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510ca12687
* libguile/vm-engine.c (rtl_vm_engine): Add new VM. (vm_engine): Add support for calling RTL programs. * libguile/tags.h (scm_tc7_rtl_program): New type for procedures that run on the new VM. * libguile/evalext.c (scm_self_evaluating_p): * libguile/goops.c (scm_class_of): * libguile/print.c (iprin1): * libguile/procprop.c (scm_i_procedure_arity): * libguile/procs.c (scm_procedure_p): Add hooks for the new tc7. * libguile/programs.h: * libguile/programs.c (scm_make_rtl_program, scm_i_rtl_program_print) (scm_rtl_program_p, scm_rtl_program_code): * module/system/vm/program.scm: Add constructors and accessors for the new "RTL programs". * libguile/vm.c (rtl_boot_continuation): Define a boot program. (rtl_apply, rtl_values): New static RTL programs. * libguile/frames.c (scm_frame_num_locals): Adapt for frames of RTL programs. * libguile/frames.h: Add description of RTL frames. * libguile/Makefile.am: Add rules to generate vm-operations.h. * .gitignore: Ignore vm-operations.h. * module/system/vm/instruction.scm: * libguile/instructions.c: * libguile/instructions.h: Use vm-operations.h to define enumerated values for the new RTL opcodes. Define some helper macros to pack and unpack 32-bit instruction words. (rtl-instruction-list): New function, exported by (system vm instruction). * libguile/objcodes.c: Wire up the bits needed to detect the new RTL bytecode and load it, as appropriate.
2859 lines
84 KiB
C
2859 lines
84 KiB
C
/* Copyright (C) 1998,1999,2000,2001,2002,2003,2004,2008,2009,2010,2011,2012
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* Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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/* This software is a derivative work of other copyrighted softwares; the
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* copyright notices of these softwares are placed in the file COPYRIGHTS
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*
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* This file is based upon stklos.c from the STk distribution by
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* Erick Gallesio <eg@unice.fr>.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include "libguile/_scm.h"
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#include "libguile/alist.h"
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#include "libguile/async.h"
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#include "libguile/chars.h"
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#include "libguile/debug.h"
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#include "libguile/dynl.h"
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#include "libguile/dynwind.h"
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#include "libguile/eval.h"
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#include "libguile/gsubr.h"
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#include "libguile/hashtab.h"
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#include "libguile/keywords.h"
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#include "libguile/macros.h"
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#include "libguile/modules.h"
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#include "libguile/ports.h"
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#include "libguile/procprop.h"
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#include "libguile/programs.h"
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#include "libguile/random.h"
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#include "libguile/root.h"
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#include "libguile/smob.h"
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#include "libguile/strings.h"
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#include "libguile/strports.h"
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#include "libguile/vectors.h"
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#include "libguile/vm.h"
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#include "libguile/validate.h"
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#include "libguile/goops.h"
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#define SPEC_OF(x) SCM_SLOT (x, scm_si_specializers)
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/* Port classes */
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#define SCM_IN_PCLASS_INDEX 0
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#define SCM_OUT_PCLASS_INDEX SCM_I_MAX_PORT_TYPE_COUNT
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#define SCM_INOUT_PCLASS_INDEX (2 * SCM_I_MAX_PORT_TYPE_COUNT)
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/* this file is a mess. in theory, though, we shouldn't have many SCM references
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-- most of the references should be to vars. */
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static SCM var_slot_unbound = SCM_BOOL_F;
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static SCM var_slot_missing = SCM_BOOL_F;
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static SCM var_compute_cpl = SCM_BOOL_F;
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static SCM var_no_applicable_method = SCM_BOOL_F;
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static SCM var_change_class = SCM_BOOL_F;
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SCM_SYMBOL (sym_slot_unbound, "slot-unbound");
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SCM_SYMBOL (sym_slot_missing, "slot-missing");
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SCM_SYMBOL (sym_compute_cpl, "compute-cpl");
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SCM_SYMBOL (sym_no_applicable_method, "no-applicable-method");
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SCM_SYMBOL (sym_memoize_method_x, "memoize-method!");
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SCM_SYMBOL (sym_change_class, "change-class");
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SCM_VARIABLE (scm_var_make_extended_generic, "make-extended-generic");
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/* Class redefinition protocol:
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A class is represented by a heap header h1 which points to a
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malloc:ed memory block m1.
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When a new version of a class is created, a new header h2 and
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memory block m2 are allocated. The headers h1 and h2 then switch
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pointers so that h1 refers to m2 and h2 to m1. In this way, names
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bound to h1 will point to the new class at the same time as h2 will
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be a handle which the GC will use to free m1.
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The `redefined' slot of m1 will be set to point to h1. An old
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instance will have its class pointer (the CAR of the heap header)
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pointing to m1. The non-immediate `redefined'-slot in m1 indicates
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the class modification and the new class pointer can be found via
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h1.
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*/
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#define TEST_CHANGE_CLASS(obj, class) \
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{ \
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class = SCM_CLASS_OF (obj); \
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if (scm_is_true (SCM_OBJ_CLASS_REDEF (obj))) \
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{ \
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scm_change_object_class (obj, class, SCM_OBJ_CLASS_REDEF (obj));\
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class = SCM_CLASS_OF (obj); \
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} \
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}
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#define NXT_MTHD_METHODS(m) (SCM_VELTS (m)[1])
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#define NXT_MTHD_ARGS(m) (SCM_VELTS (m)[2])
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#define SCM_GOOPS_UNBOUND SCM_UNBOUND
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#define SCM_GOOPS_UNBOUNDP(x) (scm_is_eq (x, SCM_GOOPS_UNBOUND))
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static int goops_loaded_p = 0;
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static scm_t_rstate *goops_rstate;
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/* These variables are filled in by the object system when loaded. */
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SCM scm_class_boolean, scm_class_char, scm_class_pair;
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SCM scm_class_procedure, scm_class_string, scm_class_symbol;
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SCM scm_class_primitive_generic;
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SCM scm_class_vector, scm_class_null;
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SCM scm_class_integer, scm_class_real, scm_class_complex, scm_class_fraction;
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SCM scm_class_unknown;
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SCM scm_class_top, scm_class_object, scm_class_class;
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SCM scm_class_applicable;
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SCM scm_class_applicable_struct, scm_class_applicable_struct_with_setter;
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SCM scm_class_generic, scm_class_generic_with_setter;
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SCM scm_class_accessor;
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SCM scm_class_extended_generic, scm_class_extended_generic_with_setter;
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SCM scm_class_extended_accessor;
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SCM scm_class_method;
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SCM scm_class_accessor_method;
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SCM scm_class_procedure_class;
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SCM scm_class_applicable_struct_class;
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SCM scm_class_number, scm_class_list;
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SCM scm_class_keyword;
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SCM scm_class_port, scm_class_input_output_port;
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SCM scm_class_input_port, scm_class_output_port;
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SCM scm_class_foreign_slot;
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SCM scm_class_self, scm_class_protected;
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SCM scm_class_hidden, scm_class_opaque, scm_class_read_only;
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SCM scm_class_protected_hidden, scm_class_protected_opaque, scm_class_protected_read_only;
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SCM scm_class_scm;
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SCM scm_class_int, scm_class_float, scm_class_double;
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static SCM class_foreign;
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static SCM class_hashtable;
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static SCM class_fluid;
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static SCM class_dynamic_state;
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static SCM class_frame;
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static SCM class_objcode;
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static SCM class_vm;
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static SCM class_vm_cont;
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static SCM class_bytevector;
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static SCM class_uvec;
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static SCM class_array;
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static SCM class_bitvector;
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static SCM vtable_class_map = SCM_BOOL_F;
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/* Port classes. Allocate 3 times the maximum number of port types so that
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input ports, output ports, and in/out ports can be stored at different
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offsets. See `SCM_IN_PCLASS_INDEX' et al. */
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SCM scm_port_class[3 * SCM_I_MAX_PORT_TYPE_COUNT];
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/* SMOB classes. */
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SCM scm_smob_class[SCM_I_MAX_SMOB_TYPE_COUNT];
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SCM scm_no_applicable_method;
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SCM_SYMBOL (scm_sym_define_public, "define-public");
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static SCM scm_make_unbound (void);
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static SCM scm_unbound_p (SCM obj);
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static SCM scm_assert_bound (SCM value, SCM obj);
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static SCM scm_at_assert_bound_ref (SCM obj, SCM index);
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static SCM scm_sys_goops_loaded (void);
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static SCM scm_make_extended_class_from_symbol (SCM type_name_sym,
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int applicablep);
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SCM
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scm_i_define_class_for_vtable (SCM vtable)
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{
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SCM class;
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scm_i_pthread_mutex_lock (&scm_i_misc_mutex);
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if (scm_is_false (vtable_class_map))
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vtable_class_map = scm_c_make_weak_table (0, SCM_WEAK_TABLE_KIND_KEY);
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scm_i_pthread_mutex_unlock (&scm_i_misc_mutex);
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if (scm_is_false (scm_struct_vtable_p (vtable)))
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abort ();
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class = scm_weak_table_refq (vtable_class_map, vtable, SCM_BOOL_F);
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if (scm_is_false (class))
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{
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if (SCM_UNPACK (scm_class_class))
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{
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SCM name = SCM_VTABLE_NAME (vtable);
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if (!scm_is_symbol (name))
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name = scm_string_to_symbol (scm_nullstr);
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class = scm_make_extended_class_from_symbol
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(name, SCM_VTABLE_FLAG_IS_SET (vtable, SCM_VTABLE_FLAG_APPLICABLE));
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}
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else
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/* `create_struct_classes' will fill this in later. */
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class = SCM_BOOL_F;
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/* Don't worry about races. This only happens when creating a
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vtable, which happens by definition in one thread. */
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scm_weak_table_putq_x (vtable_class_map, vtable, class);
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}
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return class;
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}
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/* This function is used for efficient type dispatch. */
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SCM_DEFINE (scm_class_of, "class-of", 1, 0, 0,
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(SCM x),
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"Return the class of @var{x}.")
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#define FUNC_NAME s_scm_class_of
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{
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switch (SCM_ITAG3 (x))
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{
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case scm_tc3_int_1:
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case scm_tc3_int_2:
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return scm_class_integer;
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case scm_tc3_imm24:
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if (SCM_CHARP (x))
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return scm_class_char;
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else if (scm_is_bool (x))
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return scm_class_boolean;
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else if (scm_is_null (x))
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return scm_class_null;
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else
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return scm_class_unknown;
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case scm_tc3_cons:
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switch (SCM_TYP7 (x))
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{
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case scm_tcs_cons_nimcar:
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return scm_class_pair;
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case scm_tc7_symbol:
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return scm_class_symbol;
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case scm_tc7_vector:
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case scm_tc7_wvect:
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return scm_class_vector;
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case scm_tc7_pointer:
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return class_foreign;
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case scm_tc7_hashtable:
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return class_hashtable;
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case scm_tc7_fluid:
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return class_fluid;
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case scm_tc7_dynamic_state:
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return class_dynamic_state;
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case scm_tc7_frame:
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return class_frame;
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case scm_tc7_objcode:
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return class_objcode;
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case scm_tc7_vm:
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return class_vm;
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case scm_tc7_vm_cont:
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return class_vm_cont;
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case scm_tc7_bytevector:
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if (SCM_BYTEVECTOR_ELEMENT_TYPE (x) == SCM_ARRAY_ELEMENT_TYPE_VU8)
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return class_bytevector;
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else
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return class_uvec;
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case scm_tc7_array:
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return class_array;
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case scm_tc7_bitvector:
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return class_bitvector;
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case scm_tc7_string:
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return scm_class_string;
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case scm_tc7_number:
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switch SCM_TYP16 (x) {
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case scm_tc16_big:
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return scm_class_integer;
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case scm_tc16_real:
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return scm_class_real;
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case scm_tc16_complex:
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return scm_class_complex;
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case scm_tc16_fraction:
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return scm_class_fraction;
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}
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case scm_tc7_program:
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if (SCM_PROGRAM_IS_PRIMITIVE_GENERIC (x)
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&& SCM_UNPACK (*SCM_SUBR_GENERIC (x)))
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return scm_class_primitive_generic;
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else
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return scm_class_procedure;
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case scm_tc7_rtl_program:
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return scm_class_procedure;
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case scm_tc7_smob:
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{
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scm_t_bits type = SCM_TYP16 (x);
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if (type != scm_tc16_port_with_ps)
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return scm_smob_class[SCM_TC2SMOBNUM (type)];
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x = SCM_PORT_WITH_PS_PORT (x);
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/* fall through to ports */
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}
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case scm_tc7_port:
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return scm_port_class[(SCM_WRTNG & SCM_CELL_WORD_0 (x)
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? (SCM_RDNG & SCM_CELL_WORD_0 (x)
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? SCM_INOUT_PCLASS_INDEX | SCM_PTOBNUM (x)
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: SCM_OUT_PCLASS_INDEX | SCM_PTOBNUM (x))
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: SCM_IN_PCLASS_INDEX | SCM_PTOBNUM (x))];
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case scm_tcs_struct:
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if (SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_GOOPS_VALID)
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return SCM_CLASS_OF (x);
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else if (SCM_OBJ_CLASS_FLAGS (x) & SCM_CLASSF_GOOPS)
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{
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/* Goops object */
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if (! scm_is_false (SCM_OBJ_CLASS_REDEF (x)))
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scm_change_object_class (x,
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SCM_CLASS_OF (x), /* old */
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SCM_OBJ_CLASS_REDEF (x)); /* new */
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return SCM_CLASS_OF (x);
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}
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else
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return scm_i_define_class_for_vtable (SCM_CLASS_OF (x));
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default:
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if (scm_is_pair (x))
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return scm_class_pair;
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else
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return scm_class_unknown;
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}
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case scm_tc3_struct:
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case scm_tc3_tc7_1:
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case scm_tc3_tc7_2:
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/* case scm_tc3_unused: */
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/* Never reached */
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break;
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}
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return scm_class_unknown;
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}
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#undef FUNC_NAME
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/******************************************************************************
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*
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* Compute-cpl
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*
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* This version doesn't fully handle multiple-inheritance. It serves
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* only for booting classes and will be overloaded in Scheme
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*
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******************************************************************************/
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static SCM
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map (SCM (*proc) (SCM), SCM ls)
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{
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if (scm_is_null (ls))
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return ls;
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else
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{
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SCM res = scm_cons (proc (SCM_CAR (ls)), SCM_EOL);
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SCM h = res;
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ls = SCM_CDR (ls);
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while (scm_is_pair (ls))
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{
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SCM_SETCDR (h, scm_cons (proc (SCM_CAR (ls)), SCM_EOL));
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h = SCM_CDR (h);
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ls = SCM_CDR (ls);
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}
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return res;
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}
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}
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static SCM
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filter_cpl (SCM ls)
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{
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||
SCM res = SCM_EOL;
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while (scm_is_pair (ls))
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||
{
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||
SCM el = SCM_CAR (ls);
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if (scm_is_false (scm_c_memq (el, res)))
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||
res = scm_cons (el, res);
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||
ls = SCM_CDR (ls);
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||
}
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||
return res;
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||
}
|
||
|
||
static SCM
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||
compute_cpl (SCM class)
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||
{
|
||
if (goops_loaded_p)
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||
return scm_call_1 (SCM_VARIABLE_REF (var_compute_cpl), class);
|
||
else
|
||
{
|
||
SCM supers = SCM_SLOT (class, scm_si_direct_supers);
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||
SCM ls = scm_append (scm_acons (class, supers,
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map (compute_cpl, supers)));
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return scm_reverse_x (filter_cpl (ls), SCM_EOL);
|
||
}
|
||
}
|
||
|
||
/******************************************************************************
|
||
*
|
||
* compute-slots
|
||
*
|
||
******************************************************************************/
|
||
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||
static SCM
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||
remove_duplicate_slots (SCM l, SCM res, SCM slots_already_seen)
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||
{
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||
SCM tmp;
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||
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if (!scm_is_pair (l))
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||
return res;
|
||
|
||
tmp = SCM_CAAR (l);
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||
if (!scm_is_symbol (tmp))
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||
scm_misc_error ("%compute-slots", "bad slot name ~S", scm_list_1 (tmp));
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||
|
||
if (scm_is_false (scm_c_memq (tmp, slots_already_seen))) {
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||
res = scm_cons (SCM_CAR (l), res);
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slots_already_seen = scm_cons (tmp, slots_already_seen);
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||
}
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||
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return remove_duplicate_slots (SCM_CDR (l), res, slots_already_seen);
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||
}
|
||
|
||
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 <class> 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 <class> 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 (); */
|
||
|
||
/**** <class> ****/
|
||
SCM cs = scm_from_locale_string (SCM_CLASS_CLASS_LAYOUT);
|
||
SCM name = scm_from_latin1_symbol ("<class>");
|
||
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);
|
||
|
||
/**** <top> ****/
|
||
name = scm_from_latin1_symbol ("<top>");
|
||
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);
|
||
|
||
/**** <object> ****/
|
||
name = scm_from_latin1_symbol ("<object>");
|
||
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);
|
||
|
||
/* <top> <object> and <class> 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 <Dave_McClain@msn.com>
|
||
*/
|
||
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, "<foreign-slot>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_protected, "<protected-slot>",
|
||
scm_class_class, scm_class_foreign_slot, SCM_EOL);
|
||
make_stdcls (&scm_class_hidden, "<hidden-slot>",
|
||
scm_class_class, scm_class_foreign_slot, SCM_EOL);
|
||
make_stdcls (&scm_class_opaque, "<opaque-slot>",
|
||
scm_class_class, scm_class_foreign_slot, SCM_EOL);
|
||
make_stdcls (&scm_class_read_only, "<read-only-slot>",
|
||
scm_class_class, scm_class_foreign_slot, SCM_EOL);
|
||
make_stdcls (&scm_class_self, "<self-slot>",
|
||
scm_class_class, scm_class_read_only, SCM_EOL);
|
||
make_stdcls (&scm_class_protected_opaque, "<protected-opaque-slot>",
|
||
scm_class_class,
|
||
scm_list_2 (scm_class_protected, scm_class_opaque),
|
||
SCM_EOL);
|
||
make_stdcls (&scm_class_protected_hidden, "<protected-hidden-slot>",
|
||
scm_class_class,
|
||
scm_list_2 (scm_class_protected, scm_class_hidden),
|
||
SCM_EOL);
|
||
make_stdcls (&scm_class_protected_read_only, "<protected-read-only-slot>",
|
||
scm_class_class,
|
||
scm_list_2 (scm_class_protected, scm_class_read_only),
|
||
SCM_EOL);
|
||
make_stdcls (&scm_class_scm, "<scm-slot>",
|
||
scm_class_class, scm_class_protected, SCM_EOL);
|
||
make_stdcls (&scm_class_int, "<int-slot>",
|
||
scm_class_class, scm_class_foreign_slot, SCM_EOL);
|
||
make_stdcls (&scm_class_float, "<float-slot>",
|
||
scm_class_class, scm_class_foreign_slot, SCM_EOL);
|
||
make_stdcls (&scm_class_double, "<double-slot>",
|
||
scm_class_class, scm_class_foreign_slot, SCM_EOL);
|
||
|
||
/* Continue initialization of class <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, "<procedure-class>",
|
||
scm_class_class, scm_class_class, SCM_EOL);
|
||
make_stdcls (&scm_class_applicable_struct_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, "<method>",
|
||
scm_class_class, scm_class_object, method_slots);
|
||
make_stdcls (&scm_class_accessor_method, "<accessor-method>",
|
||
scm_class_class, scm_class_method, amethod_slots);
|
||
make_stdcls (&scm_class_applicable, "<applicable>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_applicable_struct, "<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, "<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, "<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, "<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, "<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,
|
||
"<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, "<extended-accessor>",
|
||
scm_class_applicable_struct_class,
|
||
scm_list_2 (scm_class_accessor,
|
||
scm_class_extended_generic_with_setter),
|
||
SCM_EOL);
|
||
/* <extended-generic> 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, "<boolean>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_char, "<char>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_list, "<list>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_pair, "<pair>",
|
||
scm_class_class, scm_class_list, SCM_EOL);
|
||
make_stdcls (&scm_class_null, "<null>",
|
||
scm_class_class, scm_class_list, SCM_EOL);
|
||
make_stdcls (&scm_class_string, "<string>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_symbol, "<symbol>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_vector, "<vector>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_foreign, "<foreign>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_hashtable, "<hashtable>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_fluid, "<fluid>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_dynamic_state, "<dynamic-state>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_frame, "<frame>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_objcode, "<objcode>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_vm, "<vm>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_vm_cont, "<vm-continuation>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_bytevector, "<bytevector>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_uvec, "<uvec>",
|
||
scm_class_class, class_bytevector, SCM_EOL);
|
||
make_stdcls (&class_array, "<array>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&class_bitvector, "<bitvector>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_number, "<number>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_complex, "<complex>",
|
||
scm_class_class, scm_class_number, SCM_EOL);
|
||
make_stdcls (&scm_class_real, "<real>",
|
||
scm_class_class, scm_class_complex, SCM_EOL);
|
||
make_stdcls (&scm_class_integer, "<integer>",
|
||
scm_class_class, scm_class_real, SCM_EOL);
|
||
make_stdcls (&scm_class_fraction, "<fraction>",
|
||
scm_class_class, scm_class_real, SCM_EOL);
|
||
make_stdcls (&scm_class_keyword, "<keyword>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_unknown, "<unknown>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_procedure, "<procedure>",
|
||
scm_class_procedure_class, scm_class_applicable, SCM_EOL);
|
||
make_stdcls (&scm_class_primitive_generic, "<primitive-generic>",
|
||
scm_class_procedure_class, scm_class_procedure, SCM_EOL);
|
||
make_stdcls (&scm_class_port, "<port>",
|
||
scm_class_class, scm_class_top, SCM_EOL);
|
||
make_stdcls (&scm_class_input_port, "<input-port>",
|
||
scm_class_class, scm_class_port, SCM_EOL);
|
||
make_stdcls (&scm_class_output_port, "<output-port>",
|
||
scm_class_class, scm_class_port, SCM_EOL);
|
||
make_stdcls (&scm_class_input_output_port, "<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:
|
||
*/
|