Minor refacor of wrapped failures cache
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parent
e42d67c70d
commit
01154c0616
41
src/lua.rs
41
src/lua.rs
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@ -76,9 +76,8 @@ struct ExtraData {
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ref_stack_top: c_int,
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ref_free: Vec<c_int>,
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// Vec of preallocated `WrappedFailure` enums
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// Used for callbacks optimization
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prealloc_wrapped_failures: Vec<c_int>,
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// Pool of preallocated `WrappedFailure` enums
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wrapped_failures_pool: Vec<c_int>,
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hook_callback: Option<HookCallback>,
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}
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@ -153,6 +152,8 @@ pub(crate) static ASYNC_POLL_PENDING: 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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const WRAPPED_FAILURES_POOL_SIZE: usize = 16;
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/// Requires `feature = "send"`
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#[cfg(feature = "send")]
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#[cfg_attr(docsrs, doc(cfg(feature = "send")))]
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@ -163,7 +164,7 @@ impl Drop for Lua {
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unsafe {
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if !self.ephemeral {
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let extra = &mut *self.extra.get();
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for index in extra.prealloc_wrapped_failures.clone() {
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for index in extra.wrapped_failures_pool.drain(..) {
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ffi::lua_pushnil(extra.ref_thread);
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ffi::lua_replace(extra.ref_thread, index);
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extra.ref_free.push(index);
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@ -453,7 +454,7 @@ impl Lua {
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ref_stack_size: ffi::LUA_MINSTACK - 1,
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ref_stack_top: 0,
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ref_free: Vec::new(),
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prealloc_wrapped_failures: Vec::new(),
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wrapped_failures_pool: Vec::new(),
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hook_callback: None,
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}));
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@ -2422,18 +2423,16 @@ where
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// We cannot shadow Rust errors with Lua ones, so we need to obtain pre-allocated memory
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// to store a wrapped error or panic *before* we proceed.
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let extra = &mut *get_extra(state);
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let prealloc_failure = {
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match extra.prealloc_wrapped_failures.pop() {
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Some(index) => PreallocatedFailure::Cached(index),
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None => {
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let ud = ffi::lua_newuserdata(state, mem::size_of::<WrappedFailure>());
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ffi::lua_rotate(state, 1, 1);
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PreallocatedFailure::New(ud as *mut WrappedFailure)
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}
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let prealloc_failure = match extra.wrapped_failures_pool.pop() {
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Some(index) => PreallocatedFailure::Cached(index),
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None => {
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let ud = ffi::lua_newuserdata(state, mem::size_of::<WrappedFailure>());
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ffi::lua_rotate(state, 1, 1);
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PreallocatedFailure::New(ud as *mut WrappedFailure)
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}
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};
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let mut get_prealloc_failure = || match prealloc_failure {
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let mut get_wrapped_failure = || match prealloc_failure {
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PreallocatedFailure::New(ud) => {
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ffi::lua_settop(state, 1);
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ud
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@ -2453,19 +2452,21 @@ where
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Ok(Ok(r)) => {
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// Return unused WrappedFailure to the cache
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match prealloc_failure {
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PreallocatedFailure::New(_) if extra.prealloc_wrapped_failures.len() < 16 => {
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PreallocatedFailure::New(_)
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if extra.wrapped_failures_pool.len() < WRAPPED_FAILURES_POOL_SIZE =>
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{
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ffi::lua_rotate(state, 1, -1);
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ffi::lua_xmove(state, extra.ref_thread, 1);
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let index = ref_stack_pop(extra);
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extra.prealloc_wrapped_failures.push(index);
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extra.wrapped_failures_pool.push(index);
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}
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PreallocatedFailure::New(_) => {
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ffi::lua_remove(state, 1);
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}
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PreallocatedFailure::Cached(index)
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if extra.prealloc_wrapped_failures.len() < 16 =>
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if extra.wrapped_failures_pool.len() < WRAPPED_FAILURES_POOL_SIZE =>
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{
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extra.prealloc_wrapped_failures.push(index);
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extra.wrapped_failures_pool.push(index);
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}
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PreallocatedFailure::Cached(index) => {
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ffi::lua_pushnil(extra.ref_thread);
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@ -2476,7 +2477,7 @@ where
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r
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}
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Ok(Err(err)) => {
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let wrapped_error = get_prealloc_failure();
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let wrapped_error = get_wrapped_failure();
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ptr::write(wrapped_error, WrappedFailure::Error(err));
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get_gc_metatable::<WrappedFailure>(state);
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ffi::lua_setmetatable(state, -2);
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@ -2498,7 +2499,7 @@ where
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ffi::lua_error(state)
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}
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Err(p) => {
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let wrapped_panic = get_prealloc_failure();
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let wrapped_panic = get_wrapped_failure();
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ptr::write(wrapped_panic, WrappedFailure::Panic(Some(p)));
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get_gc_metatable::<WrappedFailure>(state);
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ffi::lua_setmetatable(state, -2);
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