pub mod helper {
    use core::hint;

    use rusturnate::editor::Editor;

    #[inline(always)]
    pub fn prevent_optimization<T: ?Sized>(t: &T) {
        // do not optimize editor:
        hint::black_box(t);
    }

    #[inline(always)]
    pub fn intentionally_panic_while_holding<T>(editor: Editor<T>) -> ! {
        prevent_optimization(&editor);

        // intentionally panic and poison editor:
        panic!("test panic; test whether panic is received correctly");
    }
}

#[cfg(feature = "std")]
pub mod std_helper {
    use std::thread::JoinHandle;

    use tokio::task;

    #[inline(always)]
    pub fn await_completion<T>(handle: JoinHandle<T>) {
        let _: Option<T> = handle.join().ok();
    }

    #[inline]
    pub async fn await_completion_non_blocking<T: 'static>(handle: JoinHandle<T>) {
        let _: () = task::spawn_blocking(move || await_completion(handle))
            .await
            .unwrap();
    }
}

pub mod affinity_helper {
    use core_affinity::{self, CoreId};

    #[inline]
    pub fn get_two_different_core_ids() -> Option<(CoreId, CoreId)> {
        let core_ids: Vec<CoreId> = core_affinity::get_core_ids()?;
        let two_core_ids: &[CoreId] = core_ids.get(0..=1)?;
        let [core_id1, core_id2]: [_; 2] = two_core_ids.try_into().ok()?;
        assert_ne!(core_id1, core_id2, "gotten two equal core ids");
        Some((core_id1, core_id2))
    }

    #[inline]
    pub fn set_core_affinity(core_id: CoreId) -> bool {
        let changed_affinity: bool = core_affinity::set_for_current(core_id);
        if !changed_affinity {
            eprintln!("unable to set core affinity to {core_id:?}")
        }
        changed_affinity
    }

    #[inline]
    pub fn if_provided_set_core_affinity(core_id: Option<CoreId>) {
        let _: bool = core_id.map_or(false, set_core_affinity);
    }

    #[inline]
    pub fn prepare_on_fixed_core() -> Option<CoreId> {
        let (core_id1, core_id2) = get_two_different_core_ids()?;
        set_core_affinity(core_id1).then_some(())?;
        Some(core_id2)
    }
}