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Added parallel_map_for_each #9

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Added parallel_map_for_each #9

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22 changes: 22 additions & 0 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ use std::sync::{
atomic::{AtomicBool, Ordering::SeqCst},
Arc,
};
use std::any::Any;

mod parallel_map;
pub use self::parallel_map::{ParallelMap, ParallelMapBuilder};
Expand Down Expand Up @@ -101,6 +102,27 @@ pub trait IteratorExt {
of(ParallelMapBuilder::new(self)).with_scoped(scope, f)
}

/// `iter.parallel_map_for_each(m, f)` is something like `iter.parallel_map(m).for_each(f)`, but allows to borrow stack variables
/// (i. e. doesn't require `'static`)
fn parallel_map_for_each<Map, ForEach, O>(
self,
m: Map,
f: ForEach,
) -> Result<(), Box<dyn Any + Send + 'static>>
where
Self: Sized,
Self: Iterator,
Map: Send + Clone,
Self::Item: Send,
Map: FnMut(Self::Item) -> O,
O: Send,
ForEach: FnMut(O),
{
crossbeam::thread::scope(move |s| {
self.parallel_map_scoped(s, m).for_each(f);
})
}

/// Run `filter` function in parallel on multiple threads
///
/// A wrapper around [`IteratorExt::parallel_map`] really, so it has similiar properties.
Expand Down