From f63205a695131db5df00c6f14f6be80b5e72cfe8 Mon Sep 17 00:00:00 2001
From: Benedikt Reinartz <filmor@gmail.com>
Date: Mon, 19 Feb 2024 21:34:10 +0100
Subject: [PATCH] Add alignment

---
 rustler/src/alloc.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/rustler/src/alloc.rs b/rustler/src/alloc.rs
index 92099a92..d58d3b7a 100644
--- a/rustler/src/alloc.rs
+++ b/rustler/src/alloc.rs
@@ -10,7 +10,10 @@ pub struct EnifAllocator;
 
 unsafe impl GlobalAlloc for EnifAllocator {
     unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
-        // TODO: Check the requested alignment.
+        // TODO: Check enif_alloc's real alignment
+        if layout.align() > (((((layout.size()) - 1) / 8) + 1) * 8) {
+            return std::ptr::null_mut();
+        }
         rustler_sys::enif_alloc(layout.size()) as *mut u8
     }