rb_w32_asynchronize  553 include/ruby/win32.h uintptr_t rb_w32_asynchronize(asynchronous_func_t func, uintptr_t self, int argc, uintptr_t* argv, uintptr_t intrval);
rb_w32_asynchronize  347 win32/win32.c      return rb_w32_asynchronize(locker,