1 files changed, 13 insertions, 1 deletions
diff --git a/crates/utils/src/lib.rs b/crates/utils/src/lib.rs
index 6e26317..c6681d9 100644
--- a/crates/utils/src/lib.rs
+++ b/crates/utils/src/lib.rs
@@ -23,7 +23,7 @@ pub fn debug(f: impl Fn(&mut fmt::Formatter) -> fmt::Result) -> impl fmt::Debug
 /// A hint that this branch is unlikely to be called.
 #[cold]
 #[inline(always)]
-fn cold() {}
+pub fn cold() {}
 
 /// A hint that `b` is likely to be true. See `core::intrinsics::likely`.
 #[inline(always)]
@@ -130,3 +130,15 @@ macro_rules! impl_FromEndianBytes {
 }
 
 impl_FromEndianBytes!(i8, i16, i32, i64, isize, u8, u16, u32, u64, usize);
+
+/// Runs the body block the first time it is encountered.
+#[macro_export]
+macro_rules! first_time {
+    ($($stmt:stmt);*) => {{
+        use core::cell::LazyCell;
+        static LAZY_CELL = LazyCell::new(|| {
+            $($stmt);*
+        });
+        let _: &() = core::cell::LazyCell::force(&LAZY_CELL);
+    }};
+}