// LEAF routines do not lock, GC or throw exceptions

#define __LEAF(result_type, header)                                  \

  {- -------------------------------------------
  (1) (トレース出力)
      ---------------------------------------- -}

      TRACE_CALL(result_type, header)                                    \

  {- -------------------------------------------
  (1) (変数宣言など)
      ---------------------------------------- -}

      debug_only(NoHandleMark __hm;)                                     \

  {- -------------------------------------------
  (1) (以降で, 実際の関数の処理が行われる)
      ---------------------------------------- -}

      /* begin of body */