/* * call-seq: * ObjectSpace._id2ref(object_id) -> an_object * * Converts an object id to a reference to the object. May not be * called on an object id passed as a parameter to a finalizer. * * s = "I am a string" #=> "I am a string" * r = ObjectSpace._id2ref(s.object_id) #=> "I am a string" * r == s #=> true * */ static VALUE id2ref(obj, id) VALUE obj, id; { unsigned long ptr, p0; rb_secure(4); p0 = ptr = NUM2ULONG(id); if (ptr == Qtrue) return Qtrue; if (ptr == Qfalse) return Qfalse; if (ptr == Qnil) return Qnil; if (FIXNUM_P(ptr)) return (VALUE)ptr; if (SYMBOL_P(ptr) && rb_id2name(SYM2ID((VALUE)ptr)) != 0) { return (VALUE)ptr; } ptr = id ^ FIXNUM_FLAG; /* unset FIXNUM_FLAG */ if (!is_pointer_to_heap((void *)ptr)|| BUILTIN_TYPE(ptr) >= T_BLKTAG) { rb_raise(rb_eRangeError, "0x%lx is not id value", p0); } if (BUILTIN_TYPE(ptr) == 0 || RBASIC(ptr)->klass == 0) { rb_raise(rb_eRangeError, "0x%lx is recycled object", p0); } return (VALUE)ptr; }