From f17b849da225d35746902783354ea544ab56f4b7 Mon Sep 17 00:00:00 2001
From: Mwa <mwa@mwaaa.fr>
Date: Tue, 17 Mar 2026 17:23:00 +0100
Subject: [PATCH] busy wait for macos

---
 simu/src/wait.rs | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 simu/src/wait.rs

diff --git a/simu/src/wait.rs b/simu/src/wait.rs
new file mode 100644
index 0000000..44dc885
--- /dev/null
+++ b/simu/src/wait.rs
@@ -0,0 +1,35 @@
+use std::sync::atomic::AtomicU32;
+
+#[cfg(feature = "futex")]
+use wait_on_address::AtomicWait;
+
+pub trait WaitOnAtomic {
+    fn wait(&self, v: u32);
+    fn signal(&self);
+}
+
+#[cfg(feature = "futex")]
+impl WaitOnAtomic for AtomicU32 {
+    fn wait(&self, v: u32) {
+        <AtomicU32 as AtomicWait>::wait(self, v);
+    }
+
+    fn signal(&self) {
+        self.notify_one();
+    }
+}
+
+#[cfg(not(feature = "futex"))]
+impl WaitOnAtomic for AtomicU32 {
+    fn wait(&self, v: u32) {
+        while self.load(std::sync::atomic::Ordering::Acquire) == v {
+            use std::{thread::sleep, time::Duration};
+
+            sleep(Duration::from_micros(500));
+        }
+    }
+
+    fn signal(&self) {
+        //
+    }
+}