use super::ExactParallelIterator;
use std::isize;
use std::sync::atomic::{AtomicUsize, Ordering};
mod consumer;
use self::consumer::CollectConsumer;
pub fn collect_into<PAR_ITER,T>(mut pi: PAR_ITER, v: &mut Vec<T>)
where PAR_ITER: ExactParallelIterator<Item=T>,
PAR_ITER: ExactParallelIterator,
T: Send,
{
let len = pi.len();
assert!(len < isize::MAX as usize);
v.truncate(0); v.reserve(len); let target = v.as_mut_ptr(); let writes = AtomicUsize::new(0);
let consumer = unsafe { CollectConsumer::new(&writes, target, len)
};
pi.drive(consumer);
unsafe {
let actual_writes = writes.load(Ordering::Relaxed);
assert!(actual_writes == len, "expected {} total writes, but got {}", len, actual_writes);
v.set_len(len);
}
}