Enable Thread::reset for Luau
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@ -152,8 +152,8 @@ pub struct LuaOptions {
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/// Max size of thread (coroutine) object cache used to execute asynchronous functions.
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///
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/// It works only on Lua 5.4 or LuaJIT (vendored) with [`lua_resetthread`] function,
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/// and allows to reuse old coroutines with reset state.
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/// It works on Lua 5.4, LuaJIT (vendored) and Luau, where [`lua_resetthread`] function
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/// is available and allows to reuse old coroutines with reset state.
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///
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/// Default: **0** (disabled)
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///
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@ -7,7 +7,11 @@ use crate::types::LuaRef;
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use crate::util::{check_stack, error_traceback, pop_error, StackGuard};
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use crate::value::{FromLuaMulti, ToLuaMulti};
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#[cfg(any(feature = "lua54", all(feature = "luajit", feature = "vendored")))]
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#[cfg(any(
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feature = "lua54",
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all(feature = "luajit", feature = "vendored"),
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feature = "luau",
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))]
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use crate::function::Function;
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#[cfg(feature = "async")]
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@ -173,16 +177,20 @@ impl<'lua> Thread<'lua> {
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/// Returns a error in case of either the original error that stopped the thread or errors
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/// in closing methods.
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///
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/// In [LuaJIT]: resets to the initial state of a newly created Lua thread.
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/// In [LuaJIT] and Luau: resets to the initial state of a newly created Lua thread.
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/// Lua threads in arbitrary states (like yielded or errored) can be reset properly.
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///
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/// Sets a Lua function for the thread afterwards.
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///
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/// Requires `feature = "lua54"` OR `feature = "luajit,vendored"`
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/// Requires `feature = "lua54"` OR `feature = "luajit,vendored"` OR `feature = "luau"`
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///
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/// [Lua 5.4]: https://www.lua.org/manual/5.4/manual.html#lua_resetthread
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/// [LuaJIT]: https://github.com/openresty/luajit2#lua_resetthread
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#[cfg(any(feature = "lua54", all(feature = "luajit", feature = "vendored")))]
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#[cfg(any(
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feature = "lua54",
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all(feature = "luajit", feature = "vendored"),
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feature = "luau",
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))]
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pub fn reset(&self, func: Function<'lua>) -> Result<()> {
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let lua = self.0.lua;
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unsafe {
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@ -94,7 +94,11 @@ fn test_thread() -> Result<()> {
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}
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#[test]
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#[cfg(any(feature = "lua54", all(feature = "luajit", feature = "vendored")))]
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#[cfg(any(
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feature = "lua54",
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all(feature = "luajit", feature = "vendored"),
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feature = "luau",
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))]
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fn test_thread_reset() -> Result<()> {
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use mlua::{AnyUserData, UserData};
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use std::sync::Arc;
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@ -121,14 +125,14 @@ fn test_thread_reset() -> Result<()> {
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assert_eq!(Arc::strong_count(&arc), 1);
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}
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// Check for errors (Lua 5.4 only)
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#[cfg(feature = "lua54")]
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{
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// Check for errors
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let func: Function = lua.load(r#"function(ud) error("test error") end"#).eval()?;
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let thread = lua.create_thread(func.clone())?;
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let _ = thread.resume::<_, AnyUserData>(MyUserData(arc.clone()));
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assert_eq!(thread.status(), ThreadStatus::Error);
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assert_eq!(Arc::strong_count(&arc), 2);
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#[cfg(feature = "lua54")]
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{
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assert!(thread.reset(func.clone()).is_err());
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// Reset behavior has changed in Lua v5.4.4
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// It's became possible to force reset thread by popping error object
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@ -140,6 +144,11 @@ fn test_thread_reset() -> Result<()> {
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// assert!(thread.reset(func.clone()).is_ok());
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// assert_eq!(thread.status(), ThreadStatus::Resumable);
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}
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#[cfg(any(feature = "lua54", feature = "luau"))]
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{
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assert!(thread.reset(func.clone()).is_ok());
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assert_eq!(thread.status(), ThreadStatus::Resumable);
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}
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Ok(())
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}
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