Add free function (lune-org#243)

crates/lune-std-ffi/Cargo.toml

@@ -15,8 +15,9 @@ workspace = true
 [dependencies]
 mlua = { version = "0.9.9", features = ["luau"] }
 mlua-sys = { version = "0.6.2", features = ["luau"] }
-num = "0.3.1"
-dlopen2 = "0.6"
+num = "0.4.3"
+dlopen2 = "0.7.0"
+libc = "0.2.162"
 
 libffi = "3.2.0"
 

crates/lune-std-ffi/src/lib.rs

@@ -1,5 +1,8 @@
 #![allow(clippy::cargo_common_metadata)]
 
+use std::ffi::c_void;
+
+use libc::free;
 use lune_utils::TableBuilder;
 use mlua::prelude::*;
 
@@ -9,7 +12,7 @@ mod ffi;
 
 use crate::{
     c::{export_c, export_fixed_types},
-    data::{create_nullref, BoxData, LibData},
+    data::{create_nullref, BoxData, GetFfiData, LibData},
 };
 
 /**
@@ -25,6 +28,10 @@ pub fn module(lua: &Lua) -> LuaResult<LuaTable> {
         .with_function("box", |_lua, size: usize| Ok(BoxData::new(size)))?
         .with_function("open", |_lua, name: String| LibData::new(name))?
         .with_function("isInteger", |_lua, num: LuaValue| Ok(num.is_integer()))?
+        .with_function("free", |_lua, data: LuaAnyUserData| {
+            unsafe { free(data.get_ffi_data()?.get_inner_pointer().cast::<c_void>()) };
+            Ok(())
+        })?
         .with_values(export_fixed_types(lua)?)?
         .with_value("c", export_c(lua)?)?;
 

types/ffi.luau

@@ -1129,4 +1129,15 @@ function ffi.isInteger<T>(val: T): boolean
 	return nil :: any
 end
 
+--[=[
+	@within FFI
+
+	Free referenced memory.
+
+	@param data Target memory to free
+]=]
+function ffi.free(data: RefData | BoxData)
+	return nil :: any
+end
+
 return ffi