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Remove registered_userdata_mt check

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This commit is contained in:
Alex Orlenko 2021-02-22 20:38:36 +00:00
parent 94670e3fdb
commit 7332c6a28c
1 changed files with 10 additions and 21 deletions
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31
src/lua.rs
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@ -1,6 +1,6 @@
use std::any::TypeId;
use std::cell::{RefCell, UnsafeCell};
use std::collections::{HashMap, HashSet};
use std::collections::HashMap;
use std::ffi::CString;
use std::marker::PhantomData;
use std::os::raw::{c_char, c_int, c_void};
@ -57,7 +57,6 @@ pub struct Lua {
// Data associated with the lua_State.
struct ExtraData {
registered_userdata: HashMap<TypeId, c_int>,
registered_userdata_mt: HashSet<isize>,
registry_unref_list: Arc<Mutex<Option<Vec<c_int>>>>,
libs: StdLib,
@ -322,7 +321,6 @@ impl Lua {
let extra = Arc::new(Mutex::new(ExtraData {
registered_userdata: HashMap::new(),
registered_userdata_mt: HashSet::new(),
registry_unref_list: Arc::new(Mutex::new(Some(Vec::new()))),
ref_thread,
libs: StdLib::NONE,
@ -1561,20 +1559,17 @@ impl Lua {
ffi::lua_pop(self.state, 1);
}
let (ptr, id) = protect_lua_closure(self.state, 1, 0, |state| {
let ptr = ffi::lua_topointer(state, -1) as isize;
let id = ffi::luaL_ref(state, ffi::LUA_REGISTRYINDEX);
(ptr, id)
let id = protect_lua_closure(self.state, 1, 0, |state| {
ffi::luaL_ref(state, ffi::LUA_REGISTRYINDEX)
})?;
let mut extra = mlua_expect!(self.extra.lock(), "extra is poisoned");
extra.registered_userdata.insert(type_id, id);
extra.registered_userdata_mt.insert(ptr);
Ok(id)
}
// Pushes a LuaRef value onto the stack, checking that it's any registered userdata
// Pushes a LuaRef value onto the stack, checking that it's not destructed
// Uses 2 stack spaces, does not call checkstack
#[cfg(feature = "serialize")]
pub(crate) unsafe fn push_userdata_ref(&self, lref: &LuaRef) -> Result<()> {
@ -1582,19 +1577,13 @@ impl Lua {
if ffi::lua_getmetatable(self.state, -1) == 0 {
Err(Error::UserDataTypeMismatch)
} else {
// Check that this is our metatable
let ptr = ffi::lua_topointer(self.state, -1) as isize;
let extra = mlua_expect!(self.extra.lock(), "extra is poisoned");
if !extra.registered_userdata_mt.contains(&ptr) {
// Maybe UserData destructed?
get_destructed_userdata_metatable(self.state);
if ffi::lua_rawequal(self.state, -1, -2) == 1 {
Err(Error::UserDataDestructed)
} else {
Err(Error::UserDataTypeMismatch)
}
// Check that userdata is not destructed
get_destructed_userdata_metatable(self.state);
let eq = ffi::lua_rawequal(self.state, -1, -2) == 1;
ffi::lua_pop(self.state, 2);
if eq {
Err(Error::UserDataDestructed)
} else {
ffi::lua_pop(self.state, 1);
Ok(())
}
}