From 5c3cedf69ad07cb8522a0b040bdbf1f9ca4cf37b Mon Sep 17 00:00:00 2001
From: Emil Fresk <emil.fresk@gmail.com>
Date: Wed, 4 Jan 2023 20:29:16 +0100
Subject: Fix fences

---
 macros/src/codegen/async_dispatchers.rs | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'macros/src/codegen/async_dispatchers.rs')

diff --git a/macros/src/codegen/async_dispatchers.rs b/macros/src/codegen/async_dispatchers.rs
index aa854d7..c811665 100644
--- a/macros/src/codegen/async_dispatchers.rs
+++ b/macros/src/codegen/async_dispatchers.rs
@@ -101,7 +101,12 @@ pub fn codegen(app: &App, analysis: &Analysis) -> Vec<TokenStream2> {
                 const PRIORITY: u8 = #level;
 
                 rtic::export::run(PRIORITY, || {
+                    // Have the acquire/release semantics outside the checks to no overdo it
+                    core::sync::atomic::fence(core::sync::atomic::Ordering::Acquire);
+
                     #(#stmts)*
+
+                    core::sync::atomic::fence(core::sync::atomic::Ordering::Release);
                 });
             }
         ));
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