Move hook_proc under `Lua::set_hook` to use callback_error_ext

src/hook.rs

@@ -3,9 +3,8 @@ use std::ffi::CStr;
 use std::ops::{BitOr, BitOrAssign};
 use std::os::raw::{c_char, c_int};
 
-use crate::ffi::{self, lua_Debug, lua_State};
+use crate::ffi::{self, lua_Debug};
 use crate::lua::Lua;
-use crate::util::callback_error;
 
 /// Contains information about currently executing Lua code.
 ///
@@ -283,22 +282,6 @@ impl BitOrAssign for HookTriggers {
     }
 }
 
-pub(crate) unsafe extern "C" fn hook_proc(state: *mut lua_State, ar: *mut lua_Debug) {
-    callback_error(state, |_| {
-        let lua = mlua_expect!(Lua::make_from_ptr(state), "cannot make Lua instance");
-        let debug = Debug::new(&lua, ar);
-        let hook_cb = mlua_expect!(lua.hook_callback(), "no hook callback set in hook_proc");
-
-        #[allow(clippy::match_wild_err_arm)]
-        match hook_cb.try_borrow_mut() {
-            Ok(mut b) => (&mut *b)(&lua, debug),
-            Err(_) => mlua_panic!("Lua should not allow hooks to be called within another hook"),
-        }?;
-
-        Ok(())
-    })
-}
-
 unsafe fn ptr_to_str<'a>(input: *const c_char) -> Option<&'a [u8]> {
     if input.is_null() {
         None

src/lua.rs

@@ -14,7 +14,7 @@ use rustc_hash::FxHashMap;
 use crate::error::{Error, Result};
 use crate::ffi;
 use crate::function::Function;
-use crate::hook::{hook_proc, Debug, HookTriggers};
+use crate::hook::{Debug, HookTriggers};
 use crate::scope::Scope;
 use crate::stdlib::StdLib;
 use crate::string::String;
@@ -765,9 +765,32 @@ impl Lua {
     where
         F: 'static + MaybeSend + FnMut(&Lua, Debug) -> Result<()>,
     {
+        unsafe extern "C" fn hook_proc(state: *mut ffi::lua_State, ar: *mut ffi::lua_Debug) {
+            let lua = match Lua::make_from_ptr(state) {
+                Some(lua) => lua,
+                None => return,
+            };
+            let extra = lua.extra.get();
+            callback_error_ext(state, extra, move |_| {
+                let debug = Debug::new(&lua, ar);
+                let hook_cb = (*lua.extra.get()).hook_callback.clone();
+                let hook_cb = mlua_expect!(hook_cb, "no hook callback set in hook_proc");
+
+                #[allow(clippy::match_wild_err_arm)]
+                match hook_cb.try_lock() {
+                    Ok(mut cb) => cb(&lua, debug),
+                    Err(_) => {
+                        mlua_panic!("Lua should not allow hooks to be called within another hook")
+                    }
+                }?;
+
+                Ok(())
+            })
+        }
+
         let state = self.main_state.ok_or(Error::MainThreadNotAvailable)?;
         unsafe {
-            (*self.extra.get()).hook_callback = Some(Arc::new(RefCell::new(callback)));
+            (*self.extra.get()).hook_callback = Some(Arc::new(Mutex::new(callback)));
             ffi::lua_sethook(state, Some(hook_proc), triggers.mask(), triggers.count());
         }
         Ok(())
@@ -805,7 +828,7 @@ impl Lua {
             callback_error_ext(state, extra, move |_| {
                 let cb = mlua_expect!(
                     (*lua.extra.get()).warn_callback.as_ref(),
-                    "no warning callback set"
+                    "no warning callback set in warn_proc"
                 );
                 let msg = CStr::from_ptr(msg);
                 cb(&lua, msg, tocont != 0)
@@ -2468,10 +2491,6 @@ impl Lua {
         })
     }
 
-    pub(crate) unsafe fn hook_callback(&self) -> Option<HookCallback> {
-        (*self.extra.get()).hook_callback.clone()
-    }
-
     #[inline]
     pub(crate) fn new_or_cached_multivalue(&self) -> MultiValue {
         unsafe {

src/types.rs

@@ -1,4 +1,3 @@
-use std::cell::RefCell;
 use std::hash::{Hash, Hasher};
 use std::os::raw::{c_int, c_void};
 use std::sync::{Arc, Mutex};
@@ -51,10 +50,10 @@ pub(crate) struct AsyncPollUpvalue<'lua> {
 }
 
 #[cfg(feature = "send")]
-pub(crate) type HookCallback = Arc<RefCell<dyn FnMut(&Lua, Debug) -> Result<()> + Send>>;
+pub(crate) type HookCallback = Arc<Mutex<dyn FnMut(&Lua, Debug) -> Result<()> + Send>>;
 
 #[cfg(not(feature = "send"))]
-pub(crate) type HookCallback = Arc<RefCell<dyn FnMut(&Lua, Debug) -> Result<()>>>;
+pub(crate) type HookCallback = Arc<Mutex<dyn FnMut(&Lua, Debug) -> Result<()>>>;
 
 #[cfg(all(feature = "send", feature = "lua54"))]
 pub(crate) type WarnCallback = Box<dyn Fn(&Lua, &CStr, bool) -> Result<()> + Send>;