From b879abc418475a375065c2156ef46c9c1aeaff80 Mon Sep 17 00:00:00 2001
From: Alex Orlenko <zxteam@protonmail.com>
Date: Tue, 24 Oct 2023 23:57:11 +0100
Subject: Add lua_newuserdata_t helper to mlua-sys/luau

---
 mlua-sys/src/luau/lua.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'mlua-sys')

diff --git a/mlua-sys/src/luau/lua.rs b/mlua-sys/src/luau/lua.rs
index 596db0c..996f62e 100644
--- a/mlua-sys/src/luau/lua.rs
+++ b/mlua-sys/src/luau/lua.rs
@@ -2,7 +2,7 @@
 
 use std::marker::{PhantomData, PhantomPinned};
 use std::os::raw::{c_char, c_double, c_float, c_int, c_uint, c_void};
-use std::ptr;
+use std::{mem, ptr};
 
 // Option for multiple returns in 'lua_pcall' and 'lua_call'
 pub const LUA_MULTRET: c_int = -1;
@@ -326,6 +326,15 @@ pub unsafe fn lua_newuserdata(L: *mut lua_State, sz: usize) -> *mut c_void {
     lua_newuserdatatagged(L, sz, 0)
 }
 
+#[inline(always)]
+pub unsafe fn lua_newuserdata_t<T>(L: *mut lua_State) -> *mut T {
+    unsafe extern "C-unwind" fn destructor<T>(ud: *mut c_void) {
+        ptr::drop_in_place(ud as *mut T);
+    }
+
+    lua_newuserdatadtor(L, mem::size_of::<T>(), destructor::<T>) as *mut T
+}
+
 // TODO: lua_strlen
 
 #[inline(always)]
-- 
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