| // Copyright 2020 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #![allow(clippy::bad_bit_mask)] // TODO(fxbug.dev/95084) |
| |
| use static_assertions::const_assert; |
| |
| pub(crate) const IS_LOCKED: usize = 1usize.rotate_right(1); |
| pub(crate) const HAS_WAITERS: usize = 1usize.rotate_right(2); |
| |
| pub(crate) const SENTINEL: usize = !(IS_LOCKED | HAS_WAITERS); |
| |
| const_assert!(SENTINEL | IS_LOCKED != SENTINEL); |
| const_assert!(SENTINEL | HAS_WAITERS != SENTINEL); |
