fix: make sure we don't start playing around sound if one is already playing

src/sound.rs

@@ -1,5 +1,6 @@
-use std::sync::mpsc;
+use std::sync::atomic::{AtomicBool, Ordering};
-use std::thread;
+use std::sync::{LazyLock, mpsc};
+
 use std::time::Duration;
 
 use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
@@ -12,14 +13,21 @@ const NOTE_2_DURATION_SECS: f32 = 0.25;
 const TOTAL_CHIME_DURATION_SECS: f32 = NOTE_1_DURATION_SECS + NOTE_2_DURATION_SECS;
 const CHIME_VOLUME_GAIN: f32 = 0.25;
 
+static SOUND_BUSY: LazyLock<AtomicBool> = LazyLock::new(|| AtomicBool::new(false));
+
 pub fn play_notification_sound() {
-  thread::spawn(move || {
+  if SOUND_BUSY.swap(true, Ordering::AcqRel) {
-    // term bell fallback
+    return;
+  }
+
+  std::thread::spawn(move || {
+    // term bell fall back
     print!("\x07");
 
     let _ = std::io::Write::flush(&mut std::io::stdout());
-
     let _ = play_audio_chime();
+
+    SOUND_BUSY.store(false, Ordering::Release);
   });
 }