1 unstable release
0.1.0 | Apr 14, 2019 |
---|
#41 in #bitflags
11KB
206 lines
atomic_bitfield
Atomic Bitfield
Provides a bitfield abstraction for the core atomic types. This crate is no_std
compatible
by default, and does not itself use any unsafe
code.
Note: On stable
this crate assumes the presence of the following atomics
which may cause compilation to fail on certain platforms.
Atomic{U,I}32
and smallerAtomic{U,I}size
Atomic{U,I}64
on 64 bit platforms
The nightly
feature of this crate enables target_has_atomic
and uses
that instead to detect which atomic types are available.
Usage Example
use core::sync::atomic::{AtomicU8, Ordering::Relaxed};
use atomic_bitfield::AtomicBitField as _;
let flags = AtomicU8::new(0b1000);
let prev_state = flags.set_bit(0, Relaxed);
assert_eq!(prev_state, false);
assert_eq!(flags.load(Relaxed), 0b1001);
let prev_state = flags.toggle_bit(3, Relaxed);
assert_eq!(prev_state, true);
assert_eq!(flags.load(Relaxed), 0b0001);
let prev_state = flags.swap_bit(0, false, Relaxed);
assert_eq!(prev_state, true);
assert_eq!(flags.load(Relaxed), 0b0000);
License: MIT
Dependencies
~37KB