From 16d6bd7ece4c4b9b72f6bd51c9b034270b745525 Mon Sep 17 00:00:00 2001
From: Mica White <botahamec@outlook.com>
Date: Sun, 13 Sep 2026 15:12:08 -0400
Subject: Support no_std

---
 src/poisonable/error.rs      |  2 +-
 src/poisonable/flag.rs       |  2 +-
 src/poisonable/guard.rs      | 26 ++++++++++++++------------
 src/poisonable/poisonable.rs |  4 +++-
 4 files changed, 19 insertions(+), 15 deletions(-)

(limited to 'src/poisonable')

diff --git a/src/poisonable/error.rs b/src/poisonable/error.rs
index eed454b..b7b9206 100755
--- a/src/poisonable/error.rs
+++ b/src/poisonable/error.rs
@@ -1,5 +1,5 @@
+use core::error::Error;
 use core::fmt;
-use std::error::Error;
 
 use super::{PoisonError, PoisonGuard, TryLockPoisonableError};
 
diff --git a/src/poisonable/flag.rs b/src/poisonable/flag.rs
index 9186bbc..9877245 100755
--- a/src/poisonable/flag.rs
+++ b/src/poisonable/flag.rs
@@ -1,5 +1,5 @@
 #[cfg(panic = "unwind")]
-use std::sync::atomic::{AtomicBool, Ordering::Relaxed};
+use core::sync::atomic::{AtomicBool, Ordering::Relaxed};
 
 use super::PoisonFlag;
 
diff --git a/src/poisonable/guard.rs b/src/poisonable/guard.rs
index 32b4ee8..c4d9250 100755
--- a/src/poisonable/guard.rs
+++ b/src/poisonable/guard.rs
@@ -1,16 +1,18 @@
-use std::fmt::{Debug, Display};
-use std::hash::Hash;
-use std::marker::PhantomData;
-use std::ops::{Deref, DerefMut};
+use core::fmt::{Debug, Display};
+use core::hash::Hash;
+use core::marker::PhantomData;
+use core::ops::{Deref, DerefMut};
 
 use super::{PoisonFlag, PoisonGuard, PoisonRef};
 
 impl<'a, Guard> PoisonRef<'a, Guard> {
 	// This is used so that we don't keep accidentally adding the flag reference
+	#[allow(clippy::allow_attributes)]
+	#[allow(unused_variables)]
 	pub(super) const fn new(flag: &'a PoisonFlag, guard: Guard) -> Self {
 		Self {
 			guard,
-			#[cfg(panic = "unwind")]
+			#[cfg(all(feature = "std", panic = "unwind"))]
 			flag,
 			_phantom: PhantomData,
 		}
@@ -19,7 +21,7 @@ impl<'a, Guard> PoisonRef<'a, Guard> {
 
 impl<Guard> Drop for PoisonRef<'_, Guard> {
 	fn drop(&mut self) {
-		#[cfg(panic = "unwind")]
+		#[cfg(all(feature = "std", panic = "unwind"))]
 		if std::thread::panicking() {
 			self.flag.poison();
 		}
@@ -29,7 +31,7 @@ impl<Guard> Drop for PoisonRef<'_, Guard> {
 #[mutants::skip] // hashing involves RNG and is hard to test
 #[cfg(not(tarpaulin_include))]
 impl<Guard: Hash> Hash for PoisonRef<'_, Guard> {
-	fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+	fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
 		self.guard.hash(state)
 	}
 }
@@ -37,13 +39,13 @@ impl<Guard: Hash> Hash for PoisonRef<'_, Guard> {
 #[mutants::skip]
 #[cfg(not(tarpaulin_include))]
 impl<Guard: Debug> Debug for PoisonRef<'_, Guard> {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+	fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
 		Debug::fmt(&**self, f)
 	}
 }
 
 impl<Guard: Display> Display for PoisonRef<'_, Guard> {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+	fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
 		Display::fmt(&**self, f)
 	}
 }
@@ -77,7 +79,7 @@ impl<Guard> AsMut<Guard> for PoisonRef<'_, Guard> {
 #[mutants::skip] // hashing involves RNG and is hard to test
 #[cfg(not(tarpaulin_include))]
 impl<Guard: Hash> Hash for PoisonGuard<'_, Guard> {
-	fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+	fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
 		self.guard.hash(state)
 	}
 }
@@ -85,13 +87,13 @@ impl<Guard: Hash> Hash for PoisonGuard<'_, Guard> {
 #[mutants::skip]
 #[cfg(not(tarpaulin_include))]
 impl<Guard: Debug> Debug for PoisonGuard<'_, Guard> {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+	fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
 		Debug::fmt(&self.guard, f)
 	}
 }
 
 impl<Guard: Display> Display for PoisonGuard<'_, Guard> {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+	fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
 		Display::fmt(&self.guard, f)
 	}
 }
diff --git a/src/poisonable/poisonable.rs b/src/poisonable/poisonable.rs
index 0134ff1..ccca07e 100755
--- a/src/poisonable/poisonable.rs
+++ b/src/poisonable/poisonable.rs
@@ -1,4 +1,6 @@
-use std::panic::{RefUnwindSafe, UnwindSafe};
+use core::panic::{RefUnwindSafe, UnwindSafe};
+
+use alloc::vec::Vec;
 
 use crate::collection::OwnedLockCollection;
 use crate::handle_unwind::handle_unwind;
-- 
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