cfg_if::cfg_if! {
if #[cfg(target_os = "windows")] {
mod iocp;
pub use iocp::*;
} else if #[cfg(any(
target_os = "android",
target_os = "freebsd",
target_os = "illumos",
target_os = "linux",
))] {
mod eventfd;
pub use eventfd::*;
} else if #[cfg(unix)] {
mod pipe;
pub use pipe::*;
}
}