diff options
author | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-16 18:49:26 +0900 |
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committer | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-30 00:39:06 +0900 |
commit | fcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch) | |
tree | 64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/vm_method.c |
Fresh start
Diffstat (limited to 'jni/ruby/vm_method.c')
-rw-r--r-- | jni/ruby/vm_method.c | 1796 |
1 files changed, 1796 insertions, 0 deletions
diff --git a/jni/ruby/vm_method.c b/jni/ruby/vm_method.c new file mode 100644 index 0000000..3159b22 --- /dev/null +++ b/jni/ruby/vm_method.c @@ -0,0 +1,1796 @@ +/* + * This file is included by vm.c + */ + +#if OPT_GLOBAL_METHOD_CACHE +#ifndef GLOBAL_METHOD_CACHE_SIZE +#define GLOBAL_METHOD_CACHE_SIZE 0x800 +#endif +#define LSB_ONLY(x) ((x) & ~((x) - 1)) +#define POWER_OF_2_P(x) ((x) == LSB_ONLY(x)) +#if !POWER_OF_2_P(GLOBAL_METHOD_CACHE_SIZE) +# error GLOBAL_METHOD_CACHE_SIZE must be power of 2 +#endif +#ifndef GLOBAL_METHOD_CACHE_MASK +#define GLOBAL_METHOD_CACHE_MASK (GLOBAL_METHOD_CACHE_SIZE-1) +#endif + +#define GLOBAL_METHOD_CACHE_KEY(c,m) ((((c)>>3)^(m))&(global_method_cache.mask)) +#define GLOBAL_METHOD_CACHE(c,m) (global_method_cache.entries + GLOBAL_METHOD_CACHE_KEY(c,m)) +#else +#define GLOBAL_METHOD_CACHE(c,m) (rb_bug("global method cache disabled improperly"), NULL) +#endif +#include "method.h" + +#define NOEX_NOREDEF 0 +#ifndef NOEX_NOREDEF +#define NOEX_NOREDEF NOEX_RESPONDS +#endif + +static void rb_vm_check_redefinition_opt_method(const rb_method_entry_t *me, VALUE klass); + +#define object_id idObject_id +#define added idMethod_added +#define singleton_added idSingleton_method_added +#define removed idMethod_removed +#define singleton_removed idSingleton_method_removed +#define undefined idMethod_undefined +#define singleton_undefined idSingleton_method_undefined +#define attached id__attached__ + +struct cache_entry { + rb_serial_t method_state; + rb_serial_t class_serial; + ID mid; + rb_method_entry_t* me; + VALUE defined_class; +}; + +#if OPT_GLOBAL_METHOD_CACHE +static struct { + unsigned int size; + unsigned int mask; + struct cache_entry *entries; +} global_method_cache = { + GLOBAL_METHOD_CACHE_SIZE, + GLOBAL_METHOD_CACHE_MASK, +}; +#endif + +#define ruby_running (GET_VM()->running) +/* int ruby_running = 0; */ + +static void +rb_class_clear_method_cache(VALUE klass) +{ + RCLASS_SERIAL(klass) = rb_next_class_serial(); + rb_class_foreach_subclass(klass, rb_class_clear_method_cache); +} + +void +rb_clear_cache(void) +{ + rb_warning("rb_clear_cache() is deprecated."); + INC_GLOBAL_METHOD_STATE(); + INC_GLOBAL_CONSTANT_STATE(); +} + +void +rb_clear_constant_cache(void) +{ + INC_GLOBAL_CONSTANT_STATE(); +} + +void +rb_clear_method_cache_by_class(VALUE klass) +{ + if (klass && klass != Qundef) { + int global = klass == rb_cBasicObject || klass == rb_cObject || klass == rb_mKernel; + + if (RUBY_DTRACE_METHOD_CACHE_CLEAR_ENABLED()) { + RUBY_DTRACE_METHOD_CACHE_CLEAR(global ? "global" : rb_class2name(klass), rb_sourcefile(), rb_sourceline()); + } + + if (global) { + INC_GLOBAL_METHOD_STATE(); + } + else { + rb_class_clear_method_cache(klass); + } + } +} + +VALUE +rb_f_notimplement(int argc, const VALUE *argv, VALUE obj) +{ + rb_notimplement(); + + UNREACHABLE; +} + +static void +rb_define_notimplement_method_id(VALUE mod, ID id, rb_method_flag_t noex) +{ + rb_add_method(mod, id, VM_METHOD_TYPE_NOTIMPLEMENTED, 0, noex); +} + +void +rb_add_method_cfunc(VALUE klass, ID mid, VALUE (*func)(ANYARGS), int argc, rb_method_flag_t noex) +{ + if (argc < -2 || 15 < argc) rb_raise(rb_eArgError, "arity out of range: %d for -2..15", argc); + if (func != rb_f_notimplement) { + rb_method_cfunc_t opt; + opt.func = func; + opt.argc = argc; + rb_add_method(klass, mid, VM_METHOD_TYPE_CFUNC, &opt, noex); + } + else { + rb_define_notimplement_method_id(klass, mid, noex); + } +} + +void +rb_unlink_method_entry(rb_method_entry_t *me) +{ + struct unlinked_method_entry_list_entry *ume = ALLOC(struct unlinked_method_entry_list_entry); + ume->me = me; + ume->next = GET_VM()->unlinked_method_entry_list; + GET_VM()->unlinked_method_entry_list = ume; +} + +void +rb_gc_mark_unlinked_live_method_entries(void *pvm) +{ + rb_vm_t *vm = pvm; + struct unlinked_method_entry_list_entry *ume = vm->unlinked_method_entry_list; + + while (ume) { + if (ume->me->mark) { + rb_mark_method_entry(ume->me); + } + ume = ume->next; + } +} + +void +rb_sweep_method_entry(void *pvm) +{ + rb_vm_t *vm = pvm; + struct unlinked_method_entry_list_entry **prev_ume = &vm->unlinked_method_entry_list, *ume = *prev_ume, *curr_ume; + + while (ume) { + if (ume->me->mark) { + ume->me->mark = 0; + prev_ume = &ume->next; + ume = *prev_ume; + } + else { + rb_free_method_entry(ume->me); + + curr_ume = ume; + ume = ume->next; + *prev_ume = ume; + xfree(curr_ume); + } + } +} + +static void +release_method_definition(rb_method_definition_t *def) +{ + if (def == 0) + return; + if (def->alias_count == 0) { + if (def->type == VM_METHOD_TYPE_REFINED && + def->body.orig_me) { + rb_free_method_entry(def->body.orig_me); + } + xfree(def); + } + else if (def->alias_count > 0) { + def->alias_count--; + } +} + +void +rb_free_method_entry(rb_method_entry_t *me) +{ + release_method_definition(me->def); + xfree(me); +} + +static inline rb_method_entry_t *search_method(VALUE klass, ID id, VALUE *defined_class_ptr); +static int rb_method_definition_eq(const rb_method_definition_t *d1, const rb_method_definition_t *d2); + +static inline rb_method_entry_t * +lookup_method_table(VALUE klass, ID id) +{ + st_data_t body; + st_table *m_tbl = RCLASS_M_TBL(klass); + if (st_lookup(m_tbl, id, &body)) { + return (rb_method_entry_t *) body; + } + else { + return 0; + } +} + +static void +make_method_entry_refined(rb_method_entry_t *me) +{ + rb_method_definition_t *new_def; + + if (me->def && me->def->type == VM_METHOD_TYPE_REFINED) + return; + + new_def = ALLOC(rb_method_definition_t); + new_def->type = VM_METHOD_TYPE_REFINED; + new_def->original_id = me->called_id; + new_def->alias_count = 0; + new_def->body.orig_me = ALLOC(rb_method_entry_t); + *new_def->body.orig_me = *me; + rb_vm_check_redefinition_opt_method(me, me->klass); + if (me->def) me->def->alias_count++; + me->flag = NOEX_WITH_SAFE(NOEX_PUBLIC); + me->def = new_def; +} + +void +rb_add_refined_method_entry(VALUE refined_class, ID mid) +{ + rb_method_entry_t *me = lookup_method_table(refined_class, mid); + + if (me) { + make_method_entry_refined(me); + rb_clear_method_cache_by_class(refined_class); + } + else { + rb_add_method(refined_class, mid, VM_METHOD_TYPE_REFINED, 0, + NOEX_PUBLIC); + } +} + +static rb_method_entry_t * +rb_method_entry_make(VALUE klass, ID mid, rb_method_type_t type, + rb_method_definition_t *def, rb_method_flag_t noex, + VALUE defined_class) +{ + rb_method_entry_t *me; +#if NOEX_NOREDEF + VALUE rklass; +#endif + st_table *mtbl; + st_data_t data; + int make_refined = 0; + + if (NIL_P(klass)) { + klass = rb_cObject; + } + if (!FL_TEST(klass, FL_SINGLETON) && + type != VM_METHOD_TYPE_NOTIMPLEMENTED && + type != VM_METHOD_TYPE_ZSUPER) { + switch (mid) { + case idInitialize: + case idInitialize_copy: + case idInitialize_clone: + case idInitialize_dup: + case idRespond_to_missing: + noex |= NOEX_PRIVATE; + } + } + + rb_frozen_class_p(klass); +#if NOEX_NOREDEF + rklass = klass; +#endif + if (FL_TEST(klass, RMODULE_IS_REFINEMENT)) { + VALUE refined_class = + rb_refinement_module_get_refined_class(klass); + + rb_add_refined_method_entry(refined_class, mid); + } + if (type == VM_METHOD_TYPE_REFINED) { + rb_method_entry_t *old_me = + lookup_method_table(RCLASS_ORIGIN(klass), mid); + if (old_me) rb_vm_check_redefinition_opt_method(old_me, klass); + } + else { + klass = RCLASS_ORIGIN(klass); + } + mtbl = RCLASS_M_TBL(klass); + + /* check re-definition */ + if (st_lookup(mtbl, mid, &data)) { + rb_method_entry_t *old_me = (rb_method_entry_t *)data; + rb_method_definition_t *old_def = old_me->def; + + if (rb_method_definition_eq(old_def, def)) return old_me; +#if NOEX_NOREDEF + if (old_me->flag & NOEX_NOREDEF) { + rb_raise(rb_eTypeError, "cannot redefine %"PRIsVALUE"#%"PRIsVALUE, + rb_class_name(rklass), rb_id2str(mid)); + } +#endif + rb_vm_check_redefinition_opt_method(old_me, klass); + if (old_def->type == VM_METHOD_TYPE_REFINED) + make_refined = 1; + + if (RTEST(ruby_verbose) && + type != VM_METHOD_TYPE_UNDEF && + old_def->alias_count == 0 && + old_def->type != VM_METHOD_TYPE_UNDEF && + old_def->type != VM_METHOD_TYPE_ZSUPER) { + rb_iseq_t *iseq = 0; + + rb_warning("method redefined; discarding old %"PRIsVALUE, rb_id2str(mid)); + switch (old_def->type) { + case VM_METHOD_TYPE_ISEQ: + iseq = old_def->body.iseq; + break; + case VM_METHOD_TYPE_BMETHOD: + iseq = rb_proc_get_iseq(old_def->body.proc, 0); + break; + default: + break; + } + if (iseq && !NIL_P(iseq->location.path)) { + int line = iseq->line_info_table ? FIX2INT(rb_iseq_first_lineno(iseq->self)) : 0; + rb_compile_warning(RSTRING_PTR(iseq->location.path), line, + "previous definition of %"PRIsVALUE" was here", + rb_id2str(old_def->original_id)); + } + } + + rb_unlink_method_entry(old_me); + } + + mid = SYM2ID(ID2SYM(mid)); + + me = ALLOC(rb_method_entry_t); + + rb_clear_method_cache_by_class(klass); + + me->flag = NOEX_WITH_SAFE(noex); + me->mark = 0; + me->called_id = mid; + RB_OBJ_WRITE(klass, &me->klass, defined_class); + me->def = def; + + if (def) { + def->alias_count++; + + switch(def->type) { + case VM_METHOD_TYPE_ISEQ: + RB_OBJ_WRITTEN(klass, Qundef, def->body.iseq->self); + break; + case VM_METHOD_TYPE_IVAR: + RB_OBJ_WRITTEN(klass, Qundef, def->body.attr.location); + break; + case VM_METHOD_TYPE_BMETHOD: + RB_OBJ_WRITTEN(klass, Qundef, def->body.proc); + break; + default:; + /* ignore */ + } + } + + /* check mid */ + if (klass == rb_cObject && mid == idInitialize) { + rb_warn("redefining Object#initialize may cause infinite loop"); + } + /* check mid */ + if (mid == object_id || mid == id__send__) { + if (type == VM_METHOD_TYPE_ISEQ && search_method(klass, mid, 0)) { + rb_warn("redefining `%s' may cause serious problems", rb_id2name(mid)); + } + } + + if (make_refined) { + make_method_entry_refined(me); + } + + st_insert(mtbl, mid, (st_data_t) me); + + return me; +} + +#define CALL_METHOD_HOOK(klass, hook, mid) do { \ + const VALUE arg = ID2SYM(mid); \ + VALUE recv_class = (klass); \ + ID hook_id = (hook); \ + if (FL_TEST((klass), FL_SINGLETON)) { \ + recv_class = rb_ivar_get((klass), attached); \ + hook_id = singleton_##hook; \ + } \ + rb_funcall2(recv_class, hook_id, 1, &arg); \ + } while (0) + +static void +method_added(VALUE klass, ID mid) +{ + if (ruby_running) { + CALL_METHOD_HOOK(klass, added, mid); + } +} + +static VALUE +(*call_cfunc_invoker_func(int argc))(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *) +{ + switch (argc) { + case -2: return &call_cfunc_m2; + case -1: return &call_cfunc_m1; + case 0: return &call_cfunc_0; + case 1: return &call_cfunc_1; + case 2: return &call_cfunc_2; + case 3: return &call_cfunc_3; + case 4: return &call_cfunc_4; + case 5: return &call_cfunc_5; + case 6: return &call_cfunc_6; + case 7: return &call_cfunc_7; + case 8: return &call_cfunc_8; + case 9: return &call_cfunc_9; + case 10: return &call_cfunc_10; + case 11: return &call_cfunc_11; + case 12: return &call_cfunc_12; + case 13: return &call_cfunc_13; + case 14: return &call_cfunc_14; + case 15: return &call_cfunc_15; + default: + rb_bug("call_cfunc_func: unsupported length: %d", argc); + } +} + +static void +setup_method_cfunc_struct(rb_method_cfunc_t *cfunc, VALUE (*func)(), int argc) +{ + cfunc->func = func; + cfunc->argc = argc; + cfunc->invoker = call_cfunc_invoker_func(argc); +} + +rb_method_entry_t * +rb_add_method(VALUE klass, ID mid, rb_method_type_t type, void *opts, rb_method_flag_t noex) +{ + rb_thread_t *th; + rb_control_frame_t *cfp; + int line; + rb_method_entry_t *me = rb_method_entry_make(klass, mid, type, 0, noex, klass); + rb_method_definition_t *def = ALLOC(rb_method_definition_t); + if (me->def && me->def->type == VM_METHOD_TYPE_REFINED) { + me->def->body.orig_me->def = def; + } + else { + me->def = def; + } + def->type = type; + def->original_id = mid; + def->alias_count = 0; + switch (type) { + case VM_METHOD_TYPE_ISEQ: { + rb_iseq_t *iseq = (rb_iseq_t *)opts; + *(rb_iseq_t **)&def->body.iseq = iseq; + RB_OBJ_WRITTEN(klass, Qundef, iseq->self); + break; + } + case VM_METHOD_TYPE_CFUNC: + { + rb_method_cfunc_t *cfunc = (rb_method_cfunc_t *)opts; + setup_method_cfunc_struct(&def->body.cfunc, cfunc->func, cfunc->argc); + } + break; + case VM_METHOD_TYPE_ATTRSET: + case VM_METHOD_TYPE_IVAR: + def->body.attr.id = (ID)(VALUE)opts; + RB_OBJ_WRITE(klass, &def->body.attr.location, Qfalse); + th = GET_THREAD(); + cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp); + if (cfp && (line = rb_vm_get_sourceline(cfp))) { + VALUE location = rb_ary_new3(2, cfp->iseq->location.path, INT2FIX(line)); + RB_OBJ_WRITE(klass, &def->body.attr.location, rb_ary_freeze(location)); + } + break; + case VM_METHOD_TYPE_BMETHOD: + RB_OBJ_WRITE(klass, &def->body.proc, (VALUE)opts); + break; + case VM_METHOD_TYPE_NOTIMPLEMENTED: + setup_method_cfunc_struct(&def->body.cfunc, rb_f_notimplement, -1); + break; + case VM_METHOD_TYPE_OPTIMIZED: + def->body.optimize_type = (enum method_optimized_type)opts; + break; + case VM_METHOD_TYPE_ZSUPER: + case VM_METHOD_TYPE_UNDEF: + break; + case VM_METHOD_TYPE_REFINED: + def->body.orig_me = (rb_method_entry_t *) opts; + break; + default: + rb_bug("rb_add_method: unsupported method type (%d)\n", type); + } + if (type != VM_METHOD_TYPE_UNDEF && type != VM_METHOD_TYPE_REFINED) { + method_added(klass, mid); + } + return me; +} + +static rb_method_entry_t * +method_entry_set(VALUE klass, ID mid, const rb_method_entry_t *me, + rb_method_flag_t noex, VALUE defined_class) +{ + rb_method_type_t type = me->def ? me->def->type : VM_METHOD_TYPE_UNDEF; + rb_method_entry_t *newme = rb_method_entry_make(klass, mid, type, me->def, noex, + defined_class); + method_added(klass, mid); + return newme; +} + +rb_method_entry_t * +rb_method_entry_set(VALUE klass, ID mid, const rb_method_entry_t *me, rb_method_flag_t noex) +{ + return method_entry_set(klass, mid, me, noex, klass); +} + +#define UNDEF_ALLOC_FUNC ((rb_alloc_func_t)-1) + +void +rb_define_alloc_func(VALUE klass, VALUE (*func)(VALUE)) +{ + Check_Type(klass, T_CLASS); + RCLASS_EXT(klass)->allocator = func; +} + +void +rb_undef_alloc_func(VALUE klass) +{ + rb_define_alloc_func(klass, UNDEF_ALLOC_FUNC); +} + +rb_alloc_func_t +rb_get_alloc_func(VALUE klass) +{ + Check_Type(klass, T_CLASS); + + for (; klass; klass = RCLASS_SUPER(klass)) { + rb_alloc_func_t allocator = RCLASS_EXT(klass)->allocator; + if (allocator == UNDEF_ALLOC_FUNC) break; + if (allocator) return allocator; + } + return 0; +} + +static inline rb_method_entry_t* +search_method(VALUE klass, ID id, VALUE *defined_class_ptr) +{ + rb_method_entry_t *me; + + for (me = 0; klass; klass = RCLASS_SUPER(klass)) { + if ((me = lookup_method_table(klass, id)) != 0) break; + } + + if (defined_class_ptr) + *defined_class_ptr = klass; + return me; +} + +rb_method_entry_t * +rb_method_entry_at(VALUE klass, ID id) +{ + return lookup_method_table(klass, id); +} + +/* + * search method entry without the method cache. + * + * if you need method entry with method cache (normal case), use + * rb_method_entry() simply. + */ +rb_method_entry_t * +rb_method_entry_get_without_cache(VALUE klass, ID id, + VALUE *defined_class_ptr) +{ + VALUE defined_class; + rb_method_entry_t *me = search_method(klass, id, &defined_class); + + if (me && me->klass) { + switch (BUILTIN_TYPE(me->klass)) { + case T_CLASS: + if (RBASIC(klass)->flags & FL_SINGLETON) break; + /* fall through */ + case T_ICLASS: + defined_class = me->klass; + } + } + + if (ruby_running) { + if (OPT_GLOBAL_METHOD_CACHE) { + struct cache_entry *ent; + ent = GLOBAL_METHOD_CACHE(klass, id); + ent->class_serial = RCLASS_SERIAL(klass); + ent->method_state = GET_GLOBAL_METHOD_STATE(); + ent->defined_class = defined_class; + ent->mid = id; + + if (UNDEFINED_METHOD_ENTRY_P(me)) { + ent->me = 0; + me = 0; + } + else { + ent->me = me; + } + } + else if (UNDEFINED_METHOD_ENTRY_P(me)) { + me = 0; + } + } + + if (defined_class_ptr) + *defined_class_ptr = defined_class; + return me; +} + +#if VM_DEBUG_VERIFY_METHOD_CACHE +static void +verify_method_cache(VALUE klass, ID id, VALUE defined_class, rb_method_entry_t *me) +{ + VALUE actual_defined_class; + rb_method_entry_t *actual_me = + rb_method_entry_get_without_cache(klass, id, &actual_defined_class); + + if (me != actual_me || defined_class != actual_defined_class) { + rb_bug("method cache verification failed"); + } +} +#endif + +rb_method_entry_t * +rb_method_entry(VALUE klass, ID id, VALUE *defined_class_ptr) +{ +#if OPT_GLOBAL_METHOD_CACHE + struct cache_entry *ent; + ent = GLOBAL_METHOD_CACHE(klass, id); + if (ent->method_state == GET_GLOBAL_METHOD_STATE() && + ent->class_serial == RCLASS_SERIAL(klass) && + ent->mid == id) { + if (defined_class_ptr) + *defined_class_ptr = ent->defined_class; +#if VM_DEBUG_VERIFY_METHOD_CACHE + verify_method_cache(klass, id, ent->defined_class, ent->me); +#endif + return ent->me; + } +#endif + + return rb_method_entry_get_without_cache(klass, id, defined_class_ptr); +} + +static rb_method_entry_t * +get_original_method_entry(VALUE refinements, + const rb_method_entry_t *me, + VALUE *defined_class_ptr) +{ + VALUE super; + + if (me->def->body.orig_me) { + return me->def->body.orig_me; + } + else if (!(super = RCLASS_SUPER(me->klass))) { + return 0; + } + else { + rb_method_entry_t *tmp_me; + tmp_me = rb_method_entry(super, me->called_id, + defined_class_ptr); + return rb_resolve_refined_method(refinements, tmp_me, + defined_class_ptr); + } +} + +rb_method_entry_t * +rb_resolve_refined_method(VALUE refinements, const rb_method_entry_t *me, + VALUE *defined_class_ptr) +{ + if (me && me->def->type == VM_METHOD_TYPE_REFINED) { + VALUE refinement; + rb_method_entry_t *tmp_me; + + refinement = find_refinement(refinements, me->klass); + if (NIL_P(refinement)) { + return get_original_method_entry(refinements, me, + defined_class_ptr); + } + tmp_me = rb_method_entry(refinement, me->called_id, + defined_class_ptr); + if (tmp_me && tmp_me->def->type != VM_METHOD_TYPE_REFINED) { + return tmp_me; + } + else { + return get_original_method_entry(refinements, me, + defined_class_ptr); + } + } + else { + return (rb_method_entry_t *)me; + } +} + +rb_method_entry_t * +rb_method_entry_with_refinements(VALUE klass, ID id, + VALUE *defined_class_ptr) +{ + VALUE defined_class; + rb_method_entry_t *me = rb_method_entry(klass, id, &defined_class); + + if (me && me->def->type == VM_METHOD_TYPE_REFINED) { + NODE *cref = rb_vm_cref(); + VALUE refinements = cref ? cref->nd_refinements : Qnil; + + me = rb_resolve_refined_method(refinements, me, &defined_class); + } + if (defined_class_ptr) + *defined_class_ptr = defined_class; + return me; +} + +rb_method_entry_t * +rb_method_entry_without_refinements(VALUE klass, ID id, + VALUE *defined_class_ptr) +{ + VALUE defined_class; + rb_method_entry_t *me = rb_method_entry(klass, id, &defined_class); + + if (me && me->def->type == VM_METHOD_TYPE_REFINED) { + me = rb_resolve_refined_method(Qnil, me, &defined_class); + } + if (defined_class_ptr) + *defined_class_ptr = defined_class; + if (UNDEFINED_METHOD_ENTRY_P(me)) { + return 0; + } + else { + return me; + } +} + +static void +remove_method(VALUE klass, ID mid) +{ + st_data_t key, data; + rb_method_entry_t *me = 0; + VALUE self = klass; + + klass = RCLASS_ORIGIN(klass); + rb_frozen_class_p(klass); + if (mid == object_id || mid == id__send__ || mid == idInitialize) { + rb_warn("removing `%s' may cause serious problems", rb_id2name(mid)); + } + + if (!st_lookup(RCLASS_M_TBL(klass), mid, &data) || + !(me = (rb_method_entry_t *)data) || + (!me->def || me->def->type == VM_METHOD_TYPE_UNDEF) || + UNDEFINED_REFINED_METHOD_P(me->def)) { + rb_name_error(mid, "method `%"PRIsVALUE"' not defined in %"PRIsVALUE, + rb_id2str(mid), rb_class_path(klass)); + } + + key = (st_data_t)mid; + st_delete(RCLASS_M_TBL(klass), &key, &data); + + rb_vm_check_redefinition_opt_method(me, klass); + rb_clear_method_cache_by_class(klass); + rb_unlink_method_entry(me); + + if (me->def->type == VM_METHOD_TYPE_REFINED) { + rb_add_refined_method_entry(klass, mid); + } + + CALL_METHOD_HOOK(self, removed, mid); +} + +void +rb_remove_method_id(VALUE klass, ID mid) +{ + remove_method(klass, mid); +} + +void +rb_remove_method(VALUE klass, const char *name) +{ + remove_method(klass, rb_intern(name)); +} + +/* + * call-seq: + * remove_method(symbol) -> self + * remove_method(string) -> self + * + * Removes the method identified by _symbol_ from the current + * class. For an example, see <code>Module.undef_method</code>. + * String arguments are converted to symbols. + */ + +static VALUE +rb_mod_remove_method(int argc, VALUE *argv, VALUE mod) +{ + int i; + + for (i = 0; i < argc; i++) { + VALUE v = argv[i]; + ID id = rb_check_id(&v); + if (!id) { + rb_name_error_str(v, "method `%"PRIsVALUE"' not defined in %"PRIsVALUE, + v, rb_obj_class(mod)); + } + remove_method(mod, id); + } + return mod; +} + +static void +rb_export_method(VALUE klass, ID name, rb_method_flag_t noex) +{ + rb_method_entry_t *me; + VALUE defined_class; + + me = search_method(klass, name, &defined_class); + if (!me && RB_TYPE_P(klass, T_MODULE)) { + me = search_method(rb_cObject, name, &defined_class); + } + + if (UNDEFINED_METHOD_ENTRY_P(me) || + UNDEFINED_REFINED_METHOD_P(me->def)) { + rb_print_undef(klass, name, 0); + } + + if (me->flag != noex) { + rb_vm_check_redefinition_opt_method(me, klass); + + if (klass == defined_class || + RCLASS_ORIGIN(klass) == defined_class) { + me->flag = noex; + if (me->def->type == VM_METHOD_TYPE_REFINED) { + me->def->body.orig_me->flag = noex; + } + rb_clear_method_cache_by_class(klass); + } + else { + rb_add_method(klass, name, VM_METHOD_TYPE_ZSUPER, 0, noex); + } + } +} + +int +rb_method_boundp(VALUE klass, ID id, int ex) +{ + rb_method_entry_t *me = + rb_method_entry_without_refinements(klass, id, 0); + + if (me != 0) { + if ((ex & ~NOEX_RESPONDS) && + ((me->flag & NOEX_PRIVATE) || + ((ex & NOEX_RESPONDS) && (me->flag & NOEX_PROTECTED)))) { + return 0; + } + if (!me->def) return 0; + if (me->def->type == VM_METHOD_TYPE_NOTIMPLEMENTED) { + if (ex & NOEX_RESPONDS) return 2; + return 0; + } + return 1; + } + return 0; +} + +extern ID rb_check_attr_id(ID id); + +void +rb_attr(VALUE klass, ID id, int read, int write, int ex) +{ + VALUE attriv; + VALUE aname; + rb_method_flag_t noex; + + if (!ex) { + noex = NOEX_PUBLIC; + } + else { + if (SCOPE_TEST(NOEX_PRIVATE)) { + noex = NOEX_PRIVATE; + rb_warning((SCOPE_CHECK(NOEX_MODFUNC)) ? + "attribute accessor as module_function" : + "private attribute?"); + } + else if (SCOPE_TEST(NOEX_PROTECTED)) { + noex = NOEX_PROTECTED; + } + else { + noex = NOEX_PUBLIC; + } + } + + aname = rb_id2str(rb_check_attr_id(id)); + if (NIL_P(aname)) { + rb_raise(rb_eArgError, "argument needs to be symbol or string"); + } + attriv = (VALUE)rb_intern_str(rb_sprintf("@%"PRIsVALUE, aname)); + if (read) { + rb_add_method(klass, id, VM_METHOD_TYPE_IVAR, (void *)attriv, noex); + } + if (write) { + rb_add_method(klass, rb_id_attrset(id), VM_METHOD_TYPE_ATTRSET, (void *)attriv, noex); + } +} + +void +rb_undef(VALUE klass, ID id) +{ + rb_method_entry_t *me; + + if (NIL_P(klass)) { + rb_raise(rb_eTypeError, "no class to undef method"); + } + rb_frozen_class_p(klass); + if (id == object_id || id == id__send__ || id == idInitialize) { + rb_warn("undefining `%s' may cause serious problems", rb_id2name(id)); + } + + me = search_method(klass, id, 0); + + if (UNDEFINED_METHOD_ENTRY_P(me) || + UNDEFINED_REFINED_METHOD_P(me->def)) { + const char *s0 = " class"; + VALUE c = klass; + + if (FL_TEST(c, FL_SINGLETON)) { + VALUE obj = rb_ivar_get(klass, attached); + + if (RB_TYPE_P(obj, T_MODULE) || RB_TYPE_P(obj, T_CLASS)) { + c = obj; + s0 = ""; + } + } + else if (RB_TYPE_P(c, T_MODULE)) { + s0 = " module"; + } + rb_name_error(id, "undefined method `%"PRIsVALUE"' for%s `%"PRIsVALUE"'", + QUOTE_ID(id), s0, rb_class_name(c)); + } + + rb_add_method(klass, id, VM_METHOD_TYPE_UNDEF, 0, NOEX_PUBLIC); + + CALL_METHOD_HOOK(klass, undefined, id); +} + +/* + * call-seq: + * undef_method(symbol) -> self + * undef_method(string) -> self + * + * Prevents the current class from responding to calls to the named + * method. Contrast this with <code>remove_method</code>, which deletes + * the method from the particular class; Ruby will still search + * superclasses and mixed-in modules for a possible receiver. + * String arguments are converted to symbols. + * + * class Parent + * def hello + * puts "In parent" + * end + * end + * class Child < Parent + * def hello + * puts "In child" + * end + * end + * + * + * c = Child.new + * c.hello + * + * + * class Child + * remove_method :hello # remove from child, still in parent + * end + * c.hello + * + * + * class Child + * undef_method :hello # prevent any calls to 'hello' + * end + * c.hello + * + * <em>produces:</em> + * + * In child + * In parent + * prog.rb:23: undefined method `hello' for #<Child:0x401b3bb4> (NoMethodError) + */ + +static VALUE +rb_mod_undef_method(int argc, VALUE *argv, VALUE mod) +{ + int i; + for (i = 0; i < argc; i++) { + VALUE v = argv[i]; + ID id = rb_check_id(&v); + if (!id) { + rb_method_name_error(mod, v); + } + rb_undef(mod, id); + } + return mod; +} + +/* + * call-seq: + * mod.method_defined?(symbol) -> true or false + * mod.method_defined?(string) -> true or false + * + * Returns +true+ if the named method is defined by + * _mod_ (or its included modules and, if _mod_ is a class, + * its ancestors). Public and protected methods are matched. + * String arguments are converted to symbols. + * + * module A + * def method1() end + * end + * class B + * def method2() end + * end + * class C < B + * include A + * def method3() end + * end + * + * A.method_defined? :method1 #=> true + * C.method_defined? "method1" #=> true + * C.method_defined? "method2" #=> true + * C.method_defined? "method3" #=> true + * C.method_defined? "method4" #=> false + */ + +static VALUE +rb_mod_method_defined(VALUE mod, VALUE mid) +{ + ID id = rb_check_id(&mid); + if (!id || !rb_method_boundp(mod, id, 1)) { + return Qfalse; + } + return Qtrue; + +} + +#define VISI_CHECK(x,f) (((x)&NOEX_MASK) == (f)) + +static VALUE +check_definition(VALUE mod, VALUE mid, rb_method_flag_t noex) +{ + const rb_method_entry_t *me; + ID id = rb_check_id(&mid); + if (!id) return Qfalse; + me = rb_method_entry_without_refinements(mod, id, 0); + if (me) { + if (VISI_CHECK(me->flag, noex)) + return Qtrue; + } + return Qfalse; +} + +/* + * call-seq: + * mod.public_method_defined?(symbol) -> true or false + * mod.public_method_defined?(string) -> true or false + * + * Returns +true+ if the named public method is defined by + * _mod_ (or its included modules and, if _mod_ is a class, + * its ancestors). + * String arguments are converted to symbols. + * + * module A + * def method1() end + * end + * class B + * protected + * def method2() end + * end + * class C < B + * include A + * def method3() end + * end + * + * A.method_defined? :method1 #=> true + * C.public_method_defined? "method1" #=> true + * C.public_method_defined? "method2" #=> false + * C.method_defined? "method2" #=> true + */ + +static VALUE +rb_mod_public_method_defined(VALUE mod, VALUE mid) +{ + return check_definition(mod, mid, NOEX_PUBLIC); +} + +/* + * call-seq: + * mod.private_method_defined?(symbol) -> true or false + * mod.private_method_defined?(string) -> true or false + * + * Returns +true+ if the named private method is defined by + * _ mod_ (or its included modules and, if _mod_ is a class, + * its ancestors). + * String arguments are converted to symbols. + * + * module A + * def method1() end + * end + * class B + * private + * def method2() end + * end + * class C < B + * include A + * def method3() end + * end + * + * A.method_defined? :method1 #=> true + * C.private_method_defined? "method1" #=> false + * C.private_method_defined? "method2" #=> true + * C.method_defined? "method2" #=> false + */ + +static VALUE +rb_mod_private_method_defined(VALUE mod, VALUE mid) +{ + return check_definition(mod, mid, NOEX_PRIVATE); +} + +/* + * call-seq: + * mod.protected_method_defined?(symbol) -> true or false + * mod.protected_method_defined?(string) -> true or false + * + * Returns +true+ if the named protected method is defined + * by _mod_ (or its included modules and, if _mod_ is a + * class, its ancestors). + * String arguments are converted to symbols. + * + * module A + * def method1() end + * end + * class B + * protected + * def method2() end + * end + * class C < B + * include A + * def method3() end + * end + * + * A.method_defined? :method1 #=> true + * C.protected_method_defined? "method1" #=> false + * C.protected_method_defined? "method2" #=> true + * C.method_defined? "method2" #=> true + */ + +static VALUE +rb_mod_protected_method_defined(VALUE mod, VALUE mid) +{ + return check_definition(mod, mid, NOEX_PROTECTED); +} + +int +rb_method_entry_eq(const rb_method_entry_t *m1, const rb_method_entry_t *m2) +{ + return rb_method_definition_eq(m1->def, m2->def); +} + +static int +rb_method_definition_eq(const rb_method_definition_t *d1, const rb_method_definition_t *d2) +{ + if (d1 && d1->type == VM_METHOD_TYPE_REFINED && d1->body.orig_me) + d1 = d1->body.orig_me->def; + if (d2 && d2->type == VM_METHOD_TYPE_REFINED && d2->body.orig_me) + d2 = d2->body.orig_me->def; + if (d1 == d2) return 1; + if (!d1 || !d2) return 0; + if (d1->type != d2->type) { + return 0; + } + switch (d1->type) { + case VM_METHOD_TYPE_ISEQ: + return d1->body.iseq == d2->body.iseq; + case VM_METHOD_TYPE_CFUNC: + return + d1->body.cfunc.func == d2->body.cfunc.func && + d1->body.cfunc.argc == d2->body.cfunc.argc; + case VM_METHOD_TYPE_ATTRSET: + case VM_METHOD_TYPE_IVAR: + return d1->body.attr.id == d2->body.attr.id; + case VM_METHOD_TYPE_BMETHOD: + return RTEST(rb_equal(d1->body.proc, d2->body.proc)); + case VM_METHOD_TYPE_MISSING: + return d1->original_id == d2->original_id; + case VM_METHOD_TYPE_ZSUPER: + case VM_METHOD_TYPE_NOTIMPLEMENTED: + case VM_METHOD_TYPE_UNDEF: + return 1; + case VM_METHOD_TYPE_OPTIMIZED: + return d1->body.optimize_type == d2->body.optimize_type; + default: + rb_bug("rb_method_entry_eq: unsupported method type (%d)\n", d1->type); + return 0; + } +} + +static st_index_t +rb_hash_method_definition(st_index_t hash, const rb_method_definition_t *def) +{ + again: + hash = rb_hash_uint(hash, def->type); + switch (def->type) { + case VM_METHOD_TYPE_ISEQ: + return rb_hash_uint(hash, (st_index_t)def->body.iseq); + case VM_METHOD_TYPE_CFUNC: + hash = rb_hash_uint(hash, (st_index_t)def->body.cfunc.func); + return rb_hash_uint(hash, def->body.cfunc.argc); + case VM_METHOD_TYPE_ATTRSET: + case VM_METHOD_TYPE_IVAR: + return rb_hash_uint(hash, def->body.attr.id); + case VM_METHOD_TYPE_BMETHOD: + return rb_hash_proc(hash, def->body.proc); + case VM_METHOD_TYPE_MISSING: + return rb_hash_uint(hash, def->original_id); + case VM_METHOD_TYPE_ZSUPER: + case VM_METHOD_TYPE_NOTIMPLEMENTED: + case VM_METHOD_TYPE_UNDEF: + return hash; + case VM_METHOD_TYPE_OPTIMIZED: + return rb_hash_uint(hash, def->body.optimize_type); + case VM_METHOD_TYPE_REFINED: + if (def->body.orig_me) { + def = def->body.orig_me->def; + goto again; + } + else { + return hash; + } + default: + rb_bug("rb_hash_method_definition: unsupported method type (%d)\n", def->type); + } + return hash; +} + +st_index_t +rb_hash_method_entry(st_index_t hash, const rb_method_entry_t *me) +{ + return rb_hash_method_definition(hash, me->def); +} + +void +rb_alias(VALUE klass, ID name, ID def) +{ + VALUE target_klass = klass; + VALUE defined_class; + rb_method_entry_t *orig_me; + rb_method_flag_t flag = NOEX_UNDEF; + + if (NIL_P(klass)) { + rb_raise(rb_eTypeError, "no class to make alias"); + } + + rb_frozen_class_p(klass); + + again: + orig_me = search_method(klass, def, &defined_class); + + if (UNDEFINED_METHOD_ENTRY_P(orig_me) || + UNDEFINED_REFINED_METHOD_P(orig_me->def)) { + if ((!RB_TYPE_P(klass, T_MODULE)) || + (orig_me = search_method(rb_cObject, def, 0), + UNDEFINED_METHOD_ENTRY_P(orig_me))) { + rb_print_undef(klass, def, 0); + } + } + if (orig_me->def->type == VM_METHOD_TYPE_ZSUPER) { + klass = RCLASS_SUPER(klass); + def = orig_me->def->original_id; + flag = orig_me->flag; + goto again; + } + if (RB_TYPE_P(defined_class, T_ICLASS)) { + VALUE real_class = RBASIC_CLASS(defined_class); + if (real_class && RCLASS_ORIGIN(real_class) == defined_class) + defined_class = real_class; + } + + if (flag == NOEX_UNDEF) flag = orig_me->flag; + method_entry_set(target_klass, name, orig_me, flag, defined_class); +} + +/* + * call-seq: + * alias_method(new_name, old_name) -> self + * + * Makes <i>new_name</i> a new copy of the method <i>old_name</i>. This can + * be used to retain access to methods that are overridden. + * + * module Mod + * alias_method :orig_exit, :exit + * def exit(code=0) + * puts "Exiting with code #{code}" + * orig_exit(code) + * end + * end + * include Mod + * exit(99) + * + * <em>produces:</em> + * + * Exiting with code 99 + */ + +static VALUE +rb_mod_alias_method(VALUE mod, VALUE newname, VALUE oldname) +{ + ID oldid = rb_check_id(&oldname); + if (!oldid) { + rb_print_undef_str(mod, oldname); + } + rb_alias(mod, rb_to_id(newname), oldid); + return mod; +} + +static void +set_method_visibility(VALUE self, int argc, const VALUE *argv, rb_method_flag_t ex) +{ + int i; + + if (argc == 0) { + rb_warning("%"PRIsVALUE" with no argument is just ignored", + QUOTE_ID(rb_frame_callee())); + return; + } + + for (i = 0; i < argc; i++) { + VALUE v = argv[i]; + ID id = rb_check_id(&v); + if (!id) { + rb_print_undef_str(self, v); + } + rb_export_method(self, id, ex); + } +} + +static VALUE +set_visibility(int argc, const VALUE *argv, VALUE module, rb_method_flag_t ex) +{ + if (argc == 0) { + SCOPE_SET(ex); + } + else { + set_method_visibility(module, argc, argv, ex); + } + return module; +} + +/* + * call-seq: + * public -> self + * public(symbol, ...) -> self + * public(string, ...) -> self + * + * With no arguments, sets the default visibility for subsequently + * defined methods to public. With arguments, sets the named methods to + * have public visibility. + * String arguments are converted to symbols. + */ + +static VALUE +rb_mod_public(int argc, VALUE *argv, VALUE module) +{ + return set_visibility(argc, argv, module, NOEX_PUBLIC); +} + +/* + * call-seq: + * protected -> self + * protected(symbol, ...) -> self + * protected(string, ...) -> self + * + * With no arguments, sets the default visibility for subsequently + * defined methods to protected. With arguments, sets the named methods + * to have protected visibility. + * String arguments are converted to symbols. + */ + +static VALUE +rb_mod_protected(int argc, VALUE *argv, VALUE module) +{ + return set_visibility(argc, argv, module, NOEX_PROTECTED); +} + +/* + * call-seq: + * private -> self + * private(symbol, ...) -> self + * private(string, ...) -> self + * + * With no arguments, sets the default visibility for subsequently + * defined methods to private. With arguments, sets the named methods + * to have private visibility. + * String arguments are converted to symbols. + * + * module Mod + * def a() end + * def b() end + * private + * def c() end + * private :a + * end + * Mod.private_instance_methods #=> [:a, :c] + */ + +static VALUE +rb_mod_private(int argc, VALUE *argv, VALUE module) +{ + return set_visibility(argc, argv, module, NOEX_PRIVATE); +} + +/* + * call-seq: + * mod.public_class_method(symbol, ...) -> mod + * mod.public_class_method(string, ...) -> mod + * + * Makes a list of existing class methods public. + * + * String arguments are converted to symbols. + */ + +static VALUE +rb_mod_public_method(int argc, VALUE *argv, VALUE obj) +{ + set_method_visibility(rb_singleton_class(obj), argc, argv, NOEX_PUBLIC); + return obj; +} + +/* + * call-seq: + * mod.private_class_method(symbol, ...) -> mod + * mod.private_class_method(string, ...) -> mod + * + * Makes existing class methods private. Often used to hide the default + * constructor <code>new</code>. + * + * String arguments are converted to symbols. + * + * class SimpleSingleton # Not thread safe + * private_class_method :new + * def SimpleSingleton.create(*args, &block) + * @me = new(*args, &block) if ! @me + * @me + * end + * end + */ + +static VALUE +rb_mod_private_method(int argc, VALUE *argv, VALUE obj) +{ + set_method_visibility(rb_singleton_class(obj), argc, argv, NOEX_PRIVATE); + return obj; +} + +/* + * call-seq: + * public + * public(symbol, ...) + * public(string, ...) + * + * With no arguments, sets the default visibility for subsequently + * defined methods to public. With arguments, sets the named methods to + * have public visibility. + * + * String arguments are converted to symbols. + */ + +static VALUE +top_public(int argc, VALUE *argv) +{ + return rb_mod_public(argc, argv, rb_cObject); +} + +/* + * call-seq: + * private + * private(symbol, ...) + * private(string, ...) + * + * With no arguments, sets the default visibility for subsequently + * defined methods to private. With arguments, sets the named methods to + * have private visibility. + * + * String arguments are converted to symbols. + */ +static VALUE +top_private(int argc, VALUE *argv) +{ + return rb_mod_private(argc, argv, rb_cObject); +} + +/* + * call-seq: + * module_function(symbol, ...) -> self + * module_function(string, ...) -> self + * + * Creates module functions for the named methods. These functions may + * be called with the module as a receiver, and also become available + * as instance methods to classes that mix in the module. Module + * functions are copies of the original, and so may be changed + * independently. The instance-method versions are made private. If + * used with no arguments, subsequently defined methods become module + * functions. + * String arguments are converted to symbols. + * + * module Mod + * def one + * "This is one" + * end + * module_function :one + * end + * class Cls + * include Mod + * def call_one + * one + * end + * end + * Mod.one #=> "This is one" + * c = Cls.new + * c.call_one #=> "This is one" + * module Mod + * def one + * "This is the new one" + * end + * end + * Mod.one #=> "This is one" + * c.call_one #=> "This is the new one" + */ + +static VALUE +rb_mod_modfunc(int argc, VALUE *argv, VALUE module) +{ + int i; + ID id; + const rb_method_entry_t *me; + + if (!RB_TYPE_P(module, T_MODULE)) { + rb_raise(rb_eTypeError, "module_function must be called for modules"); + } + + if (argc == 0) { + SCOPE_SET(NOEX_MODFUNC); + return module; + } + + set_method_visibility(module, argc, argv, NOEX_PRIVATE); + + for (i = 0; i < argc; i++) { + VALUE m = module; + + id = rb_to_id(argv[i]); + for (;;) { + me = search_method(m, id, 0); + if (me == 0) { + me = search_method(rb_cObject, id, 0); + } + if (UNDEFINED_METHOD_ENTRY_P(me)) { + rb_print_undef(module, id, 0); + } + if (me->def->type != VM_METHOD_TYPE_ZSUPER) { + break; /* normal case: need not to follow 'super' link */ + } + m = RCLASS_SUPER(m); + if (!m) + break; + } + rb_method_entry_set(rb_singleton_class(module), id, me, NOEX_PUBLIC); + } + return module; +} + +int +rb_method_basic_definition_p(VALUE klass, ID id) +{ + const rb_method_entry_t *me = rb_method_entry(klass, id, 0); + if (me && (me->flag & NOEX_BASIC)) + return 1; + return 0; +} + +static inline int +basic_obj_respond_to(VALUE obj, ID id, int pub) +{ + VALUE klass = CLASS_OF(obj); + VALUE args[2]; + + switch (rb_method_boundp(klass, id, pub|NOEX_RESPONDS)) { + case 2: + return FALSE; + case 0: + args[0] = ID2SYM(id); + args[1] = pub ? Qfalse : Qtrue; + return RTEST(rb_funcall2(obj, idRespond_to_missing, 2, args)); + default: + return TRUE; + } +} + +int +rb_obj_respond_to(VALUE obj, ID id, int priv) +{ + VALUE klass = CLASS_OF(obj); + + if (rb_method_basic_definition_p(klass, idRespond_to)) { + return basic_obj_respond_to(obj, id, !priv); + } + else { + int argc = 1; + VALUE args[2]; + args[0] = ID2SYM(id); + args[1] = Qtrue; + if (priv) { + if (rb_obj_method_arity(obj, idRespond_to) != 1) { + argc = 2; + } + else if (!NIL_P(ruby_verbose)) { + VALUE klass = CLASS_OF(obj); + VALUE location = rb_mod_method_location(klass, idRespond_to); + rb_warn("%"PRIsVALUE"%c""respond_to?(:%"PRIsVALUE") is" + " old fashion which takes only one parameter", + (FL_TEST(klass, FL_SINGLETON) ? obj : klass), + (FL_TEST(klass, FL_SINGLETON) ? '.' : '#'), + QUOTE_ID(id)); + if (!NIL_P(location)) { + VALUE path = RARRAY_AREF(location, 0); + VALUE line = RARRAY_AREF(location, 1); + if (!NIL_P(path)) { + rb_compile_warn(RSTRING_PTR(path), NUM2INT(line), + "respond_to? is defined here"); + } + } + } + } + return RTEST(rb_funcall2(obj, idRespond_to, argc, args)); + } +} + +int +rb_respond_to(VALUE obj, ID id) +{ + return rb_obj_respond_to(obj, id, FALSE); +} + + +/* + * call-seq: + * obj.respond_to?(symbol, include_all=false) -> true or false + * obj.respond_to?(string, include_all=false) -> true or false + * + * Returns +true+ if _obj_ responds to the given method. Private and + * protected methods are included in the search only if the optional + * second parameter evaluates to +true+. + * + * If the method is not implemented, + * as Process.fork on Windows, File.lchmod on GNU/Linux, etc., + * false is returned. + * + * If the method is not defined, <code>respond_to_missing?</code> + * method is called and the result is returned. + * + * When the method name parameter is given as a string, the string is + * converted to a symbol. + */ + +static VALUE +obj_respond_to(int argc, VALUE *argv, VALUE obj) +{ + VALUE mid, priv; + ID id; + + rb_scan_args(argc, argv, "11", &mid, &priv); + if (!(id = rb_check_id(&mid))) { + if (!rb_method_basic_definition_p(CLASS_OF(obj), idRespond_to_missing)) { + VALUE args[2]; + args[0] = rb_to_symbol(mid); + args[1] = priv; + return rb_funcall2(obj, idRespond_to_missing, 2, args); + } + return Qfalse; + } + if (basic_obj_respond_to(obj, id, !RTEST(priv))) + return Qtrue; + return Qfalse; +} + +/* + * call-seq: + * obj.respond_to_missing?(symbol, include_all) -> true or false + * obj.respond_to_missing?(string, include_all) -> true or false + * + * DO NOT USE THIS DIRECTLY. + * + * Hook method to return whether the _obj_ can respond to _id_ method + * or not. + * + * When the method name parameter is given as a string, the string is + * converted to a symbol. + * + * See #respond_to?, and the example of BasicObject. + */ +static VALUE +obj_respond_to_missing(VALUE obj, VALUE mid, VALUE priv) +{ + return Qfalse; +} + +void +Init_Method(void) +{ +#if OPT_GLOBAL_METHOD_CACHE + char *ptr = getenv("RUBY_GLOBAL_METHOD_CACHE_SIZE"); + int val; + + if (ptr != NULL && (val = atoi(ptr)) > 0) { + if ((val & (val - 1)) == 0) { /* ensure val is a power of 2 */ + global_method_cache.size = val; + global_method_cache.mask = val - 1; + } + else { + fprintf(stderr, "RUBY_GLOBAL_METHOD_CACHE_SIZE was set to %d but ignored because the value is not a power of 2.\n", val); + } + } + + global_method_cache.entries = (struct cache_entry *)calloc(global_method_cache.size, sizeof(struct cache_entry)); + if (global_method_cache.entries == NULL) { + fprintf(stderr, "[FATAL] failed to allocate memory\n"); + exit(EXIT_FAILURE); + } +#endif +} + +void +Init_eval_method(void) +{ +#undef rb_intern +#define rb_intern(str) rb_intern_const(str) + + rb_define_method(rb_mKernel, "respond_to?", obj_respond_to, -1); + rb_define_method(rb_mKernel, "respond_to_missing?", obj_respond_to_missing, 2); + + rb_define_private_method(rb_cModule, "remove_method", rb_mod_remove_method, -1); + rb_define_private_method(rb_cModule, "undef_method", rb_mod_undef_method, -1); + rb_define_private_method(rb_cModule, "alias_method", rb_mod_alias_method, 2); + rb_define_private_method(rb_cModule, "public", rb_mod_public, -1); + rb_define_private_method(rb_cModule, "protected", rb_mod_protected, -1); + rb_define_private_method(rb_cModule, "private", rb_mod_private, -1); + rb_define_private_method(rb_cModule, "module_function", rb_mod_modfunc, -1); + + rb_define_method(rb_cModule, "method_defined?", rb_mod_method_defined, 1); + rb_define_method(rb_cModule, "public_method_defined?", rb_mod_public_method_defined, 1); + rb_define_method(rb_cModule, "private_method_defined?", rb_mod_private_method_defined, 1); + rb_define_method(rb_cModule, "protected_method_defined?", rb_mod_protected_method_defined, 1); + rb_define_method(rb_cModule, "public_class_method", rb_mod_public_method, -1); + rb_define_method(rb_cModule, "private_class_method", rb_mod_private_method, -1); + + rb_define_private_method(rb_singleton_class(rb_vm_top_self()), + "public", top_public, -1); + rb_define_private_method(rb_singleton_class(rb_vm_top_self()), + "private", top_private, -1); + + { +#define REPLICATE_METHOD(klass, id, noex) \ + rb_method_entry_set((klass), (id), \ + rb_method_entry((klass), (id), 0), \ + (rb_method_flag_t)(noex | NOEX_BASIC | NOEX_NOREDEF)) + REPLICATE_METHOD(rb_eException, idMethodMissing, NOEX_PRIVATE); + REPLICATE_METHOD(rb_eException, idRespond_to, NOEX_PUBLIC); + REPLICATE_METHOD(rb_eException, idRespond_to_missing, NOEX_PUBLIC); + } +} |