Add check for if a shard_amount is a power of two. (#186)

Signed-off-by: Leo Lu <[email protected]>
xacrimon · Mar 1, 2022 · 23f3d04 · 23f3d04
1 parent 6321c88
commit 23f3d04
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/lib.rs b/src/lib.rs
@@ -250,6 +250,7 @@ impl<'a, K: 'a + Eq + Hash, V: 'a, S: BuildHasher + Clone> DashMap<K, V, S> {
         shard_amount: usize,
     ) -> Self {
         assert!(shard_amount > 0);
+        assert!(shard_amount.is_power_of_two());
 
         let shift = util::ptr_size_bits() - ncb(shard_amount);