From bb6f25d010dd9f227ab89fc03c1f913d407ed922 Mon Sep 17 00:00:00 2001
From: Dario Nieuwenhuis <dirbaio@dirbaio.net>
Date: Wed, 30 Dec 2020 01:06:05 +0100
Subject: [PATCH] Remove use of deprecated compare_and_swap.

---
 embassy-macros/src/lib.rs   | 2 +-
 embassy/src/executor/mod.rs | 4 ++--
 embassy/src/util/forever.rs | 6 +++++-
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/embassy-macros/src/lib.rs b/embassy-macros/src/lib.rs
index 091e08cf..c2e2d9e2 100644
--- a/embassy-macros/src/lib.rs
+++ b/embassy-macros/src/lib.rs
@@ -150,7 +150,7 @@ pub fn interrupt_take(item: TokenStream) -> TokenStream {
 
             static TAKEN: ::core::sync::atomic::AtomicBool = ::core::sync::atomic::AtomicBool::new(false);
 
-            if TAKEN.compare_and_swap(false, true, ::core::sync::atomic::Ordering::AcqRel) {
+            if TAKEN.compare_exchange(false, true, ::core::sync::atomic::Ordering::AcqRel, ::core::sync::atomic::Ordering::Acquire).is_err() {
                 panic!("IRQ Already taken");
             }
 
diff --git a/embassy/src/executor/mod.rs b/embassy/src/executor/mod.rs
index 845d94c2..facd71d1 100644
--- a/embassy/src/executor/mod.rs
+++ b/embassy/src/executor/mod.rs
@@ -105,8 +105,8 @@ impl<F: Future + 'static> Task<F> {
             if task
                 .header
                 .state
-                .compare_and_swap(0, state, Ordering::AcqRel)
-                == 0
+                .compare_exchange(0, state, Ordering::AcqRel, Ordering::Acquire)
+                .is_ok()
             {
                 // Initialize the task
                 task.header.poll_fn.write(Self::poll);
diff --git a/embassy/src/util/forever.rs b/embassy/src/util/forever.rs
index 80dc0eda..b1bfd166 100644
--- a/embassy/src/util/forever.rs
+++ b/embassy/src/util/forever.rs
@@ -19,7 +19,11 @@ impl<T> Forever<T> {
     }
 
     pub fn put(&'static self, val: T) -> &'static mut T {
-        if self.used.compare_and_swap(false, true, Ordering::SeqCst) {
+        if self
+            .used
+            .compare_exchange(false, true, Ordering::AcqRel, Ordering::Acquire)
+            .is_ok()
+        {
             panic!("Forever.put() called multiple times");
         }