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use std::time::Duration;

#[cfg(feature = "runtime_thread")]
pub type Receiver<T> = crossbeam::channel::Receiver<T>;
#[cfg(feature = "runtime_thread")]
pub type Sender<T> = crossbeam::channel::Sender<T>;
#[cfg(feature = "runtime_thread")]
pub type JoinHandle<T> = std::thread::JoinHandle<T>;
#[cfg(feature = "runtime_thread")]
pub type WaitGroup = crossbeam_utils::sync::WaitGroup;

#[cfg(feature = "runtime_thread")]
pub fn chan<T>(len:Option<usize>) -> (Sender<T>, Receiver<T>) {
    match len{
        None => {
            crossbeam::channel::unbounded()
        }
        Some(len) => {
            crossbeam::channel::bounded(len)
        }
    }
}

#[cfg(feature = "runtime_thread")]
pub fn sleep(d: Duration) {
    std::thread::sleep(d)
}

#[cfg(feature = "runtime_thread")]
pub fn spawn<F>(f: F) -> JoinHandle<()> where F: FnOnce() + std::marker::Send + 'static {
    std::thread::spawn(f)
}

#[cfg(feature = "runtime_thread")]
pub fn spawn_stack_size<F>(f: F, stack_size:usize) -> JoinHandle<()> where F: FnOnce() + std::marker::Send + 'static {
    std::thread::spawn(f)
}