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Rollup merge of #114283 - oli-obk:parkin_lot_rwlock, r=SparrowLii

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Use parking lot's rwlock even without parallel-rustc

Considering that this doesn't affect perf, I think we should use the simplest solution.
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Matthias Krüger 2023-08-01 17:39:10 +02:00 • committed by GitHub
commit b38718090e
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1 changed files with 7 additions and 21 deletions
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28
compiler/rustc_data_structures/src/sync/vec.rs
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@ -43,37 +43,23 @@ impl<I: Idx, T: Copy> AppendOnlyIndexVec<I, T> {
#[derive(Default)]
pub struct AppendOnlyVec<T: Copy> {
#[cfg(not(parallel_compiler))]
vec: elsa::vec::FrozenVec<T>,
#[cfg(parallel_compiler)]
vec: elsa::sync::LockFreeFrozenVec<T>,
vec: parking_lot::RwLock<Vec<T>>,
}
impl<T: Copy> AppendOnlyVec<T> {
pub fn new() -> Self {
Self {
#[cfg(not(parallel_compiler))]
vec: elsa::vec::FrozenVec::new(),
#[cfg(parallel_compiler)]
vec: elsa::sync::LockFreeFrozenVec::new(),
}
Self { vec: Default::default() }
}
pub fn push(&self, val: T) -> usize {
#[cfg(not(parallel_compiler))]
let i = self.vec.len();
#[cfg(not(parallel_compiler))]
self.vec.push(val);
#[cfg(parallel_compiler)]
let i = self.vec.push(val);
i
let mut v = self.vec.write();
let n = v.len();
v.push(val);
n
}
pub fn get(&self, i: usize) -> Option<T> {
#[cfg(not(parallel_compiler))]
return self.vec.get_copy(i);
#[cfg(parallel_compiler)]
return self.vec.get(i);
self.vec.read().get(i).copied()
}
pub fn iter_enumerated(&self) -> impl Iterator<Item = (usize, T)> + '_ {