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b680b632e5
Updating RCLASS_PARENT_SUBCLASSES and RCLASS_MODULE_SUBCLASSES while compacting can trigger the read barrier. This commit makes RCLASS_SUBCLASSES a doubly linked list with a dedicated head object so that we can add and remove entries from the list without having to touch an object in the Ruby heap
196 lines
6.5 KiB
C
196 lines
6.5 KiB
C
#ifndef INTERNAL_CLASS_H /*-*-C-*-vi:se ft=c:*/
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#define INTERNAL_CLASS_H
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/**
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* @author Ruby developers <ruby-core@ruby-lang.org>
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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* @brief Internal header for Class.
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*/
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#include "id_table.h" /* for struct rb_id_table */
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#include "internal/gc.h" /* for RB_OBJ_WRITE */
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#include "internal/serial.h" /* for rb_serial_t */
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#include "ruby/internal/stdbool.h" /* for bool */
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#include "ruby/intern.h" /* for rb_alloc_func_t */
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#include "ruby/ruby.h" /* for struct RBasic */
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#ifdef RCLASS_SUPER
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# undef RCLASS_SUPER
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#endif
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struct rb_subclass_entry {
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VALUE klass;
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struct rb_subclass_entry *next;
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struct rb_subclass_entry *prev;
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};
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struct rb_iv_index_tbl_entry {
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uint32_t index;
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rb_serial_t class_serial;
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VALUE class_value;
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};
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struct rb_cvar_class_tbl_entry {
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uint32_t index;
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rb_serial_t global_cvar_state;
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VALUE class_value;
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};
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struct rb_classext_struct {
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struct st_table *iv_index_tbl; // ID -> struct rb_iv_index_tbl_entry
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struct st_table *iv_tbl;
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#if SIZEOF_SERIAL_T == SIZEOF_VALUE /* otherwise m_tbl is in struct RClass */
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struct rb_id_table *m_tbl;
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#endif
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struct rb_id_table *const_tbl;
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struct rb_id_table *callable_m_tbl;
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struct rb_id_table *cc_tbl; /* ID -> [[ci, cc1], cc2, ...] */
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struct rb_id_table *cvc_tbl;
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struct rb_subclass_entry *subclasses;
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struct rb_subclass_entry *subclass_entry;
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/**
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* In the case that this is an `ICLASS`, `module_subclasses` points to the link
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* in the module's `subclasses` list that indicates that the klass has been
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* included. Hopefully that makes sense.
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*/
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struct rb_subclass_entry *module_subclass_entry;
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#if SIZEOF_SERIAL_T != SIZEOF_VALUE /* otherwise class_serial is in struct RClass */
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rb_serial_t class_serial;
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#endif
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const VALUE origin_;
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const VALUE refined_class;
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rb_alloc_func_t allocator;
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const VALUE includer;
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};
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struct RClass {
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struct RBasic basic;
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VALUE super;
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#if !USE_RVARGC
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struct rb_classext_struct *ptr;
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#endif
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#if SIZEOF_SERIAL_T == SIZEOF_VALUE
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/* Class serial is as wide as VALUE. Place it here. */
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rb_serial_t class_serial;
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#else
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/* Class serial does not fit into struct RClass. Place m_tbl instead. */
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struct rb_id_table *m_tbl;
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#endif
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};
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typedef struct rb_subclass_entry rb_subclass_entry_t;
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typedef struct rb_classext_struct rb_classext_t;
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#if USE_RVARGC
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# define RCLASS_EXT(c) ((rb_classext_t *)((char *)c + sizeof(struct RClass)))
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#else
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# define RCLASS_EXT(c) (RCLASS(c)->ptr)
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#endif
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#define RCLASS_IV_TBL(c) (RCLASS_EXT(c)->iv_tbl)
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#define RCLASS_CONST_TBL(c) (RCLASS_EXT(c)->const_tbl)
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#if SIZEOF_SERIAL_T == SIZEOF_VALUE
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# define RCLASS_M_TBL(c) (RCLASS_EXT(c)->m_tbl)
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#else
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# define RCLASS_M_TBL(c) (RCLASS(c)->m_tbl)
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#endif
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#define RCLASS_CALLABLE_M_TBL(c) (RCLASS_EXT(c)->callable_m_tbl)
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#define RCLASS_CC_TBL(c) (RCLASS_EXT(c)->cc_tbl)
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#define RCLASS_CVC_TBL(c) (RCLASS_EXT(c)->cvc_tbl)
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#define RCLASS_IV_INDEX_TBL(c) (RCLASS_EXT(c)->iv_index_tbl)
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#define RCLASS_ORIGIN(c) (RCLASS_EXT(c)->origin_)
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#define RCLASS_REFINED_CLASS(c) (RCLASS_EXT(c)->refined_class)
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#if SIZEOF_SERIAL_T == SIZEOF_VALUE
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# define RCLASS_SERIAL(c) (RCLASS(c)->class_serial)
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#else
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# define RCLASS_SERIAL(c) (RCLASS_EXT(c)->class_serial)
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#endif
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#define RCLASS_INCLUDER(c) (RCLASS_EXT(c)->includer)
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#define RCLASS_SUBCLASS_ENTRY(c) (RCLASS_EXT(c)->subclass_entry)
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#define RCLASS_MODULE_SUBCLASS_ENTRY(c) (RCLASS_EXT(c)->module_subclass_entry)
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#define RCLASS_ALLOCATOR(c) (RCLASS_EXT(c)->allocator)
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#define RCLASS_SUBCLASSES(c) (RCLASS_EXT(c)->subclasses)
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#define RICLASS_IS_ORIGIN FL_USER5
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#define RCLASS_CLONED FL_USER6
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#define RICLASS_ORIGIN_SHARED_MTBL FL_USER8
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/* class.c */
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void rb_class_subclass_add(VALUE super, VALUE klass);
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void rb_class_remove_from_super_subclasses(VALUE);
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void rb_class_remove_subclass_head(VALUE);
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int rb_singleton_class_internal_p(VALUE sklass);
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VALUE rb_class_boot(VALUE);
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VALUE rb_class_s_alloc(VALUE klass);
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VALUE rb_module_s_alloc(VALUE klass);
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void rb_module_set_initialized(VALUE module);
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void rb_module_check_initializable(VALUE module);
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VALUE rb_make_metaclass(VALUE, VALUE);
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VALUE rb_include_class_new(VALUE, VALUE);
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void rb_class_foreach_subclass(VALUE klass, void (*f)(VALUE, VALUE), VALUE);
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void rb_class_detach_subclasses(VALUE);
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void rb_class_detach_module_subclasses(VALUE);
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void rb_class_remove_from_module_subclasses(VALUE);
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VALUE rb_obj_methods(int argc, const VALUE *argv, VALUE obj);
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VALUE rb_obj_protected_methods(int argc, const VALUE *argv, VALUE obj);
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VALUE rb_obj_private_methods(int argc, const VALUE *argv, VALUE obj);
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VALUE rb_obj_public_methods(int argc, const VALUE *argv, VALUE obj);
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VALUE rb_special_singleton_class(VALUE);
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VALUE rb_singleton_class_clone_and_attach(VALUE obj, VALUE attach);
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VALUE rb_singleton_class_get(VALUE obj);
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void rb_undef_methods_from(VALUE klass, VALUE super);
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static inline void RCLASS_SET_ORIGIN(VALUE klass, VALUE origin);
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static inline void RICLASS_SET_ORIGIN_SHARED_MTBL(VALUE iclass);
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static inline VALUE RCLASS_SUPER(VALUE klass);
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static inline VALUE RCLASS_SET_SUPER(VALUE klass, VALUE super);
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static inline void RCLASS_SET_INCLUDER(VALUE iclass, VALUE klass);
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MJIT_SYMBOL_EXPORT_BEGIN
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VALUE rb_class_inherited(VALUE, VALUE);
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VALUE rb_keyword_error_new(const char *, VALUE);
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MJIT_SYMBOL_EXPORT_END
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static inline void
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RCLASS_SET_ORIGIN(VALUE klass, VALUE origin)
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{
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RB_OBJ_WRITE(klass, &RCLASS_ORIGIN(klass), origin);
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if (klass != origin) FL_SET(origin, RICLASS_IS_ORIGIN);
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}
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static inline void
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RICLASS_SET_ORIGIN_SHARED_MTBL(VALUE iclass)
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{
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FL_SET(iclass, RICLASS_ORIGIN_SHARED_MTBL);
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}
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static inline bool
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RICLASS_OWNS_M_TBL_P(VALUE iclass)
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{
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return FL_TEST_RAW(iclass, RICLASS_IS_ORIGIN | RICLASS_ORIGIN_SHARED_MTBL) == RICLASS_IS_ORIGIN;
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}
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static inline void
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RCLASS_SET_INCLUDER(VALUE iclass, VALUE klass)
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{
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RB_OBJ_WRITE(iclass, &RCLASS_INCLUDER(iclass), klass);
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}
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static inline VALUE
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RCLASS_SUPER(VALUE klass)
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{
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return RCLASS(klass)->super;
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}
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static inline VALUE
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RCLASS_SET_SUPER(VALUE klass, VALUE super)
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{
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if (super) {
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rb_class_remove_from_super_subclasses(klass);
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rb_class_subclass_add(super, klass);
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}
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RB_OBJ_WRITE(klass, &RCLASS(klass)->super, super);
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return super;
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}
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#endif /* INTERNAL_CLASS_H */
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