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ruby--ruby/vm_method.c
nobu eeb39e0152 vm.c: prototype 
* vm.c (rb_next_class_sequence): use ANSI style definition and
  prorotype declaration, instead of old-K&R style.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42825 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2013-09-04 07:18:24 +00:00

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/*
* This file is included by vm.c
*/
#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__
#define ruby_running (GET_VM()->running)
/* int ruby_running = 0; */
static void
rb_class_clear_method_cache(VALUE klass)
{
RCLASS_EXT(klass)->seq = rb_next_class_sequence();
rb_class_foreach_subclass(klass, rb_class_clear_method_cache);
}
void
rb_clear_cache(void)
{
INC_VM_STATE_VERSION();
}
void
rb_clear_cache_by_class(VALUE klass)
{
if (klass && klass != Qundef) {
if (klass == rb_cBasicObject || klass == rb_cObject || klass == rb_mKernel) {
INC_VM_STATE_VERSION();
}
else {
rb_class_clear_method_cache(klass);
}
}
}
VALUE
rb_f_notimplement(int argc, 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) {
release_method_definition(def->body.orig_me->def);
xfree(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 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->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);
}
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)
{
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 &&
(mid == idInitialize || mid == idInitialize_copy ||
mid == idInitialize_clone || mid == idInitialize_dup ||
mid == idRespond_to_missing)) {
noex = NOEX_PRIVATE | noex;
}
rb_check_frozen(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 %s", rb_id2name(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 ? rb_iseq_first_lineno(iseq) : 0;
rb_compile_warning(RSTRING_PTR(iseq->location.path), line,
"previous definition of %s was here",
rb_id2name(old_def->original_id));
}
}
rb_unlink_method_entry(old_me);
}
me = ALLOC(rb_method_entry_t);
rb_clear_cache_by_class(klass);
me->flag = NOEX_WITH_SAFE(noex);
me->mark = 0;
me->called_id = mid;
me->klass = klass;
me->def = def;
if (def) {
def->alias_count++;
switch(def->type) {
case VM_METHOD_TYPE_ISEQ:
OBJ_WRITTEN(klass, Qundef, def->body.iseq);
break;
case VM_METHOD_TYPE_IVAR:
OBJ_WRITTEN(klass, Qundef, def->body.attr.location);
break;
case VM_METHOD_TYPE_BMETHOD:
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) {
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);
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;
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)opts;
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));
OBJ_WRITE(klass, &def->body.attr.location, rb_ary_freeze(location));
}
break;
case VM_METHOD_TYPE_BMETHOD:
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);
}
rb_clear_cache_by_class(klass);
return me;
}
rb_method_entry_t *
rb_method_entry_set(VALUE klass, ID mid, const rb_method_entry_t *me, rb_method_flag_t noex)
{
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);
method_added(klass, mid);
return newme;
}
#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,
method_cache_entry_t *ent)
{
VALUE defined_class;
rb_method_entry_t *me = search_method(klass, id, &defined_class);
if (ruby_running) {
ent->seq = RCLASS_EXT(klass)->seq;
ent->vm_state = GET_VM_STATE_VERSION();
if (UNDEFINED_METHOD_ENTRY_P(me)) {
ent->mid = id;
ent->me = 0;
ent->defined_class = defined_class;
me = 0;
}
else {
ent->mid = id;
ent->me = me;
ent->defined_class = defined_class;
}
}
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;
method_cache_entry_t ent;
rb_method_entry_t *actual_me =
rb_method_entry_get_without_cache(klass, id, &actual_defined_class, &ent);
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
method_cache_entry_t *ent;
if (RCLASS_EXT(klass)->mc_tbl == NULL) {
RCLASS_EXT(klass)->mc_tbl = st_init_numtable();
}
if (!st_lookup(RCLASS_EXT(klass)->mc_tbl, (st_index_t)id, (st_data_t *)&ent)) {
ent = calloc(1, sizeof(*ent));
st_insert(RCLASS_EXT(klass)->mc_tbl, (st_index_t)id, (st_data_t)ent);
}
if (ent->seq == RCLASS_EXT(klass)->seq &&
ent->vm_state == GET_VM_STATE_VERSION() &&
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;
}
#else
method_cache_entry_t ent_;
method_cache_entry_t* ent = &ent_;
#endif
return rb_method_entry_get_without_cache(klass, id, defined_class_ptr, ent);
}
static rb_method_entry_t *
get_original_method_entry(VALUE refinements,
rb_method_entry_t *me,
VALUE *defined_class_ptr)
{
if (me->def->body.orig_me) {
return me->def->body.orig_me;
}
else {
rb_method_entry_t *tmp_me;
tmp_me = rb_method_entry(RCLASS_SUPER(me->klass), 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, 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 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;
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_check_frozen(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)) {
rb_name_error(mid, "method `%s' not defined in %s",
rb_id2name(mid), rb_class2name(klass));
}
key = (st_data_t)mid;
st_delete(RCLASS_M_TBL(klass), &key, &data);
rb_vm_check_redefinition_opt_method(me, klass);
rb_clear_cache_by_class(klass);
rb_unlink_method_entry(me);
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 `%s' not defined in %s",
RSTRING_PTR(v), rb_class2name(mod));
}
remove_method(mod, id);
}
return mod;
}
#undef rb_disable_super
#undef rb_enable_super
void
rb_disable_super(VALUE klass, const char *name)
{
/* obsolete - no use */
}
void
rb_enable_super(VALUE klass, const char *name)
{
rb_warning("rb_enable_super() is obsolete");
}
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)) {
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;
}
}
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;
}
void
rb_attr(VALUE klass, ID id, int read, int write, int ex)
{
const char *name;
ID 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;
}
}
if (!rb_is_local_id(id) && !rb_is_const_id(id)) {
rb_name_error(id, "invalid attribute name `%s'", rb_id2name(id));
}
name = rb_id2name(id);
if (!name) {
rb_raise(rb_eArgError, "argument needs to be symbol or string");
}
aname = rb_sprintf("@%s", name);
rb_enc_copy(aname, rb_id2str(id));
attriv = rb_intern_str(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)) {
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(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 = d1->body.orig_me->def;
if (d2 && d2->type == VM_METHOD_TYPE_REFINED)
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;
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, 0);
if (UNDEFINED_METHOD_ENTRY_P(orig_me)) {
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 (flag == NOEX_UNDEF) flag = orig_me->flag;
rb_method_entry_set(target_klass, name, orig_me, flag);
rb_clear_cache_by_class(target_klass);
}
/*
* 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, 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);
}
rb_clear_cache_by_class(self);
}
static VALUE
set_visibility(int argc, 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, !RTEST(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] = ID2SYM(rb_to_id(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_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);
}
}
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