moved the Rc<RefCell<>> back into FatFs

fat-bits/src/bpb.rs

@@ -236,6 +236,7 @@ impl Bpb {
         if self.fat_type() == FatType::Fat32 {
             return None;
         }
+
         Some(self.fat_offset() + self.sector_to_offset(self.num_fats() as u32 * self.fat_size()))
     }
 

fat-bits/src/lib.rs

@@ -98,8 +98,15 @@ pub struct FatFs {
     fat: fat::Fat,
 }
 
+unsafe impl Send for FatFs {}
+
 impl FatFs {
-    pub fn load(data: Rc<RefCell<dyn SliceLike>>) -> anyhow::Result<FatFs> {
+    pub fn load<S>(data: S) -> anyhow::Result<FatFs>
+    where
+        S: SliceLike + Send + 'static,
+    {
+        let data = Rc::new(RefCell::new(data));
+
         let mut bpb_bytes = [0; 512];
 
         data.borrow_mut().read_at_offset(0, &mut bpb_bytes)?;