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ruby--ruby/method.h
ko1 256c5f2577 * method.h: remove `VM_METHOD_TYPE_CFUNC_FRAMELESS' method type. 
This method type is for optimized CFUNC such as Fixnum#+ and so on.
  This feature is half-baked and no way to use them.
  [Background]
  Now, VM has opt_plus instructions to optimize `+' methods for
  some Classes (such as Fixnum, Float (flonum)). We call this
  type of instructions as `specialized instructions'.
  This simple technique improve simple program dramatically.
  However, we can make specialized instructions for only several
  types (classes) and selectors (method names) because a large
  instruction will be slow. In other words, this technique has no
  extensibility.
  To overcome this problem, VM_METHOD_TYPE_CFUNC_FRAMELESS was
  introduced (r37198). This type is a variant of CFUNC, but called
  their functiions directly without building a method frame.
  Any CFUNC method can be defined as frameless methods if a method
  is not needed to make method frame. Frameless methods are faster
  as specialized instructions (a bit slower, but no need to care).
  No problem described at
  http://charlie.bz/blog/why-do-singleton-methods-make-ruby-slow
  because this technique doesn't see class, but see method body
  itself. Alias is also no problem.
  [Problem]
  However, we can't set frameless method type for polymorphic methods
  such as Array#[]. Necessity for method frame depends on which
  parameter type. For example, Fixnum#+ needs method frame if
  coerce is needed. Current VM_METHOD_TYPE_CFUNC_FRAMELESS is not
  flexible and need more tuning to introduce it.
  Expected behavior of frameless method type may be:
  result = optimized_cfunc(params); /* call optimized cfunc */
  if (result == Qundef) { result = normal_cfunc(); }
  This is why I say this feature is half-baked.
  We need to learn primitive method in Smalltalk more.
  (I heard this name at RubyConf Taiwan this month. Thanks!)
  [Conclusion]
  Nobody may use this feature and there is no compatibility issue.
  This feature goes to next minor (2.1?).
* proc.c (rb_method_entry_arity): ditto.
* vm_eval.c, vm_insnhelper.c, vm_method.c: ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38431 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-12-17 22:04:12 +00:00

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/**********************************************************************
method.h -
$Author$
created at: Wed Jul 15 20:02:33 2009
Copyright (C) 2009 Koichi Sasada
**********************************************************************/
#ifndef METHOD_H
#define METHOD_H
#ifndef END_OF_ENUMERATION
# ifdef __GNUC__
# define END_OF_ENUMERATION(key)
# else
# define END_OF_ENUMERATION(key) END_OF_##key##_PLACEHOLDER = 0
# endif
#endif
typedef enum {
NOEX_PUBLIC = 0x00,
NOEX_NOSUPER = 0x01,
NOEX_PRIVATE = 0x02,
NOEX_PROTECTED = 0x04,
NOEX_MASK = 0x06,
NOEX_BASIC = 0x08,
NOEX_UNDEF = NOEX_NOSUPER,
NOEX_MODFUNC = 0x12,
NOEX_SUPER = 0x20,
NOEX_VCALL = 0x40,
NOEX_RESPONDS = 0x80,
NOEX_BIT_WIDTH = 8,
NOEX_SAFE_SHIFT_OFFSET = ((NOEX_BIT_WIDTH+3)/4)*4 /* round up to nibble */
} rb_method_flag_t;
#define NOEX_SAFE(n) ((int)((n) >> NOEX_SAFE_SHIFT_OFFSET) & 0x0F)
#define NOEX_WITH(n, s) (((s) << NOEX_SAFE_SHIFT_OFFSET) | (n) | (ruby_running ? 0 : NOEX_BASIC))
#define NOEX_WITH_SAFE(n) NOEX_WITH((n), rb_safe_level())
/* method data type */
typedef enum {
VM_METHOD_TYPE_ISEQ,
VM_METHOD_TYPE_CFUNC,
VM_METHOD_TYPE_ATTRSET,
VM_METHOD_TYPE_IVAR,
VM_METHOD_TYPE_BMETHOD,
VM_METHOD_TYPE_ZSUPER,
VM_METHOD_TYPE_UNDEF,
VM_METHOD_TYPE_NOTIMPLEMENTED,
VM_METHOD_TYPE_OPTIMIZED, /* Kernel#send, Proc#call, etc */
VM_METHOD_TYPE_MISSING, /* wrapper for method_missing(id) */
VM_METHOD_TYPE_REFINED,
END_OF_ENUMERATION(VM_METHOD_TYPE)
} rb_method_type_t;
struct rb_call_info_struct;
typedef struct rb_method_cfunc_struct {
VALUE (*func)(ANYARGS);
VALUE (*invoker)(VALUE (*func)(ANYARGS), VALUE recv, int argc, const VALUE *argv);
int argc;
} rb_method_cfunc_t;
typedef struct rb_method_attr_struct {
ID id;
VALUE location;
} rb_method_attr_t;
typedef struct rb_iseq_struct rb_iseq_t;
typedef struct rb_method_definition_struct {
rb_method_type_t type; /* method type */
ID original_id;
union {
rb_iseq_t *iseq; /* should be mark */
rb_method_cfunc_t cfunc;
rb_method_attr_t attr;
VALUE proc; /* should be mark */
enum method_optimized_type {
OPTIMIZED_METHOD_TYPE_SEND,
OPTIMIZED_METHOD_TYPE_CALL,
OPTIMIZED_METHOD_TYPE__MAX
} optimize_type;
struct rb_method_entry_struct *orig_me;
} body;
int alias_count;
} rb_method_definition_t;
typedef struct rb_method_entry_struct {
rb_method_flag_t flag;
char mark;
rb_method_definition_t *def;
ID called_id;
VALUE klass; /* should be mark */
} rb_method_entry_t;
struct unlinked_method_entry_list_entry {
struct unlinked_method_entry_list_entry *next;
rb_method_entry_t *me;
};
#define UNDEFINED_METHOD_ENTRY_P(me) (!(me) || !(me)->def || (me)->def->type == VM_METHOD_TYPE_UNDEF)
void rb_add_method_cfunc(VALUE klass, ID mid, VALUE (*func)(ANYARGS), int argc, rb_method_flag_t noex);
rb_method_entry_t *rb_add_method(VALUE klass, ID mid, rb_method_type_t type, void *option, rb_method_flag_t noex);
rb_method_entry_t *rb_method_entry(VALUE klass, ID id, VALUE *define_class_ptr);
void rb_add_refined_method_entry(VALUE refined_class, ID mid);
rb_method_entry_t *rb_resolve_refined_method(VALUE refinements,
rb_method_entry_t *me,
VALUE *defined_class_ptr);
rb_method_entry_t *rb_method_entry_with_refinements(VALUE klass, ID id,
VALUE *defined_class_ptr);
rb_method_entry_t *rb_method_entry_without_refinements(VALUE klass, ID id,
VALUE *defined_class_ptr);
rb_method_entry_t *rb_method_entry_get_without_cache(VALUE klass, ID id, VALUE *define_class_ptr);
rb_method_entry_t *rb_method_entry_set(VALUE klass, ID mid, const rb_method_entry_t *, rb_method_flag_t noex);
int rb_method_entry_arity(const rb_method_entry_t *me);
int rb_method_entry_eq(const rb_method_entry_t *m1, const rb_method_entry_t *m2);
st_index_t rb_hash_method_entry(st_index_t hash, const rb_method_entry_t *me);
void rb_mark_method_entry(const rb_method_entry_t *me);
void rb_free_method_entry(rb_method_entry_t *me);
void rb_sweep_method_entry(void *vm);
void rb_free_m_table(st_table *tbl);
#endif /* METHOD_H */
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