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use crate::{
ThreadExecutor,
generic_values::{
Values,
runner_results::{Reduce, StopReduce},
},
};
use orx_concurrent_iter::{ChunkPuller, ConcurrentIter};
// m
pub fn m<C, I, O, M1, Red>(
mut runner: C,
iter: &I,
shared_state: &C::SharedState,
map1: &M1,
reduce: &Red,
) -> Option<O>
where
C: ThreadExecutor,
I: ConcurrentIter,
M1: Fn(I::Item) -> O,
Red: Fn(O, O) -> O,
{
let mut chunk_puller = iter.chunk_puller(0);
let mut item_puller = iter.item_puller();
let mut acc = None;
loop {
let chunk_size = runner.next_chunk_size(shared_state, iter);
runner.begin_chunk(chunk_size);
match chunk_size {
0 | 1 => match item_puller.next() {
Some(i) => {
let y = map1(i);
acc = match acc {
Some(x) => Some(reduce(x, y)),
None => Some(y),
};
}
None => {
if iter.is_completed_when_none_returned() {
break;
}
}
},
c => {
if c > chunk_puller.chunk_size() {
chunk_puller = iter.chunk_puller(c);
}
match chunk_puller.pull() {
Some(chunk) => {
// println!("chunk = {}", chunk.len());
let res = chunk.map(map1).reduce(reduce);
acc = match acc {
Some(x) => match res {
Some(y) => Some(reduce(x, y)),
None => Some(x),
},
None => res,
};
}
None => {
if iter.is_completed_when_none_returned() {
break;
}
}
}
}
}
runner.complete_chunk(shared_state, chunk_size);
}
runner.complete_task(shared_state);
acc
}
// x
pub fn x<C, I, Vo, X1, Red>(
mut runner: C,
iter: &I,
shared_state: &C::SharedState,
xap1: &X1,
reduce: &Red,
) -> Reduce<Vo>
where
C: ThreadExecutor,
I: ConcurrentIter,
Vo: Values,
X1: Fn(I::Item) -> Vo,
Red: Fn(Vo::Item, Vo::Item) -> Vo::Item,
{
let mut chunk_puller = iter.chunk_puller(0);
let mut item_puller = iter.item_puller();
let mut acc = None;
loop {
let chunk_size = runner.next_chunk_size(shared_state, iter);
runner.begin_chunk(chunk_size);
match chunk_size {
0 | 1 => match item_puller.next() {
Some(i) => {
let vo = xap1(i);
let reduce = vo.acc_reduce(acc, reduce);
acc = match Vo::reduce_to_stop(reduce) {
Ok(acc) => acc,
Err(stop) => {
iter.skip_to_end();
runner.complete_chunk(shared_state, chunk_size);
runner.complete_task(shared_state);
match stop {
StopReduce::DueToWhile { acc } => {
return Reduce::StoppedByWhileCondition { acc };
}
StopReduce::DueToError { error } => {
return Reduce::StoppedByError { error };
}
}
}
};
}
None => {
if iter.is_completed_when_none_returned() {
break;
}
}
},
c => {
if c > chunk_puller.chunk_size() {
chunk_puller = iter.chunk_puller(c);
}
match chunk_puller.pull() {
Some(chunk) => {
for i in chunk {
let vo = xap1(i);
let reduce = vo.acc_reduce(acc, reduce);
acc = match Vo::reduce_to_stop(reduce) {
Ok(acc) => acc,
Err(stop) => {
iter.skip_to_end();
runner.complete_chunk(shared_state, chunk_size);
runner.complete_task(shared_state);
match stop {
StopReduce::DueToWhile { acc } => {
return Reduce::StoppedByWhileCondition { acc };
}
StopReduce::DueToError { error } => {
return Reduce::StoppedByError { error };
}
}
}
};
}
}
None => {
if iter.is_completed_when_none_returned() {
break;
}
}
}
}
}
runner.complete_chunk(shared_state, chunk_size);
}
runner.complete_task(shared_state);
Reduce::Done { acc }
}