library/std/src/sys_common/thread_parker/mod.rs

   1 cfg_if::cfg_if! {
   2     if #[cfg(any(target_os = "linux", target_os = "android"))] {
   3         mod futex;
   4         pub use futex::Parker;
   5     } else {
   6         mod generic;
   7         pub use generic::Parker;
   8     }
   9 }