "<input-port>", |
| 2331 | scm_class_class, scm_class_port, SCM_EOL); |
| 2332 | make_stdcls (&scm_class_output_port, "<output-port>", |
| 2333 | scm_class_class, scm_class_port, SCM_EOL); |
| 2334 | make_stdcls (&scm_class_input_output_port, "<input-output-port>", |
| 2335 | scm_class_class, |
| 2336 | SCM_LIST2 (scm_class_input_port, scm_class_output_port), |
| 2337 | SCM_EOL); |
| 2338 | } |
| 2339 | |
| 2340 | /********************************************************************** |
| 2341 | * |
| 2342 | * Smob classes |
| 2343 | * |
| 2344 | **********************************************************************/ |
| 2345 | |
| 2346 | static SCM |
| 2347 | make_class_from_template (char *template, char *type_name, SCM supers) |
| 2348 | { |
| 2349 | SCM class, name; |
| 2350 | if (type_name) |
| 2351 | { |
| 2352 | char buffer[100]; |
| 2353 | sprintf (buffer, template, type_name); |
| 2354 | name = Intern (buffer); |
| 2355 | } |
| 2356 | else |
| 2357 | name = SCM_GOOPS_UNBOUND; |
| 2358 | |
| 2359 | class = scm_permanent_object (scm_basic_make_class (scm_class_class, |
| 2360 | name, |
| 2361 | supers, |
| 2362 | SCM_EOL)); |
| 2363 | |
| 2364 | /* Only define name if doesn't already exist. */ |
| 2365 | if (!SCM_GOOPS_UNBOUNDP (name) |
| 2366 | && SCM_FALSEP (scm_apply (scm_goops_lookup_closure, |
| 2367 | SCM_LIST2 (name, SCM_BOOL_F), |
| 2368 | SCM_EOL))) |
| 2369 | { |
| 2370 | /* Make sure we add the binding in the GOOPS module. |
| 2371 | * This kludge is needed until DEFVAR ceases to use `define-public' |
| 2372 | * or `define-public' ceases to use `current-module'. |
| 2373 | */ |
| 2374 | SCM old_module = scm_select_module (scm_module_goops); |
| 2375 | DEFVAR (name, class); |
| 2376 | scm_select_module (old_module); |
| 2377 | } |
| 2378 | return class; |
| 2379 | } |
| 2380 | |
| 2381 | SCM |
| 2382 | scm_make_extended_class (char *type_name) |
| 2383 | { |
| 2384 | return make_class_from_template ("<%s>", |
| 2385 | type_name, |
| 2386 | SCM_LIST1 (scm_class_top)); |
| 2387 | } |
| 2388 | |
| 2389 | static void |
| 2390 | create_smob_classes (void) |
| 2391 | { |
| 2392 | int i; |
| 2393 | |
| 2394 | scm_smob_class = (SCM *) malloc (255 * sizeof (SCM)); |
| 2395 | for (i = 0; i < 255; ++i) |
| 2396 | scm_smob_class[i] = 0; |
| 2397 | |
| 2398 | scm_smob_class[SCM_TC2SMOBNUM (scm_tc16_big)] = scm_class_integer; |
| 2399 | scm_smob_class[SCM_TC2SMOBNUM (scm_tc16_real)] = scm_class_real; |
| 2400 | scm_smob_class[SCM_TC2SMOBNUM (scm_tc16_complex)] = scm_class_complex; |
| 2401 | scm_smob_class[SCM_TC2SMOBNUM (scm_tc16_keyword)] = scm_class_keyword; |
| 2402 | |
| 2403 | for (i = 0; i < scm_numsmob; ++i) |
| 2404 | if (!scm_smob_class[i]) |
| 2405 | scm_smob_class[i] = scm_make_extended_class (SCM_SMOBNAME (i)); |
| 2406 | } |
| 2407 | |
| 2408 | void |
| 2409 | scm_make_port_classes (int ptobnum, char *type_name) |
| 2410 | { |
| 2411 | SCM c, class = make_class_from_template ("<%s-port>", |
| 2412 | type_name, |
| 2413 | SCM_LIST1 (scm_class_port)); |
| 2414 | scm_port_class[SCM_IN_PCLASS_INDEX + ptobnum] |
| 2415 | = make_class_from_template ("<%s-input-port>", |
| 2416 | type_name, |
| 2417 | SCM_LIST2 (class, scm_class_input_port)); |
| 2418 | scm_port_class[SCM_OUT_PCLASS_INDEX + ptobnum] |
| 2419 | = make_class_from_template ("<%s-output-port>", |
| 2420 | type_name, |
| 2421 | SCM_LIST2 (class, scm_class_output_port)); |
| 2422 | scm_port_class[SCM_INOUT_PCLASS_INDEX + ptobnum] |
| 2423 | = c |
| 2424 | = make_class_from_template ("<%s-input-output-port>", |
| 2425 | type_name, |
| 2426 | SCM_LIST2 (class, |
| 2427 | scm_class_input_output_port)); |
| 2428 | /* Patch cpl (since this tree is too complex for the C level compute-cpl) */ |
| 2429 | SCM_SLOT (c, scm_si_cpl) |
| 2430 | = scm_cons2 (c, class, SCM_SLOT (scm_class_input_output_port, scm_si_cpl)); |
| 2431 | } |
| 2432 | |
| 2433 | static void |
| 2434 | create_port_classes (void) |
| 2435 | { |
| 2436 | int i; |
| 2437 | |
| 2438 | scm_port_class = (SCM *) malloc (3 * 256 * sizeof (SCM)); |
| 2439 | for (i = 0; i < 3 * 256; ++i) |
| 2440 | scm_port_class[i] = 0; |
| 2441 | |
| 2442 | for (i = 0; i < scm_numptob; ++i) |
| 2443 | scm_make_port_classes (i, SCM_PTOBNAME (i)); |
| 2444 | } |
| 2445 | |
| 2446 | static SCM |
| 2447 | make_struct_class (void *closure, SCM key, SCM data, SCM prev) |
| 2448 | { |
| 2449 | if (SCM_NFALSEP (SCM_STRUCT_TABLE_NAME (data))) |
| 2450 | SCM_SET_STRUCT_TABLE_CLASS (data, |
| 2451 | scm_make_extended_class |
| 2452 | (SCM_SYMBOL_CHARS (SCM_STRUCT_TABLE_NAME (data)))); |
| 2453 | return SCM_UNSPECIFIED; |
| 2454 | } |
| 2455 | |
| 2456 | static void |
| 2457 | create_struct_classes (void) |
| 2458 | { |
| 2459 | scm_internal_hash_fold (make_struct_class, 0, SCM_BOOL_F, scm_struct_table); |
| 2460 | } |
| 2461 | |
| 2462 | /********************************************************************** |
| 2463 | * |
| 2464 | * C interface |
| 2465 | * |
| 2466 | **********************************************************************/ |
| 2467 | |
| 2468 | void |
| 2469 | scm_load_goops () |
| 2470 | { |
| 2471 | if (!goops_loaded_p) |
| 2472 | scm_resolve_module (scm_read_0str ("(oop goops)")); |
| 2473 | } |
| 2474 | |
| 2475 | SCM |
| 2476 | scm_make_foreign_object (SCM class, SCM initargs) |
| 2477 | { |
| 2478 | void * (*constructor) (SCM) |
| 2479 | = (void * (*) (SCM)) SCM_SLOT (class, scm_si_constructor); |
| 2480 | SCM_ASSERT (constructor != 0, class, "Can't make instances of this class", |
| 2481 | s_make); |
| 2482 | return scm_wrap_object (class, constructor (initargs)); |
| 2483 | } |
| 2484 | |
| 2485 | static size_t |
| 2486 | scm_free_foreign_object (SCM *class, SCM *data) |
| 2487 | { |
| 2488 | size_t (*destructor) (void *) |
| 2489 | = (size_t (*) (void *)) class[scm_si_destructor]; |
| 2490 | return destructor (data); |
| 2491 | } |
| 2492 | |
| 2493 | SCM |
| 2494 | scm_make_class (SCM meta, char *s_name, SCM supers, size_t size, |
| 2495 | void * (*constructor) (SCM initargs), |
| 2496 | size_t (*destructor) (void *)) |
| 2497 | { |
| 2498 | SCM name, class; |
| 2499 | name = Intern (s_name); |
| 2500 | if (SCM_IMP (supers)) |
| 2501 | supers = SCM_LIST1 (scm_class_foreign_object); |
| 2502 | class = scm_basic_basic_make_class (meta, name, supers, SCM_EOL); |
| 2503 | scm_sys_inherit_magic_x (class, supers); |
| 2504 | |
| 2505 | if (destructor != 0) |
| 2506 | { |
| 2507 | SCM_SLOT (class, scm_si_destructor) = (SCM) destructor; |
| 2508 | SCM_SET_CLASS_DESTRUCTOR (class, scm_free_foreign_object); |
| 2509 | } |
| 2510 | else if (size > 0) |
| 2511 | { |
| 2512 | SCM_SET_CLASS_DESTRUCTOR (class, scm_struct_free_light); |
| 2513 | SCM_SET_CLASS_INSTANCE_SIZE (class, size); |
| 2514 | } |
| 2515 | |
| 2516 | SCM_SLOT (class, scm_si_layout) = SCM_CAR (scm_intern ("", 0)); |
| 2517 | SCM_SLOT (class, scm_si_constructor) = (SCM) constructor; |
| 2518 | |
| 2519 | return class; |
| 2520 | } |
| 2521 | |
| 2522 | SCM_SYMBOL (sym_o, "o"); |
| 2523 | SCM_SYMBOL (sym_x, "x"); |
| 2524 | |
| 2525 | SCM_KEYWORD (k_accessor, "accessor"); |
| 2526 | SCM_KEYWORD (k_getter, "getter"); |
| 2527 | |
| 2528 | static SCM |
| 2529 | default_setter (SCM obj, SCM c) |
| 2530 | { |
| 2531 | scm_misc_error ("slot-set!", "read-only slot", SCM_EOL); |
| 2532 | return 0; |
| 2533 | } |
| 2534 | |
| 2535 | void |
| 2536 | scm_add_slot (SCM class, char *slot_name, SCM slot_class, |
| 2537 | SCM (*getter) (SCM obj), |
| 2538 | SCM (*setter) (SCM obj, SCM x), |
| 2539 | char *accessor_name) |
| 2540 | { |
| 2541 | { |
| 2542 | SCM get = scm_make_subr_opt ("goops:get", scm_tc7_subr_1, getter, 0); |
| 2543 | SCM set = scm_make_subr_opt ("goops:set", scm_tc7_subr_2, |
| 2544 | setter ? setter : default_setter, 0); |
| 2545 | SCM getm = scm_closure (SCM_LIST2 (SCM_LIST1 (sym_o), |
| 2546 | SCM_LIST2 (get, sym_o)), |
| 2547 | SCM_EOL); |
| 2548 | SCM setm = scm_closure (SCM_LIST2 (SCM_LIST2 (sym_o, sym_x), |
| 2549 | SCM_LIST3 (set, sym_o, sym_x)), |
| 2550 | SCM_EOL); |
| 2551 | { |
| 2552 | SCM name = SCM_CAR (scm_intern0 (slot_name)); |
| 2553 | SCM aname = SCM_CAR (scm_intern0 (accessor_name)); |
| 2554 | SCM gf = scm_ensure_accessor (aname); |
| 2555 | SCM slot = SCM_LIST5 (name, |
| 2556 | k_class, slot_class, |
| 2557 | setter ? k_accessor : k_getter, |
| 2558 | gf); |
| 2559 | SCM gns = SCM_LIST4 (name, SCM_BOOL_F, get, set); |
| 2560 | |
| 2561 | scm_add_method (gf, scm_make (SCM_LIST5 (scm_class_accessor, |
| 2562 | k_specializers, |
| 2563 | SCM_LIST1 (class), |
| 2564 | k_procedure, getm))); |
| 2565 | scm_add_method (scm_setter (gf), |
| 2566 | scm_make (SCM_LIST5 (scm_class_accessor, |
| 2567 | k_specializers, |
| 2568 | SCM_LIST2 (class, |
| 2569 | scm_class_top), |
| 2570 | k_procedure, setm))); |
| 2571 | DEFVAR (aname, gf); |
| 2572 | |
| 2573 | SCM_SLOT (class, scm_si_slots) |
| 2574 | = scm_append_x (SCM_LIST2 (SCM_SLOT (class, scm_si_slots), |
| 2575 | SCM_LIST1 (slot))); |
| 2576 | SCM_SLOT (class, scm_si_getters_n_setters) |
| 2577 | = scm_append_x (SCM_LIST2 (SCM_SLOT (class, scm_si_getters_n_setters), |
| 2578 | SCM_LIST1 (gns))); |
| 2579 | } |
| 2580 | } |
| 2581 | { |
| 2582 | int n = SCM_INUM (SCM_SLOT (class, scm_si_nfields)); |
| 2583 | |
| 2584 | SCM_SLOT (class, scm_si_nfields) |
| 2585 | = SCM_MAKINUM (n + 1); |
| 2586 | } |
| 2587 | } |
| 2588 | |
| 2589 | SCM |
| 2590 | scm_wrap_object (SCM class, void *data) |
| 2591 | { |
| 2592 | SCM z; |
| 2593 | SCM_NEWCELL2 (z); |
| 2594 | SCM_SETCDR (z, (SCM) data); |
| 2595 | SCM_SET_STRUCT_GC_CHAIN (z, 0); |
| 2596 | SCM_SETCAR (z, SCM_UNPACK (SCM_CDR (class)) | scm_tc3_cons_gloc); |
| 2597 | return z; |
| 2598 | } |
| 2599 | |
| 2600 | SCM scm_components; |
| 2601 | |
| 2602 | SCM |
| 2603 | scm_wrap_component (SCM class, SCM container, void *data) |
| 2604 | { |
| 2605 | SCM obj = scm_wrap_object (class, data); |
| 2606 | SCM handle = scm_hash_fn_create_handle_x (scm_components, |
| 2607 | obj, |
| 2608 | SCM_BOOL_F, |
| 2609 | scm_struct_ihashq, |
| 2610 | scm_sloppy_assq, |
| 2611 | 0); |
| 2612 | SCM_SETCDR (handle, container); |
| 2613 | return obj; |
| 2614 | } |
| 2615 | |
| 2616 | SCM |
| 2617 | scm_ensure_accessor (SCM name) |
| 2618 | { |
| 2619 | SCM gf = scm_apply (SCM_TOP_LEVEL_LOOKUP_CLOSURE, |
| 2620 | SCM_LIST2 (name, SCM_BOOL_F), |
| 2621 | SCM_EOL); |
| 2622 | if (!SCM_IS_A_P (gf, scm_class_generic_with_setter)) |
| 2623 | { |
| 2624 | gf = scm_make (SCM_LIST3 (scm_class_generic, k_name, name)); |
| 2625 | gf = scm_make (SCM_LIST5 (scm_class_generic_with_setter, |
| 2626 | k_name, name, |
| 2627 | k_setter, gf)); |
| 2628 | } |
| 2629 | return gf; |
| 2630 | } |
| 2631 | |
| 2632 | SCM_SYMBOL (sym_internal_add_method_x, "internal-add-method!"); |
| 2633 | |
| 2634 | void |
| 2635 | scm_add_method (SCM gf, SCM m) |
| 2636 | { |
| 2637 | scm_i_eval (SCM_LIST3 (sym_internal_add_method_x, gf, m), |
| 2638 | scm_top_level_env (scm_goops_lookup_closure)); |
| 2639 | } |
| 2640 | |
| 2641 | #ifdef GUILE_DEBUG |
| 2642 | /* |
| 2643 | * Debugging utilities |
| 2644 | */ |
| 2645 | |
| 2646 | SCM_PROC (s_pure_generic_p, "pure-generic?", 1, 0, 0, scm_pure_generic_p); |
| 2647 | |
| 2648 | SCM |
| 2649 | scm_pure_generic_p (SCM obj) |
| 2650 | { |
| 2651 | return (SCM_NIMP (obj) && SCM_STRUCTP (obj) && SCM_PUREGENERICP (obj) |
| 2652 | ? SCM_BOOL_T |
| 2653 | : SCM_BOOL_F); |
| 2654 | } |
| 2655 | |
| 2656 | #endif /* GUILE_DEBUG */ |
| 2657 | |
| 2658 | /* |
| 2659 | * Initialization |
| 2660 | */ |
| 2661 | |
| 2662 | SCM_PROC (scm_sys_goops_loaded, "%goops-loaded", 0, 0, 0, sys_goops_loaded); |
| 2663 | |
| 2664 | static SCM |
| 2665 | sys_goops_loaded () |
| 2666 | { |
| 2667 | goops_loaded_p = 1; |
| 2668 | var_compute_applicable_methods |
| 2669 | = SCM_CDR (scm_apply (scm_goops_lookup_closure, |
| 2670 | SCM_LIST2 (SCM_CAR (var_compute_applicable_methods), |
| 2671 | SCM_BOOL_F), |
| 2672 | SCM_EOL)); |
| 2673 | return SCM_UNSPECIFIED; |
| 2674 | } |
| 2675 | |
| 2676 | SCM scm_module_goops; |
| 2677 | |
| 2678 | void |
| 2679 | scm_init_goops (void) |
| 2680 | { |
| 2681 | SCM old_module; |
| 2682 | scm_module_goops = scm_make_module (scm_read_0str ("(oop goops)")); |
| 2683 | old_module = scm_select_module (scm_module_goops); |
| 2684 | |
| 2685 | scm_goops_lookup_closure = scm_module_lookup_closure (scm_module_goops); |
| 2686 | |
| 2687 | scm_components = scm_permanent_object (scm_make_weak_key_hash_table |
| 2688 | (SCM_MAKINUM (37))); |
| 2689 | |
| 2690 | goops_rstate = scm_c_make_rstate ("GOOPS", 5); |
| 2691 | |
| 2692 | #ifndef SCM_MAGIC_SNARFER |
| 2693 | #include "libguile/goops.x" |
| 2694 | #endif |
| 2695 | |
| 2696 | list_of_no_method = scm_permanent_object (SCM_LIST1 (sym_no_method)); |
| 2697 | |
| 2698 | hell = scm_must_malloc (hell_size, "hell"); |
| 2699 | #ifdef USE_THREADS |
| 2700 | scm_mutex_init (&hell_mutex); |
| 2701 | #endif |
| 2702 | |
| 2703 | create_basic_classes (); |
| 2704 | create_standard_classes (); |
| 2705 | create_smob_classes (); |
| 2706 | create_struct_classes (); |
| 2707 | create_port_classes (); |
| 2708 | |
| 2709 | { |
| 2710 | SCM name = SCM_CAR (scm_intern0 ("no-applicable-method")); |
| 2711 | scm_no_applicable_method |
| 2712 | = scm_permanent_object (scm_make (SCM_LIST3 (scm_class_generic, |
| 2713 | k_name, |
| 2714 | name))); |
| 2715 | DEFVAR (name, scm_no_applicable_method); |
| 2716 | } |
| 2717 | |
| 2718 | scm_select_module (old_module); |
| 2719 | } |
| 2720 | |
| 2721 | void |
| 2722 | scm_init_oop_goops_goopscore_module () |
| 2723 | { |
| 2724 | scm_register_module_xxx ("oop goops goopscore", (void *) scm_init_goops); |
| 2725 | } |
| 2726 | |
| 2727 | /* |
| 2728 | Local Variables: |
| 2729 | c-file-style: "gnu" |
| 2730 | End: |
| 2731 | */ |