4898959901
* libguile/struct.h: Steal another flag for GOOPS.
* libguile/goops.h (SCM_VTABLE_FLAG_GOOPS_INDIRECT)
(SCM_VTABLE_FLAG_GOOPS_NEEDS_MIGRATION): New flags.
(SCM_CLASSF_GOOPS_VALID, SCM_CLASSF_GOOPS_OR_VALID): Remove obsolete
definitions.
(SCM_IS_A_P): Use the scm_class_of function.
* libguile/goops.c (var_class_of_obsolete_indirect_instance): Rename
from var_migrate_instance.
(scm_is_generic, scm_is_method, scm_sys_init_layout_x): Use
scm_class_of instead of the SCM_CLASS_OF macro.
(get_indirect_slots): New helper.
(scm_class_of): This patch moves us in a direction where we won't be
able to separately address a struct's data and its identity.
Therefore to check whether a class needs migration, we check an
embedded pointer from a slot instead of the vtable data.
(scm_sys_struct_data): Remove this temporary function.
(scm_sys_modify_instance): Update to swap slot values instead of the
data pointers themselves.
(scm_sys_modify_class): Use scm_sys_modify_instance.
(scm_sys_goops_loaded): Capture class-of-obsolete-indirect-instance
instead of migrate-instance.
(scm_init_goops_builtins): Don't export the "valid" flag any more;
export instead the "indirect" and "needs-migration" flags.
* libguile/foreign-object.c (scm_assert_foreign_object_type): Add a
FIXME.
* libguile/vm-engine.c (class-of): Take away fast path for the time
being.
* module/oop/goops.scm (class-has-indirect-instances?)
(indirect-slots-need-migration?): New helpers.
(<class>, <slot>, %class-slot-definition, initialize): Remove use of
vtable-flag-goops-valid.
(define-class): Always push redefined values through
`class-redefinition'.
(<redefinable-class>): New public definition. Use it as a metaclass
for redefinable classes. Provide a compute-slots function that
declares the indirect slots mechanism. Add the "indirect" flag to
instances of <redefinable-class>. Create indirect-slots objects for
instances of those classes as part of their allocate-instance.
(change-object-class, class-of-obsolete-indirect-instance): Update for
new representation change.
* test-suite/tests/goops.test ("object update"): Add #:metaclass
<redefinable-class> to all redefinable classes. For the "hell" test,
make the new classes with class-direct-slots, not class-slots; this
was an error in the test.
159 lines
6.4 KiB
C
159 lines
6.4 KiB
C
/* classes: h_files */
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#ifndef SCM_GOOPS_H
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#define SCM_GOOPS_H
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/* Copyright (C) 1998,1999,2000,2001,2002,2003, 2006, 2008, 2009, 2011, 2015, 2017 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.h from the STk distribution by
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* Erick Gallesio <eg@unice.fr>.
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*/
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#include "libguile/__scm.h"
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#include "libguile/validate.h"
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/* {Class flags}
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*
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* These are used for efficient identification of instances of a
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* certain class or its subclasses when traversal of the inheritance
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* graph would be too costly.
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*/
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/* Set for all GOOPS classes. */
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#define SCM_VTABLE_FLAG_GOOPS_CLASS SCM_VTABLE_FLAG_GOOPS_0
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/* Set for GOOPS classes whose instances are <slot> objects. */
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#define SCM_VTABLE_FLAG_GOOPS_SLOT SCM_VTABLE_FLAG_GOOPS_1
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/* Set for GOOPS classes whose instance's slots must always be allocated
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to the same indices, for all concrete subclasses. */
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#define SCM_VTABLE_FLAG_GOOPS_STATIC_SLOT_ALLOCATION SCM_VTABLE_FLAG_GOOPS_2
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/* Set for GOOPS classes whose instances are "indirect", meaning they
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just have one slot that indirects to a direct instance with the
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slots. For non-class instances, this is at struct slot 0. For class
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instances, it's the first slot after the <class> fixed slots. */
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#define SCM_VTABLE_FLAG_GOOPS_INDIRECT SCM_VTABLE_FLAG_GOOPS_3
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/* For indirect classes, the slots object itself has a direct vtable.
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This flag will be set on that vtable if the instance needs to migrate
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to a new class. */
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#define SCM_VTABLE_FLAG_GOOPS_NEEDS_MIGRATION SCM_VTABLE_FLAG_GOOPS_4
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#define SCM_CLASS_OF(x) SCM_STRUCT_VTABLE (x)
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#define SCM_CLASS_FLAGS(class) (SCM_VTABLE_FLAGS (class))
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#define SCM_OBJ_CLASS_FLAGS(obj) (SCM_STRUCT_VTABLE_FLAGS (obj))
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#define SCM_SET_CLASS_FLAGS(c, f) (SCM_SET_VTABLE_FLAGS (c, f))
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#define SCM_CLEAR_CLASS_FLAGS(c, f) (SCM_CLEAR_VTABLE_FLAGS (c, f))
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#define SCM_CLASSF_METACLASS (SCM_VTABLE_FLAG_GOOPS_CLASS|SCM_VTABLE_FLAG_VTABLE)
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#define SCM_CLASSF_GOOPS SCM_VTABLE_FLAG_GOOPS_CLASS
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#define SCM_CLASS_OF(x) SCM_STRUCT_VTABLE (x)
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#define SCM_CLASSP(x) \
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(SCM_STRUCTP (x) && SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_METACLASS)
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#define SCM_VALIDATE_CLASS(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, CLASSP, "class")
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#define SCM_INSTANCEP(x) \
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(SCM_STRUCTP (x) && (SCM_STRUCT_VTABLE_FLAGS (x) & SCM_CLASSF_GOOPS))
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#define SCM_VALIDATE_INSTANCE(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, INSTANCEP, "instance")
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#define SCM_SLOT(x, i) (SCM_STRUCT_SLOT_REF (x, i))
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#define SCM_SET_SLOT(x, i, v) (SCM_STRUCT_SLOT_SET (x, i, v))
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#define SCM_SUBCLASSP(c1, c2) \
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(scm_is_true (scm_c_memq (c2, scm_class_precedence_list (c1))))
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#define SCM_IS_A_P(x, c) \
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(SCM_INSTANCEP (x) && SCM_SUBCLASSP (scm_class_of (x), c))
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#define SCM_GENERICP(x) (scm_is_generic (x))
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#define SCM_VALIDATE_GENERIC(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, GENERICP, "generic function")
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#define SCM_METHODP(x) (scm_is_method (x))
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#define SCM_VALIDATE_METHOD(pos, x) SCM_MAKE_VALIDATE_MSG (pos, x, METHODP, "method")
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#define SCM_SET_CLASS_DESTRUCTOR(c, d) SCM_SET_VTABLE_DESTRUCTOR (c, d)
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SCM_INTERNAL SCM scm_i_smob_class[];
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SCM_API SCM scm_module_goops;
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SCM_API SCM scm_goops_version (void);
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SCM_API void scm_load_goops (void);
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SCM_API SCM scm_make_extended_class (char const *type_name, int applicablep);
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SCM_INTERNAL void scm_make_port_classes (scm_t_port_type *ptob);
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SCM_API SCM scm_ensure_accessor (SCM name);
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SCM_API SCM scm_class_of (SCM obj);
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/* Low level functions exported */
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SCM_INTERNAL SCM scm_make_standard_class (SCM meta, SCM name, SCM dsupers,
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SCM dslots);
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/* Primitives exported */
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SCM_API SCM scm_slot_ref (SCM obj, SCM slot_name);
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SCM_API SCM scm_slot_set_x (SCM obj, SCM slot_name, SCM value);
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SCM_INTERNAL void scm_i_inherit_applicable (SCM c);
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SCM_API SCM scm_instance_p (SCM obj);
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SCM_API int scm_is_generic (SCM x);
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SCM_API int scm_is_method (SCM x);
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SCM_API SCM scm_class_name (SCM obj);
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SCM_API SCM scm_class_direct_supers (SCM obj);
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SCM_API SCM scm_class_direct_slots (SCM obj);
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SCM_API SCM scm_class_direct_subclasses (SCM obj);
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SCM_API SCM scm_class_direct_methods (SCM obj);
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SCM_API SCM scm_class_precedence_list (SCM obj);
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SCM_API SCM scm_class_slots (SCM obj);
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SCM_API SCM scm_generic_function_name (SCM obj);
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SCM_API SCM scm_generic_function_methods (SCM obj);
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SCM_API SCM scm_method_generic_function (SCM obj);
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SCM_API SCM scm_method_specializers (SCM obj);
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SCM_API SCM scm_method_procedure (SCM obj);
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SCM_API SCM scm_slot_bound_p (SCM obj, SCM slot_name);
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SCM_API SCM scm_slot_exists_p (SCM obj, SCM slot_name);
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SCM_API SCM scm_sys_modify_instance (SCM old, SCM newinst);
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SCM_API SCM scm_sys_modify_class (SCM old, SCM newcls);
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SCM_API SCM scm_generic_capability_p (SCM proc);
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SCM_API SCM scm_enable_primitive_generic_x (SCM subrs);
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SCM_INTERNAL SCM scm_set_primitive_generic_x (SCM subr, SCM generic);
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SCM_API SCM scm_primitive_generic_generic (SCM subr);
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SCM_API SCM scm_make (SCM args);
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/* These procedures are for dispatching to a generic when a primitive
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fails to apply. They raise a wrong-type-arg error if the primitive's
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generic has not been initialized yet. */
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SCM_API SCM scm_wta_dispatch_0 (SCM gf, const char *subr);
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SCM_API SCM scm_wta_dispatch_1 (SCM gf, SCM a1, int pos, const char *subr);
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SCM_API SCM scm_wta_dispatch_2 (SCM gf, SCM a1, SCM a2, int pos, const char *subr);
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SCM_API SCM scm_wta_dispatch_n (SCM gf, SCM args, int pos, const char *subr);
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SCM_INTERNAL SCM scm_i_define_class_for_vtable (SCM vtable);
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SCM_INTERNAL void scm_init_goops (void);
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#endif /* SCM_GOOPS_H */
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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