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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/rayon/src/iter/panic_fuse.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
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-rw-r--r--vendor/rayon/src/iter/panic_fuse.rs342
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diff --git a/vendor/rayon/src/iter/panic_fuse.rs b/vendor/rayon/src/iter/panic_fuse.rs
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-use super::plumbing::*;
-use super::*;
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::thread;
-
-/// `PanicFuse` is an adaptor that wraps an iterator with a fuse in case
-/// of panics, to halt all threads as soon as possible.
-///
-/// This struct is created by the [`panic_fuse()`] method on [`ParallelIterator`]
-///
-/// [`panic_fuse()`]: trait.ParallelIterator.html#method.panic_fuse
-/// [`ParallelIterator`]: trait.ParallelIterator.html
-#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
-#[derive(Debug, Clone)]
-pub struct PanicFuse<I: ParallelIterator> {
- base: I,
-}
-
-/// Helper that sets a bool to `true` if dropped while unwinding.
-#[derive(Clone)]
-struct Fuse<'a>(&'a AtomicBool);
-
-impl<'a> Drop for Fuse<'a> {
- #[inline]
- fn drop(&mut self) {
- if thread::panicking() {
- self.0.store(true, Ordering::Relaxed);
- }
- }
-}
-
-impl<'a> Fuse<'a> {
- #[inline]
- fn panicked(&self) -> bool {
- self.0.load(Ordering::Relaxed)
- }
-}
-
-impl<I> PanicFuse<I>
-where
- I: ParallelIterator,
-{
- /// Creates a new `PanicFuse` iterator.
- pub(super) fn new(base: I) -> PanicFuse<I> {
- PanicFuse { base }
- }
-}
-
-impl<I> ParallelIterator for PanicFuse<I>
-where
- I: ParallelIterator,
-{
- type Item = I::Item;
-
- fn drive_unindexed<C>(self, consumer: C) -> C::Result
- where
- C: UnindexedConsumer<Self::Item>,
- {
- let panicked = AtomicBool::new(false);
- let consumer1 = PanicFuseConsumer {
- base: consumer,
- fuse: Fuse(&panicked),
- };
- self.base.drive_unindexed(consumer1)
- }
-
- fn opt_len(&self) -> Option<usize> {
- self.base.opt_len()
- }
-}
-
-impl<I> IndexedParallelIterator for PanicFuse<I>
-where
- I: IndexedParallelIterator,
-{
- fn drive<C>(self, consumer: C) -> C::Result
- where
- C: Consumer<Self::Item>,
- {
- let panicked = AtomicBool::new(false);
- let consumer1 = PanicFuseConsumer {
- base: consumer,
- fuse: Fuse(&panicked),
- };
- self.base.drive(consumer1)
- }
-
- fn len(&self) -> usize {
- self.base.len()
- }
-
- fn with_producer<CB>(self, callback: CB) -> CB::Output
- where
- CB: ProducerCallback<Self::Item>,
- {
- return self.base.with_producer(Callback { callback });
-
- struct Callback<CB> {
- callback: CB,
- }
-
- impl<T, CB> ProducerCallback<T> for Callback<CB>
- where
- CB: ProducerCallback<T>,
- {
- type Output = CB::Output;
-
- fn callback<P>(self, base: P) -> CB::Output
- where
- P: Producer<Item = T>,
- {
- let panicked = AtomicBool::new(false);
- let producer = PanicFuseProducer {
- base,
- fuse: Fuse(&panicked),
- };
- self.callback.callback(producer)
- }
- }
- }
-}
-
-/// ////////////////////////////////////////////////////////////////////////
-/// Producer implementation
-
-struct PanicFuseProducer<'a, P> {
- base: P,
- fuse: Fuse<'a>,
-}
-
-impl<'a, P> Producer for PanicFuseProducer<'a, P>
-where
- P: Producer,
-{
- type Item = P::Item;
- type IntoIter = PanicFuseIter<'a, P::IntoIter>;
-
- fn into_iter(self) -> Self::IntoIter {
- PanicFuseIter {
- base: self.base.into_iter(),
- fuse: self.fuse,
- }
- }
-
- fn min_len(&self) -> usize {
- self.base.min_len()
- }
- fn max_len(&self) -> usize {
- self.base.max_len()
- }
-
- fn split_at(self, index: usize) -> (Self, Self) {
- let (left, right) = self.base.split_at(index);
- (
- PanicFuseProducer {
- base: left,
- fuse: self.fuse.clone(),
- },
- PanicFuseProducer {
- base: right,
- fuse: self.fuse,
- },
- )
- }
-
- fn fold_with<G>(self, folder: G) -> G
- where
- G: Folder<Self::Item>,
- {
- let folder1 = PanicFuseFolder {
- base: folder,
- fuse: self.fuse,
- };
- self.base.fold_with(folder1).base
- }
-}
-
-struct PanicFuseIter<'a, I> {
- base: I,
- fuse: Fuse<'a>,
-}
-
-impl<'a, I> Iterator for PanicFuseIter<'a, I>
-where
- I: Iterator,
-{
- type Item = I::Item;
-
- fn next(&mut self) -> Option<Self::Item> {
- if self.fuse.panicked() {
- None
- } else {
- self.base.next()
- }
- }
-
- fn size_hint(&self) -> (usize, Option<usize>) {
- self.base.size_hint()
- }
-}
-
-impl<'a, I> DoubleEndedIterator for PanicFuseIter<'a, I>
-where
- I: DoubleEndedIterator,
-{
- fn next_back(&mut self) -> Option<Self::Item> {
- if self.fuse.panicked() {
- None
- } else {
- self.base.next_back()
- }
- }
-}
-
-impl<'a, I> ExactSizeIterator for PanicFuseIter<'a, I>
-where
- I: ExactSizeIterator,
-{
- fn len(&self) -> usize {
- self.base.len()
- }
-}
-
-/// ////////////////////////////////////////////////////////////////////////
-/// Consumer implementation
-
-struct PanicFuseConsumer<'a, C> {
- base: C,
- fuse: Fuse<'a>,
-}
-
-impl<'a, T, C> Consumer<T> for PanicFuseConsumer<'a, C>
-where
- C: Consumer<T>,
-{
- type Folder = PanicFuseFolder<'a, C::Folder>;
- type Reducer = PanicFuseReducer<'a, C::Reducer>;
- type Result = C::Result;
-
- fn split_at(self, index: usize) -> (Self, Self, Self::Reducer) {
- let (left, right, reducer) = self.base.split_at(index);
- (
- PanicFuseConsumer {
- base: left,
- fuse: self.fuse.clone(),
- },
- PanicFuseConsumer {
- base: right,
- fuse: self.fuse.clone(),
- },
- PanicFuseReducer {
- base: reducer,
- _fuse: self.fuse,
- },
- )
- }
-
- fn into_folder(self) -> Self::Folder {
- PanicFuseFolder {
- base: self.base.into_folder(),
- fuse: self.fuse,
- }
- }
-
- fn full(&self) -> bool {
- self.fuse.panicked() || self.base.full()
- }
-}
-
-impl<'a, T, C> UnindexedConsumer<T> for PanicFuseConsumer<'a, C>
-where
- C: UnindexedConsumer<T>,
-{
- fn split_off_left(&self) -> Self {
- PanicFuseConsumer {
- base: self.base.split_off_left(),
- fuse: self.fuse.clone(),
- }
- }
-
- fn to_reducer(&self) -> Self::Reducer {
- PanicFuseReducer {
- base: self.base.to_reducer(),
- _fuse: self.fuse.clone(),
- }
- }
-}
-
-struct PanicFuseFolder<'a, C> {
- base: C,
- fuse: Fuse<'a>,
-}
-
-impl<'a, T, C> Folder<T> for PanicFuseFolder<'a, C>
-where
- C: Folder<T>,
-{
- type Result = C::Result;
-
- fn consume(mut self, item: T) -> Self {
- self.base = self.base.consume(item);
- self
- }
-
- fn consume_iter<I>(mut self, iter: I) -> Self
- where
- I: IntoIterator<Item = T>,
- {
- fn cool<'a, T>(fuse: &'a Fuse<'_>) -> impl Fn(&T) -> bool + 'a {
- move |_| !fuse.panicked()
- }
-
- self.base = {
- let fuse = &self.fuse;
- let iter = iter.into_iter().take_while(cool(fuse));
- self.base.consume_iter(iter)
- };
- self
- }
-
- fn complete(self) -> C::Result {
- self.base.complete()
- }
-
- fn full(&self) -> bool {
- self.fuse.panicked() || self.base.full()
- }
-}
-
-struct PanicFuseReducer<'a, C> {
- base: C,
- _fuse: Fuse<'a>,
-}
-
-impl<'a, T, C> Reducer<T> for PanicFuseReducer<'a, C>
-where
- C: Reducer<T>,
-{
- fn reduce(self, left: T, right: T) -> T {
- self.base.reduce(left, right)
- }
-}