X-Git-Url: http://git.hcoop.net/bpt/guile.git/blobdiff_plain/747bd5347d8b36c41809a16cb3f17b23e9afa9bf..c2aa5d9bbad48ceb1acf1c8fa7e5129f9e29892c:/libguile/goops.c diff --git a/libguile/goops.c b/libguile/goops.c dissimilarity index 81% index 355e5efa4..f829695c3 100644 --- a/libguile/goops.c +++ b/libguile/goops.c @@ -1,2856 +1,1164 @@ -/* Copyright (C) 1998,1999,2000,2001,2002,2003,2004,2008,2009,2010,2011,2012 - * Free Software Foundation, Inc. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public License - * as published by the Free Software Foundation; either version 3 of - * the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301 USA - */ - - -/* This software is a derivative work of other copyrighted softwares; the - * copyright notices of these softwares are placed in the file COPYRIGHTS - * - * This file is based upon stklos.c from the STk distribution by - * Erick Gallesio . - */ - -#ifdef HAVE_CONFIG_H -# include -#endif - -#include - -#include "libguile/_scm.h" -#include "libguile/alist.h" -#include "libguile/async.h" -#include "libguile/chars.h" -#include "libguile/debug.h" -#include "libguile/dynl.h" -#include "libguile/dynwind.h" -#include "libguile/eval.h" -#include "libguile/gsubr.h" -#include "libguile/hashtab.h" -#include "libguile/keywords.h" -#include "libguile/macros.h" -#include "libguile/modules.h" -#include "libguile/ports.h" -#include "libguile/procprop.h" -#include "libguile/programs.h" -#include "libguile/random.h" -#include "libguile/root.h" -#include "libguile/smob.h" -#include "libguile/strings.h" -#include "libguile/strports.h" -#include "libguile/vectors.h" -#include "libguile/vm.h" - -#include "libguile/validate.h" -#include "libguile/goops.h" - -#define SPEC_OF(x) SCM_SLOT (x, scm_si_specializers) - -/* Port classes */ -#define SCM_IN_PCLASS_INDEX 0 -#define SCM_OUT_PCLASS_INDEX SCM_I_MAX_PORT_TYPE_COUNT -#define SCM_INOUT_PCLASS_INDEX (2 * SCM_I_MAX_PORT_TYPE_COUNT) - -/* this file is a mess. in theory, though, we shouldn't have many SCM references - -- most of the references should be to vars. */ - -static SCM var_slot_unbound = SCM_BOOL_F; -static SCM var_slot_missing = SCM_BOOL_F; -static SCM var_compute_cpl = SCM_BOOL_F; -static SCM var_no_applicable_method = SCM_BOOL_F; -static SCM var_change_class = SCM_BOOL_F; - -SCM_SYMBOL (sym_slot_unbound, "slot-unbound"); -SCM_SYMBOL (sym_slot_missing, "slot-missing"); -SCM_SYMBOL (sym_compute_cpl, "compute-cpl"); -SCM_SYMBOL (sym_no_applicable_method, "no-applicable-method"); -SCM_SYMBOL (sym_memoize_method_x, "memoize-method!"); -SCM_SYMBOL (sym_change_class, "change-class"); - -SCM_VARIABLE (scm_var_make_extended_generic, "make-extended-generic"); - - -/* Class redefinition protocol: - - A class is represented by a heap header h1 which points to a - malloc:ed memory block m1. - - When a new version of a class is created, a new header h2 and - memory block m2 are allocated. The headers h1 and h2 then switch - pointers so that h1 refers to m2 and h2 to m1. In this way, names - bound to h1 will point to the new class at the same time as h2 will - be a handle which the GC will use to free m1. - - The `redefined' slot of m1 will be set to point to h1. An old - instance will have its class pointer (the CAR of the heap header) - pointing to m1. The non-immediate `redefined'-slot in m1 indicates - the class modification and the new class pointer can be found via - h1. -*/ - -#define TEST_CHANGE_CLASS(obj, class) \ - { \ - class = SCM_CLASS_OF (obj); \ - if (scm_is_true (SCM_OBJ_CLASS_REDEF (obj))) \ - { \ - scm_change_object_class (obj, class, SCM_OBJ_CLASS_REDEF (obj));\ - class = SCM_CLASS_OF (obj); \ - } \ - } - -#define NXT_MTHD_METHODS(m) (SCM_VELTS (m)[1]) -#define NXT_MTHD_ARGS(m) (SCM_VELTS (m)[2]) - -#define SCM_GOOPS_UNBOUND SCM_UNBOUND -#define SCM_GOOPS_UNBOUNDP(x) (scm_is_eq (x, SCM_GOOPS_UNBOUND)) - -static int goops_loaded_p = 0; -static scm_t_rstate *goops_rstate; - -/* These variables are filled in by the object system when loaded. */ -SCM scm_class_boolean, scm_class_char, scm_class_pair; -SCM scm_class_procedure, scm_class_string, scm_class_symbol; -SCM scm_class_primitive_generic; -SCM scm_class_vector, scm_class_null; -SCM scm_class_integer, scm_class_real, scm_class_complex, scm_class_fraction; -SCM scm_class_unknown; -SCM scm_class_top, scm_class_object, scm_class_class; -SCM scm_class_applicable; -SCM scm_class_applicable_struct, scm_class_applicable_struct_with_setter; -SCM scm_class_generic, scm_class_generic_with_setter; -SCM scm_class_accessor; -SCM scm_class_extended_generic, scm_class_extended_generic_with_setter; -SCM scm_class_extended_accessor; -SCM scm_class_method; -SCM scm_class_accessor_method; -SCM scm_class_procedure_class; -SCM scm_class_applicable_struct_class; -SCM scm_class_number, scm_class_list; -SCM scm_class_keyword; -SCM scm_class_port, scm_class_input_output_port; -SCM scm_class_input_port, scm_class_output_port; -SCM scm_class_foreign_slot; -SCM scm_class_self, scm_class_protected; -SCM scm_class_hidden, scm_class_opaque, scm_class_read_only; -SCM scm_class_protected_hidden, scm_class_protected_opaque, scm_class_protected_read_only; -SCM scm_class_scm; -SCM scm_class_int, scm_class_float, scm_class_double; - -static SCM class_foreign; -static SCM class_hashtable; -static SCM class_fluid; -static SCM class_dynamic_state; -static SCM class_frame; -static SCM class_objcode; -static SCM class_vm; -static SCM class_vm_cont; -static SCM class_bytevector; -static SCM class_uvec; -static SCM class_array; -static SCM class_bitvector; - -static SCM vtable_class_map = SCM_BOOL_F; - -/* Port classes. Allocate 3 times the maximum number of port types so that - input ports, output ports, and in/out ports can be stored at different - offsets. See `SCM_IN_PCLASS_INDEX' et al. */ -SCM scm_port_class[3 * SCM_I_MAX_PORT_TYPE_COUNT]; - -/* SMOB classes. */ -SCM scm_smob_class[SCM_I_MAX_SMOB_TYPE_COUNT]; - -SCM scm_no_applicable_method; - -SCM_SYMBOL (scm_sym_define_public, "define-public"); - -static SCM scm_make_unbound (void); -static SCM scm_unbound_p (SCM obj); -static SCM scm_assert_bound (SCM value, SCM obj); -static SCM scm_at_assert_bound_ref (SCM obj, SCM index); -static SCM scm_sys_goops_loaded (void); -static SCM scm_make_extended_class_from_symbol (SCM type_name_sym, - int applicablep); - - -SCM -scm_i_define_class_for_vtable (SCM vtable) -{ - SCM class; - - scm_i_pthread_mutex_lock (&scm_i_misc_mutex); - if (scm_is_false (vtable_class_map)) - vtable_class_map = scm_c_make_weak_table (0, SCM_WEAK_TABLE_KIND_KEY); - scm_i_pthread_mutex_unlock (&scm_i_misc_mutex); - - if (scm_is_false (scm_struct_vtable_p (vtable))) - abort (); - - class = scm_weak_table_refq (vtable_class_map, vtable, SCM_BOOL_F); - - if (scm_is_false (class)) - { - if (SCM_UNPACK (scm_class_class)) - { - SCM name = SCM_VTABLE_NAME (vtable); - if (!scm_is_symbol (name)) - name = scm_string_to_symbol (scm_nullstr); - - class = scm_make_extended_class_from_symbol - (name, SCM_VTABLE_FLAG_IS_SET (vtable, SCM_VTABLE_FLAG_APPLICABLE)); - } - else - /* `create_struct_classes' will fill this in later. */ - class = SCM_BOOL_F; - - /* Don't worry about races. This only happens when creating a - vtable, which happens by definition in one thread. */ - scm_weak_table_putq_x (vtable_class_map, vtable, class); - } - - return class; -} - -/* This function is used for efficient type dispatch. */ -SCM_DEFINE (scm_class_of, "class-of", 1, 0, 0, - (SCM x), - "Return the class of @var{x}.") -#define FUNC_NAME s_scm_class_of -{ - switch (SCM_ITAG3 (x)) - { - case scm_tc3_int_1: - case scm_tc3_int_2: - return scm_class_integer; - - case scm_tc3_imm24: - if (SCM_CHARP (x)) - return scm_class_char; - else if (scm_is_bool (x)) - return scm_class_boolean; - else if (scm_is_null (x)) - return scm_class_null; - else - return scm_class_unknown; - - case scm_tc3_cons: - switch (SCM_TYP7 (x)) - { - case scm_tcs_cons_nimcar: - return scm_class_pair; - case scm_tc7_symbol: - return scm_class_symbol; - case scm_tc7_vector: - case scm_tc7_wvect: - return scm_class_vector; - case scm_tc7_pointer: - return class_foreign; - case scm_tc7_hashtable: - return class_hashtable; - case scm_tc7_fluid: - return class_fluid; - case scm_tc7_dynamic_state: - return class_dynamic_state; - case scm_tc7_frame: - return class_frame; - case scm_tc7_objcode: - return class_objcode; - case scm_tc7_vm: - return class_vm; - case scm_tc7_vm_cont: - return class_vm_cont; - case scm_tc7_bytevector: - if (SCM_BYTEVECTOR_ELEMENT_TYPE (x) == SCM_ARRAY_ELEMENT_TYPE_VU8) - return class_bytevector; - else - return class_uvec; - case scm_tc7_array: - return class_array; - case scm_tc7_bitvector: - return class_bitvector; - case scm_tc7_string: - return scm_class_string; - case scm_tc7_number: - switch SCM_TYP16 (x) { - case scm_tc16_big: - return scm_class_integer; - case scm_tc16_real: - return scm_class_real; - case scm_tc16_complex: - return scm_class_complex; - case scm_tc16_fraction: - return scm_class_fraction; - } - case scm_tc7_program: - if (SCM_PROGRAM_IS_PRIMITIVE_GENERIC (x) - && SCM_UNPACK (*SCM_SUBR_GENERIC (x))) - return scm_class_primitive_generic; - else - return scm_class_procedure; - - case scm_tc7_smob: - { - scm_t_bits type = SCM_TYP16 (x); - if (type != scm_tc16_port_with_ps) - return scm_smob_class[SCM_TC2SMOBNUM (type)]; - x = SCM_PORT_WITH_PS_PORT (x); - /* fall through to ports */ - } - case scm_tc7_port: - return scm_port_class[(SCM_WRTNG & SCM_CELL_WORD_0 (x) - ? (SCM_RDNG & SCM_CELL_WORD_0 (x) - ? SCM_INOUT_PCLASS_INDEX | SCM_PTOBNUM (x) - : SCM_OUT_PCLASS_INDEX | SCM_PTOBNUM (x)) - : SCM_IN_PCLASS_INDEX | SCM_PTOBNUM (x))]; - case scm_tcs_struct: - if (SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_GOOPS_VALID) - return SCM_CLASS_OF (x); - else if (SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_GOOPS) - { - /* Goops object */ - if (! scm_is_false (SCM_OBJ_CLASS_REDEF (x))) - scm_change_object_class (x, - SCM_CLASS_OF (x), /* old */ - SCM_OBJ_CLASS_REDEF (x)); /* new */ - return SCM_CLASS_OF (x); - } - else - return scm_i_define_class_for_vtable (SCM_CLASS_OF (x)); - default: - if (scm_is_pair (x)) - return scm_class_pair; - else - return scm_class_unknown; - } - - case scm_tc3_struct: - case scm_tc3_tc7_1: - case scm_tc3_tc7_2: - /* case scm_tc3_unused: */ - /* Never reached */ - break; - } - return scm_class_unknown; -} -#undef FUNC_NAME - -/****************************************************************************** - * - * Compute-cpl - * - * This version doesn't fully handle multiple-inheritance. It serves - * only for booting classes and will be overloaded in Scheme - * - ******************************************************************************/ - -static SCM -map (SCM (*proc) (SCM), SCM ls) -{ - if (scm_is_null (ls)) - return ls; - else - { - SCM res = scm_cons (proc (SCM_CAR (ls)), SCM_EOL); - SCM h = res; - ls = SCM_CDR (ls); - while (scm_is_pair (ls)) - { - SCM_SETCDR (h, scm_cons (proc (SCM_CAR (ls)), SCM_EOL)); - h = SCM_CDR (h); - ls = SCM_CDR (ls); - } - return res; - } -} - -static SCM -filter_cpl (SCM ls) -{ - SCM res = SCM_EOL; - while (scm_is_pair (ls)) - { - SCM el = SCM_CAR (ls); - if (scm_is_false (scm_c_memq (el, res))) - res = scm_cons (el, res); - ls = SCM_CDR (ls); - } - return res; -} - -static SCM -compute_cpl (SCM class) -{ - if (goops_loaded_p) - return scm_call_1 (SCM_VARIABLE_REF (var_compute_cpl), class); - else - { - SCM supers = SCM_SLOT (class, scm_si_direct_supers); - SCM ls = scm_append (scm_acons (class, supers, - map (compute_cpl, supers))); - return scm_reverse_x (filter_cpl (ls), SCM_EOL); - } -} - -/****************************************************************************** - * - * compute-slots - * - ******************************************************************************/ - -static SCM -remove_duplicate_slots (SCM l, SCM res, SCM slots_already_seen) -{ - SCM tmp; - - if (!scm_is_pair (l)) - return res; - - tmp = SCM_CAAR (l); - if (!scm_is_symbol (tmp)) - scm_misc_error ("%compute-slots", "bad slot name ~S", scm_list_1 (tmp)); - - if (scm_is_false (scm_c_memq (tmp, slots_already_seen))) { - res = scm_cons (SCM_CAR (l), res); - slots_already_seen = scm_cons (tmp, slots_already_seen); - } - - return remove_duplicate_slots (SCM_CDR (l), res, slots_already_seen); -} - -static void -check_cpl (SCM slots, SCM bslots) -{ - for (; scm_is_pair (bslots); bslots = SCM_CDR (bslots)) - if (scm_is_true (scm_assq (SCM_CAAR (bslots), slots))) - scm_misc_error ("init-object", "a predefined inherited " - "field cannot be redefined", SCM_EOL); -} - -static SCM -build_class_class_slots (void); - -static SCM -build_slots_list (SCM dslots, SCM cpl) -{ - SCM bslots, class_slots; - int classp; - SCM res = dslots; - - class_slots = SCM_EOL; - classp = scm_is_true (scm_memq (scm_class_class, cpl)); - - if (classp) - { - bslots = build_class_class_slots (); - check_cpl (res, bslots); - } - else - bslots = SCM_EOL; - - if (scm_is_pair (cpl)) - { - for (cpl = SCM_CDR (cpl); scm_is_pair (cpl); cpl = SCM_CDR (cpl)) - { - SCM new_slots = SCM_SLOT (SCM_CAR (cpl), - scm_si_direct_slots); - if (classp) - { - if (!scm_is_eq (SCM_CAR (cpl), scm_class_class)) - check_cpl (new_slots, bslots); - else - { - /* Move class slots to the head of the list. */ - class_slots = new_slots; - continue; - } - } - res = scm_append (scm_list_2 (new_slots, res)); - } - } - else - scm_misc_error ("%compute-slots", "malformed cpl argument in " - "build_slots_list", SCM_EOL); - - /* make sure to add the slots to the head of the list */ - if (classp) - res = scm_append (scm_list_2 (class_slots, res)); - - /* res contains a list of slots. Remove slots which appears more than once */ - return remove_duplicate_slots (scm_reverse (res), SCM_EOL, SCM_EOL); -} - -static SCM -maplist (SCM ls) -{ - SCM orig = ls; - while (!scm_is_null (ls)) - { - if (!scm_is_pair (ls)) - scm_misc_error ("%compute-slots", "malformed ls argument in " - "maplist", SCM_EOL); - if (!scm_is_pair (SCM_CAR (ls))) - SCM_SETCAR (ls, scm_cons (SCM_CAR (ls), SCM_EOL)); - ls = SCM_CDR (ls); - } - return orig; -} - - -SCM_DEFINE (scm_sys_compute_slots, "%compute-slots", 1, 0, 0, - (SCM class), - "Return a list consisting of the names of all slots belonging to\n" - "class @var{class}, i. e. the slots of @var{class} and of all of\n" - "its superclasses.") -#define FUNC_NAME s_scm_sys_compute_slots -{ - SCM_VALIDATE_CLASS (1, class); - return build_slots_list (SCM_SLOT (class, scm_si_direct_slots), - SCM_SLOT (class, scm_si_cpl)); -} -#undef FUNC_NAME - - -/****************************************************************************** - * - * compute-getters-n-setters - * - * This version doesn't handle slot options. It serves only for booting - * classes and will be overloaded in Scheme. - * - ******************************************************************************/ - -SCM_KEYWORD (k_init_value, "init-value"); -SCM_KEYWORD (k_init_thunk, "init-thunk"); - -static SCM -compute_getters_n_setters (SCM slots) -{ - SCM res = SCM_EOL; - SCM *cdrloc = &res; - long i = 0; - - for ( ; !scm_is_null (slots); slots = SCM_CDR (slots)) - { - SCM init = SCM_BOOL_F; - SCM options = SCM_CDAR (slots); - if (!scm_is_null (options)) - { - init = scm_get_keyword (k_init_value, options, SCM_PACK (0)); - if (SCM_UNPACK (init)) - { - init = scm_primitive_eval (scm_list_3 (scm_sym_lambda, - SCM_EOL, - scm_list_2 (scm_sym_quote, - init))); - } - else - init = scm_get_keyword (k_init_thunk, options, SCM_BOOL_F); - } - *cdrloc = scm_cons (scm_cons (SCM_CAAR (slots), - scm_cons (init, - scm_from_int (i++))), - SCM_EOL); - cdrloc = SCM_CDRLOC (*cdrloc); - } - return res; -} - -/****************************************************************************** - * - * initialize-object - * - ******************************************************************************/ - -/*fixme* Manufacture keywords in advance */ -SCM -scm_i_get_keyword (SCM key, SCM l, long len, SCM default_value, const char *subr) -{ - long i; - - for (i = 0; i != len; i += 2) - { - SCM obj = SCM_CAR (l); - - if (!scm_is_keyword (obj)) - scm_misc_error (subr, "bad keyword: ~S", scm_list_1 (obj)); - else if (scm_is_eq (obj, key)) - return SCM_CADR (l); - else - l = SCM_CDDR (l); - } - - return default_value; -} - - -SCM_DEFINE (scm_get_keyword, "get-keyword", 3, 0, 0, - (SCM key, SCM l, SCM default_value), - "Determine an associated value for the keyword @var{key} from\n" - "the list @var{l}. The list @var{l} has to consist of an even\n" - "number of elements, where, starting with the first, every\n" - "second element is a keyword, followed by its associated value.\n" - "If @var{l} does not hold a value for @var{key}, the value\n" - "@var{default_value} is returned.") -#define FUNC_NAME s_scm_get_keyword -{ - long len; - - SCM_ASSERT (scm_is_keyword (key), key, SCM_ARG1, FUNC_NAME); - len = scm_ilength (l); - if (len < 0 || len % 2 == 1) - scm_misc_error (FUNC_NAME, "Bad keyword-value list: ~S", scm_list_1 (l)); - - return scm_i_get_keyword (key, l, len, default_value, FUNC_NAME); -} -#undef FUNC_NAME - - -SCM_KEYWORD (k_init_keyword, "init-keyword"); - -static SCM get_slot_value (SCM class, SCM obj, SCM slotdef); -static SCM set_slot_value (SCM class, SCM obj, SCM slotdef, SCM value); - -SCM_DEFINE (scm_sys_initialize_object, "%initialize-object", 2, 0, 0, - (SCM obj, SCM initargs), - "Initialize the object @var{obj} with the given arguments\n" - "@var{initargs}.") -#define FUNC_NAME s_scm_sys_initialize_object -{ - SCM tmp, get_n_set, slots; - SCM class = SCM_CLASS_OF (obj); - long n_initargs; - - SCM_VALIDATE_INSTANCE (1, obj); - n_initargs = scm_ilength (initargs); - SCM_ASSERT ((n_initargs & 1) == 0, initargs, SCM_ARG2, FUNC_NAME); - - get_n_set = SCM_SLOT (class, scm_si_getters_n_setters); - slots = SCM_SLOT (class, scm_si_slots); - - /* See for each slot how it must be initialized */ - for (; - !scm_is_null (slots); - get_n_set = SCM_CDR (get_n_set), slots = SCM_CDR (slots)) - { - SCM slot_name = SCM_CAR (slots); - SCM slot_value = SCM_PACK (0); - - if (!scm_is_null (SCM_CDR (slot_name))) - { - /* This slot admits (perhaps) to be initialized at creation time */ - long n = scm_ilength (SCM_CDR (slot_name)); - if (n & 1) /* odd or -1 */ - SCM_MISC_ERROR ("class contains bogus slot definition: ~S", - scm_list_1 (slot_name)); - tmp = scm_i_get_keyword (k_init_keyword, - SCM_CDR (slot_name), - n, - SCM_PACK (0), - FUNC_NAME); - slot_name = SCM_CAR (slot_name); - if (SCM_UNPACK (tmp)) - { - /* an initarg was provided for this slot */ - if (!scm_is_keyword (tmp)) - SCM_MISC_ERROR ("initarg must be a keyword. It was ~S", - scm_list_1 (tmp)); - slot_value = scm_i_get_keyword (tmp, - initargs, - n_initargs, - SCM_PACK (0), - FUNC_NAME); - } - } - - if (SCM_UNPACK (slot_value)) - /* set slot to provided value */ - set_slot_value (class, obj, SCM_CAR (get_n_set), slot_value); - else - { - /* set slot to its :init-form if it exists */ - tmp = SCM_CADAR (get_n_set); - if (scm_is_true (tmp)) - { - slot_value = get_slot_value (class, obj, SCM_CAR (get_n_set)); - if (SCM_GOOPS_UNBOUNDP (slot_value)) - set_slot_value (class, - obj, - SCM_CAR (get_n_set), - scm_call_0 (tmp)); - } - } - } - - return obj; -} -#undef FUNC_NAME - -/* NOTE: The following macros are interdependent with code - * in goops.scm:compute-getters-n-setters - */ -#define SCM_GNS_INSTANCE_ALLOCATED_P(gns) \ - (SCM_I_INUMP (SCM_CDDR (gns)) \ - || (scm_is_pair (SCM_CDDR (gns)) \ - && scm_is_pair (SCM_CDDDR (gns)) \ - && scm_is_pair (SCM_CDDDDR (gns)))) -#define SCM_GNS_INDEX(gns) \ - (SCM_I_INUMP (SCM_CDDR (gns)) \ - ? SCM_I_INUM (SCM_CDDR (gns)) \ - : scm_to_long (SCM_CAR (SCM_CDDDDR (gns)))) -#define SCM_GNS_SIZE(gns) \ - (SCM_I_INUMP (SCM_CDDR (gns)) \ - ? 1 \ - : scm_to_long (SCM_CADR (SCM_CDDDDR (gns)))) - -SCM_KEYWORD (k_class, "class"); -SCM_KEYWORD (k_allocation, "allocation"); -SCM_KEYWORD (k_instance, "instance"); - -SCM_DEFINE (scm_sys_prep_layout_x, "%prep-layout!", 1, 0, 0, - (SCM class), - "") -#define FUNC_NAME s_scm_sys_prep_layout_x -{ - SCM slots, getters_n_setters, nfields; - unsigned long int n, i; - char *s; - SCM layout; - - SCM_VALIDATE_INSTANCE (1, class); - slots = SCM_SLOT (class, scm_si_slots); - getters_n_setters = SCM_SLOT (class, scm_si_getters_n_setters); - nfields = SCM_SLOT (class, scm_si_nfields); - if (!SCM_I_INUMP (nfields) || SCM_I_INUM (nfields) < 0) - SCM_MISC_ERROR ("bad value in nfields slot: ~S", - scm_list_1 (nfields)); - n = 2 * SCM_I_INUM (nfields); - if (n < sizeof (SCM_CLASS_CLASS_LAYOUT) - 1 - && SCM_SUBCLASSP (class, scm_class_class)) - SCM_MISC_ERROR ("class object doesn't have enough fields: ~S", - scm_list_1 (nfields)); - - layout = scm_i_make_string (n, &s, 0); - i = 0; - while (scm_is_pair (getters_n_setters)) - { - if (SCM_GNS_INSTANCE_ALLOCATED_P (SCM_CAR (getters_n_setters))) - { - SCM type; - int len, index, size; - char p, a; - - if (i >= n || !scm_is_pair (slots)) - goto inconsistent; - - /* extract slot type */ - len = scm_ilength (SCM_CDAR (slots)); - type = scm_i_get_keyword (k_class, SCM_CDAR (slots), - len, SCM_BOOL_F, FUNC_NAME); - /* determine slot GC protection and access mode */ - if (scm_is_false (type)) - { - p = 'p'; - a = 'w'; - } - else - { - if (!SCM_CLASSP (type)) - SCM_MISC_ERROR ("bad slot class", SCM_EOL); - else if (SCM_SUBCLASSP (type, scm_class_foreign_slot)) - { - if (SCM_SUBCLASSP (type, scm_class_self)) - p = 's'; - else if (SCM_SUBCLASSP (type, scm_class_protected)) - p = 'p'; - else - p = 'u'; - - if (SCM_SUBCLASSP (type, scm_class_opaque)) - a = 'o'; - else if (SCM_SUBCLASSP (type, scm_class_read_only)) - a = 'r'; - else if (SCM_SUBCLASSP (type, scm_class_hidden)) - a = 'h'; - else - a = 'w'; - } - else - { - p = 'p'; - a = 'w'; - } - } - - index = SCM_GNS_INDEX (SCM_CAR (getters_n_setters)); - if (index != (i >> 1)) - goto inconsistent; - size = SCM_GNS_SIZE (SCM_CAR (getters_n_setters)); - while (size) - { - s[i++] = p; - s[i++] = a; - --size; - } - } - slots = SCM_CDR (slots); - getters_n_setters = SCM_CDR (getters_n_setters); - } - if (!scm_is_null (slots)) - { - inconsistent: - SCM_MISC_ERROR ("inconsistent getters-n-setters", SCM_EOL); - } - SCM_SET_VTABLE_LAYOUT (class, scm_string_to_symbol (layout)); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -static void prep_hashsets (SCM); - -SCM_DEFINE (scm_sys_inherit_magic_x, "%inherit-magic!", 2, 0, 0, - (SCM class, SCM dsupers), - "") -#define FUNC_NAME s_scm_sys_inherit_magic_x -{ - SCM_VALIDATE_INSTANCE (1, class); - scm_i_struct_inherit_vtable_magic (SCM_CLASS_OF (class), class); - SCM_SET_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_OR_VALID); - - prep_hashsets (class); - - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -static void -prep_hashsets (SCM class) -{ - unsigned int i; - - for (i = 0; i < 8; ++i) - SCM_SET_HASHSET (class, i, scm_c_uniform32 (goops_rstate)); -} - -/******************************************************************************/ - -SCM -scm_basic_basic_make_class (SCM class, SCM name, SCM dsupers, SCM dslots) -{ - SCM z, cpl, slots, nfields, g_n_s; - - /* Allocate one instance */ - z = scm_make_struct (class, SCM_INUM0, SCM_EOL); - - /* Initialize its slots */ - SCM_SET_SLOT (z, scm_si_direct_supers, dsupers); - cpl = compute_cpl (z); - slots = build_slots_list (maplist (dslots), cpl); - nfields = scm_from_int (scm_ilength (slots)); - g_n_s = compute_getters_n_setters (slots); - - SCM_SET_SLOT (z, scm_vtable_index_name, name); - SCM_SET_SLOT (z, scm_si_direct_slots, dslots); - SCM_SET_SLOT (z, scm_si_direct_subclasses, SCM_EOL); - SCM_SET_SLOT (z, scm_si_direct_methods, SCM_EOL); - SCM_SET_SLOT (z, scm_si_cpl, cpl); - SCM_SET_SLOT (z, scm_si_slots, slots); - SCM_SET_SLOT (z, scm_si_nfields, nfields); - SCM_SET_SLOT (z, scm_si_getters_n_setters, g_n_s); - SCM_SET_SLOT (z, scm_si_redefined, SCM_BOOL_F); - - /* Add this class in the direct-subclasses slot of dsupers */ - { - SCM tmp; - for (tmp = dsupers; !scm_is_null (tmp); tmp = SCM_CDR (tmp)) - SCM_SET_SLOT (SCM_CAR (tmp), scm_si_direct_subclasses, - scm_cons (z, SCM_SLOT (SCM_CAR (tmp), - scm_si_direct_subclasses))); - } - - return z; -} - -SCM -scm_basic_make_class (SCM class, SCM name, SCM dsupers, SCM dslots) -{ - SCM z = scm_basic_basic_make_class (class, name, dsupers, dslots); - scm_sys_prep_layout_x (z); - scm_sys_inherit_magic_x (z, dsupers); - return z; -} - -/******************************************************************************/ - -SCM_SYMBOL (sym_layout, "layout"); -SCM_SYMBOL (sym_flags, "flags"); -SCM_SYMBOL (sym_self, "%self"); -SCM_SYMBOL (sym_instance_finalizer, "instance-finalizer"); -SCM_SYMBOL (sym_reserved_0, "%reserved-0"); -SCM_SYMBOL (sym_reserved_1, "%reserved-1"); -SCM_SYMBOL (sym_print, "print"); -SCM_SYMBOL (sym_procedure, "procedure"); -SCM_SYMBOL (sym_setter, "setter"); -SCM_SYMBOL (sym_redefined, "redefined"); -SCM_SYMBOL (sym_h0, "h0"); -SCM_SYMBOL (sym_h1, "h1"); -SCM_SYMBOL (sym_h2, "h2"); -SCM_SYMBOL (sym_h3, "h3"); -SCM_SYMBOL (sym_h4, "h4"); -SCM_SYMBOL (sym_h5, "h5"); -SCM_SYMBOL (sym_h6, "h6"); -SCM_SYMBOL (sym_h7, "h7"); -SCM_SYMBOL (sym_name, "name"); -SCM_SYMBOL (sym_direct_supers, "direct-supers"); -SCM_SYMBOL (sym_direct_slots, "direct-slots"); -SCM_SYMBOL (sym_direct_subclasses, "direct-subclasses"); -SCM_SYMBOL (sym_direct_methods, "direct-methods"); -SCM_SYMBOL (sym_cpl, "cpl"); -SCM_SYMBOL (sym_default_slot_definition_class, "default-slot-definition-class"); -SCM_SYMBOL (sym_slots, "slots"); -SCM_SYMBOL (sym_getters_n_setters, "getters-n-setters"); -SCM_SYMBOL (sym_nfields, "nfields"); - - -static SCM -build_class_class_slots (void) -{ - /* has to be kept in sync with SCM_VTABLE_BASE_LAYOUT and - SCM_CLASS_CLASS_LAYOUT */ - return scm_list_n ( - scm_list_3 (sym_layout, k_class, scm_class_protected_read_only), - scm_list_3 (sym_flags, k_class, scm_class_hidden), - scm_list_3 (sym_self, k_class, scm_class_self), - scm_list_3 (sym_instance_finalizer, k_class, scm_class_hidden), - scm_list_1 (sym_print), - scm_list_3 (sym_name, k_class, scm_class_protected_hidden), - scm_list_3 (sym_reserved_0, k_class, scm_class_hidden), - scm_list_3 (sym_reserved_1, k_class, scm_class_hidden), - scm_list_1 (sym_redefined), - scm_list_3 (sym_h0, k_class, scm_class_int), - scm_list_3 (sym_h1, k_class, scm_class_int), - scm_list_3 (sym_h2, k_class, scm_class_int), - scm_list_3 (sym_h3, k_class, scm_class_int), - scm_list_3 (sym_h4, k_class, scm_class_int), - scm_list_3 (sym_h5, k_class, scm_class_int), - scm_list_3 (sym_h6, k_class, scm_class_int), - scm_list_3 (sym_h7, k_class, scm_class_int), - scm_list_1 (sym_direct_supers), - scm_list_1 (sym_direct_slots), - scm_list_1 (sym_direct_subclasses), - scm_list_1 (sym_direct_methods), - scm_list_1 (sym_cpl), - scm_list_1 (sym_default_slot_definition_class), - scm_list_1 (sym_slots), - scm_list_1 (sym_getters_n_setters), - scm_list_1 (sym_nfields), - SCM_UNDEFINED); -} - -static void -create_basic_classes (void) -{ - /* SCM slots_of_class = build_class_class_slots (); */ - - /**** ****/ - SCM cs = scm_from_locale_string (SCM_CLASS_CLASS_LAYOUT); - SCM name = scm_from_latin1_symbol (""); - scm_class_class = scm_i_make_vtable_vtable (cs); - SCM_SET_CLASS_FLAGS (scm_class_class, (SCM_CLASSF_GOOPS_OR_VALID - | SCM_CLASSF_METACLASS)); - - SCM_SET_SLOT (scm_class_class, scm_vtable_index_name, name); - SCM_SET_SLOT (scm_class_class, scm_si_direct_supers, SCM_EOL); /* will be changed */ - /* SCM_SET_SLOT (scm_class_class, scm_si_direct_slots, slots_of_class); */ - SCM_SET_SLOT (scm_class_class, scm_si_direct_subclasses, SCM_EOL); - SCM_SET_SLOT (scm_class_class, scm_si_direct_methods, SCM_EOL); - SCM_SET_SLOT (scm_class_class, scm_si_cpl, SCM_EOL); /* will be changed */ - /* SCM_SET_SLOT (scm_class_class, scm_si_slots, slots_of_class); */ - SCM_SET_SLOT (scm_class_class, scm_si_nfields, scm_from_int (SCM_N_CLASS_SLOTS)); - /* SCM_SET_SLOT (scm_class_class, scm_si_getters_n_setters, - compute_getters_n_setters (slots_of_class)); */ - SCM_SET_SLOT (scm_class_class, scm_si_redefined, SCM_BOOL_F); - - prep_hashsets (scm_class_class); - - scm_module_define (scm_module_goops, name, scm_class_class); - - /**** ****/ - name = scm_from_latin1_symbol (""); - scm_class_top = scm_basic_make_class (scm_class_class, name, - SCM_EOL, SCM_EOL); - - scm_module_define (scm_module_goops, name, scm_class_top); - - /**** ****/ - name = scm_from_latin1_symbol (""); - scm_class_object = scm_basic_make_class (scm_class_class, name, - scm_list_1 (scm_class_top), SCM_EOL); - - scm_module_define (scm_module_goops, name, scm_class_object); - - /* and were partially initialized. Correct them here */ - SCM_SET_SLOT (scm_class_object, scm_si_direct_subclasses, scm_list_1 (scm_class_class)); - - SCM_SET_SLOT (scm_class_class, scm_si_direct_supers, scm_list_1 (scm_class_object)); - SCM_SET_SLOT (scm_class_class, scm_si_cpl, scm_list_3 (scm_class_class, scm_class_object, scm_class_top)); -} - -/******************************************************************************/ - -SCM_DEFINE (scm_instance_p, "instance?", 1, 0, 0, - (SCM obj), - "Return @code{#t} if @var{obj} is an instance.") -#define FUNC_NAME s_scm_instance_p -{ - return scm_from_bool (SCM_INSTANCEP (obj)); -} -#undef FUNC_NAME - - -/****************************************************************************** - * - * Meta object accessors - * - ******************************************************************************/ -SCM_DEFINE (scm_class_name, "class-name", 1, 0, 0, - (SCM obj), - "Return the class name of @var{obj}.") -#define FUNC_NAME s_scm_class_name -{ - SCM_VALIDATE_CLASS (1, obj); - return scm_slot_ref (obj, sym_name); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_class_direct_supers, "class-direct-supers", 1, 0, 0, - (SCM obj), - "Return the direct superclasses of the class @var{obj}.") -#define FUNC_NAME s_scm_class_direct_supers -{ - SCM_VALIDATE_CLASS (1, obj); - return scm_slot_ref (obj, sym_direct_supers); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_class_direct_slots, "class-direct-slots", 1, 0, 0, - (SCM obj), - "Return the direct slots of the class @var{obj}.") -#define FUNC_NAME s_scm_class_direct_slots -{ - SCM_VALIDATE_CLASS (1, obj); - return scm_slot_ref (obj, sym_direct_slots); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_class_direct_subclasses, "class-direct-subclasses", 1, 0, 0, - (SCM obj), - "Return the direct subclasses of the class @var{obj}.") -#define FUNC_NAME s_scm_class_direct_subclasses -{ - SCM_VALIDATE_CLASS (1, obj); - return scm_slot_ref(obj, sym_direct_subclasses); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_class_direct_methods, "class-direct-methods", 1, 0, 0, - (SCM obj), - "Return the direct methods of the class @var{obj}") -#define FUNC_NAME s_scm_class_direct_methods -{ - SCM_VALIDATE_CLASS (1, obj); - return scm_slot_ref (obj, sym_direct_methods); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_class_precedence_list, "class-precedence-list", 1, 0, 0, - (SCM obj), - "Return the class precedence list of the class @var{obj}.") -#define FUNC_NAME s_scm_class_precedence_list -{ - SCM_VALIDATE_CLASS (1, obj); - return scm_slot_ref (obj, sym_cpl); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_class_slots, "class-slots", 1, 0, 0, - (SCM obj), - "Return the slot list of the class @var{obj}.") -#define FUNC_NAME s_scm_class_slots -{ - SCM_VALIDATE_CLASS (1, obj); - return scm_slot_ref (obj, sym_slots); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_generic_function_name, "generic-function-name", 1, 0, 0, - (SCM obj), - "Return the name of the generic function @var{obj}.") -#define FUNC_NAME s_scm_generic_function_name -{ - SCM_VALIDATE_GENERIC (1, obj); - return scm_procedure_property (obj, scm_sym_name); -} -#undef FUNC_NAME - -SCM_SYMBOL (sym_methods, "methods"); -SCM_SYMBOL (sym_extended_by, "extended-by"); -SCM_SYMBOL (sym_extends, "extends"); - -static -SCM fold_downward_gf_methods (SCM method_lists, SCM gf) -{ - SCM gfs = scm_slot_ref (gf, sym_extended_by); - method_lists = scm_cons (scm_slot_ref (gf, sym_methods), method_lists); - while (!scm_is_null (gfs)) - { - method_lists = fold_downward_gf_methods (method_lists, SCM_CAR (gfs)); - gfs = SCM_CDR (gfs); - } - return method_lists; -} - -static -SCM fold_upward_gf_methods (SCM method_lists, SCM gf) -{ - if (SCM_IS_A_P (gf, scm_class_extended_generic)) - { - SCM gfs = scm_slot_ref (gf, sym_extends); - while (!scm_is_null (gfs)) - { - SCM methods = scm_slot_ref (SCM_CAR (gfs), sym_methods); - method_lists = fold_upward_gf_methods (scm_cons (methods, - method_lists), - SCM_CAR (gfs)); - gfs = SCM_CDR (gfs); - } - } - return method_lists; -} - -SCM_DEFINE (scm_generic_function_methods, "generic-function-methods", 1, 0, 0, - (SCM obj), - "Return the methods of the generic function @var{obj}.") -#define FUNC_NAME s_scm_generic_function_methods -{ - SCM methods; - SCM_VALIDATE_GENERIC (1, obj); - methods = fold_upward_gf_methods (SCM_EOL, obj); - methods = fold_downward_gf_methods (methods, obj); - return scm_append (methods); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_method_generic_function, "method-generic-function", 1, 0, 0, - (SCM obj), - "Return the generic function for the method @var{obj}.") -#define FUNC_NAME s_scm_method_generic_function -{ - SCM_VALIDATE_METHOD (1, obj); - return scm_slot_ref (obj, scm_from_latin1_symbol ("generic-function")); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_method_specializers, "method-specializers", 1, 0, 0, - (SCM obj), - "Return specializers of the method @var{obj}.") -#define FUNC_NAME s_scm_method_specializers -{ - SCM_VALIDATE_METHOD (1, obj); - return scm_slot_ref (obj, scm_from_latin1_symbol ("specializers")); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_method_procedure, "method-procedure", 1, 0, 0, - (SCM obj), - "Return the procedure of the method @var{obj}.") -#define FUNC_NAME s_scm_method_procedure -{ - SCM_VALIDATE_METHOD (1, obj); - return scm_slot_ref (obj, sym_procedure); -} -#undef FUNC_NAME - -/****************************************************************************** - * - * S l o t a c c e s s - * - ******************************************************************************/ - -SCM_DEFINE (scm_make_unbound, "make-unbound", 0, 0, 0, - (), - "Return the unbound value.") -#define FUNC_NAME s_scm_make_unbound -{ - return SCM_GOOPS_UNBOUND; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_unbound_p, "unbound?", 1, 0, 0, - (SCM obj), - "Return @code{#t} if @var{obj} is unbound.") -#define FUNC_NAME s_scm_unbound_p -{ - return SCM_GOOPS_UNBOUNDP (obj) ? SCM_BOOL_T : SCM_BOOL_F; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_assert_bound, "assert-bound", 2, 0, 0, - (SCM value, SCM obj), - "Return @var{value} if it is bound, and invoke the\n" - "@var{slot-unbound} method of @var{obj} if it is not.") -#define FUNC_NAME s_scm_assert_bound -{ - if (SCM_GOOPS_UNBOUNDP (value)) - return scm_call_1 (SCM_VARIABLE_REF (var_slot_unbound), obj); - return value; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_at_assert_bound_ref, "@assert-bound-ref", 2, 0, 0, - (SCM obj, SCM index), - "Like @code{assert-bound}, but use @var{index} for accessing\n" - "the value from @var{obj}.") -#define FUNC_NAME s_scm_at_assert_bound_ref -{ - SCM value = SCM_SLOT (obj, scm_to_int (index)); - if (SCM_GOOPS_UNBOUNDP (value)) - return scm_call_1 (SCM_VARIABLE_REF (var_slot_unbound), obj); - return value; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_sys_fast_slot_ref, "%fast-slot-ref", 2, 0, 0, - (SCM obj, SCM index), - "Return the slot value with index @var{index} from @var{obj}.") -#define FUNC_NAME s_scm_sys_fast_slot_ref -{ - scm_t_bits i; - - SCM_VALIDATE_INSTANCE (1, obj); - i = scm_to_unsigned_integer (index, 0, - SCM_I_INUM (SCM_SLOT (SCM_CLASS_OF (obj), - scm_si_nfields)) - - 1); - return SCM_SLOT (obj, i); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_sys_fast_slot_set_x, "%fast-slot-set!", 3, 0, 0, - (SCM obj, SCM index, SCM value), - "Set the slot with index @var{index} in @var{obj} to\n" - "@var{value}.") -#define FUNC_NAME s_scm_sys_fast_slot_set_x -{ - scm_t_bits i; - - SCM_VALIDATE_INSTANCE (1, obj); - i = scm_to_unsigned_integer (index, 0, - SCM_I_INUM (SCM_SLOT (SCM_CLASS_OF (obj), - scm_si_nfields)) - - 1); - - SCM_SET_SLOT (obj, i, value); - - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - - - -/** Utilities **/ - -/* In the future, this function will return the effective slot - * definition associated with SLOT_NAME. Now it just returns some of - * the information which will be stored in the effective slot - * definition. - */ - -static SCM -slot_definition_using_name (SCM class, SCM slot_name) -{ - register SCM slots = SCM_SLOT (class, scm_si_getters_n_setters); - for (; !scm_is_null (slots); slots = SCM_CDR (slots)) - if (scm_is_eq (SCM_CAAR (slots), slot_name)) - return SCM_CAR (slots); - return SCM_BOOL_F; -} - -static SCM -get_slot_value (SCM class SCM_UNUSED, SCM obj, SCM slotdef) -#define FUNC_NAME "%get-slot-value" -{ - SCM access = SCM_CDDR (slotdef); - /* Two cases here: - * - access is an integer (the offset of this slot in the slots vector) - * - otherwise (car access) is the getter function to apply - * - * Instances have never more than SCM_MOST_POSITIVE_FIXNUM slots, so - * we can just assume fixnums here. - */ - if (SCM_I_INUMP (access)) - /* Don't poke at the slots directly, because scm_struct_ref handles the - access bits for us. */ - return scm_struct_ref (obj, access); - else - return scm_call_1 (SCM_CAR (access), obj); -} -#undef FUNC_NAME - -static SCM -get_slot_value_using_name (SCM class, SCM obj, SCM slot_name) -{ - SCM slotdef = slot_definition_using_name (class, slot_name); - if (scm_is_true (slotdef)) - return get_slot_value (class, obj, slotdef); - else - return scm_call_3 (SCM_VARIABLE_REF (var_slot_missing), class, obj, slot_name); -} - -static SCM -set_slot_value (SCM class SCM_UNUSED, SCM obj, SCM slotdef, SCM value) -#define FUNC_NAME "%set-slot-value" -{ - SCM access = SCM_CDDR (slotdef); - /* Two cases here: - * - access is an integer (the offset of this slot in the slots vector) - * - otherwise (cadr access) is the setter function to apply - * - * Instances have never more than SCM_MOST_POSITIVE_FIXNUM slots, so - * we can just assume fixnums here. - */ - if (SCM_I_INUMP (access)) - /* obey permissions bits via going through struct-set! */ - scm_struct_set_x (obj, access, value); - else - /* ((cadr l) obj value) */ - scm_call_2 (SCM_CADR (access), obj, value); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -static SCM -set_slot_value_using_name (SCM class, SCM obj, SCM slot_name, SCM value) -{ - SCM slotdef = slot_definition_using_name (class, slot_name); - if (scm_is_true (slotdef)) - return set_slot_value (class, obj, slotdef, value); - else - return scm_call_4 (SCM_VARIABLE_REF (var_slot_missing), class, obj, slot_name, value); -} - -static SCM -test_slot_existence (SCM class SCM_UNUSED, SCM obj, SCM slot_name) -{ - register SCM l; - - for (l = SCM_ACCESSORS_OF (obj); !scm_is_null (l); l = SCM_CDR (l)) - if (scm_is_eq (SCM_CAAR (l), slot_name)) - return SCM_BOOL_T; - - return SCM_BOOL_F; -} - - /* ======================================== */ - -SCM_DEFINE (scm_slot_ref_using_class, "slot-ref-using-class", 3, 0, 0, - (SCM class, SCM obj, SCM slot_name), - "") -#define FUNC_NAME s_scm_slot_ref_using_class -{ - SCM res; - - SCM_VALIDATE_CLASS (1, class); - SCM_VALIDATE_INSTANCE (2, obj); - SCM_VALIDATE_SYMBOL (3, slot_name); - - res = get_slot_value_using_name (class, obj, slot_name); - if (SCM_GOOPS_UNBOUNDP (res)) - return scm_call_3 (SCM_VARIABLE_REF (var_slot_unbound), class, obj, slot_name); - return res; -} -#undef FUNC_NAME - - -SCM_DEFINE (scm_slot_set_using_class_x, "slot-set-using-class!", 4, 0, 0, - (SCM class, SCM obj, SCM slot_name, SCM value), - "") -#define FUNC_NAME s_scm_slot_set_using_class_x -{ - SCM_VALIDATE_CLASS (1, class); - SCM_VALIDATE_INSTANCE (2, obj); - SCM_VALIDATE_SYMBOL (3, slot_name); - - return set_slot_value_using_name (class, obj, slot_name, value); -} -#undef FUNC_NAME - - -SCM_DEFINE (scm_slot_bound_using_class_p, "slot-bound-using-class?", 3, 0, 0, - (SCM class, SCM obj, SCM slot_name), - "") -#define FUNC_NAME s_scm_slot_bound_using_class_p -{ - SCM_VALIDATE_CLASS (1, class); - SCM_VALIDATE_INSTANCE (2, obj); - SCM_VALIDATE_SYMBOL (3, slot_name); - - return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class, obj, slot_name)) - ? SCM_BOOL_F - : SCM_BOOL_T); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_slot_exists_using_class_p, "slot-exists-using-class?", 3, 0, 0, - (SCM class, SCM obj, SCM slot_name), - "") -#define FUNC_NAME s_scm_slot_exists_using_class_p -{ - SCM_VALIDATE_CLASS (1, class); - SCM_VALIDATE_INSTANCE (2, obj); - SCM_VALIDATE_SYMBOL (3, slot_name); - return test_slot_existence (class, obj, slot_name); -} -#undef FUNC_NAME - - - /* ======================================== */ - -SCM_DEFINE (scm_slot_ref, "slot-ref", 2, 0, 0, - (SCM obj, SCM slot_name), - "Return the value from @var{obj}'s slot with the name\n" - "@var{slot_name}.") -#define FUNC_NAME s_scm_slot_ref -{ - SCM res, class; - - SCM_VALIDATE_INSTANCE (1, obj); - TEST_CHANGE_CLASS (obj, class); - - res = get_slot_value_using_name (class, obj, slot_name); - if (SCM_GOOPS_UNBOUNDP (res)) - return scm_call_3 (SCM_VARIABLE_REF (var_slot_unbound), class, obj, slot_name); - return res; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_slot_set_x, "slot-set!", 3, 0, 0, - (SCM obj, SCM slot_name, SCM value), - "Set the slot named @var{slot_name} of @var{obj} to @var{value}.") -#define FUNC_NAME s_scm_slot_set_x -{ - SCM class; - - SCM_VALIDATE_INSTANCE (1, obj); - TEST_CHANGE_CLASS(obj, class); - - return set_slot_value_using_name (class, obj, slot_name, value); -} -#undef FUNC_NAME - -const char *scm_s_slot_set_x = s_scm_slot_set_x; - -SCM_DEFINE (scm_slot_bound_p, "slot-bound?", 2, 0, 0, - (SCM obj, SCM slot_name), - "Return @code{#t} if the slot named @var{slot_name} of @var{obj}\n" - "is bound.") -#define FUNC_NAME s_scm_slot_bound_p -{ - SCM class; - - SCM_VALIDATE_INSTANCE (1, obj); - TEST_CHANGE_CLASS(obj, class); - - return (SCM_GOOPS_UNBOUNDP (get_slot_value_using_name (class, - obj, - slot_name)) - ? SCM_BOOL_F - : SCM_BOOL_T); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_slot_exists_p, "slot-exists?", 2, 0, 0, - (SCM obj, SCM slot_name), - "Return @code{#t} if @var{obj} has a slot named @var{slot_name}.") -#define FUNC_NAME s_scm_slot_exists_p -{ - SCM class; - - SCM_VALIDATE_INSTANCE (1, obj); - SCM_VALIDATE_SYMBOL (2, slot_name); - TEST_CHANGE_CLASS (obj, class); - - return test_slot_existence (class, obj, slot_name); -} -#undef FUNC_NAME - - -/****************************************************************************** - * - * %allocate-instance (the low level instance allocation primitive) - * - ******************************************************************************/ - -static void clear_method_cache (SCM); - -SCM_DEFINE (scm_sys_allocate_instance, "%allocate-instance", 2, 0, 0, - (SCM class, SCM initargs), - "Create a new instance of class @var{class} and initialize it\n" - "from the arguments @var{initargs}.") -#define FUNC_NAME s_scm_sys_allocate_instance -{ - SCM obj; - scm_t_signed_bits n, i; - SCM layout; - - SCM_VALIDATE_CLASS (1, class); - - /* FIXME: duplicates some of scm_make_struct. */ - - n = SCM_I_INUM (SCM_SLOT (class, scm_si_nfields)); - obj = scm_i_alloc_struct (SCM_STRUCT_DATA (class), n); - - layout = SCM_VTABLE_LAYOUT (class); - - /* Set all SCM-holding slots to unbound */ - for (i = 0; i < n; i++) - { - scm_t_wchar c = scm_i_symbol_ref (layout, i*2); - if (c == 'p') - SCM_STRUCT_DATA (obj)[i] = SCM_UNPACK (SCM_GOOPS_UNBOUND); - else if (c == 's') - SCM_STRUCT_DATA (obj)[i] = SCM_UNPACK (obj); - else - SCM_STRUCT_DATA (obj)[i] = 0; - } - - if (SCM_CLASS_FLAGS (class) & SCM_CLASSF_PURE_GENERIC) - clear_method_cache (obj); - - return obj; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_sys_set_object_setter_x, "%set-object-setter!", 2, 0, 0, - (SCM obj, SCM setter), - "") -#define FUNC_NAME s_scm_sys_set_object_setter_x -{ - SCM_ASSERT (SCM_STRUCTP (obj) - && (SCM_OBJ_CLASS_FLAGS (obj) & SCM_CLASSF_PURE_GENERIC), - obj, - SCM_ARG1, - FUNC_NAME); - SCM_SET_GENERIC_SETTER (obj, setter); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -/****************************************************************************** - * - * %modify-instance (used by change-class to modify in place) - * - ******************************************************************************/ - -SCM_DEFINE (scm_sys_modify_instance, "%modify-instance", 2, 0, 0, - (SCM old, SCM new), - "") -#define FUNC_NAME s_scm_sys_modify_instance -{ - SCM_VALIDATE_INSTANCE (1, old); - SCM_VALIDATE_INSTANCE (2, new); - - /* Exchange the data contained in old and new. We exchange rather than - * scratch the old value with new to be correct with GC. - * See "Class redefinition protocol above". - */ - SCM_CRITICAL_SECTION_START; - { - scm_t_bits word0, word1; - word0 = SCM_CELL_WORD_0 (old); - word1 = SCM_CELL_WORD_1 (old); - SCM_SET_CELL_WORD_0 (old, SCM_CELL_WORD_0 (new)); - SCM_SET_CELL_WORD_1 (old, SCM_CELL_WORD_1 (new)); - SCM_SET_CELL_WORD_0 (new, word0); - SCM_SET_CELL_WORD_1 (new, word1); - } - SCM_CRITICAL_SECTION_END; - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_sys_modify_class, "%modify-class", 2, 0, 0, - (SCM old, SCM new), - "") -#define FUNC_NAME s_scm_sys_modify_class -{ - SCM_VALIDATE_CLASS (1, old); - SCM_VALIDATE_CLASS (2, new); - - SCM_CRITICAL_SECTION_START; - { - scm_t_bits word0, word1; - word0 = SCM_CELL_WORD_0 (old); - word1 = SCM_CELL_WORD_1 (old); - SCM_SET_CELL_WORD_0 (old, SCM_CELL_WORD_0 (new)); - SCM_SET_CELL_WORD_1 (old, SCM_CELL_WORD_1 (new)); - SCM_STRUCT_DATA (old)[scm_vtable_index_self] = SCM_UNPACK (old); - SCM_SET_CELL_WORD_0 (new, word0); - SCM_SET_CELL_WORD_1 (new, word1); - SCM_STRUCT_DATA (new)[scm_vtable_index_self] = SCM_UNPACK (new); - } - SCM_CRITICAL_SECTION_END; - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_sys_invalidate_class, "%invalidate-class", 1, 0, 0, - (SCM class), - "") -#define FUNC_NAME s_scm_sys_invalidate_class -{ - SCM_VALIDATE_CLASS (1, class); - SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -/* When instances change class, they finally get a new body, but - * before that, they go through purgatory in hell. Odd as it may - * seem, this data structure saves us from eternal suffering in - * infinite recursions. - */ - -static scm_t_bits **hell; -static long n_hell = 1; /* one place for the evil one himself */ -static long hell_size = 4; -static SCM hell_mutex; - -static long -burnin (SCM o) -{ - long i; - for (i = 1; i < n_hell; ++i) - if (SCM_STRUCT_DATA (o) == hell[i]) - return i; - return 0; -} - -static void -go_to_hell (void *o) -{ - SCM obj = *(SCM*)o; - scm_lock_mutex (hell_mutex); - if (n_hell >= hell_size) - { - hell_size *= 2; - hell = scm_realloc (hell, hell_size * sizeof(*hell)); - } - hell[n_hell++] = SCM_STRUCT_DATA (obj); - scm_unlock_mutex (hell_mutex); -} - -static void -go_to_heaven (void *o) -{ - SCM obj = *(SCM*)o; - scm_lock_mutex (hell_mutex); - hell[burnin (obj)] = hell[--n_hell]; - scm_unlock_mutex (hell_mutex); -} - - -SCM_SYMBOL (scm_sym_change_class, "change-class"); - -static SCM -purgatory (SCM obj, SCM new_class) -{ - return scm_call_2 (SCM_VARIABLE_REF (var_change_class), obj, new_class); -} - -/* This function calls the generic function change-class for all - * instances which aren't currently undergoing class change. - */ - -void -scm_change_object_class (SCM obj, SCM old_class SCM_UNUSED, SCM new_class) -{ - if (!burnin (obj)) - { - scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE); - scm_dynwind_rewind_handler (go_to_hell, &obj, SCM_F_WIND_EXPLICITLY); - scm_dynwind_unwind_handler (go_to_heaven, &obj, SCM_F_WIND_EXPLICITLY); - purgatory (obj, new_class); - scm_dynwind_end (); - } -} - -/****************************************************************************** - * - * GGGG FFFFF - * G F - * G GG FFF - * G G F - * GGG E N E R I C F U N C T I O N S - * - * This implementation provides - * - generic functions (with class specializers) - * - multi-methods - * - next-method - * - a hard-coded MOP for standard gf, which can be overloaded for non-std gf - * - ******************************************************************************/ - -SCM_KEYWORD (k_name, "name"); - -SCM_GLOBAL_SYMBOL (scm_sym_args, "args"); - - -SCM_SYMBOL (sym_delayed_compile, "delayed-compile"); -static SCM -make_dispatch_procedure (SCM gf) -{ - static SCM var = SCM_BOOL_F; - if (scm_is_false (var)) - var = scm_module_variable (scm_c_resolve_module ("oop goops dispatch"), - sym_delayed_compile); - return scm_call_1 (SCM_VARIABLE_REF (var), gf); -} - -static void -clear_method_cache (SCM gf) -{ - SCM_SET_GENERIC_DISPATCH_PROCEDURE (gf, make_dispatch_procedure (gf)); - SCM_CLEAR_GENERIC_EFFECTIVE_METHODS (gf); -} - -SCM_DEFINE (scm_sys_invalidate_method_cache_x, "%invalidate-method-cache!", 1, 0, 0, - (SCM gf), - "") -#define FUNC_NAME s_scm_sys_invalidate_method_cache_x -{ - SCM_ASSERT (SCM_PUREGENERICP (gf), gf, SCM_ARG1, FUNC_NAME); - clear_method_cache (gf); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_generic_capability_p, "generic-capability?", 1, 0, 0, - (SCM proc), - "") -#define FUNC_NAME s_scm_generic_capability_p -{ - SCM_ASSERT (scm_is_true (scm_procedure_p (proc)), - proc, SCM_ARG1, FUNC_NAME); - return (SCM_PRIMITIVE_GENERIC_P (proc) ? SCM_BOOL_T : SCM_BOOL_F); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_enable_primitive_generic_x, "enable-primitive-generic!", 0, 0, 1, - (SCM subrs), - "") -#define FUNC_NAME s_scm_enable_primitive_generic_x -{ - SCM_VALIDATE_REST_ARGUMENT (subrs); - while (!scm_is_null (subrs)) - { - SCM subr = SCM_CAR (subrs); - SCM_ASSERT (SCM_PRIMITIVE_GENERIC_P (subr), subr, SCM_ARGn, FUNC_NAME); - SCM_SET_SUBR_GENERIC (subr, - scm_make (scm_list_3 (scm_class_generic, - k_name, - SCM_SUBR_NAME (subr)))); - subrs = SCM_CDR (subrs); - } - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_set_primitive_generic_x, "set-primitive-generic!", 2, 0, 0, - (SCM subr, SCM generic), - "") -#define FUNC_NAME s_scm_set_primitive_generic_x -{ - SCM_ASSERT (SCM_PRIMITIVE_GENERIC_P (subr), subr, SCM_ARG1, FUNC_NAME); - SCM_ASSERT (SCM_PUREGENERICP (generic), generic, SCM_ARG2, FUNC_NAME); - SCM_SET_SUBR_GENERIC (subr, generic); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_primitive_generic_generic, "primitive-generic-generic", 1, 0, 0, - (SCM subr), - "") -#define FUNC_NAME s_scm_primitive_generic_generic -{ - if (SCM_PRIMITIVE_GENERIC_P (subr)) - { - if (!SCM_UNPACK (*SCM_SUBR_GENERIC (subr))) - scm_enable_primitive_generic_x (scm_list_1 (subr)); - return *SCM_SUBR_GENERIC (subr); - } - SCM_WRONG_TYPE_ARG (SCM_ARG1, subr); -} -#undef FUNC_NAME - -typedef struct t_extension { - struct t_extension *next; - SCM extended; - SCM extension; -} t_extension; - - -/* Hint for `scm_gc_malloc ()' et al. when allocating `t_extension' - objects. */ -static const char extension_gc_hint[] = "GOOPS extension"; - -static t_extension *extensions = 0; - -void -scm_c_extend_primitive_generic (SCM extended, SCM extension) -{ - if (goops_loaded_p) - { - SCM gf, gext; - if (!SCM_UNPACK (*SCM_SUBR_GENERIC (extended))) - scm_enable_primitive_generic_x (scm_list_1 (extended)); - gf = *SCM_SUBR_GENERIC (extended); - gext = scm_call_2 (SCM_VARIABLE_REF (scm_var_make_extended_generic), - gf, - SCM_SUBR_NAME (extension)); - SCM_SET_SUBR_GENERIC (extension, gext); - } - else - { - t_extension *e = scm_gc_malloc (sizeof (t_extension), - extension_gc_hint); - t_extension **loc = &extensions; - /* Make sure that extensions are placed before their own - * extensions in the extensions list. O(N^2) algorithm, but - * extensions of primitive generics are rare. - */ - while (*loc && !scm_is_eq (extension, (*loc)->extended)) - loc = &(*loc)->next; - e->next = *loc; - e->extended = extended; - e->extension = extension; - *loc = e; - } -} - -static void -setup_extended_primitive_generics () -{ - while (extensions) - { - t_extension *e = extensions; - scm_c_extend_primitive_generic (e->extended, e->extension); - extensions = e->next; - } -} - -/* Dirk:FIXME:: In all of these scm_wta_dispatch_* routines it is - * assumed that 'gf' is zero if uninitialized. It would be cleaner if - * some valid SCM value like SCM_BOOL_F or SCM_UNDEFINED were chosen. - */ - -SCM -scm_wta_dispatch_0 (SCM gf, const char *subr) -{ - if (!SCM_UNPACK (gf)) - scm_error_num_args_subr (subr); - - return scm_call_0 (gf); -} - -SCM -scm_wta_dispatch_1 (SCM gf, SCM a1, int pos, const char *subr) -{ - if (!SCM_UNPACK (gf)) - scm_wrong_type_arg (subr, pos, a1); - - return scm_call_1 (gf, a1); -} - -SCM -scm_wta_dispatch_2 (SCM gf, SCM a1, SCM a2, int pos, const char *subr) -{ - if (!SCM_UNPACK (gf)) - scm_wrong_type_arg (subr, pos, (pos == SCM_ARG1) ? a1 : a2); - - return scm_call_2 (gf, a1, a2); -} - -SCM -scm_wta_dispatch_n (SCM gf, SCM args, int pos, const char *subr) -{ - if (!SCM_UNPACK (gf)) - scm_wrong_type_arg (subr, pos, scm_list_ref (args, scm_from_int (pos))); - - return scm_apply_0 (gf, args); -} - -/****************************************************************************** - * - * Protocol for calling a generic fumction - * This protocol is roughly equivalent to (parameter are a little bit different - * for efficiency reasons): - * - * + apply-generic (gf args) - * + compute-applicable-methods (gf args ...) - * + sort-applicable-methods (methods args) - * + apply-methods (gf methods args) - * - * apply-methods calls make-next-method to build the "continuation" of a a - * method. Applying a next-method will call apply-next-method which in - * turn will call apply again to call effectively the following method. - * - ******************************************************************************/ - -static int -applicablep (SCM actual, SCM formal) -{ - /* We already know that the cpl is well formed. */ - return scm_is_true (scm_c_memq (formal, SCM_SLOT (actual, scm_si_cpl))); -} - -static int -more_specificp (SCM m1, SCM m2, SCM const *targs) -{ - register SCM s1, s2; - register long i; - /* - * Note: - * m1 and m2 can have != length (i.e. one can be one element longer than the - * other when we have a dotted parameter list). For instance, with the call - * (M 1) - * with - * (define-method M (a . l) ....) - * (define-method M (a) ....) - * - * we consider that the second method is more specific. - * - * BTW, targs is an array of types. We don't need it's size since - * we already know that m1 and m2 are applicable (no risk to go past - * the end of this array). - * - */ - for (i=0, s1=SPEC_OF(m1), s2=SPEC_OF(m2); ; i++, s1=SCM_CDR(s1), s2=SCM_CDR(s2)) { - if (scm_is_null(s1)) return 1; - if (scm_is_null(s2)) return 0; - if (!scm_is_eq (SCM_CAR(s1), SCM_CAR(s2))) { - register SCM l, cs1 = SCM_CAR(s1), cs2 = SCM_CAR(s2); - - for (l = SCM_SLOT (targs[i], scm_si_cpl); ; l = SCM_CDR(l)) { - if (scm_is_eq (cs1, SCM_CAR (l))) - return 1; - if (scm_is_eq (cs2, SCM_CAR (l))) - return 0; - } - return 0;/* should not occur! */ - } - } - return 0; /* should not occur! */ -} - -#define BUFFSIZE 32 /* big enough for most uses */ - -static SCM -scm_i_vector2list (SCM l, long len) -{ - long j; - SCM z = scm_c_make_vector (len, SCM_UNDEFINED); - - for (j = 0; j < len; j++, l = SCM_CDR (l)) { - SCM_SIMPLE_VECTOR_SET (z, j, SCM_CAR (l)); - } - return z; -} - -static SCM -sort_applicable_methods (SCM method_list, long size, SCM const *targs) -{ - long i, j, incr; - SCM *v, vector = SCM_EOL; - SCM buffer[BUFFSIZE]; - SCM save = method_list; - scm_t_array_handle handle; - - /* For reasonably sized method_lists we can try to avoid all the - * consing and reorder the list in place... - * This idea is due to David McClain - */ - if (size <= BUFFSIZE) - { - for (i = 0; i < size; i++) - { - buffer[i] = SCM_CAR (method_list); - method_list = SCM_CDR (method_list); - } - v = buffer; - } - else - { - /* Too many elements in method_list to keep everything locally */ - vector = scm_i_vector2list (save, size); - v = scm_vector_writable_elements (vector, &handle, NULL, NULL); - } - - /* Use a simple shell sort since it is generally faster than qsort on - * small vectors (which is probably mostly the case when we have to - * sort a list of applicable methods). - */ - for (incr = size / 2; incr; incr /= 2) - { - for (i = incr; i < size; i++) - { - for (j = i - incr; j >= 0; j -= incr) - { - if (more_specificp (v[j], v[j+incr], targs)) - break; - else - { - SCM tmp = v[j + incr]; - v[j + incr] = v[j]; - v[j] = tmp; - } - } - } - } - - if (size <= BUFFSIZE) - { - /* We did it in locally, so restore the original list (reordered) in-place */ - for (i = 0, method_list = save; i < size; i++, v++) - { - SCM_SETCAR (method_list, *v); - method_list = SCM_CDR (method_list); - } - return save; - } - - /* If we are here, that's that we did it the hard way... */ - scm_array_handle_release (&handle); - return scm_vector_to_list (vector); -} - -SCM -scm_compute_applicable_methods (SCM gf, SCM args, long len, int find_method_p) -{ - register long i; - long count = 0; - SCM l, fl, applicable = SCM_EOL; - SCM save = args; - SCM buffer[BUFFSIZE]; - SCM const *types; - SCM *p; - SCM tmp = SCM_EOL; - scm_t_array_handle handle; - - /* Build the list of arguments types */ - if (len >= BUFFSIZE) - { - tmp = scm_c_make_vector (len, SCM_UNDEFINED); - types = p = scm_vector_writable_elements (tmp, &handle, NULL, NULL); - - /* - note that we don't have to work to reset the generation - count. TMP is a new vector anyway, and it is found - conservatively. - */ - } - else - types = p = buffer; - - for ( ; !scm_is_null (args); args = SCM_CDR (args)) - *p++ = scm_class_of (SCM_CAR (args)); - - /* Build a list of all applicable methods */ - for (l = scm_generic_function_methods (gf); !scm_is_null (l); l = SCM_CDR (l)) - { - fl = SPEC_OF (SCM_CAR (l)); - for (i = 0; ; i++, fl = SCM_CDR (fl)) - { - if (SCM_INSTANCEP (fl) - /* We have a dotted argument list */ - || (i >= len && scm_is_null (fl))) - { /* both list exhausted */ - applicable = scm_cons (SCM_CAR (l), applicable); - count += 1; - break; - } - if (i >= len - || scm_is_null (fl) - || !applicablep (types[i], SCM_CAR (fl))) - break; - } - } - - if (len >= BUFFSIZE) - scm_array_handle_release (&handle); - - if (count == 0) - { - if (find_method_p) - return SCM_BOOL_F; - scm_call_2 (SCM_VARIABLE_REF (var_no_applicable_method), gf, save); - /* if we are here, it's because no-applicable-method hasn't signaled an error */ - return SCM_BOOL_F; - } - - return (count == 1 - ? applicable - : sort_applicable_methods (applicable, count, types)); -} - -#if 0 -SCM_PROC (s_sys_compute_applicable_methods, "%compute-applicable-methods", 2, 0, 0, scm_sys_compute_applicable_methods); -#endif - -static const char s_sys_compute_applicable_methods[] = "%compute-applicable-methods"; - -SCM -scm_sys_compute_applicable_methods (SCM gf, SCM args) -#define FUNC_NAME s_sys_compute_applicable_methods -{ - long n; - SCM_VALIDATE_GENERIC (1, gf); - n = scm_ilength (args); - SCM_ASSERT (n >= 0, args, SCM_ARG2, FUNC_NAME); - return scm_compute_applicable_methods (gf, args, n, 1); -} -#undef FUNC_NAME - -SCM_SYMBOL (sym_compute_applicable_methods, "compute-applicable-methods"); -SCM_VARIABLE_INIT (var_compute_applicable_methods, "compute-applicable-methods", - scm_c_define_gsubr (s_sys_compute_applicable_methods, 2, 0, 0, - scm_sys_compute_applicable_methods)); - -/****************************************************************************** - * - * A simple make (which will be redefined later in Scheme) - * This version handles only creation of gf, methods and classes (no instances) - * - * Since this code will disappear when Goops will be fully booted, - * no precaution is taken to be efficient. - * - ******************************************************************************/ - -SCM_KEYWORD (k_setter, "setter"); -SCM_KEYWORD (k_specializers, "specializers"); -SCM_KEYWORD (k_procedure, "procedure"); -SCM_KEYWORD (k_formals, "formals"); -SCM_KEYWORD (k_body, "body"); -SCM_KEYWORD (k_make_procedure, "make-procedure"); -SCM_KEYWORD (k_dsupers, "dsupers"); -SCM_KEYWORD (k_slots, "slots"); -SCM_KEYWORD (k_gf, "generic-function"); - -SCM_DEFINE (scm_make, "make", 0, 0, 1, - (SCM args), - "Make a new object. @var{args} must contain the class and\n" - "all necessary initialization information.") -#define FUNC_NAME s_scm_make -{ - SCM class, z; - long len = scm_ilength (args); - - if (len <= 0 || (len & 1) == 0) - SCM_WRONG_NUM_ARGS (); - - class = SCM_CAR(args); - args = SCM_CDR(args); - - if (scm_is_eq (class, scm_class_generic) - || scm_is_eq (class, scm_class_accessor)) - { - z = scm_make_struct (class, SCM_INUM0, - scm_list_4 (SCM_BOOL_F, - SCM_EOL, - SCM_INUM0, - SCM_EOL)); - scm_set_procedure_property_x (z, scm_sym_name, - scm_get_keyword (k_name, - args, - SCM_BOOL_F)); - clear_method_cache (z); - if (scm_is_eq (class, scm_class_accessor)) - { - SCM setter = scm_get_keyword (k_setter, args, SCM_BOOL_F); - if (scm_is_true (setter)) - scm_sys_set_object_setter_x (z, setter); - } - } - else - { - z = scm_sys_allocate_instance (class, args); - - if (scm_is_eq (class, scm_class_method) - || scm_is_eq (class, scm_class_accessor_method)) - { - SCM_SET_SLOT (z, scm_si_generic_function, - scm_i_get_keyword (k_gf, - args, - len - 1, - SCM_BOOL_F, - FUNC_NAME)); - SCM_SET_SLOT (z, scm_si_specializers, - scm_i_get_keyword (k_specializers, - args, - len - 1, - SCM_EOL, - FUNC_NAME)); - SCM_SET_SLOT (z, scm_si_procedure, - scm_i_get_keyword (k_procedure, - args, - len - 1, - SCM_BOOL_F, - FUNC_NAME)); - SCM_SET_SLOT (z, scm_si_formals, - scm_i_get_keyword (k_formals, - args, - len - 1, - SCM_EOL, - FUNC_NAME)); - SCM_SET_SLOT (z, scm_si_body, - scm_i_get_keyword (k_body, - args, - len - 1, - SCM_EOL, - FUNC_NAME)); - SCM_SET_SLOT (z, scm_si_make_procedure, - scm_i_get_keyword (k_make_procedure, - args, - len - 1, - SCM_BOOL_F, - FUNC_NAME)); - } - else - { - /* In all the others case, make a new class .... No instance here */ - SCM_SET_SLOT (z, scm_vtable_index_name, - scm_i_get_keyword (k_name, - args, - len - 1, - scm_from_latin1_symbol ("???"), - FUNC_NAME)); - SCM_SET_SLOT (z, scm_si_direct_supers, - scm_i_get_keyword (k_dsupers, - args, - len - 1, - SCM_EOL, - FUNC_NAME)); - SCM_SET_SLOT (z, scm_si_direct_slots, - scm_i_get_keyword (k_slots, - args, - len - 1, - SCM_EOL, - FUNC_NAME)); - } - } - return z; -} -#undef FUNC_NAME - -SCM_DEFINE (scm_find_method, "find-method", 0, 0, 1, - (SCM l), - "") -#define FUNC_NAME s_scm_find_method -{ - SCM gf; - long len = scm_ilength (l); - - if (len == 0) - SCM_WRONG_NUM_ARGS (); - - gf = SCM_CAR(l); l = SCM_CDR(l); - SCM_VALIDATE_GENERIC (1, gf); - if (scm_is_null (SCM_SLOT (gf, scm_si_methods))) - SCM_MISC_ERROR ("no methods for generic ~S", scm_list_1 (gf)); - - return scm_compute_applicable_methods (gf, l, len - 1, 1); -} -#undef FUNC_NAME - -SCM_DEFINE (scm_sys_method_more_specific_p, "%method-more-specific?", 3, 0, 0, - (SCM m1, SCM m2, SCM targs), - "Return true if method @var{m1} is more specific than @var{m2} " - "given the argument types (classes) listed in @var{targs}.") -#define FUNC_NAME s_scm_sys_method_more_specific_p -{ - SCM l, v, result; - SCM *v_elts; - long i, len, m1_specs, m2_specs; - scm_t_array_handle handle; - - SCM_VALIDATE_METHOD (1, m1); - SCM_VALIDATE_METHOD (2, m2); - - len = scm_ilength (targs); - m1_specs = scm_ilength (SPEC_OF (m1)); - m2_specs = scm_ilength (SPEC_OF (m2)); - SCM_ASSERT ((len >= m1_specs) || (len >= m2_specs), - targs, SCM_ARG3, FUNC_NAME); - - /* Verify that all the arguments of TARGS are classes and place them - in a vector. */ - - v = scm_c_make_vector (len, SCM_EOL); - v_elts = scm_vector_writable_elements (v, &handle, NULL, NULL); - - for (i = 0, l = targs; - i < len && scm_is_pair (l); - i++, l = SCM_CDR (l)) - { - SCM_ASSERT (SCM_CLASSP (SCM_CAR (l)), targs, SCM_ARG3, FUNC_NAME); - v_elts[i] = SCM_CAR (l); - } - result = more_specificp (m1, m2, v_elts) ? SCM_BOOL_T: SCM_BOOL_F; - - scm_array_handle_release (&handle); - - return result; -} -#undef FUNC_NAME - - - -/****************************************************************************** - * - * Initializations - * - ******************************************************************************/ - -/* Munge the CPL of C in place such that BEFORE appears before AFTER, - assuming that currently the reverse is true. Recalculate slots and - associated getters-n-setters. */ -static void -fix_cpl (SCM c, SCM before, SCM after) -{ - SCM cpl = SCM_SLOT (c, scm_si_cpl); - SCM ls = scm_c_memq (after, cpl); - SCM tail; - - if (scm_is_false (ls)) - /* if this condition occurs, fix_cpl should not be applied this way */ - abort (); - - tail = scm_delq1_x (before, SCM_CDR (ls)); - SCM_SETCAR (ls, before); - SCM_SETCDR (ls, scm_cons (after, tail)); - { - SCM dslots = SCM_SLOT (c, scm_si_direct_slots); - SCM slots = build_slots_list (maplist (dslots), cpl); - SCM g_n_s = compute_getters_n_setters (slots); - SCM_SET_SLOT (c, scm_si_slots, slots); - SCM_SET_SLOT (c, scm_si_getters_n_setters, g_n_s); - } -} - - -static void -make_stdcls (SCM *var, char *name, SCM meta, SCM super, SCM slots) -{ - SCM tmp = scm_from_utf8_symbol (name); - - *var = scm_basic_make_class (meta, tmp, - scm_is_pair (super) ? super : scm_list_1 (super), - slots); - scm_module_define (scm_module_goops, tmp, *var); -} - - -SCM_KEYWORD (k_slot_definition, "slot-definition"); - -static void -create_standard_classes (void) -{ - SCM slots; - SCM method_slots = scm_list_n (scm_from_latin1_symbol ("generic-function"), - scm_from_latin1_symbol ("specializers"), - sym_procedure, - scm_from_latin1_symbol ("formals"), - scm_from_latin1_symbol ("body"), - scm_from_latin1_symbol ("make-procedure"), - SCM_UNDEFINED); - SCM amethod_slots = scm_list_1 (scm_list_3 (scm_from_latin1_symbol ("slot-definition"), - k_init_keyword, - k_slot_definition)); - SCM gf_slots = scm_list_4 (scm_from_latin1_symbol ("methods"), - scm_list_3 (scm_from_latin1_symbol ("n-specialized"), - k_init_value, - SCM_INUM0), - scm_list_3 (scm_from_latin1_symbol ("extended-by"), - k_init_value, - SCM_EOL), - scm_from_latin1_symbol ("effective-methods")); - SCM setter_slots = scm_list_1 (sym_setter); - SCM egf_slots = scm_list_1 (scm_list_3 (scm_from_latin1_symbol ("extends"), - k_init_value, - SCM_EOL)); - /* Foreign class slot classes */ - make_stdcls (&scm_class_foreign_slot, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_protected, "", - scm_class_class, scm_class_foreign_slot, SCM_EOL); - make_stdcls (&scm_class_hidden, "", - scm_class_class, scm_class_foreign_slot, SCM_EOL); - make_stdcls (&scm_class_opaque, "", - scm_class_class, scm_class_foreign_slot, SCM_EOL); - make_stdcls (&scm_class_read_only, "", - scm_class_class, scm_class_foreign_slot, SCM_EOL); - make_stdcls (&scm_class_self, "", - scm_class_class, scm_class_read_only, SCM_EOL); - make_stdcls (&scm_class_protected_opaque, "", - scm_class_class, - scm_list_2 (scm_class_protected, scm_class_opaque), - SCM_EOL); - make_stdcls (&scm_class_protected_hidden, "", - scm_class_class, - scm_list_2 (scm_class_protected, scm_class_hidden), - SCM_EOL); - make_stdcls (&scm_class_protected_read_only, "", - scm_class_class, - scm_list_2 (scm_class_protected, scm_class_read_only), - SCM_EOL); - make_stdcls (&scm_class_scm, "", - scm_class_class, scm_class_protected, SCM_EOL); - make_stdcls (&scm_class_int, "", - scm_class_class, scm_class_foreign_slot, SCM_EOL); - make_stdcls (&scm_class_float, "", - scm_class_class, scm_class_foreign_slot, SCM_EOL); - make_stdcls (&scm_class_double, "", - scm_class_class, scm_class_foreign_slot, SCM_EOL); - - /* Continue initialization of class */ - - slots = build_class_class_slots (); - SCM_SET_SLOT (scm_class_class, scm_si_direct_slots, slots); - SCM_SET_SLOT (scm_class_class, scm_si_slots, slots); - SCM_SET_SLOT (scm_class_class, scm_si_getters_n_setters, - compute_getters_n_setters (slots)); - - /* scm_class_generic functions classes */ - make_stdcls (&scm_class_procedure_class, "", - scm_class_class, scm_class_class, SCM_EOL); - make_stdcls (&scm_class_applicable_struct_class, "", - scm_class_class, scm_class_procedure_class, SCM_EOL); - SCM_SET_VTABLE_FLAGS (scm_class_applicable_struct_class, SCM_VTABLE_FLAG_APPLICABLE_VTABLE); - make_stdcls (&scm_class_method, "", - scm_class_class, scm_class_object, method_slots); - make_stdcls (&scm_class_accessor_method, "", - scm_class_class, scm_class_method, amethod_slots); - make_stdcls (&scm_class_applicable, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_applicable_struct, "", - scm_class_applicable_struct_class, - scm_list_2 (scm_class_object, scm_class_applicable), - scm_list_1 (sym_procedure)); - make_stdcls (&scm_class_generic, "", - scm_class_applicable_struct_class, scm_class_applicable_struct, gf_slots); - SCM_SET_CLASS_FLAGS (scm_class_generic, SCM_CLASSF_PURE_GENERIC); - make_stdcls (&scm_class_extended_generic, "", - scm_class_applicable_struct_class, scm_class_generic, egf_slots); - SCM_SET_CLASS_FLAGS (scm_class_extended_generic, SCM_CLASSF_PURE_GENERIC); - make_stdcls (&scm_class_generic_with_setter, "", - scm_class_applicable_struct_class, scm_class_generic, setter_slots); - SCM_SET_CLASS_FLAGS (scm_class_generic_with_setter, SCM_CLASSF_PURE_GENERIC); - make_stdcls (&scm_class_accessor, "", - scm_class_applicable_struct_class, scm_class_generic_with_setter, SCM_EOL); - SCM_SET_CLASS_FLAGS (scm_class_accessor, SCM_CLASSF_PURE_GENERIC); - make_stdcls (&scm_class_extended_generic_with_setter, - "", - scm_class_applicable_struct_class, - scm_list_2 (scm_class_extended_generic, - scm_class_generic_with_setter), - SCM_EOL); - SCM_SET_CLASS_FLAGS (scm_class_extended_generic_with_setter, - SCM_CLASSF_PURE_GENERIC); - make_stdcls (&scm_class_extended_accessor, "", - scm_class_applicable_struct_class, - scm_list_2 (scm_class_accessor, - scm_class_extended_generic_with_setter), - SCM_EOL); - /* is misplaced. */ - fix_cpl (scm_class_extended_accessor, - scm_class_extended_generic, scm_class_generic_with_setter); - SCM_SET_CLASS_FLAGS (scm_class_extended_accessor, SCM_CLASSF_PURE_GENERIC); - - /* Primitive types classes */ - make_stdcls (&scm_class_boolean, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_char, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_list, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_pair, "", - scm_class_class, scm_class_list, SCM_EOL); - make_stdcls (&scm_class_null, "", - scm_class_class, scm_class_list, SCM_EOL); - make_stdcls (&scm_class_string, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_symbol, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_vector, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_foreign, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_hashtable, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_fluid, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_dynamic_state, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_frame, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_objcode, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_vm, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_vm_cont, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_bytevector, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_uvec, "", - scm_class_class, class_bytevector, SCM_EOL); - make_stdcls (&class_array, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&class_bitvector, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_number, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_complex, "", - scm_class_class, scm_class_number, SCM_EOL); - make_stdcls (&scm_class_real, "", - scm_class_class, scm_class_complex, SCM_EOL); - make_stdcls (&scm_class_integer, "", - scm_class_class, scm_class_real, SCM_EOL); - make_stdcls (&scm_class_fraction, "", - scm_class_class, scm_class_real, SCM_EOL); - make_stdcls (&scm_class_keyword, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_unknown, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_procedure, "", - scm_class_procedure_class, scm_class_applicable, SCM_EOL); - make_stdcls (&scm_class_primitive_generic, "", - scm_class_procedure_class, scm_class_procedure, SCM_EOL); - make_stdcls (&scm_class_port, "", - scm_class_class, scm_class_top, SCM_EOL); - make_stdcls (&scm_class_input_port, "", - scm_class_class, scm_class_port, SCM_EOL); - make_stdcls (&scm_class_output_port, "", - scm_class_class, scm_class_port, SCM_EOL); - make_stdcls (&scm_class_input_output_port, "", - scm_class_class, - scm_list_2 (scm_class_input_port, scm_class_output_port), - SCM_EOL); -} - -/********************************************************************** - * - * Smob classes - * - **********************************************************************/ - -static SCM -make_class_from_template (char const *template, char const *type_name, SCM supers, int applicablep) -{ - SCM name; - if (type_name) - { - char buffer[100]; - sprintf (buffer, template, type_name); - name = scm_from_utf8_symbol (buffer); - } - else - name = SCM_GOOPS_UNBOUND; - - return scm_basic_make_class (applicablep ? scm_class_procedure_class : scm_class_class, - name, supers, SCM_EOL); -} - -static SCM -make_class_from_symbol (SCM type_name_sym, SCM supers, int applicablep) -{ - SCM name; - - if (scm_is_true (type_name_sym)) - { - name = scm_string_append (scm_list_3 (scm_from_locale_string ("<"), - scm_symbol_to_string (type_name_sym), - scm_from_locale_string (">"))); - name = scm_string_to_symbol (name); - } - else - name = SCM_GOOPS_UNBOUND; - - return scm_basic_make_class (applicablep ? scm_class_procedure_class : scm_class_class, - name, supers, SCM_EOL); -} - -SCM -scm_make_extended_class (char const *type_name, int applicablep) -{ - return make_class_from_template ("<%s>", - type_name, - scm_list_1 (applicablep - ? scm_class_applicable - : scm_class_top), - applicablep); -} - -static SCM -scm_make_extended_class_from_symbol (SCM type_name_sym, int applicablep) -{ - return make_class_from_symbol (type_name_sym, - scm_list_1 (applicablep - ? scm_class_applicable - : scm_class_top), - applicablep); -} - -void -scm_i_inherit_applicable (SCM c) -{ - if (!SCM_SUBCLASSP (c, scm_class_applicable)) - { - SCM dsupers = SCM_SLOT (c, scm_si_direct_supers); - SCM cpl = SCM_SLOT (c, scm_si_cpl); - /* patch scm_class_applicable into direct-supers */ - SCM top = scm_c_memq (scm_class_top, dsupers); - if (scm_is_false (top)) - dsupers = scm_append (scm_list_2 (dsupers, - scm_list_1 (scm_class_applicable))); - else - { - SCM_SETCAR (top, scm_class_applicable); - SCM_SETCDR (top, scm_cons (scm_class_top, SCM_CDR (top))); - } - SCM_SET_SLOT (c, scm_si_direct_supers, dsupers); - /* patch scm_class_applicable into cpl */ - top = scm_c_memq (scm_class_top, cpl); - if (scm_is_false (top)) - abort (); - else - { - SCM_SETCAR (top, scm_class_applicable); - SCM_SETCDR (top, scm_cons (scm_class_top, SCM_CDR (top))); - } - /* add class to direct-subclasses of scm_class_applicable */ - SCM_SET_SLOT (scm_class_applicable, - scm_si_direct_subclasses, - scm_cons (c, SCM_SLOT (scm_class_applicable, - scm_si_direct_subclasses))); - } -} - -static void -create_smob_classes (void) -{ - long i; - - for (i = 0; i < SCM_I_MAX_SMOB_TYPE_COUNT; ++i) - scm_smob_class[i] = SCM_BOOL_F; - - scm_smob_class[SCM_TC2SMOBNUM (scm_tc16_keyword)] = scm_class_keyword; - - for (i = 0; i < scm_numsmob; ++i) - if (scm_is_false (scm_smob_class[i])) - scm_smob_class[i] = scm_make_extended_class (SCM_SMOBNAME (i), - scm_smobs[i].apply != 0); -} - -void -scm_make_port_classes (long ptobnum, char *type_name) -{ - SCM c, class = make_class_from_template ("<%s-port>", - type_name, - scm_list_1 (scm_class_port), - 0); - scm_port_class[SCM_IN_PCLASS_INDEX + ptobnum] - = make_class_from_template ("<%s-input-port>", - type_name, - scm_list_2 (class, scm_class_input_port), - 0); - scm_port_class[SCM_OUT_PCLASS_INDEX + ptobnum] - = make_class_from_template ("<%s-output-port>", - type_name, - scm_list_2 (class, scm_class_output_port), - 0); - scm_port_class[SCM_INOUT_PCLASS_INDEX + ptobnum] - = c - = make_class_from_template ("<%s-input-output-port>", - type_name, - scm_list_2 (class, scm_class_input_output_port), - 0); - /* Patch cpl (since this tree is too complex for the C level compute-cpl) */ - SCM_SET_SLOT (c, scm_si_cpl, - scm_cons2 (c, class, SCM_SLOT (scm_class_input_output_port, scm_si_cpl))); -} - -static void -create_port_classes (void) -{ - long i; - - for (i = scm_c_num_port_types () - 1; i >= 0; i--) - scm_make_port_classes (i, SCM_PTOBNAME (i)); -} - -static SCM -make_struct_class (void *closure SCM_UNUSED, - SCM vtable, SCM data, SCM prev SCM_UNUSED) -{ - if (scm_is_false (data)) - scm_i_define_class_for_vtable (vtable); - return SCM_UNSPECIFIED; -} - -static void -create_struct_classes (void) -{ - /* FIXME: take the vtable_class_map while initializing goops? */ - scm_internal_hash_fold (make_struct_class, 0, SCM_BOOL_F, - vtable_class_map); -} - -/********************************************************************** - * - * C interface - * - **********************************************************************/ - -void -scm_load_goops () -{ - if (!goops_loaded_p) - scm_c_resolve_module ("oop goops"); -} - - -SCM_SYMBOL (sym_o, "o"); -SCM_SYMBOL (sym_x, "x"); - -SCM_KEYWORD (k_accessor, "accessor"); -SCM_KEYWORD (k_getter, "getter"); - -SCM -scm_ensure_accessor (SCM name) -{ - SCM var, gf; - - var = scm_module_variable (scm_current_module (), name); - if (SCM_VARIABLEP (var) && !SCM_UNBNDP (SCM_VARIABLE_REF (var))) - gf = SCM_VARIABLE_REF (var); - else - gf = SCM_BOOL_F; - - if (!SCM_IS_A_P (gf, scm_class_accessor)) - { - gf = scm_make (scm_list_3 (scm_class_generic, k_name, name)); - gf = scm_make (scm_list_5 (scm_class_accessor, - k_name, name, k_setter, gf)); - } - - return gf; -} - -#ifdef GUILE_DEBUG -/* - * Debugging utilities - */ - -SCM_DEFINE (scm_pure_generic_p, "pure-generic?", 1, 0, 0, - (SCM obj), - "Return @code{#t} if @var{obj} is a pure generic.") -#define FUNC_NAME s_scm_pure_generic_p -{ - return scm_from_bool (SCM_PUREGENERICP (obj)); -} -#undef FUNC_NAME - -#endif /* GUILE_DEBUG */ - -/* - * Initialization - */ - -SCM_DEFINE (scm_sys_goops_loaded, "%goops-loaded", 0, 0, 0, - (), - "Announce that GOOPS is loaded and perform initialization\n" - "on the C level which depends on the loaded GOOPS modules.") -#define FUNC_NAME s_scm_sys_goops_loaded -{ - goops_loaded_p = 1; - var_compute_applicable_methods = - scm_module_variable (scm_module_goops, sym_compute_applicable_methods); - var_slot_unbound = - scm_module_variable (scm_module_goops, sym_slot_unbound); - var_slot_missing = - scm_module_variable (scm_module_goops, sym_slot_missing); - var_compute_cpl = - scm_module_variable (scm_module_goops, sym_compute_cpl); - var_no_applicable_method = - scm_module_variable (scm_module_goops, sym_no_applicable_method); - var_change_class = - scm_module_variable (scm_module_goops, sym_change_class); - setup_extended_primitive_generics (); - return SCM_UNSPECIFIED; -} -#undef FUNC_NAME - -SCM scm_module_goops; - -SCM -scm_init_goops_builtins (void) -{ - scm_module_goops = scm_current_module (); - - goops_rstate = scm_c_make_rstate ("GOOPS", 5); - -#include "libguile/goops.x" - - hell = scm_calloc (hell_size * sizeof (*hell)); - hell_mutex = scm_make_mutex (); - - create_basic_classes (); - create_standard_classes (); - create_smob_classes (); - create_struct_classes (); - create_port_classes (); - - { - SCM name = scm_from_latin1_symbol ("no-applicable-method"); - scm_no_applicable_method = - scm_make (scm_list_3 (scm_class_generic, k_name, name)); - scm_module_define (scm_module_goops, name, scm_no_applicable_method); - } - - return SCM_UNSPECIFIED; -} - -void -scm_init_goops () -{ - scm_c_define_gsubr ("%init-goops-builtins", 0, 0, 0, - scm_init_goops_builtins); -} - -/* - Local Variables: - c-file-style: "gnu" - End: -*/ +/* Copyright (C) 1998,1999,2000,2001,2002,2003,2004,2008,2009,2010,2011,2012,2013,2014,2015 + * Free Software Foundation, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation; either version 3 of + * the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + + +/* This software is a derivative work of other copyrighted softwares; the + * copyright notices of these softwares are placed in the file COPYRIGHTS + * + * This file is based upon stklos.c from the STk distribution by + * Erick Gallesio . + */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include "libguile/_scm.h" +#include "libguile/async.h" +#include "libguile/chars.h" +#include "libguile/dynwind.h" +#include "libguile/eval.h" +#include "libguile/gsubr.h" +#include "libguile/hashtab.h" +#include "libguile/keywords.h" +#include "libguile/macros.h" +#include "libguile/modules.h" +#include "libguile/ports.h" +#include "libguile/procprop.h" +#include "libguile/programs.h" +#include "libguile/smob.h" +#include "libguile/strings.h" +#include "libguile/strports.h" +#include "libguile/vectors.h" + +#include "libguile/validate.h" +#include "libguile/goops.h" + +/* Port classes */ +#define SCM_IN_PCLASS_INDEX 0 +#define SCM_OUT_PCLASS_INDEX SCM_I_MAX_PORT_TYPE_COUNT +#define SCM_INOUT_PCLASS_INDEX (2 * SCM_I_MAX_PORT_TYPE_COUNT) + +#define SCM_GOOPS_UNBOUND SCM_UNBOUND +#define SCM_GOOPS_UNBOUNDP(x) (scm_is_eq (x, SCM_GOOPS_UNBOUND)) + +/* Objects have identity, so references to classes and instances are by + value, not by reference. Redefinition of a class or modification of + an instance causes in-place update; you can think of GOOPS as + building in its own indirection, and for that reason referring to + GOOPS values by variable reference is unnecessary. + + References to ordinary procedures is by reference (by variable), + though, as in the rest of Guile. */ + +SCM_KEYWORD (k_name, "name"); +SCM_KEYWORD (k_setter, "setter"); +SCM_SYMBOL (sym_redefined, "redefined"); +SCM_GLOBAL_SYMBOL (scm_sym_args, "args"); + +static int goops_loaded_p = 0; + +static SCM var_make_standard_class = SCM_BOOL_F; +static SCM var_change_class = SCM_BOOL_F; +static SCM var_make = SCM_BOOL_F; +static SCM var_inherit_applicable = SCM_BOOL_F; +static SCM var_class_name = SCM_BOOL_F; +static SCM var_class_direct_supers = SCM_BOOL_F; +static SCM var_class_direct_slots = SCM_BOOL_F; +static SCM var_class_direct_subclasses = SCM_BOOL_F; +static SCM var_class_direct_methods = SCM_BOOL_F; +static SCM var_class_precedence_list = SCM_BOOL_F; +static SCM var_class_slots = SCM_BOOL_F; + +static SCM var_generic_function_methods = SCM_BOOL_F; +static SCM var_method_generic_function = SCM_BOOL_F; +static SCM var_method_specializers = SCM_BOOL_F; +static SCM var_method_procedure = SCM_BOOL_F; + +static SCM var_slot_ref_using_class = SCM_BOOL_F; +static SCM var_slot_set_using_class_x = SCM_BOOL_F; +static SCM var_slot_bound_using_class_p = SCM_BOOL_F; +static SCM var_slot_exists_using_class_p = SCM_BOOL_F; + +static SCM var_slot_ref = SCM_BOOL_F; +static SCM var_slot_set_x = SCM_BOOL_F; +static SCM var_slot_bound_p = SCM_BOOL_F; +static SCM var_slot_exists_p = SCM_BOOL_F; + +/* These variables are filled in by the object system when loaded. */ +static SCM class_boolean, class_char, class_pair; +static SCM class_procedure, class_string, class_symbol; +static SCM class_primitive_generic; +static SCM class_vector, class_null; +static SCM class_integer, class_real, class_complex, class_fraction; +static SCM class_unknown; +static SCM class_top, class_object, class_class; +static SCM class_applicable; +static SCM class_applicable_struct, class_applicable_struct_with_setter; +static SCM class_generic, class_generic_with_setter; +static SCM class_accessor; +static SCM class_extended_generic, class_extended_generic_with_setter; +static SCM class_extended_accessor; +static SCM class_method; +static SCM class_accessor_method; +static SCM class_procedure_class; +static SCM class_applicable_struct_class; +static SCM class_applicable_struct_with_setter_class; +static SCM class_number, class_list; +static SCM class_keyword; +static SCM class_port, class_input_output_port; +static SCM class_input_port, class_output_port; +static SCM class_foreign_slot; +static SCM class_self, class_protected; +static SCM class_hidden, class_opaque, class_read_only; +static SCM class_protected_hidden, class_protected_opaque, class_protected_read_only; +static SCM class_scm; +static SCM class_int, class_float, class_double; + +static SCM class_foreign; +static SCM class_hashtable; +static SCM class_fluid; +static SCM class_dynamic_state; +static SCM class_frame; +static SCM class_vm_cont; +static SCM class_bytevector; +static SCM class_uvec; +static SCM class_array; +static SCM class_bitvector; + +static SCM vtable_class_map = SCM_BOOL_F; + +/* Port classes. Allocate 3 times the maximum number of port types so that + input ports, output ports, and in/out ports can be stored at different + offsets. See `SCM_IN_PCLASS_INDEX' et al. */ +SCM scm_i_port_class[3 * SCM_I_MAX_PORT_TYPE_COUNT]; + +/* SMOB classes. */ +SCM scm_i_smob_class[SCM_I_MAX_SMOB_TYPE_COUNT]; + +SCM scm_module_goops; + +static SCM scm_make_unbound (void); +static SCM scm_unbound_p (SCM obj); +static SCM scm_class_p (SCM obj); +static SCM scm_sys_bless_applicable_struct_vtables_x (SCM applicable, + SCM setter); +static SCM scm_sys_make_root_class (SCM layout); +static SCM scm_sys_init_layout_x (SCM class, SCM layout); +static SCM scm_sys_clear_fields_x (SCM obj); +static SCM scm_sys_goops_early_init (void); +static SCM scm_sys_goops_loaded (void); + + + + +SCM_DEFINE (scm_sys_make_root_class, "%make-root-class", 1, 0, 0, + (SCM layout), + "") +#define FUNC_NAME s_scm_sys_make_root_class +{ + SCM z; + + z = scm_i_make_vtable_vtable (layout); + SCM_SET_CLASS_FLAGS (z, (SCM_CLASSF_GOOPS_OR_VALID | SCM_CLASSF_METACLASS)); + + return z; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_sys_bless_applicable_struct_vtables_x, "%bless-applicable-struct-vtables!", 2, 0, 0, + (SCM applicable, SCM setter), + "") +#define FUNC_NAME s_scm_sys_bless_applicable_struct_vtables_x +{ + SCM_VALIDATE_CLASS (1, applicable); + SCM_VALIDATE_CLASS (2, setter); + SCM_SET_VTABLE_FLAGS (applicable, SCM_VTABLE_FLAG_APPLICABLE_VTABLE); + SCM_SET_VTABLE_FLAGS (setter, SCM_VTABLE_FLAG_SETTER_VTABLE); + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM +scm_make_standard_class (SCM meta, SCM name, SCM dsupers, SCM dslots) +{ + return scm_call_4 (scm_variable_ref (var_make_standard_class), + meta, name, dsupers, dslots); +} + +SCM_DEFINE (scm_sys_init_layout_x, "%init-layout!", 2, 0, 0, + (SCM class, SCM layout), + "") +#define FUNC_NAME s_scm_sys_init_layout_x +{ + SCM_VALIDATE_INSTANCE (1, class); + SCM_ASSERT (!scm_is_symbol (SCM_VTABLE_LAYOUT (class)), class, 1, FUNC_NAME); + SCM_VALIDATE_STRING (2, layout); + + SCM_SET_VTABLE_LAYOUT (class, scm_make_struct_layout (layout)); + scm_i_struct_inherit_vtable_magic (SCM_CLASS_OF (class), class); + SCM_SET_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_OR_VALID); + + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + + + + +/* This function is used for efficient type dispatch. */ +SCM_DEFINE (scm_class_of, "class-of", 1, 0, 0, + (SCM x), + "Return the class of @var{x}.") +#define FUNC_NAME s_scm_class_of +{ + switch (SCM_ITAG3 (x)) + { + case scm_tc3_int_1: + case scm_tc3_int_2: + return class_integer; + + case scm_tc3_imm24: + if (SCM_CHARP (x)) + return class_char; + else if (scm_is_bool (x)) + return class_boolean; + else if (scm_is_null (x)) + return class_null; + else + return class_unknown; + + case scm_tc3_cons: + switch (SCM_TYP7 (x)) + { + case scm_tcs_cons_nimcar: + return class_pair; + case scm_tc7_symbol: + return class_symbol; + case scm_tc7_vector: + case scm_tc7_wvect: + return class_vector; + case scm_tc7_pointer: + return class_foreign; + case scm_tc7_hashtable: + return class_hashtable; + case scm_tc7_fluid: + return class_fluid; + case scm_tc7_dynamic_state: + return class_dynamic_state; + case scm_tc7_frame: + return class_frame; + case scm_tc7_keyword: + return class_keyword; + case scm_tc7_vm_cont: + return class_vm_cont; + case scm_tc7_bytevector: + if (SCM_BYTEVECTOR_ELEMENT_TYPE (x) == SCM_ARRAY_ELEMENT_TYPE_VU8) + return class_bytevector; + else + return class_uvec; + case scm_tc7_array: + return class_array; + case scm_tc7_bitvector: + return class_bitvector; + case scm_tc7_string: + return class_string; + case scm_tc7_number: + switch SCM_TYP16 (x) { + case scm_tc16_big: + return class_integer; + case scm_tc16_real: + return class_real; + case scm_tc16_complex: + return class_complex; + case scm_tc16_fraction: + return class_fraction; + } + case scm_tc7_program: + if (SCM_PROGRAM_IS_PRIMITIVE_GENERIC (x) + && SCM_UNPACK (*SCM_SUBR_GENERIC (x))) + return class_primitive_generic; + else + return class_procedure; + + case scm_tc7_smob: + { + scm_t_bits type = SCM_TYP16 (x); + if (type != scm_tc16_port_with_ps) + return scm_i_smob_class[SCM_TC2SMOBNUM (type)]; + x = SCM_PORT_WITH_PS_PORT (x); + /* fall through to ports */ + } + case scm_tc7_port: + return scm_i_port_class[(SCM_WRTNG & SCM_CELL_WORD_0 (x) + ? (SCM_RDNG & SCM_CELL_WORD_0 (x) + ? SCM_INOUT_PCLASS_INDEX | SCM_PTOBNUM (x) + : SCM_OUT_PCLASS_INDEX | SCM_PTOBNUM (x)) + : SCM_IN_PCLASS_INDEX | SCM_PTOBNUM (x))]; + case scm_tcs_struct: + if (SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_GOOPS_VALID) + /* A GOOPS object with a valid class. */ + return SCM_CLASS_OF (x); + else if (SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_GOOPS) + /* A GOOPS object whose class might have been redefined. */ + { + SCM class = SCM_CLASS_OF (x); + SCM new_class = scm_slot_ref (class, sym_redefined); + if (!scm_is_false (new_class)) + scm_change_object_class (x, class, new_class); + /* Re-load class from instance. */ + return SCM_CLASS_OF (x); + } + else + return scm_i_define_class_for_vtable (SCM_CLASS_OF (x)); + default: + if (scm_is_pair (x)) + return class_pair; + else + return class_unknown; + } + + case scm_tc3_struct: + case scm_tc3_tc7_1: + case scm_tc3_tc7_2: + /* case scm_tc3_unused: */ + /* Never reached */ + break; + } + return class_unknown; +} +#undef FUNC_NAME + + + + +SCM_DEFINE (scm_instance_p, "instance?", 1, 0, 0, + (SCM obj), + "Return @code{#t} if @var{obj} is an instance.") +#define FUNC_NAME s_scm_instance_p +{ + return scm_from_bool (SCM_INSTANCEP (obj)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_class_p, "class?", 1, 0, 0, + (SCM obj), + "Return @code{#t} if @var{obj} is a class.") +#define FUNC_NAME s_scm_class_p +{ + return scm_from_bool (SCM_CLASSP (obj)); +} +#undef FUNC_NAME + +int +scm_is_generic (SCM x) +{ + return SCM_INSTANCEP (x) && SCM_SUBCLASSP (SCM_CLASS_OF (x), class_generic); +} + +int +scm_is_method (SCM x) +{ + return SCM_INSTANCEP (x) && SCM_SUBCLASSP (SCM_CLASS_OF (x), class_method); +} + + + + +SCM +scm_class_name (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_class_name), obj); +} + +SCM +scm_class_direct_supers (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_class_direct_supers), obj); +} + +SCM +scm_class_direct_slots (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_class_direct_slots), obj); +} + +SCM +scm_class_direct_subclasses (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_class_direct_subclasses), obj); +} + +SCM +scm_class_direct_methods (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_class_direct_methods), obj); +} + +SCM +scm_class_precedence_list (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_class_precedence_list), obj); +} + +SCM +scm_class_slots (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_class_slots), obj); +} + + + + +SCM_DEFINE (scm_generic_function_name, "generic-function-name", 1, 0, 0, + (SCM obj), + "Return the name of the generic function @var{obj}.") +#define FUNC_NAME s_scm_generic_function_name +{ + SCM_VALIDATE_GENERIC (1, obj); + return scm_procedure_property (obj, scm_sym_name); +} +#undef FUNC_NAME + +SCM +scm_generic_function_methods (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_generic_function_methods), obj); +} + +SCM +scm_method_generic_function (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_method_generic_function), obj); +} + +SCM +scm_method_specializers (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_method_specializers), obj); +} + +SCM +scm_method_procedure (SCM obj) +{ + return scm_call_1 (scm_variable_ref (var_method_procedure), obj); +} + + + + +SCM_DEFINE (scm_make_unbound, "make-unbound", 0, 0, 0, + (), + "Return the unbound value.") +#define FUNC_NAME s_scm_make_unbound +{ + return SCM_GOOPS_UNBOUND; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_unbound_p, "unbound?", 1, 0, 0, + (SCM obj), + "Return @code{#t} if @var{obj} is unbound.") +#define FUNC_NAME s_scm_unbound_p +{ + return SCM_GOOPS_UNBOUNDP (obj) ? SCM_BOOL_T : SCM_BOOL_F; +} +#undef FUNC_NAME + + + + +SCM +scm_slot_ref_using_class (SCM class, SCM obj, SCM slot_name) +{ + return scm_call_3 (scm_variable_ref (var_slot_ref_using_class), + class, obj, slot_name); +} + +SCM +scm_slot_set_using_class_x (SCM class, SCM obj, SCM slot_name, SCM value) +{ + return scm_call_4 (scm_variable_ref (var_slot_set_using_class_x), + class, obj, slot_name, value); +} + +SCM +scm_slot_bound_using_class_p (SCM class, SCM obj, SCM slot_name) +{ + return scm_call_3 (scm_variable_ref (var_slot_bound_using_class_p), + class, obj, slot_name); +} + +SCM +scm_slot_exists_using_class_p (SCM class, SCM obj, SCM slot_name) +{ + return scm_call_3 (scm_variable_ref (var_slot_exists_using_class_p), + class, obj, slot_name); +} + +SCM +scm_slot_ref (SCM obj, SCM slot_name) +{ + return scm_call_2 (scm_variable_ref (var_slot_ref), obj, slot_name); +} + +SCM +scm_slot_set_x (SCM obj, SCM slot_name, SCM value) +{ + return scm_call_3 (scm_variable_ref (var_slot_set_x), obj, slot_name, value); +} + +SCM +scm_slot_bound_p (SCM obj, SCM slot_name) +{ + return scm_call_2 (scm_variable_ref (var_slot_bound_p), obj, slot_name); +} + +SCM +scm_slot_exists_p (SCM obj, SCM slot_name) +{ + return scm_call_2 (scm_variable_ref (var_slot_exists_p), obj, slot_name); +} + + + + +SCM_DEFINE (scm_sys_clear_fields_x, "%clear-fields!", 1, 0, 0, + (SCM obj), + "") +#define FUNC_NAME s_scm_sys_clear_fields_x +{ + scm_t_signed_bits n, i; + SCM vtable, layout; + + SCM_VALIDATE_STRUCT (1, obj); + vtable = SCM_STRUCT_VTABLE (obj); + + n = SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size); + layout = SCM_VTABLE_LAYOUT (vtable); + + /* Set all SCM-holding slots to the GOOPS unbound value. */ + for (i = 0; i < n; i++) + if (scm_i_symbol_ref (layout, i*2) == 'p') + SCM_STRUCT_SLOT_SET (obj, i, SCM_GOOPS_UNBOUND); + + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + + + + +SCM_DEFINE (scm_sys_modify_instance, "%modify-instance", 2, 0, 0, + (SCM old, SCM new), + "Used by change-class to modify objects in place.") +#define FUNC_NAME s_scm_sys_modify_instance +{ + SCM_VALIDATE_INSTANCE (1, old); + SCM_VALIDATE_INSTANCE (2, new); + + /* Exchange the data contained in old and new. We exchange rather than + * scratch the old value with new to be correct with GC. + * See "Class redefinition protocol above". + */ + SCM_CRITICAL_SECTION_START; + { + scm_t_bits word0, word1; + word0 = SCM_CELL_WORD_0 (old); + word1 = SCM_CELL_WORD_1 (old); + SCM_SET_CELL_WORD_0 (old, SCM_CELL_WORD_0 (new)); + SCM_SET_CELL_WORD_1 (old, SCM_CELL_WORD_1 (new)); + SCM_SET_CELL_WORD_0 (new, word0); + SCM_SET_CELL_WORD_1 (new, word1); + } + SCM_CRITICAL_SECTION_END; + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_sys_modify_class, "%modify-class", 2, 0, 0, + (SCM old, SCM new), + "") +#define FUNC_NAME s_scm_sys_modify_class +{ + SCM_VALIDATE_CLASS (1, old); + SCM_VALIDATE_CLASS (2, new); + + SCM_CRITICAL_SECTION_START; + { + scm_t_bits word0, word1; + word0 = SCM_CELL_WORD_0 (old); + word1 = SCM_CELL_WORD_1 (old); + SCM_SET_CELL_WORD_0 (old, SCM_CELL_WORD_0 (new)); + SCM_SET_CELL_WORD_1 (old, SCM_CELL_WORD_1 (new)); + SCM_STRUCT_DATA (old)[scm_vtable_index_self] = SCM_UNPACK (old); + SCM_SET_CELL_WORD_0 (new, word0); + SCM_SET_CELL_WORD_1 (new, word1); + SCM_STRUCT_DATA (new)[scm_vtable_index_self] = SCM_UNPACK (new); + } + SCM_CRITICAL_SECTION_END; + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_sys_invalidate_class, "%invalidate-class", 1, 0, 0, + (SCM class), + "") +#define FUNC_NAME s_scm_sys_invalidate_class +{ + SCM_VALIDATE_CLASS (1, class); + SCM_CLEAR_CLASS_FLAGS (class, SCM_CLASSF_GOOPS_VALID); + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +/* When instances change class, they finally get a new body, but + * before that, they go through purgatory in hell. Odd as it may + * seem, this data structure saves us from eternal suffering in + * infinite recursions. + */ + +static scm_t_bits **hell; +static long n_hell = 1; /* one place for the evil one himself */ +static long hell_size = 4; +static SCM hell_mutex; + +static long +burnin (SCM o) +{ + long i; + for (i = 1; i < n_hell; ++i) + if (SCM_STRUCT_DATA (o) == hell[i]) + return i; + return 0; +} + +static void +go_to_hell (void *o) +{ + SCM obj = *(SCM*)o; + scm_lock_mutex (hell_mutex); + if (n_hell >= hell_size) + { + hell_size *= 2; + hell = scm_realloc (hell, hell_size * sizeof(*hell)); + } + hell[n_hell++] = SCM_STRUCT_DATA (obj); + scm_unlock_mutex (hell_mutex); +} + +static void +go_to_heaven (void *o) +{ + SCM obj = *(SCM*)o; + scm_lock_mutex (hell_mutex); + hell[burnin (obj)] = hell[--n_hell]; + scm_unlock_mutex (hell_mutex); +} + + +static SCM +purgatory (SCM obj, SCM new_class) +{ + return scm_call_2 (SCM_VARIABLE_REF (var_change_class), obj, new_class); +} + +/* This function calls the generic function change-class for all + * instances which aren't currently undergoing class change. + */ + +void +scm_change_object_class (SCM obj, SCM old_class SCM_UNUSED, SCM new_class) +{ + if (!burnin (obj)) + { + scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE); + scm_dynwind_rewind_handler (go_to_hell, &obj, SCM_F_WIND_EXPLICITLY); + scm_dynwind_unwind_handler (go_to_heaven, &obj, SCM_F_WIND_EXPLICITLY); + purgatory (obj, new_class); + scm_dynwind_end (); + } +} + + + + +/* Primitive generics: primitives that can dispatch to generics if their + arguments fail to apply. */ + +SCM_DEFINE (scm_generic_capability_p, "generic-capability?", 1, 0, 0, + (SCM proc), + "") +#define FUNC_NAME s_scm_generic_capability_p +{ + SCM_ASSERT (scm_is_true (scm_procedure_p (proc)), + proc, SCM_ARG1, FUNC_NAME); + return (SCM_PRIMITIVE_GENERIC_P (proc) ? SCM_BOOL_T : SCM_BOOL_F); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_enable_primitive_generic_x, "enable-primitive-generic!", 0, 0, 1, + (SCM subrs), + "") +#define FUNC_NAME s_scm_enable_primitive_generic_x +{ + SCM_VALIDATE_REST_ARGUMENT (subrs); + while (!scm_is_null (subrs)) + { + SCM subr = SCM_CAR (subrs); + SCM_ASSERT (SCM_PRIMITIVE_GENERIC_P (subr), subr, SCM_ARGn, FUNC_NAME); + SCM_SET_SUBR_GENERIC (subr, + scm_make (scm_list_3 (class_generic, + k_name, + SCM_SUBR_NAME (subr)))); + subrs = SCM_CDR (subrs); + } + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_set_primitive_generic_x, "set-primitive-generic!", 2, 0, 0, + (SCM subr, SCM generic), + "") +#define FUNC_NAME s_scm_set_primitive_generic_x +{ + SCM_ASSERT (SCM_PRIMITIVE_GENERIC_P (subr), subr, SCM_ARG1, FUNC_NAME); + SCM_ASSERT (SCM_GENERICP (generic), generic, SCM_ARG2, FUNC_NAME); + SCM_SET_SUBR_GENERIC (subr, generic); + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_primitive_generic_generic, "primitive-generic-generic", 1, 0, 0, + (SCM subr), + "") +#define FUNC_NAME s_scm_primitive_generic_generic +{ + if (SCM_PRIMITIVE_GENERIC_P (subr)) + { + if (!SCM_UNPACK (*SCM_SUBR_GENERIC (subr))) + scm_enable_primitive_generic_x (scm_list_1 (subr)); + return *SCM_SUBR_GENERIC (subr); + } + SCM_WRONG_TYPE_ARG (SCM_ARG1, subr); +} +#undef FUNC_NAME + +SCM +scm_wta_dispatch_0 (SCM gf, const char *subr) +{ + if (!SCM_UNPACK (gf)) + scm_error_num_args_subr (subr); + + return scm_call_0 (gf); +} + +SCM +scm_wta_dispatch_1 (SCM gf, SCM a1, int pos, const char *subr) +{ + if (!SCM_UNPACK (gf)) + scm_wrong_type_arg (subr, pos, a1); + + return scm_call_1 (gf, a1); +} + +SCM +scm_wta_dispatch_2 (SCM gf, SCM a1, SCM a2, int pos, const char *subr) +{ + if (!SCM_UNPACK (gf)) + scm_wrong_type_arg (subr, pos, (pos == SCM_ARG1) ? a1 : a2); + + return scm_call_2 (gf, a1, a2); +} + +SCM +scm_wta_dispatch_n (SCM gf, SCM args, int pos, const char *subr) +{ + if (!SCM_UNPACK (gf)) + scm_wrong_type_arg (subr, pos, scm_list_ref (args, scm_from_int (pos))); + + return scm_apply_0 (gf, args); +} + + + + +SCM_DEFINE (scm_make, "make", 0, 0, 1, + (SCM args), + "Make a new object. @var{args} must contain the class and\n" + "all necessary initialization information.") +#define FUNC_NAME s_scm_make +{ + return scm_apply_0 (scm_variable_ref (var_make), args); +} +#undef FUNC_NAME + + + + +/* SMOB, struct, and port classes. */ + +static SCM +make_class_name (const char *prefix, const char *type_name, const char *suffix) +{ + if (!type_name) + type_name = ""; + return scm_string_to_symbol (scm_string_append + (scm_list_3 (scm_from_utf8_string (prefix), + scm_from_utf8_string (type_name), + scm_from_utf8_string (suffix)))); +} + +SCM +scm_make_extended_class (char const *type_name, int applicablep) +{ + SCM name, meta, supers; + + name = make_class_name ("<", type_name, ">"); + meta = class_class; + + if (applicablep) + supers = scm_list_1 (class_applicable); + else + supers = scm_list_1 (class_top); + + return scm_make_standard_class (meta, name, supers, SCM_EOL); +} + +void +scm_i_inherit_applicable (SCM c) +{ + scm_call_1 (scm_variable_ref (var_inherit_applicable), c); +} + +static void +create_smob_classes (void) +{ + long i; + + for (i = 0; i < SCM_I_MAX_SMOB_TYPE_COUNT; ++i) + scm_i_smob_class[i] = SCM_BOOL_F; + + for (i = 0; i < scm_numsmob; ++i) + if (scm_is_false (scm_i_smob_class[i])) + scm_i_smob_class[i] = scm_make_extended_class (SCM_SMOBNAME (i), + scm_smobs[i].apply != 0); +} + +void +scm_make_port_classes (long ptobnum, char *type_name) +{ + SCM name, meta, super, supers; + + meta = class_class; + + name = make_class_name ("<", type_name, "-port>"); + supers = scm_list_1 (class_port); + super = scm_make_standard_class (meta, name, supers, SCM_EOL); + + name = make_class_name ("<", type_name, "-input-port>"); + supers = scm_list_2 (super, class_input_port); + scm_i_port_class[SCM_IN_PCLASS_INDEX + ptobnum] + = scm_make_standard_class (meta, name, supers, SCM_EOL); + + name = make_class_name ("<", type_name, "-output-port>"); + supers = scm_list_2 (super, class_output_port); + scm_i_port_class[SCM_OUT_PCLASS_INDEX + ptobnum] + = scm_make_standard_class (meta, name, supers, SCM_EOL); + + name = make_class_name ("<", type_name, "-input-output-port>"); + supers = scm_list_2 (super, class_input_output_port); + scm_i_port_class[SCM_INOUT_PCLASS_INDEX + ptobnum] + = scm_make_standard_class (meta, name, supers, SCM_EOL); +} + +static void +create_port_classes (void) +{ + long i; + + for (i = scm_c_num_port_types () - 1; i >= 0; i--) + scm_make_port_classes (i, SCM_PTOBNAME (i)); +} + +SCM +scm_i_define_class_for_vtable (SCM vtable) +{ + SCM class; + + scm_i_pthread_mutex_lock (&scm_i_misc_mutex); + if (scm_is_false (vtable_class_map)) + vtable_class_map = scm_c_make_weak_table (0, SCM_WEAK_TABLE_KIND_KEY); + scm_i_pthread_mutex_unlock (&scm_i_misc_mutex); + + if (scm_is_false (scm_struct_vtable_p (vtable))) + abort (); + + class = scm_weak_table_refq (vtable_class_map, vtable, SCM_BOOL_F); + + if (scm_is_false (class)) + { + if (SCM_UNPACK (class_class)) + { + SCM name, meta, supers; + + name = SCM_VTABLE_NAME (vtable); + if (scm_is_symbol (name)) + name = scm_string_to_symbol + (scm_string_append + (scm_list_3 (scm_from_latin1_string ("<"), + scm_symbol_to_string (name), + scm_from_latin1_string (">")))); + else + name = scm_from_latin1_symbol ("<>"); + + if (SCM_STRUCT_VTABLE_FLAG_IS_SET (vtable, SCM_VTABLE_FLAG_SETTER)) + { + meta = class_applicable_struct_with_setter_class; + supers = scm_list_1 (class_applicable_struct_with_setter); + } + else if (SCM_STRUCT_VTABLE_FLAG_IS_SET (vtable, + SCM_VTABLE_FLAG_APPLICABLE)) + { + meta = class_applicable_struct_class; + supers = scm_list_1 (class_applicable_struct); + } + else + { + meta = class_class; + supers = scm_list_1 (class_top); + } + + return scm_make_standard_class (meta, name, supers, SCM_EOL); + } + else + /* `create_struct_classes' will fill this in later. */ + class = SCM_BOOL_F; + + /* Don't worry about races. This only happens when creating a + vtable, which happens by definition in one thread. */ + scm_weak_table_putq_x (vtable_class_map, vtable, class); + } + + return class; +} + +static SCM +make_struct_class (void *closure SCM_UNUSED, + SCM vtable, SCM data, SCM prev SCM_UNUSED) +{ + if (scm_is_false (data)) + scm_i_define_class_for_vtable (vtable); + return SCM_UNSPECIFIED; +} + +static void +create_struct_classes (void) +{ + /* FIXME: take the vtable_class_map while initializing goops? */ + scm_internal_hash_fold (make_struct_class, 0, SCM_BOOL_F, + vtable_class_map); +} + + + + +void +scm_load_goops () +{ + if (!goops_loaded_p) + scm_c_resolve_module ("oop goops"); +} + +SCM +scm_ensure_accessor (SCM name) +{ + SCM var, gf; + + var = scm_module_variable (scm_current_module (), name); + if (SCM_VARIABLEP (var) && !SCM_UNBNDP (SCM_VARIABLE_REF (var))) + gf = SCM_VARIABLE_REF (var); + else + gf = SCM_BOOL_F; + + if (!SCM_IS_A_P (gf, class_accessor)) + { + gf = scm_make (scm_list_3 (class_generic, k_name, name)); + gf = scm_make (scm_list_5 (class_accessor, + k_name, name, k_setter, gf)); + } + + return gf; +} + + + + +SCM_DEFINE (scm_sys_goops_early_init, "%goops-early-init", 0, 0, 0, + (), + "") +#define FUNC_NAME s_scm_sys_goops_early_init +{ + var_make_standard_class = scm_c_lookup ("make-standard-class"); + var_make = scm_c_lookup ("make"); + var_inherit_applicable = scm_c_lookup ("inherit-applicable!"); + + /* For SCM_SUBCLASSP. */ + var_class_precedence_list = scm_c_lookup ("class-precedence-list"); + + var_slot_ref_using_class = scm_c_lookup ("slot-ref-using-class"); + var_slot_set_using_class_x = scm_c_lookup ("slot-set-using-class!"); + var_slot_bound_using_class_p = scm_c_lookup ("slot-bound-using-class?"); + var_slot_exists_using_class_p = scm_c_lookup ("slot-exists-using-class?"); + + var_slot_ref = scm_c_lookup ("slot-ref"); + var_slot_set_x = scm_c_lookup ("slot-set!"); + var_slot_bound_p = scm_c_lookup ("slot-bound?"); + var_slot_exists_p = scm_c_lookup ("slot-exists?"); + + class_class = scm_variable_ref (scm_c_lookup ("")); + class_top = scm_variable_ref (scm_c_lookup ("")); + class_object = scm_variable_ref (scm_c_lookup ("")); + + class_foreign_slot = scm_variable_ref (scm_c_lookup ("")); + class_protected = scm_variable_ref (scm_c_lookup ("")); + class_hidden = scm_variable_ref (scm_c_lookup ("")); + class_opaque = scm_variable_ref (scm_c_lookup ("")); + class_read_only = scm_variable_ref (scm_c_lookup ("")); + class_self = scm_variable_ref (scm_c_lookup ("")); + class_protected_opaque = scm_variable_ref (scm_c_lookup ("")); + class_protected_hidden = scm_variable_ref (scm_c_lookup ("")); + class_protected_read_only = scm_variable_ref (scm_c_lookup ("")); + class_scm = scm_variable_ref (scm_c_lookup ("")); + class_int = scm_variable_ref (scm_c_lookup ("")); + class_float = scm_variable_ref (scm_c_lookup ("")); + class_double = scm_variable_ref (scm_c_lookup ("")); + + /* Applicables */ + class_procedure_class = scm_variable_ref (scm_c_lookup ("")); + class_applicable_struct_class = scm_variable_ref (scm_c_lookup ("")); + class_applicable_struct_with_setter_class = + scm_variable_ref (scm_c_lookup ("")); + + class_method = scm_variable_ref (scm_c_lookup ("")); + class_accessor_method = scm_variable_ref (scm_c_lookup ("")); + class_applicable = scm_variable_ref (scm_c_lookup ("")); + class_applicable_struct = scm_variable_ref (scm_c_lookup ("")); + class_applicable_struct_with_setter = scm_variable_ref (scm_c_lookup ("")); + class_generic = scm_variable_ref (scm_c_lookup ("")); + class_extended_generic = scm_variable_ref (scm_c_lookup ("")); + class_generic_with_setter = scm_variable_ref (scm_c_lookup ("")); + class_accessor = scm_variable_ref (scm_c_lookup ("")); + class_extended_generic_with_setter = scm_variable_ref (scm_c_lookup ("")); + class_extended_accessor = scm_variable_ref (scm_c_lookup ("")); + + /* Primitive types classes */ + class_boolean = scm_variable_ref (scm_c_lookup ("")); + class_char = scm_variable_ref (scm_c_lookup ("")); + class_list = scm_variable_ref (scm_c_lookup ("")); + class_pair = scm_variable_ref (scm_c_lookup ("")); + class_null = scm_variable_ref (scm_c_lookup ("")); + class_string = scm_variable_ref (scm_c_lookup ("")); + class_symbol = scm_variable_ref (scm_c_lookup ("")); + class_vector = scm_variable_ref (scm_c_lookup ("")); + class_foreign = scm_variable_ref (scm_c_lookup ("")); + class_hashtable = scm_variable_ref (scm_c_lookup ("")); + class_fluid = scm_variable_ref (scm_c_lookup ("")); + class_dynamic_state = scm_variable_ref (scm_c_lookup ("")); + class_frame = scm_variable_ref (scm_c_lookup ("")); + class_vm_cont = scm_variable_ref (scm_c_lookup ("")); + class_bytevector = scm_variable_ref (scm_c_lookup ("")); + class_uvec = scm_variable_ref (scm_c_lookup ("")); + class_array = scm_variable_ref (scm_c_lookup ("")); + class_bitvector = scm_variable_ref (scm_c_lookup ("")); + class_number = scm_variable_ref (scm_c_lookup ("")); + class_complex = scm_variable_ref (scm_c_lookup ("")); + class_real = scm_variable_ref (scm_c_lookup ("")); + class_integer = scm_variable_ref (scm_c_lookup ("")); + class_fraction = scm_variable_ref (scm_c_lookup ("")); + class_keyword = scm_variable_ref (scm_c_lookup ("")); + class_unknown = scm_variable_ref (scm_c_lookup ("")); + class_procedure = scm_variable_ref (scm_c_lookup ("")); + class_primitive_generic = scm_variable_ref (scm_c_lookup ("")); + class_port = scm_variable_ref (scm_c_lookup ("")); + class_input_port = scm_variable_ref (scm_c_lookup ("")); + class_output_port = scm_variable_ref (scm_c_lookup ("")); + class_input_output_port = scm_variable_ref (scm_c_lookup ("")); + + create_smob_classes (); + create_struct_classes (); + create_port_classes (); + + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +SCM_DEFINE (scm_sys_goops_loaded, "%goops-loaded", 0, 0, 0, + (), + "Announce that GOOPS is loaded and perform initialization\n" + "on the C level which depends on the loaded GOOPS modules.") +#define FUNC_NAME s_scm_sys_goops_loaded +{ + goops_loaded_p = 1; + var_class_name = scm_c_lookup ("class-name"); + var_class_direct_supers = scm_c_lookup ("class-direct-supers"); + var_class_direct_slots = scm_c_lookup ("class-direct-slots"); + var_class_direct_subclasses = scm_c_lookup ("class-direct-subclasses"); + var_class_direct_methods = scm_c_lookup ("class-direct-methods"); + var_class_slots = scm_c_lookup ("class-slots"); + + var_generic_function_methods = scm_c_lookup ("generic-function-methods"); + var_method_generic_function = scm_c_lookup ("method-generic-function"); + var_method_specializers = scm_c_lookup ("method-specializers"); + var_method_procedure = scm_c_lookup ("method-procedure"); + + var_change_class = scm_c_lookup ("change-class"); + +#if (SCM_ENABLE_DEPRECATED == 1) + scm_init_deprecated_goops (); +#endif + + return SCM_UNSPECIFIED; +} +#undef FUNC_NAME + +static void +scm_init_goops_builtins (void *unused) +{ + scm_module_goops = scm_current_module (); + + hell = scm_calloc (hell_size * sizeof (*hell)); + hell_mutex = scm_make_mutex (); + +#include "libguile/goops.x" +} + +void +scm_init_goops () +{ + scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, + "scm_init_goops_builtins", scm_init_goops_builtins, + NULL); +} + +/* + Local Variables: + c-file-style: "gnu" + End: +*/