diff --git a/src/lib.rs b/src/lib.rs
index eda363d..9bedb0e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1 +1,2 @@
 pub mod macros;
+pub mod types;
diff --git a/src/types.rs b/src/types.rs
new file mode 100644
index 0000000..0ad7c1c
--- /dev/null
+++ b/src/types.rs
@@ -0,0 +1,21 @@
+#[derive(Debug)]
+pub struct CounterU32 {
+    v: u32,
+}
+
+impl CounterU32 {
+    #[inline(always)]
+    pub fn new() -> Self {
+        Self { v: 0 }
+    }
+
+    #[inline(always)]
+    pub fn inc(&mut self) {
+        self.v += 1
+    }
+
+    #[inline(always)]
+    pub fn ingest(&mut self, rhs: Self) {
+        self.v += rhs.v
+    }
+}