libguile/goops.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_GOOPS_H
   4 #define SCM_GOOPS_H
   5 /* Copyright (C) 1998,1999,2000,2001 Free Software Foundation, Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this software; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307 USA
  21  *
  22  * As a special exception, the Free Software Foundation gives permission
  23  * for additional uses of the text contained in its release of GUILE.
  24  *
  25  * The exception is that, if you link the GUILE library with other files
  26  * to produce an executable, this does not by itself cause the
  27  * resulting executable to be covered by the GNU General Public License.
  28  * Your use of that executable is in no way restricted on account of
  29  * linking the GUILE library code into it.
  30  *
  31  * This exception does not however invalidate any other reasons why
  32  * the executable file might be covered by the GNU General Public License.
  33  *
  34  * This exception applies only to the code released by the
  35  * Free Software Foundation under the name GUILE.  If you copy
  36  * code from other Free Software Foundation releases into a copy of
  37  * GUILE, as the General Public License permits, the exception does
  38  * not apply to the code that you add in this way.  To avoid misleading
  39  * anyone as to the status of such modified files, you must delete
  40  * this exception notice from them.
  41  *
  42  * If you write modifications of your own for GUILE, it is your choice
  43  * whether to permit this exception to apply to your modifications.
  44  * If you do not wish that, delete this exception notice.  */
  45 \f
  46
  47 /* This software is a derivative work of other copyrighted softwares; the
  48  * copyright notices of these softwares are placed in the file COPYRIGHTS
  49  *
  50  * This file is based upon stklos.h from the STk distribution by
  51  * Erick Gallesio <eg@unice.fr>.
  52  */
  53
  54 #include "libguile/__scm.h"
  55
  56 #include "libguile/validate.h"
  57
  58 /*
  59  * scm_class_class
  60  */
  61
  62 #define SCM_CLASS_CLASS_LAYOUT "prsrpwpopopwururururururururpwpwpwpwpwpwpwpwpwpwpwpw"
  63
  64 #define scm_si_layout             0 /* the struct layout */
  65 #define scm_si_vtable             1
  66 #define scm_si_print              2 /* the struct print closure */
  67 #define scm_si_proc               3
  68 #define scm_si_setter             4
  69
  70 #define scm_si_goops_fields       5
  71
  72 /* Defined in libguile/objects.h:
  73 #define scm_si_redefined          5    The class to which class was redefined.
  74 #define scm_si_hashsets           6
  75 */
  76 #define scm_si_name              14 /* a symbol */
  77 #define scm_si_direct_supers     15 /* (class ...) */
  78 #define scm_si_direct_slots      16 /* ((name . options) ...) */
  79 #define scm_si_direct_subclasses 17 /* (class ...) */
  80 #define scm_si_direct_methods    18 /* (methods ...) */
  81 #define scm_si_cpl               19 /* (class ...) */
  82 #define scm_si_slotdef_class     20
  83 #define scm_si_slots             21 /* ((name . options) ...) */
  84 #define scm_si_name_access       22
  85 #define scm_si_keyword_access    23
  86 #define scm_si_nfields           24 /* an integer */
  87 #define scm_si_environment       25 /* The environment in which class is built  */
  88 #define SCM_N_CLASS_SLOTS        26
  89
  90 typedef struct scm_t_method {
  91   SCM generic_function;
  92   SCM specializers;
  93   SCM procedure;
  94 } scm_t_method;
  95
  96 #define SCM_METHOD(obj) ((scm_t_method *) SCM_STRUCT_DATA (obj))
  97
  98 #define SCM_CLASSF_SIMPLE_METHOD    (0x004 << 20)
  99 #define SCM_CLASSF_ACCESSOR_METHOD  (0x008 << 20)
 100
 101 /* Defined in libguile/objects.c */
 102 /* #define SCM_CLASSF_PURE_GENERIC  (0x010 << 20) */
 103
 104 #define SCM_CLASSF_FOREIGN          (0x020 << 20)
 105 #define SCM_CLASSF_METACLASS        (0x040 << 20)
 106
 107 /* Defined in libguile/objects.c */
 108 /* #define SCM_CLASSF_GOOPS_VALID   (0x080 << 20) */
 109 /* #define SCM_CLASSF_GOOPS         (0x100 << 20) */
 110 #define SCM_CLASSF_GOOPS_OR_VALID (SCM_CLASSF_GOOPS | SCM_CLASSF_GOOPS_VALID)
 111
 112 #define SCM_CLASSF_INHERIT       (~(SCM_CLASSF_PURE_GENERIC \
 113                                     | SCM_CLASSF_SIMPLE_METHOD \
 114                                     | SCM_CLASSF_ACCESSOR_METHOD \
 115                                     | SCM_STRUCTF_LIGHT) \
 116                                   & SCM_CLASSF_MASK)
 117
 118 #define SCM_INST(x)            SCM_STRUCT_DATA (x)
 119
 120 /* Also defined in libguile/objects.c */
 121 #define SCM_CLASS_OF(x)        SCM_STRUCT_VTABLE (x)
 122 #define SCM_ACCESSORS_OF(x)    (SCM_PACK (SCM_STRUCT_VTABLE_DATA (x)[scm_si_getters_n_setters]))
 123 #define SCM_NUMBER_OF_SLOTS(x) \
 124  (SCM_UNPACK (SCM_STRUCT_DATA (x)[scm_struct_i_n_words]) \
 125   - scm_struct_n_extra_words)
 126
 127 #define SCM_CLASSP(x) \
 128   (SCM_STRUCTP (x) && SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_METACLASS)
 129 #define SCM_VALIDATE_CLASS(pos, x) SCM_MAKE_VALIDATE (pos, x, CLASSP)
 130
 131 #define SCM_INSTANCEP(x) \
 132   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_GOOPS))
 133 #define SCM_VALIDATE_INSTANCE(pos, x) SCM_MAKE_VALIDATE (pos, x, INSTANCEP)
 134
 135 #define SCM_PUREGENERICP(x) \
 136   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_PURE_GENERIC))
 137 #define SCM_VALIDATE_PUREGENERIC(pos, x) SCM_MAKE_VALIDATE (pos, x, PUREGENERICP)
 138
 139 #define SCM_ACCESSORP(x) \
 140   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_ACCESSOR_METHOD))
 141 #define SCM_VALIDATE_ACCESSOR(pos, x) SCM_MAKE_VALIDATE (pos, x, ACCESSORP)
 142
 143 #define SCM_SLOT(x, i)         (SCM_PACK (SCM_INST (x) [i]))
 144 #define SCM_SET_SLOT(x, i, v)  (SCM_INST (x) [i] = SCM_UNPACK (v))
 145 #define SCM_SET_HASHSET(c, i, h)  (SCM_INST (c) [scm_si_hashsets + (i)] = (h))
 146
 147 #define SCM_SUBCLASSP(c1, c2)  (!SCM_FALSEP (scm_c_memq (c2, SCM_SLOT (c1, scm_si_cpl))))
 148 #define SCM_IS_A_P(x, c) \
 149   (SCM_INSTANCEP (x) && SCM_SUBCLASSP (SCM_CLASS_OF (x), c))
 150
 151 #define SCM_GENERICP(x) \
 152   (SCM_INSTANCEP (x) && SCM_SUBCLASSP (SCM_CLASS_OF (x), scm_class_generic))
 153 #define SCM_VALIDATE_GENERIC(pos, x) SCM_MAKE_VALIDATE (pos, x, GENERICP)
 154
 155 #define SCM_METHODP(x) \
 156   (SCM_INSTANCEP (x) && SCM_SUBCLASSP (SCM_CLASS_OF (x), scm_class_method))
 157 #define SCM_VALIDATE_METHOD(pos, x) SCM_MAKE_VALIDATE (pos, x, METHODP)
 158
 159 #define SCM_MCACHE_N_SPECIALIZED(C) SCM_CADDR (C)
 160 #define SCM_SET_MCACHE_N_SPECIALIZED(C, X) SCM_SETCAR (SCM_CDDR (C), X)
 161
 162 #define SCM_INITIAL_MCACHE_SIZE   1
 163
 164 #define scm_si_getters_n_setters scm_si_name_access
 165
 166 #define scm_si_constructor       SCM_N_CLASS_SLOTS
 167 #define scm_si_destructor        SCM_N_CLASS_SLOTS + 1
 168
 169 #define scm_si_methods           0  /* offset of methods slot in a <generic> */
 170 #define scm_si_n_specialized     1
 171 #define scm_si_used_by           2
 172 #define scm_si_cache_mutex       3
 173
 174 #define scm_si_generic_function  0  /* offset of gf    slot in a <method> */
 175 #define scm_si_specializers      1  /* offset of spec. slot in a <method> */
 176
 177 #define scm_si_procedure         2  /* offset of proc. slot in a <method> */
 178 #define scm_si_code_table        3  /* offset of code. slot in a <method> */
 179
 180 /* C interface */
 181 SCM_API SCM scm_class_top;
 182 SCM_API SCM scm_class_object;
 183 SCM_API SCM scm_class_class;
 184 SCM_API SCM scm_class_entity;
 185 SCM_API SCM scm_class_entity_with_setter;
 186 SCM_API SCM scm_class_generic;
 187 SCM_API SCM scm_class_generic_with_setter;
 188 SCM_API SCM scm_class_method;
 189 SCM_API SCM scm_class_simple_method;
 190 SCM_API SCM scm_class_accessor;
 191 SCM_API SCM scm_class_procedure_class;
 192 SCM_API SCM scm_class_operator_class;
 193 SCM_API SCM scm_class_operator_with_setter_class;
 194 SCM_API SCM scm_class_entity_class;
 195 SCM_API SCM scm_class_number;
 196 SCM_API SCM scm_class_list;
 197 SCM_API SCM scm_class_keyword;
 198 SCM_API SCM scm_class_port;
 199 SCM_API SCM scm_class_input_output_port;
 200 SCM_API SCM scm_class_input_port;
 201 SCM_API SCM scm_class_output_port;
 202 SCM_API SCM scm_class_foreign_class;
 203 SCM_API SCM scm_class_foreign_object;
 204 SCM_API SCM scm_class_foreign_slot;
 205 SCM_API SCM scm_class_self;
 206 SCM_API SCM scm_class_protected;
 207 SCM_API SCM scm_class_opaque;
 208 SCM_API SCM scm_class_read_only;
 209 SCM_API SCM scm_class_protected_opaque;
 210 SCM_API SCM scm_class_protected_read_only;
 211 SCM_API SCM scm_class_scm;
 212 SCM_API SCM scm_class_int;
 213 SCM_API SCM scm_class_float;
 214 SCM_API SCM scm_class_double;
 215 SCM_API const char *scm_s_slot_set_x;
 216
 217 SCM_API SCM scm_module_goops;
 218
 219 SCM_API SCM scm_goops_version (void);
 220 SCM_API SCM scm_oldfmt (SCM);
 221 SCM_API char *scm_c_oldfmt0 (char *);
 222 SCM_API char *scm_c_oldfmt (char *, int n);
 223 SCM_API void scm_load_goops (void);
 224 SCM_API SCM scm_make_foreign_object (SCM cls, SCM initargs);
 225 SCM_API SCM scm_make_class (SCM meta, char *s_name, SCM supers, size_t size,
 226                             void * (*constructor) (SCM initargs),
 227                             size_t (*destructor) (void *));
 228 SCM_API void scm_add_slot (SCM c, char *slot, SCM slot_class,
 229                            SCM (*getter) (SCM obj),
 230                            SCM (*setter) (SCM obj, SCM x),
 231                            char *accessor_name);
 232 SCM_API SCM scm_wrap_object (SCM c, void *);
 233 SCM_API SCM scm_wrap_component (SCM c, SCM obj, void *);
 234 SCM_API SCM scm_ensure_accessor (SCM name);
 235 SCM_API void scm_add_method (SCM gf, SCM m);
 236
 237 /* Low level functions exported */
 238 SCM_API SCM scm_make_next_method (SCM methods, SCM args, SCM gf);
 239 SCM_API SCM scm_basic_basic_make_class (SCM c, SCM name, SCM dsupers, SCM dslots);
 240 SCM_API SCM scm_basic_make_class (SCM c, SCM name, SCM dsupers, SCM dslots);
 241
 242 /* Primitives exported */
 243 SCM_API SCM scm_sys_allocate_instance (SCM c, SCM initargs);
 244 SCM_API SCM scm_sys_set_object_setter_x (SCM obj, SCM setter);
 245 SCM_API SCM scm_slot_ref (SCM obj, SCM slot_name);
 246 SCM_API SCM scm_slot_set_x (SCM obj, SCM slot_name, SCM value);
 247
 248 SCM_API SCM scm_compute_applicable_methods (SCM gf, SCM args, long len, int scm_find_method);
 249 SCM_API SCM scm_sys_compute_applicable_methods (SCM gf, SCM args);
 250 SCM_API SCM scm_m_atslot_ref (SCM xorig, SCM env);
 251 SCM_API SCM scm_m_atslot_set_x (SCM xorig, SCM env);
 252 SCM_API SCM scm_m_atdispatch (SCM xorig, SCM env);
 253 #ifdef GUILE_DEBUG
 254 SCM_API SCM scm_pure_generic_p (SCM obj);
 255 #endif
 256
 257 SCM_API SCM scm_sys_compute_slots (SCM c);
 258 SCM_API SCM scm_i_get_keyword (SCM key, SCM l, long len, SCM default_value, const char *subr);
 259 SCM_API SCM scm_get_keyword (SCM key, SCM l, SCM default_value);
 260 SCM_API SCM scm_sys_initialize_object (SCM obj, SCM initargs);
 261 SCM_API SCM scm_sys_prep_layout_x (SCM c);
 262 SCM_API SCM scm_sys_inherit_magic_x (SCM c, SCM dsupers);
 263 SCM_API SCM scm_instance_p (SCM obj);
 264 SCM_API SCM scm_class_name (SCM obj);
 265 SCM_API SCM scm_class_direct_supers (SCM obj);
 266 SCM_API SCM scm_class_direct_slots (SCM obj);
 267 SCM_API SCM scm_class_direct_subclasses (SCM obj);
 268 SCM_API SCM scm_class_direct_methods (SCM obj);
 269 SCM_API SCM scm_class_precedence_list (SCM obj);
 270 SCM_API SCM scm_class_slots (SCM obj);
 271 SCM_API SCM scm_class_environment (SCM obj);
 272 SCM_API SCM scm_generic_function_name (SCM obj);
 273 SCM_API SCM scm_generic_function_methods (SCM obj);
 274 SCM_API SCM scm_method_generic_function (SCM obj);
 275 SCM_API SCM scm_method_specializers (SCM obj);
 276 SCM_API SCM scm_method_procedure (SCM obj);
 277 SCM_API SCM scm_accessor_method_slot_definition (SCM obj);
 278 SCM_API SCM scm_sys_tag_body (SCM body);
 279 SCM_API SCM scm_sys_fast_slot_ref (SCM obj, SCM index);
 280 SCM_API SCM scm_sys_fast_slot_set_x (SCM obj, SCM index, SCM value);
 281 SCM_API SCM scm_slot_ref_using_class (SCM cls, SCM obj, SCM slot_name);
 282 SCM_API SCM scm_slot_set_using_class_x (SCM cls, SCM obj, SCM slot_name, SCM value);
 283 SCM_API SCM scm_slot_bound_using_class_p (SCM cls, SCM obj, SCM slot_name);
 284 SCM_API SCM scm_slot_exists_using_class_p (SCM cls, SCM obj, SCM slot_name);
 285 SCM_API SCM scm_slot_bound_p (SCM obj, SCM slot_name);
 286 SCM_API SCM scm_slots_exists_p (SCM obj, SCM slot_name);
 287 SCM_API SCM scm_sys_modify_instance (SCM old, SCM newinst);
 288 SCM_API SCM scm_sys_modify_class (SCM old, SCM newcls);
 289 SCM_API SCM scm_sys_invalidate_class (SCM cls);
 290 SCM_API SCM scm_make_method_cache (SCM gf);
 291 SCM_API SCM scm_sys_invalidate_method_cache_x (SCM gf);
 292 SCM_API SCM scm_generic_capability_p (SCM proc);
 293 SCM_API SCM scm_enable_primitive_generic_x (SCM subrs);
 294 SCM_API SCM scm_primitive_generic_generic (SCM subr);
 295 SCM_API SCM stklos_version (void);
 296 SCM_API SCM scm_make (SCM args);
 297 SCM_API SCM scm_find_method (SCM args);
 298 SCM_API SCM scm_sys_method_more_specific_p (SCM m1, SCM m2, SCM targs);
 299
 300 SCM_API SCM scm_init_goops_builtins (void);
 301 SCM_API void scm_init_goops (void);
 302
 303 #if (SCM_DEBUG_DEPRECATED == 0)
 304
 305 #define SCM_INST_TYPE(x)       SCM_OBJ_CLASS_FLAGS (x)
 306 #define SCM_SIMPLEMETHODP(x) \
 307   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_SIMPLE_METHOD))
 308 #define SCM_FASTMETHODP(x) \
 309   (SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) \
 310                        & (SCM_CLASSF_ACCESSOR_METHOD \
 311                           | SCM_CLASSF_SIMPLE_METHOD)))
 312
 313
 314 #endif
 315
 316 #endif /* SCM_GOOPS_H */