From d8eababd8b016c32219a5208235c59a3663adf75 Mon Sep 17 00:00:00 2001
From: Elias Rohrer <dev@tnull.de>
Date: Sat, 16 Dec 2023 13:39:22 +0100
Subject: [PATCH] Drop unused `sync` module from `lightning-invoice`

---
 lightning-invoice/src/lib.rs  |  4 ----
 lightning-invoice/src/sync.rs | 37 -----------------------------------
 2 files changed, 41 deletions(-)
 delete mode 100644 lightning-invoice/src/sync.rs

diff --git a/lightning-invoice/src/lib.rs b/lightning-invoice/src/lib.rs
index 690bf5764..59622a84a 100644
--- a/lightning-invoice/src/lib.rs
+++ b/lightning-invoice/src/lib.rs
@@ -92,10 +92,6 @@ mod prelude {
 
 use crate::prelude::*;
 
-/// Sync compat for std/no_std
-#[cfg(not(feature = "std"))]
-mod sync;
-
 /// Errors that indicate what is wrong with the invoice. They have some granularity for debug
 /// reasons, but should generally result in an "invalid BOLT11 invoice" message for the user.
 #[allow(missing_docs)]
diff --git a/lightning-invoice/src/sync.rs b/lightning-invoice/src/sync.rs
deleted file mode 100644
index fae923feb..000000000
--- a/lightning-invoice/src/sync.rs
+++ /dev/null
@@ -1,37 +0,0 @@
-use core::cell::{RefCell, RefMut};
-use core::ops::{Deref, DerefMut};
-
-pub type LockResult<Guard> = Result<Guard, ()>;
-
-pub struct Mutex<T: ?Sized> {
-	inner: RefCell<T>
-}
-
-#[must_use = "if unused the Mutex will immediately unlock"]
-pub struct MutexGuard<'a, T: ?Sized + 'a> {
-	lock: RefMut<'a, T>,
-}
-
-impl<T: ?Sized> Deref for MutexGuard<'_, T> {
-	type Target = T;
-
-	fn deref(&self) -> &T {
-		&self.lock.deref()
-	}
-}
-
-impl<T: ?Sized> DerefMut for MutexGuard<'_, T> {
-	fn deref_mut(&mut self) -> &mut T {
-		self.lock.deref_mut()
-	}
-}
-
-impl<T> Mutex<T> {
-	pub fn new(inner: T) -> Mutex<T> {
-		Mutex { inner: RefCell::new(inner) }
-	}
-
-	pub fn lock<'a>(&'a self) -> LockResult<MutexGuard<'a, T>> {
-		Ok(MutexGuard { lock: self.inner.borrow_mut() })
-	}
-}
-- 
2.39.5