From 45c39685b56a4dba1b71bdbbbe5f731c3c77dc50 Mon Sep 17 00:00:00 2001
From: chrysn <chrysn@fsfe.org>
Date: Fri, 13 Sep 2024 12:47:37 +0200
Subject: [PATCH] Use portable-atomic

This should not have run-time impact on platforms that support atomic
boolean compare-and-swap, but enables its use on microcontrollers where
the user configures portable-atomic in such a way that atomics can be
emulated (eg. through disabling interrupts).
---
 Cargo.toml | 1 +
 src/lib.rs | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index 9fe3c62..3395074 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,3 +12,4 @@ documentation = "https://docs.rs/try-lock"
 readme = "README.md"
 
 [dependencies]
+portable-atomic = { version = "1.3.0", default-features = false, features = ["require-cas"] }
diff --git a/src/lib.rs b/src/lib.rs
index 2811996..7186d44 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -46,10 +46,13 @@
 #[cfg(test)]
 extern crate core;
 
+extern crate portable_atomic;
+
 use core::cell::UnsafeCell;
 use core::fmt;
 use core::ops::{Deref, DerefMut};
-use core::sync::atomic::{AtomicBool, Ordering};
+use portable_atomic::AtomicBool;
+use core::sync::atomic::Ordering;
 use core::marker::PhantomData;
 
 /// A light-weight lock guarded by an atomic boolean.