libguile/goops.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_GOOPS_H
   4 #define SCM_GOOPS_H
   5
   6 /* Copyright (C) 1998,1999,2000,2001,2002,2003, 2006, 2008, 2009 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  */
  23
  24 \f
  25
  26 /* This software is a derivative work of other copyrighted softwares; the
  27  * copyright notices of these softwares are placed in the file COPYRIGHTS
  28  *
  29  * This file is based upon stklos.h from the STk distribution by
  30  * Erick Gallesio <eg@unice.fr>.
  31  */
  32
  33 #include "libguile/__scm.h"
  34
  35 #include "libguile/validate.h"
  36
  37 /*
  38  * scm_class_class
  39  */
  40
  41 #define SCM_CLASS_CLASS_LAYOUT "prsrpwpopopwururururururururpwpwpwpwpwpwpwpwpwpwpwpw"
  42
  43 #define scm_si_layout             0 /* the struct layout */
  44 #define scm_si_vtable             1
  45 #define scm_si_print              2 /* the struct print closure */
  46 #define scm_si_proc               3
  47 #define scm_si_setter             4
  48
  49 #define scm_si_goops_fields       5
  50 #define scm_si_redefined          5    /* The class to which class was redefined. */
  51 #define scm_si_hashsets           6
  52
  53 #define scm_si_name              14 /* a symbol */
  54 #define scm_si_direct_supers     15 /* (class ...) */
  55 #define scm_si_direct_slots      16 /* ((name . options) ...) */
  56 #define scm_si_direct_subclasses 17 /* (class ...) */
  57 #define scm_si_direct_methods    18 /* (methods ...) */
  58 #define scm_si_cpl               19 /* (class ...) */
  59 #define scm_si_slotdef_class     20
  60 #define scm_si_slots             21 /* ((name . options) ...) */
  61 #define scm_si_name_access       22
  62 #define scm_si_getters_n_setters scm_si_name_access
  63 #define scm_si_keyword_access    23
  64 #define scm_si_nfields           24 /* an integer */
  65 #define scm_si_environment       25 /* The environment in which class is built  */
  66 #define SCM_N_CLASS_SLOTS        26
  67
  68 typedef struct scm_t_method {
  69   SCM generic_function;
  70   SCM specializers;
  71   SCM procedure;
  72 } scm_t_method;
  73
  74 #define SCM_METHOD(obj) ((scm_t_method *) SCM_STRUCT_DATA (obj))
  75
  76 /* {Class flags}
  77  *
  78  * These are used for efficient identification of instances of a
  79  * certain class or its subclasses when traversal of the inheritance
  80  * graph would be too costly.
  81  */
  82 #define SCM_CLASS_FLAGS(class) (SCM_STRUCT_DATA (class) [scm_struct_i_flags])
  83 #define SCM_OBJ_CLASS_FLAGS(obj) (SCM_STRUCT_VTABLE_DATA (obj) [scm_struct_i_flags])
  84 #define SCM_SET_CLASS_FLAGS(c, f) (SCM_CLASS_FLAGS (c) |= (f))
  85 #define SCM_CLEAR_CLASS_FLAGS(c, f) (SCM_CLASS_FLAGS (c) &= ~(f))
  86 #define SCM_CLASSF_MASK SCM_STRUCTF_MASK
  87
  88 #define SCM_CLASSF_SIMPLE_METHOD    (0x004 << 20)
  89 #define SCM_CLASSF_ACCESSOR_METHOD  (0x008 << 20)
  90 #define SCM_CLASSF_PURE_GENERIC SCM_STRUCTF_GOOPS_HACK
  91 #define SCM_CLASSF_FOREIGN          (0x020 << 20)
  92 #define SCM_CLASSF_METACLASS        (0x040 << 20)
  93 #define SCM_CLASSF_GOOPS_VALID  (0x080 << 20)
  94 #define SCM_CLASSF_GOOPS        (0x100 << 20)
  95 #define SCM_CLASSF_GOOPS_OR_VALID (SCM_CLASSF_GOOPS | SCM_CLASSF_GOOPS_VALID)
  96
  97 #define SCM_CLASSF_INHERIT       (~(SCM_CLASSF_PURE_GENERIC \
  98                                     | SCM_CLASSF_SIMPLE_METHOD \
  99                                     | SCM_CLASSF_ACCESSOR_METHOD \
 100                                     | SCM_STRUCTF_LIGHT) \
 101                                   & SCM_CLASSF_MASK)
 102
 103 #define SCM_CLASS_OF(x)         SCM_STRUCT_VTABLE (x)
 104 #define SCM_OBJ_CLASS_REDEF(x)  (SCM_PACK (SCM_STRUCT_VTABLE_DATA (x) [scm_si_redefined]))
 105 #define SCM_INST(x)            SCM_STRUCT_DATA (x)
 106
 107 #define SCM_CLASS_OF(x)        SCM_STRUCT_VTABLE (x)
 108 #define SCM_ACCESSORS_OF(x)    (SCM_PACK (SCM_STRUCT_VTABLE_DATA (x)[scm_si_getters_n_setters]))
 109
 110 #define SCM_CLASSP(x) \
 111   (SCM_STRUCTP (x) && SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_METACLASS)
 112 #define SCM_VALIDATE_CLASS(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, CLASSP, "class")
 113
 114 #define SCM_INSTANCEP(x) \
 115   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_GOOPS))
 116 #define SCM_VALIDATE_INSTANCE(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, INSTANCEP, "instance")
 117
 118 #define SCM_PUREGENERICP(x) \
 119   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_PURE_GENERIC))
 120 #define SCM_VALIDATE_PUREGENERIC(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, PUREGENERICP, "pure generic function")
 121
 122 #define SCM_ACCESSORP(x) \
 123   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_ACCESSOR_METHOD))
 124 #define SCM_VALIDATE_ACCESSOR(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, ACCESSORP, "accessor")
 125
 126 #define SCM_SLOT(x, i)         (SCM_PACK (SCM_INST (x) [i]))
 127 #define SCM_SET_SLOT(x, i, v)  (SCM_INST (x) [i] = SCM_UNPACK (v))
 128 #define SCM_INSTANCE_HASH(c, i) (SCM_INST (c) [scm_si_hashsets + (i)])
 129 #define SCM_SET_HASHSET(c, i, h)  (SCM_INST (c) [scm_si_hashsets + (i)] = (h))
 130
 131 #define SCM_SUBCLASSP(c1, c2)  (scm_is_true (scm_c_memq (c2, SCM_SLOT (c1, scm_si_cpl))))
 132 #define SCM_IS_A_P(x, c) \
 133   (SCM_INSTANCEP (x) && SCM_SUBCLASSP (SCM_CLASS_OF (x), c))
 134
 135 #define SCM_GENERICP(x) \
 136   (SCM_INSTANCEP (x) && SCM_SUBCLASSP (SCM_CLASS_OF (x), scm_class_generic))
 137 #define SCM_VALIDATE_GENERIC(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, GENERICP, "generic function")
 138
 139 #define SCM_METHODP(x) \
 140   (SCM_INSTANCEP (x) && SCM_SUBCLASSP (SCM_CLASS_OF (x), scm_class_method))
 141 #define SCM_VALIDATE_METHOD(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, METHODP, "method")
 142
 143 #define SCM_SET_CLASS_DESTRUCTOR(c, d) SCM_SET_VTABLE_DESTRUCTOR (c, d)
 144
 145 #define SCM_GENERIC_METHOD_CACHE(G) (SCM_PACK (SCM_STRUCT_DATA (G) [scm_struct_i_procedure]))
 146 #define SCM_SET_GENERIC_METHOD_CACHE(G,C) (SCM_STRUCT_DATA (G) [scm_struct_i_procedure] = SCM_UNPACK (C))
 147 #define SCM_GENERIC_SETTER(G) (SCM_PACK (SCM_STRUCT_DATA (G) [scm_struct_i_setter]))
 148 #define SCM_SET_GENERIC_SETTER(G,C) (SCM_STRUCT_DATA (G) [scm_struct_i_setter] = SCM_UNPACK (C))
 149 #define SCM_MCACHE_N_SPECIALIZED(C) SCM_CADDR (C)
 150 #define SCM_SET_MCACHE_N_SPECIALIZED(C, X) SCM_SETCAR (SCM_CDDR (C), X)
 151
 152 #define SCM_INITIAL_MCACHE_SIZE   1
 153
 154 #define scm_si_constructor       SCM_N_CLASS_SLOTS
 155 #define scm_si_destructor        SCM_N_CLASS_SLOTS + 1
 156
 157 #define scm_si_methods           0  /* offset of methods slot in a <generic> */
 158 #define scm_si_n_specialized     1
 159 #define scm_si_used_by           2
 160 #define scm_si_cache_mutex       3
 161
 162 #define scm_si_generic_function  0  /* offset of gf    slot in a <method> */
 163 #define scm_si_specializers      1  /* offset of spec. slot in a <method> */
 164 #define scm_si_procedure         2  /* offset of proc. slot in a <method> */
 165 #define scm_si_code_table        3  /* offset of code. slot in a <method> */
 166 #define scm_si_formals           4  /* offset of form. slot in a <method> */
 167 #define scm_si_body              5  /* offset of body  slot in a <method> */
 168 #define scm_si_make_procedure    6  /* offset of makep.slot in a <method> */
 169
 170 /* C interface */
 171 SCM_API SCM scm_class_boolean;
 172 SCM_API SCM scm_class_char;
 173 SCM_API SCM scm_class_pair;
 174 SCM_API SCM scm_class_procedure;
 175 SCM_API SCM scm_class_string;
 176 SCM_API SCM scm_class_symbol;
 177 SCM_API SCM scm_class_procedure_with_setter;
 178 SCM_API SCM scm_class_primitive_generic;
 179 SCM_API SCM scm_class_vector, scm_class_null;
 180 SCM_API SCM scm_class_real;
 181 SCM_API SCM scm_class_complex;
 182 SCM_API SCM scm_class_integer;
 183 SCM_API SCM scm_class_fraction;
 184 SCM_API SCM scm_class_unknown;
 185 SCM_API SCM scm_port_class[];
 186 SCM_API SCM scm_smob_class[];
 187 SCM_API SCM scm_class_top;
 188 SCM_API SCM scm_class_object;
 189 SCM_API SCM scm_class_class;
 190 SCM_API SCM scm_class_applicable;
 191 SCM_API SCM scm_class_entity;
 192 SCM_API SCM scm_class_entity_with_setter;
 193 SCM_API SCM scm_class_generic;
 194 SCM_API SCM scm_class_generic_with_setter;
 195 SCM_API SCM scm_class_accessor;
 196 SCM_API SCM scm_class_extended_generic;
 197 SCM_API SCM scm_class_extended_generic_with_setter;
 198 SCM_API SCM scm_class_extended_accessor;
 199 SCM_API SCM scm_class_method;
 200 SCM_API SCM scm_class_simple_method;
 201 SCM_API SCM scm_class_accessor_method;
 202 SCM_API SCM scm_class_procedure_class;
 203 SCM_API SCM scm_class_entity_class;
 204 SCM_API SCM scm_class_number;
 205 SCM_API SCM scm_class_list;
 206 SCM_API SCM scm_class_keyword;
 207 SCM_API SCM scm_class_port;
 208 SCM_API SCM scm_class_input_output_port;
 209 SCM_API SCM scm_class_input_port;
 210 SCM_API SCM scm_class_output_port;
 211 SCM_API SCM scm_class_foreign_class;
 212 SCM_API SCM scm_class_foreign_object;
 213 SCM_API SCM scm_class_foreign_slot;
 214 SCM_API SCM scm_class_self;
 215 SCM_API SCM scm_class_protected;
 216 SCM_API SCM scm_class_opaque;
 217 SCM_API SCM scm_class_read_only;
 218 SCM_API SCM scm_class_protected_opaque;
 219 SCM_API SCM scm_class_protected_read_only;
 220 SCM_API SCM scm_class_scm;
 221 SCM_API SCM scm_class_int;
 222 SCM_API SCM scm_class_float;
 223 SCM_API SCM scm_class_double;
 224 SCM_API const char *scm_s_slot_set_x;
 225
 226 SCM_API SCM scm_no_applicable_method;
 227
 228 SCM_API SCM scm_module_goops;
 229
 230 SCM_API SCM scm_goops_version (void);
 231 SCM_API SCM scm_oldfmt (SCM);
 232 SCM_API char *scm_c_oldfmt0 (char *);
 233 SCM_API char *scm_c_oldfmt (char *, int n);
 234 SCM_API void scm_load_goops (void);
 235 SCM_API SCM scm_make_foreign_object (SCM cls, SCM initargs);
 236 SCM_API SCM scm_make_class (SCM meta, char *s_name, SCM supers, size_t size,
 237                             void * (*constructor) (SCM initargs),
 238                             size_t (*destructor) (void *));
 239 SCM_API SCM scm_make_extended_class (char const *type_name, int applicablep);
 240 SCM_API void scm_make_port_classes (long ptobnum, char *type_name);
 241 SCM_API void scm_add_slot (SCM c, char *slot, SCM slot_class,
 242                            SCM (*getter) (SCM obj),
 243                            SCM (*setter) (SCM obj, SCM x),
 244                            char *accessor_name);
 245 SCM_API SCM scm_wrap_object (SCM c, void *);
 246 SCM_API SCM scm_wrap_component (SCM c, SCM obj, void *);
 247 SCM_API SCM scm_ensure_accessor (SCM name);
 248 SCM_API void scm_add_method (SCM gf, SCM m);
 249 SCM_API SCM scm_class_of (SCM obj);
 250
 251 /* Low level functions exported */
 252 SCM_API SCM scm_make_next_method (SCM methods, SCM args, SCM gf);
 253 SCM_API SCM scm_basic_basic_make_class (SCM c, SCM name, SCM dsupers, SCM dslots);
 254 SCM_API SCM scm_basic_make_class (SCM c, SCM name, SCM dsupers, SCM dslots);
 255
 256 /* Primitives exported */
 257 SCM_API SCM scm_sys_allocate_instance (SCM c, SCM initargs);
 258 SCM_API SCM scm_sys_set_object_setter_x (SCM obj, SCM setter);
 259 SCM_API SCM scm_slot_ref (SCM obj, SCM slot_name);
 260 SCM_API SCM scm_slot_set_x (SCM obj, SCM slot_name, SCM value);
 261
 262 SCM_API SCM scm_compute_applicable_methods (SCM gf, SCM args, long len, int scm_find_method);
 263 SCM_API SCM scm_sys_compute_applicable_methods (SCM gf, SCM args);
 264 #ifdef GUILE_DEBUG
 265 SCM_API SCM scm_pure_generic_p (SCM obj);
 266 #endif
 267
 268 SCM_API SCM scm_sys_compute_slots (SCM c);
 269 SCM_INTERNAL void scm_i_inherit_applicable (SCM c);
 270 SCM_INTERNAL SCM scm_i_get_keyword (SCM key, SCM l, long len,
 271                                     SCM default_value, const char *subr);
 272 SCM_API SCM scm_get_keyword (SCM key, SCM l, SCM default_value);
 273 SCM_API SCM scm_sys_initialize_object (SCM obj, SCM initargs);
 274 SCM_API SCM scm_sys_prep_layout_x (SCM c);
 275 SCM_API SCM scm_sys_inherit_magic_x (SCM c, SCM dsupers);
 276 SCM_API SCM scm_instance_p (SCM obj);
 277 SCM_API SCM scm_class_name (SCM obj);
 278 SCM_API SCM scm_class_direct_supers (SCM obj);
 279 SCM_API SCM scm_class_direct_slots (SCM obj);
 280 SCM_API SCM scm_class_direct_subclasses (SCM obj);
 281 SCM_API SCM scm_class_direct_methods (SCM obj);
 282 SCM_API SCM scm_class_precedence_list (SCM obj);
 283 SCM_API SCM scm_class_slots (SCM obj);
 284 SCM_API SCM scm_class_environment (SCM obj);
 285 SCM_API SCM scm_generic_function_name (SCM obj);
 286 SCM_API SCM scm_generic_function_methods (SCM obj);
 287 SCM_API SCM scm_method_generic_function (SCM obj);
 288 SCM_API SCM scm_method_specializers (SCM obj);
 289 SCM_API SCM scm_method_procedure (SCM obj);
 290 SCM_API SCM scm_accessor_method_slot_definition (SCM obj);
 291 SCM_API SCM scm_sys_tag_body (SCM body);
 292 SCM_API SCM scm_sys_fast_slot_ref (SCM obj, SCM index);
 293 SCM_API SCM scm_sys_fast_slot_set_x (SCM obj, SCM index, SCM value);
 294 SCM_API SCM scm_slot_ref_using_class (SCM cls, SCM obj, SCM slot_name);
 295 SCM_API SCM scm_slot_set_using_class_x (SCM cls, SCM obj, SCM slot_name, SCM value);
 296 SCM_API SCM scm_slot_bound_using_class_p (SCM cls, SCM obj, SCM slot_name);
 297 SCM_API SCM scm_slot_exists_using_class_p (SCM cls, SCM obj, SCM slot_name);
 298 SCM_API SCM scm_slot_bound_p (SCM obj, SCM slot_name);
 299 SCM_API SCM scm_slot_exists_p (SCM obj, SCM slot_name);
 300 SCM_API SCM scm_sys_modify_instance (SCM old, SCM newinst);
 301 SCM_API SCM scm_sys_modify_class (SCM old, SCM newcls);
 302 SCM_API SCM scm_sys_invalidate_class (SCM cls);
 303 SCM_API SCM scm_make_method_cache (SCM gf);
 304 SCM_API SCM scm_sys_invalidate_method_cache_x (SCM gf);
 305 SCM_API SCM scm_generic_capability_p (SCM proc);
 306 SCM_API SCM scm_enable_primitive_generic_x (SCM subrs);
 307 SCM_API SCM scm_primitive_generic_generic (SCM subr);
 308 SCM_API void scm_c_extend_primitive_generic (SCM subr, SCM extension);
 309 SCM_API SCM stklos_version (void);
 310 SCM_API SCM scm_make (SCM args);
 311 SCM_API SCM scm_find_method (SCM args);
 312 SCM_API SCM scm_sys_method_more_specific_p (SCM m1, SCM m2, SCM targs);
 313 SCM_API void scm_change_object_class (SCM, SCM, SCM);
 314 SCM_API SCM scm_memoize_method (SCM x, SCM args);
 315 SCM_API SCM scm_mcache_lookup_cmethod (SCM cache, SCM args);
 316 SCM_API SCM scm_mcache_compute_cmethod (SCM cache, SCM args);
 317 /* The following are declared in __scm.h
 318 SCM_API SCM scm_call_generic_0 (SCM gf);
 319 SCM_API SCM scm_call_generic_1 (SCM gf, SCM a1);
 320 SCM_API SCM scm_call_generic_2 (SCM gf, SCM a1, SCM a2);
 321 SCM_API SCM scm_apply_generic (SCM gf, SCM args);
 322 */
 323 SCM_API SCM scm_call_generic_3 (SCM gf, SCM a1, SCM a2, SCM a3);
 324
 325
 326 SCM_INTERNAL SCM scm_init_goops_builtins (void);
 327 SCM_INTERNAL void scm_init_goops (void);
 328
 329 #if (SCM_ENABLE_DEPRECATED == 1)
 330
 331 #define SCM_INST_TYPE(x)       SCM_OBJ_CLASS_FLAGS (x)
 332 #define SCM_SIMPLEMETHODP(x) \
 333   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_SIMPLE_METHOD))
 334 #define SCM_FASTMETHODP(x) \
 335   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) \
 336                        & (SCM_CLASSF_ACCESSOR_METHOD \
 337                           | SCM_CLASSF_SIMPLE_METHOD)))
 338
 339
 340 #endif
 341
 342 #endif  /* SCM_GOOPS_H */
 343
 344 /*
 345   Local Variables:
 346   c-file-style: "gnu"
 347   End:
 348 */