Move away from metatable hashmap cache to direct keys
This commit is contained in:
parent
84fe5f7f76
commit
adbc9ccc9b
73
src/lua.rs
73
src/lua.rs
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@ -27,10 +27,10 @@ use crate::userdata::{
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};
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};
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use crate::util::{
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use crate::util::{
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self, assert_stack, callback_error, check_stack, get_destructed_userdata_metatable,
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self, assert_stack, callback_error, check_stack, get_destructed_userdata_metatable,
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get_gc_metatable_for, get_gc_userdata, get_main_state, get_userdata, get_wrapped_error,
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get_gc_metatable, get_gc_userdata, get_main_state, get_userdata, get_wrapped_error,
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init_error_registry, init_gc_metatable_for, init_userdata_metatable, pop_error,
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init_error_registry, init_gc_metatable, init_userdata_metatable, pop_error, push_gc_userdata,
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push_gc_userdata, push_string, push_table, push_userdata, push_wrapped_error, rawset_field,
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push_string, push_table, push_userdata, push_wrapped_error, rawset_field, safe_pcall,
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safe_pcall, safe_xpcall, StackGuard, WrappedError, WrappedPanic,
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safe_xpcall, StackGuard, WrappedError, WrappedPanic, WRAPPED_ERROR_MT, WRAPPED_PANIC_MT,
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};
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};
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use crate::value::{FromLua, FromLuaMulti, MultiValue, Nil, ToLua, ToLuaMulti, Value};
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use crate::value::{FromLua, FromLuaMulti, MultiValue, Nil, ToLua, ToLuaMulti, Value};
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@ -148,11 +148,24 @@ impl LuaOptions {
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}
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}
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}
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}
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static CALLBACK_MT: u8 = 0;
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static CALLBACK_UPVALUE_MT: u8 = 0;
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static EXTRA_MT: u8 = 0;
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pub(crate) static EXTRA_REGISTRY_KEY: u8 = 0;
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#[cfg(feature = "async")]
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#[cfg(feature = "async")]
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pub(crate) static ASYNC_POLL_PENDING: u8 = 0;
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static ASYNC_CALLBACK_MT: u8 = 0;
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#[cfg(feature = "async")]
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static ASYNC_CALLBACK_UPVALUE_MT: u8 = 0;
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#[cfg(feature = "async")]
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static ASYNC_POLL_UPVALUE_MT: u8 = 0;
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#[cfg(feature = "async")]
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pub(crate) static WAKER_MT: u8 = 0;
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#[cfg(feature = "async")]
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#[cfg(feature = "async")]
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pub(crate) static WAKER_REGISTRY_KEY: u8 = 0;
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pub(crate) static WAKER_REGISTRY_KEY: u8 = 0;
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pub(crate) static EXTRA_REGISTRY_KEY: u8 = 0;
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#[cfg(feature = "async")]
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pub(crate) static ASYNC_POLL_PENDING: u8 = 0;
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/// Requires `feature = "send"`
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/// Requires `feature = "send"`
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#[cfg(feature = "send")]
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#[cfg(feature = "send")]
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@ -396,18 +409,19 @@ impl Lua {
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// Create the internal metatables and place them in the registry
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// Create the internal metatables and place them in the registry
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// to prevent them from being garbage collected.
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// to prevent them from being garbage collected.
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init_gc_metatable_for::<Callback>(state, None)?;
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init_gc_metatable::<Callback>(state, &CALLBACK_MT, None)?;
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init_gc_metatable_for::<CallbackUpvalue>(state, None)?;
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init_gc_metatable::<CallbackUpvalue>(state, &CALLBACK_UPVALUE_MT, None)?;
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init_gc_metatable_for::<Weak<Mutex<ExtraData>>>(state, None)?;
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init_gc_metatable::<Weak<Mutex<ExtraData>>>(state, &EXTRA_MT, None)?;
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#[cfg(feature = "async")]
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#[cfg(feature = "async")]
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{
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{
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init_gc_metatable_for::<AsyncCallback>(state, None)?;
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init_gc_metatable::<AsyncCallback>(state, &ASYNC_CALLBACK_MT, None)?;
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init_gc_metatable_for::<AsyncCallbackUpvalue>(state, None)?;
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#[rustfmt::skip]
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init_gc_metatable_for::<AsyncPollUpvalue>(state, None)?;
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init_gc_metatable::<AsyncCallbackUpvalue>(state, &ASYNC_CALLBACK_UPVALUE_MT, None)?;
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init_gc_metatable_for::<Option<Waker>>(state, None)?;
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init_gc_metatable::<AsyncPollUpvalue>(state, &ASYNC_POLL_UPVALUE_MT, None)?;
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init_gc_metatable::<Option<Waker>>(state, &WAKER_MT, None)?;
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// Create empty Waker slot
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// Create empty Waker slot
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push_gc_userdata::<Option<Waker>>(state, None)?;
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push_gc_userdata::<Option<Waker>>(state, &WAKER_MT, None)?;
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protect_lua!(state, 1, 0, state => {
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protect_lua!(state, 1, 0, state => {
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let waker_key = &WAKER_REGISTRY_KEY as *const u8 as *const c_void;
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let waker_key = &WAKER_REGISTRY_KEY as *const u8 as *const c_void;
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ffi::lua_rawsetp(state, ffi::LUA_REGISTRYINDEX, waker_key);
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ffi::lua_rawsetp(state, ffi::LUA_REGISTRYINDEX, waker_key);
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@ -450,7 +464,7 @@ impl Lua {
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}));
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}));
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mlua_expect!(
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mlua_expect!(
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push_gc_userdata(main_state, Arc::downgrade(&extra)),
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push_gc_userdata(main_state, &EXTRA_MT, Arc::downgrade(&extra)),
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"Error while storing extra data",
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"Error while storing extra data",
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);
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);
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mlua_expect!(
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mlua_expect!(
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@ -1612,7 +1626,9 @@ impl Lua {
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let err = err.clone();
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let err = err.clone();
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ffi::lua_pop(state, 1);
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ffi::lua_pop(state, 1);
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Value::Error(err)
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Value::Error(err)
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} else if let Some(panic) = get_gc_userdata::<WrappedPanic>(state, -1).as_mut() {
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} else if let Some(panic) =
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get_gc_userdata::<WrappedPanic>(state, -1, &WRAPPED_PANIC_MT).as_mut()
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{
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if let Some(panic) = (*panic).0.take() {
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if let Some(panic) = (*panic).0.take() {
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ffi::lua_pop(state, 1);
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ffi::lua_pop(state, 1);
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resume_unwind(panic);
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resume_unwind(panic);
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@ -1877,8 +1893,12 @@ impl Lua {
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check_stack(self.state, 4)?;
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check_stack(self.state, 4)?;
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let lua = self.clone();
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let lua = self.clone();
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let func = mem::transmute(func);
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push_gc_userdata(
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push_gc_userdata(self.state, CallbackUpvalue { lua, func })?;
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self.state,
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&CALLBACK_UPVALUE_MT,
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CallbackUpvalue { lua, func },
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)?;
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protect_lua!(self.state, 1, 1, state => {
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protect_lua!(self.state, 1, 1, state => {
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ffi::lua_pushcclosure(state, call_callback, 1);
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ffi::lua_pushcclosure(state, call_callback, 1);
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})?;
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})?;
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@ -1930,7 +1950,7 @@ impl Lua {
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let fut = ((*upvalue).func)(lua, args);
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let fut = ((*upvalue).func)(lua, args);
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let lua = lua.clone();
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let lua = lua.clone();
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push_gc_userdata(state, AsyncPollUpvalue { lua, fut })?;
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push_gc_userdata(state, &ASYNC_POLL_UPVALUE_MT, AsyncPollUpvalue { lua, fut })?;
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protect_lua!(state, 1, 1, state => {
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protect_lua!(state, 1, 1, state => {
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ffi::lua_pushcclosure(state, poll_future, 1);
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ffi::lua_pushcclosure(state, poll_future, 1);
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})?;
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})?;
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@ -1961,7 +1981,7 @@ impl Lua {
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// Try to get an outer poll waker
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// Try to get an outer poll waker
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let waker_key = &WAKER_REGISTRY_KEY as *const u8 as *const c_void;
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let waker_key = &WAKER_REGISTRY_KEY as *const u8 as *const c_void;
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ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, waker_key);
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ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, waker_key);
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let waker = match get_gc_userdata::<Option<Waker>>(state, -1).as_ref() {
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let waker = match get_gc_userdata::<Option<Waker>>(state, -1, &WAKER_MT).as_ref() {
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Some(Some(waker)) => waker.clone(),
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Some(Some(waker)) => waker.clone(),
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_ => noop_waker(),
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_ => noop_waker(),
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};
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};
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@ -1995,8 +2015,11 @@ impl Lua {
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check_stack(self.state, 4)?;
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check_stack(self.state, 4)?;
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let lua = self.clone();
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let lua = self.clone();
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let func = mem::transmute(func);
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push_gc_userdata(
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push_gc_userdata(self.state, AsyncCallbackUpvalue { lua, func })?;
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self.state,
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&ASYNC_CALLBACK_UPVALUE_MT,
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AsyncCallbackUpvalue { lua, func },
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)?;
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protect_lua!(self.state, 1, 1, state => {
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protect_lua!(self.state, 1, 1, state => {
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ffi::lua_pushcclosure(state, call_callback, 1);
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ffi::lua_pushcclosure(state, call_callback, 1);
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})?;
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})?;
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@ -2104,7 +2127,7 @@ impl Lua {
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return None;
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return None;
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}
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}
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let extra = mlua_expect!(
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let extra = mlua_expect!(
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(*get_gc_userdata::<Weak<Mutex<ExtraData>>>(state, -1)).upgrade(),
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(*get_gc_userdata::<Weak<Mutex<ExtraData>>>(state, -1, &EXTRA_MT)).upgrade(),
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"extra is destroyed"
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"extra is destroyed"
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);
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);
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ffi::lua_pop(state, 1);
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ffi::lua_pop(state, 1);
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@ -2437,7 +2460,7 @@ where
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Ok(Err(err)) => {
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Ok(Err(err)) => {
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let wrapped_error = get_prealloc_err() as *mut WrappedError;
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let wrapped_error = get_prealloc_err() as *mut WrappedError;
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ptr::write(wrapped_error, WrappedError(err));
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ptr::write(wrapped_error, WrappedError(err));
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get_gc_metatable_for::<WrappedError>(state);
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get_gc_metatable(state, &WRAPPED_ERROR_MT);
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ffi::lua_setmetatable(state, -2);
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ffi::lua_setmetatable(state, -2);
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// Convert to CallbackError and attach traceback
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// Convert to CallbackError and attach traceback
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@ -2457,7 +2480,7 @@ where
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Err(p) => {
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Err(p) => {
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let wrapped_panic = get_prealloc_err() as *mut WrappedPanic;
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let wrapped_panic = get_prealloc_err() as *mut WrappedPanic;
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ptr::write(wrapped_panic, WrappedPanic(Some(p)));
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ptr::write(wrapped_panic, WrappedPanic(Some(p)));
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get_gc_metatable_for::<WrappedPanic>(state);
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get_gc_metatable(state, &WRAPPED_PANIC_MT);
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ffi::lua_setmetatable(state, -2);
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ffi::lua_setmetatable(state, -2);
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ffi::lua_error(state)
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ffi::lua_error(state)
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}
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}
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@ -13,7 +13,7 @@ use crate::function::Function;
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#[cfg(feature = "async")]
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#[cfg(feature = "async")]
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use {
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use {
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crate::{
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crate::{
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lua::{ASYNC_POLL_PENDING, WAKER_REGISTRY_KEY},
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lua::{ASYNC_POLL_PENDING, WAKER_MT, WAKER_REGISTRY_KEY},
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util::get_gc_userdata,
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util::get_gc_userdata,
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value::Value,
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value::Value,
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},
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},
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@ -362,7 +362,7 @@ impl WakerGuard {
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let waker_key = &WAKER_REGISTRY_KEY as *const u8 as *const c_void;
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let waker_key = &WAKER_REGISTRY_KEY as *const u8 as *const c_void;
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ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, waker_key);
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ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, waker_key);
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let waker_slot = get_gc_userdata::<Option<Waker>>(state, -1).as_mut();
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let waker_slot = get_gc_userdata::<Option<Waker>>(state, -1, &WAKER_MT).as_mut();
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let old = mlua_expect!(waker_slot, "Waker is destroyed").replace(waker);
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let old = mlua_expect!(waker_slot, "Waker is destroyed").replace(waker);
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Ok(WakerGuard(state, old))
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Ok(WakerGuard(state, old))
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@ -380,7 +380,7 @@ impl Drop for WakerGuard {
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let waker_key = &WAKER_REGISTRY_KEY as *const u8 as *const c_void;
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let waker_key = &WAKER_REGISTRY_KEY as *const u8 as *const c_void;
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ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, waker_key);
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ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, waker_key);
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let waker_slot = get_gc_userdata::<Option<Waker>>(state, -1).as_mut();
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let waker_slot = get_gc_userdata::<Option<Waker>>(state, -1, &WAKER_MT).as_mut();
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mem::swap(mlua_expect!(waker_slot, "Waker is destroyed"), &mut self.1);
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mem::swap(mlua_expect!(waker_slot, "Waker is destroyed"), &mut self.1);
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}
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}
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}
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}
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101
src/util.rs
101
src/util.rs
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@ -1,21 +1,18 @@
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use std::any::{Any, TypeId};
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use std::any::Any;
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use std::collections::HashMap;
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use std::error::Error as StdError;
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use std::error::Error as StdError;
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use std::fmt::Write;
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use std::fmt::Write;
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use std::os::raw::{c_char, c_int, c_void};
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use std::os::raw::{c_char, c_int, c_void};
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use std::panic::{catch_unwind, resume_unwind, AssertUnwindSafe};
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use std::panic::{catch_unwind, resume_unwind, AssertUnwindSafe};
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use std::sync::{Arc, Mutex};
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use std::sync::Arc;
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use std::{mem, ptr, slice};
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use std::{mem, ptr, slice};
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use once_cell::sync::Lazy;
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use crate::error::{Error, Result};
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use crate::error::{Error, Result};
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use crate::ffi;
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use crate::ffi;
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static METATABLE_CACHE: Lazy<Mutex<HashMap<TypeId, u8>>> = Lazy::new(|| {
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pub(crate) static WRAPPED_ERROR_MT: u8 = 0;
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// The capacity must(!) be greater than number of stored keys
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pub(crate) static WRAPPED_PANIC_MT: u8 = 0;
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Mutex::new(HashMap::with_capacity(32))
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static DESTRUCTED_USERDATA_MT: u8 = 0;
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});
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static ERROR_PRINT_BUFFER_KEY: u8 = 0;
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// Checks that Lua has enough free stack space for future stack operations. On failure, this will
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// Checks that Lua has enough free stack space for future stack operations. On failure, this will
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// panic with an internal error message.
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// panic with an internal error message.
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@ -199,7 +196,9 @@ pub unsafe fn pop_error(state: *mut ffi::lua_State, err_code: c_int) -> Error {
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if let Some(err) = get_wrapped_error(state, -1).as_ref() {
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if let Some(err) = get_wrapped_error(state, -1).as_ref() {
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ffi::lua_pop(state, 1);
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ffi::lua_pop(state, 1);
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err.clone()
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err.clone()
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} else if let Some(panic) = get_gc_userdata::<WrappedPanic>(state, -1).as_mut() {
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} else if let Some(panic) =
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get_gc_userdata::<WrappedPanic>(state, -1, &WRAPPED_PANIC_MT).as_mut()
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{
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if let Some(p) = (*panic).0.take() {
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if let Some(p) = (*panic).0.take() {
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resume_unwind(p);
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resume_unwind(p);
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} else {
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} else {
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@ -298,20 +297,24 @@ pub unsafe fn take_userdata<T>(state: *mut ffi::lua_State) -> T {
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// Pushes the userdata and attaches a metatable with __gc method.
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// Pushes the userdata and attaches a metatable with __gc method.
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// Internally uses 3 stack spaces, does not call checkstack.
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// Internally uses 3 stack spaces, does not call checkstack.
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pub unsafe fn push_gc_userdata<T: Any>(state: *mut ffi::lua_State, t: T) -> Result<()> {
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pub unsafe fn push_gc_userdata<T>(state: *mut ffi::lua_State, key: *const u8, t: T) -> Result<()> {
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push_userdata(state, t)?;
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push_userdata(state, t)?;
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get_gc_metatable_for::<T>(state);
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get_gc_metatable(state, key);
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ffi::lua_setmetatable(state, -2);
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ffi::lua_setmetatable(state, -2);
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Ok(())
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Ok(())
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}
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}
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// Uses 2 stack spaces, does not call checkstack
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// Uses 2 stack spaces, does not call checkstack
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pub unsafe fn get_gc_userdata<T: Any>(state: *mut ffi::lua_State, index: c_int) -> *mut T {
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pub unsafe fn get_gc_userdata<T>(
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state: *mut ffi::lua_State,
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index: c_int,
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key: *const u8,
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) -> *mut T {
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let ud = ffi::lua_touserdata(state, index) as *mut T;
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let ud = ffi::lua_touserdata(state, index) as *mut T;
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if ud.is_null() || ffi::lua_getmetatable(state, index) == 0 {
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if ud.is_null() || ffi::lua_getmetatable(state, index) == 0 {
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return ptr::null_mut();
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return ptr::null_mut();
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}
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}
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get_gc_metatable_for::<T>(state);
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get_gc_metatable(state, key);
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let res = ffi::lua_rawequal(state, -1, -2);
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let res = ffi::lua_rawequal(state, -1, -2);
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ffi::lua_pop(state, 2);
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ffi::lua_pop(state, 2);
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if res == 0 {
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if res == 0 {
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@ -525,7 +528,7 @@ where
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let wrapped_error = ud as *mut WrappedError;
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let wrapped_error = ud as *mut WrappedError;
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ptr::write(wrapped_error, WrappedError(err));
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ptr::write(wrapped_error, WrappedError(err));
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get_gc_metatable_for::<WrappedError>(state);
|
get_gc_metatable(state, &WRAPPED_ERROR_MT);
|
||||||
ffi::lua_setmetatable(state, -2);
|
ffi::lua_setmetatable(state, -2);
|
||||||
|
|
||||||
// Convert to CallbackError and attach traceback
|
// Convert to CallbackError and attach traceback
|
||||||
|
@ -545,7 +548,7 @@ where
|
||||||
Err(p) => {
|
Err(p) => {
|
||||||
ffi::lua_settop(state, 1);
|
ffi::lua_settop(state, 1);
|
||||||
ptr::write(ud as *mut WrappedPanic, WrappedPanic(Some(p)));
|
ptr::write(ud as *mut WrappedPanic, WrappedPanic(Some(p)));
|
||||||
get_gc_metatable_for::<WrappedPanic>(state);
|
get_gc_metatable(state, &WRAPPED_PANIC_MT);
|
||||||
ffi::lua_setmetatable(state, -2);
|
ffi::lua_setmetatable(state, -2);
|
||||||
ffi::lua_error(state)
|
ffi::lua_error(state)
|
||||||
}
|
}
|
||||||
|
@ -559,8 +562,8 @@ pub unsafe extern "C" fn error_traceback(state: *mut ffi::lua_State) -> c_int {
|
||||||
return 1;
|
return 1;
|
||||||
}
|
}
|
||||||
|
|
||||||
if get_gc_userdata::<WrappedError>(state, -1).is_null()
|
if get_gc_userdata::<WrappedError>(state, -1, &WRAPPED_ERROR_MT).is_null()
|
||||||
&& get_gc_userdata::<WrappedPanic>(state, -1).is_null()
|
&& get_gc_userdata::<WrappedPanic>(state, -1, &WRAPPED_PANIC_MT).is_null()
|
||||||
{
|
{
|
||||||
let s = ffi::luaL_tolstring(state, -1, ptr::null_mut());
|
let s = ffi::luaL_tolstring(state, -1, ptr::null_mut());
|
||||||
if ffi::lua_checkstack(state, ffi::LUA_TRACEBACK_STACK) != 0 {
|
if ffi::lua_checkstack(state, ffi::LUA_TRACEBACK_STACK) != 0 {
|
||||||
|
@ -587,7 +590,7 @@ pub unsafe extern "C" fn safe_pcall(state: *mut ffi::lua_State) -> c_int {
|
||||||
ffi::lua_insert(state, 1);
|
ffi::lua_insert(state, 1);
|
||||||
ffi::lua_gettop(state)
|
ffi::lua_gettop(state)
|
||||||
} else {
|
} else {
|
||||||
if !get_gc_userdata::<WrappedPanic>(state, -1).is_null() {
|
if !get_gc_userdata::<WrappedPanic>(state, -1, &WRAPPED_PANIC_MT).is_null() {
|
||||||
ffi::lua_error(state);
|
ffi::lua_error(state);
|
||||||
}
|
}
|
||||||
ffi::lua_pushboolean(state, 0);
|
ffi::lua_pushboolean(state, 0);
|
||||||
|
@ -601,7 +604,7 @@ pub unsafe extern "C" fn safe_xpcall(state: *mut ffi::lua_State) -> c_int {
|
||||||
unsafe extern "C" fn xpcall_msgh(state: *mut ffi::lua_State) -> c_int {
|
unsafe extern "C" fn xpcall_msgh(state: *mut ffi::lua_State) -> c_int {
|
||||||
ffi::luaL_checkstack(state, 2, ptr::null());
|
ffi::luaL_checkstack(state, 2, ptr::null());
|
||||||
|
|
||||||
if !get_gc_userdata::<WrappedPanic>(state, -1).is_null() {
|
if !get_gc_userdata::<WrappedPanic>(state, -1, &WRAPPED_PANIC_MT).is_null() {
|
||||||
1
|
1
|
||||||
} else {
|
} else {
|
||||||
ffi::lua_pushvalue(state, ffi::lua_upvalueindex(1));
|
ffi::lua_pushvalue(state, ffi::lua_upvalueindex(1));
|
||||||
|
@ -629,7 +632,7 @@ pub unsafe extern "C" fn safe_xpcall(state: *mut ffi::lua_State) -> c_int {
|
||||||
ffi::lua_insert(state, 2);
|
ffi::lua_insert(state, 2);
|
||||||
ffi::lua_gettop(state) - 1
|
ffi::lua_gettop(state) - 1
|
||||||
} else {
|
} else {
|
||||||
if !get_gc_userdata::<WrappedPanic>(state, -1).is_null() {
|
if !get_gc_userdata::<WrappedPanic>(state, -1, &WRAPPED_PANIC_MT).is_null() {
|
||||||
ffi::lua_error(state);
|
ffi::lua_error(state);
|
||||||
}
|
}
|
||||||
ffi::lua_pushboolean(state, 0);
|
ffi::lua_pushboolean(state, 0);
|
||||||
|
@ -664,14 +667,14 @@ pub unsafe fn get_main_state(state: *mut ffi::lua_State) -> Option<*mut ffi::lua
|
||||||
// Pushes a WrappedError to the top of the stack.
|
// Pushes a WrappedError to the top of the stack.
|
||||||
// Uses 3 stack spaces and does not call checkstack.
|
// Uses 3 stack spaces and does not call checkstack.
|
||||||
pub unsafe fn push_wrapped_error(state: *mut ffi::lua_State, err: Error) -> Result<()> {
|
pub unsafe fn push_wrapped_error(state: *mut ffi::lua_State, err: Error) -> Result<()> {
|
||||||
push_gc_userdata::<WrappedError>(state, WrappedError(err))
|
push_gc_userdata::<WrappedError>(state, &WRAPPED_ERROR_MT, WrappedError(err))
|
||||||
}
|
}
|
||||||
|
|
||||||
// Checks if the value at the given index is a WrappedError, and if it is returns a pointer to it,
|
// Checks if the value at the given index is a WrappedError, and if it is returns a pointer to it,
|
||||||
// otherwise returns null.
|
// otherwise returns null.
|
||||||
// Uses 2 stack spaces and does not call checkstack.
|
// Uses 2 stack spaces and does not call checkstack.
|
||||||
pub unsafe fn get_wrapped_error(state: *mut ffi::lua_State, index: c_int) -> *const Error {
|
pub unsafe fn get_wrapped_error(state: *mut ffi::lua_State, index: c_int) -> *const Error {
|
||||||
let ud = get_gc_userdata::<WrappedError>(state, index);
|
let ud = get_gc_userdata::<WrappedError>(state, index, &WRAPPED_ERROR_MT);
|
||||||
if ud.is_null() {
|
if ud.is_null() {
|
||||||
return ptr::null();
|
return ptr::null();
|
||||||
}
|
}
|
||||||
|
@ -680,23 +683,13 @@ pub unsafe fn get_wrapped_error(state: *mut ffi::lua_State, index: c_int) -> *co
|
||||||
|
|
||||||
// Initialize the internal (with __gc method) metatable for a type T.
|
// Initialize the internal (with __gc method) metatable for a type T.
|
||||||
// Uses 6 stack spaces and calls checkstack.
|
// Uses 6 stack spaces and calls checkstack.
|
||||||
pub unsafe fn init_gc_metatable_for<T: Any>(
|
pub unsafe fn init_gc_metatable<T>(
|
||||||
state: *mut ffi::lua_State,
|
state: *mut ffi::lua_State,
|
||||||
|
key: *const u8,
|
||||||
customize_fn: Option<fn(*mut ffi::lua_State) -> Result<()>>,
|
customize_fn: Option<fn(*mut ffi::lua_State) -> Result<()>>,
|
||||||
) -> Result<()> {
|
) -> Result<()> {
|
||||||
check_stack(state, 6)?;
|
check_stack(state, 6)?;
|
||||||
|
|
||||||
let type_id = TypeId::of::<T>();
|
|
||||||
let ref_addr = {
|
|
||||||
let mut mt_cache = mlua_expect!(METATABLE_CACHE.lock(), "cannot lock metatable cache");
|
|
||||||
mlua_assert!(
|
|
||||||
mt_cache.capacity() - mt_cache.len() > 0,
|
|
||||||
"out of metatable cache capacity"
|
|
||||||
);
|
|
||||||
mt_cache.insert(type_id, 0);
|
|
||||||
&mt_cache[&type_id] as *const u8
|
|
||||||
};
|
|
||||||
|
|
||||||
push_table(state, 0, 3)?;
|
push_table(state, 0, 3)?;
|
||||||
|
|
||||||
ffi::lua_pushcfunction(state, userdata_destructor::<T>);
|
ffi::lua_pushcfunction(state, userdata_destructor::<T>);
|
||||||
|
@ -710,19 +703,14 @@ pub unsafe fn init_gc_metatable_for<T: Any>(
|
||||||
}
|
}
|
||||||
|
|
||||||
protect_lua!(state, 1, 0, |state| {
|
protect_lua!(state, 1, 0, |state| {
|
||||||
ffi::lua_rawsetp(state, ffi::LUA_REGISTRYINDEX, ref_addr as *mut c_void)
|
ffi::lua_rawsetp(state, ffi::LUA_REGISTRYINDEX, key as *const c_void)
|
||||||
})?;
|
})?;
|
||||||
|
|
||||||
Ok(())
|
Ok(())
|
||||||
}
|
}
|
||||||
|
|
||||||
pub unsafe fn get_gc_metatable_for<T: Any>(state: *mut ffi::lua_State) {
|
pub unsafe fn get_gc_metatable(state: *mut ffi::lua_State, key: *const u8) {
|
||||||
let type_id = TypeId::of::<T>();
|
ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, key as *const c_void);
|
||||||
let ref_addr = {
|
|
||||||
let mt_cache = mlua_expect!(METATABLE_CACHE.lock(), "cannot lock metatable cache");
|
|
||||||
mlua_expect!(mt_cache.get(&type_id), "gc metatable does not exist") as *const u8
|
|
||||||
};
|
|
||||||
ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, ref_addr as *const c_void);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
// Initialize the error, panic, and destructed userdata metatables.
|
// Initialize the error, panic, and destructed userdata metatables.
|
||||||
|
@ -771,7 +759,9 @@ pub unsafe fn init_error_registry(state: *mut ffi::lua_State) -> Result<()> {
|
||||||
_ => {}
|
_ => {}
|
||||||
}
|
}
|
||||||
Ok(err_buf)
|
Ok(err_buf)
|
||||||
} else if let Some(panic) = get_gc_userdata::<WrappedPanic>(state, -1).as_ref() {
|
} else if let Some(panic) =
|
||||||
|
get_gc_userdata::<WrappedPanic>(state, -1, &WRAPPED_PANIC_MT).as_ref()
|
||||||
|
{
|
||||||
if let Some(ref p) = (*panic).0 {
|
if let Some(ref p) = (*panic).0 {
|
||||||
let err_buf_key = &ERROR_PRINT_BUFFER_KEY as *const u8 as *const c_void;
|
let err_buf_key = &ERROR_PRINT_BUFFER_KEY as *const u8 as *const c_void;
|
||||||
ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, err_buf_key);
|
ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, err_buf_key);
|
||||||
|
@ -802,16 +792,18 @@ pub unsafe fn init_error_registry(state: *mut ffi::lua_State) -> Result<()> {
|
||||||
})
|
})
|
||||||
}
|
}
|
||||||
|
|
||||||
init_gc_metatable_for::<WrappedError>(
|
init_gc_metatable::<WrappedError>(
|
||||||
state,
|
state,
|
||||||
|
&WRAPPED_ERROR_MT,
|
||||||
Some(|state| {
|
Some(|state| {
|
||||||
ffi::lua_pushcfunction(state, error_tostring);
|
ffi::lua_pushcfunction(state, error_tostring);
|
||||||
rawset_field(state, -2, "__tostring")
|
rawset_field(state, -2, "__tostring")
|
||||||
}),
|
}),
|
||||||
)?;
|
)?;
|
||||||
|
|
||||||
init_gc_metatable_for::<WrappedPanic>(
|
init_gc_metatable::<WrappedPanic>(
|
||||||
state,
|
state,
|
||||||
|
&WRAPPED_PANIC_MT,
|
||||||
Some(|state| {
|
Some(|state| {
|
||||||
ffi::lua_pushcfunction(state, error_tostring);
|
ffi::lua_pushcfunction(state, error_tostring);
|
||||||
rawset_field(state, -2, "__tostring")
|
rawset_field(state, -2, "__tostring")
|
||||||
|
@ -870,16 +862,16 @@ pub unsafe fn init_error_registry(state: *mut ffi::lua_State) -> Result<()> {
|
||||||
ffi::lua_pop(state, 1);
|
ffi::lua_pop(state, 1);
|
||||||
|
|
||||||
protect_lua!(state, 1, 0, state => {
|
protect_lua!(state, 1, 0, state => {
|
||||||
let destructed_metatable_key = &DESTRUCTED_USERDATA_METATABLE as *const u8 as *const c_void;
|
let key = &DESTRUCTED_USERDATA_MT as *const u8 as *const c_void;
|
||||||
ffi::lua_rawsetp(state, ffi::LUA_REGISTRYINDEX, destructed_metatable_key)
|
ffi::lua_rawsetp(state, ffi::LUA_REGISTRYINDEX, key)
|
||||||
})?;
|
})?;
|
||||||
|
|
||||||
// Create error print buffer
|
// Create error print buffer
|
||||||
init_gc_metatable_for::<String>(state, None)?;
|
init_gc_metatable::<String>(state, &ERROR_PRINT_BUFFER_KEY, None)?;
|
||||||
push_gc_userdata(state, String::new())?;
|
push_gc_userdata(state, &ERROR_PRINT_BUFFER_KEY, String::new())?;
|
||||||
protect_lua!(state, 1, 0, state => {
|
protect_lua!(state, 1, 0, state => {
|
||||||
let err_buf_key = &ERROR_PRINT_BUFFER_KEY as *const u8 as *const c_void;
|
let key = &ERROR_PRINT_BUFFER_KEY as *const u8 as *const c_void;
|
||||||
ffi::lua_rawsetp(state, ffi::LUA_REGISTRYINDEX, err_buf_key)
|
ffi::lua_rawsetp(state, ffi::LUA_REGISTRYINDEX, key)
|
||||||
})?;
|
})?;
|
||||||
|
|
||||||
Ok(())
|
Ok(())
|
||||||
|
@ -923,9 +915,6 @@ pub(crate) unsafe fn to_string(state: *mut ffi::lua_State, index: c_int) -> Stri
|
||||||
}
|
}
|
||||||
|
|
||||||
pub(crate) unsafe fn get_destructed_userdata_metatable(state: *mut ffi::lua_State) {
|
pub(crate) unsafe fn get_destructed_userdata_metatable(state: *mut ffi::lua_State) {
|
||||||
let key = &DESTRUCTED_USERDATA_METATABLE as *const u8 as *const c_void;
|
let key = &DESTRUCTED_USERDATA_MT as *const u8 as *const c_void;
|
||||||
ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, key);
|
ffi::lua_rawgetp(state, ffi::LUA_REGISTRYINDEX, key);
|
||||||
}
|
}
|
||||||
|
|
||||||
static DESTRUCTED_USERDATA_METATABLE: u8 = 0;
|
|
||||||
static ERROR_PRINT_BUFFER_KEY: u8 = 0;
|
|
||||||
|
|
Loading…
Reference in New Issue