From 4d5abbe232b786359659dc1c3a717e1557fa4751 Mon Sep 17 00:00:00 2001
From: Vincent Ambo <mail@tazj.in>
Date: Fri, 16 Aug 2024 14:11:55 +0300
Subject: feat(tazjin/german-string): add Drop impl for transient strings

All of these strings are currently transient (the storage class is not yet
represented anywhere), and the ones that are heap allocated need to be
deallocated when the transient string dies.

Change-Id: Iba0ca926df5db7594f304c5d5318db9d69c6f42c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12235
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
---
 users/tazjin/german-string/src/lib.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/users/tazjin/german-string/src/lib.rs b/users/tazjin/german-string/src/lib.rs
index c35cb3ad4464..813cd5b1e515 100644
--- a/users/tazjin/german-string/src/lib.rs
+++ b/users/tazjin/german-string/src/lib.rs
@@ -65,4 +65,21 @@ impl GermanString {
             GermanString(GSRepr { large })
         }
     }
+
+    fn len(&self) -> usize {
+        // SAFETY: The length field is located in the same location for both
+        // variants, reading it from either is safe.
+        unsafe { self.0.small.len as usize }
+    }
+}
+
+impl Drop for GermanString {
+    fn drop(&mut self) {
+        if self.len() > 12 {
+            let layout = Layout::array::<u8>(self.len()).unwrap();
+            unsafe {
+                std::alloc::dealloc(self.0.large.data, layout);
+            }
+        }
+    }
 }
-- 
cgit 1.4.1