///
/// Behavior is undefined if the mutex is moved after it is
/// first used with any of the functions below.
+ /// Also, until `init` is called, behavior is undefined if this
+ /// mutex is ever used reentrantly, i.e., `raw_lock` or `try_lock`
+ /// are called by the thread currently holding the lock.
+ #[unstable(feature = "sys_internals", issue = "0")] // FIXME: min_const_fn
pub const fn new() -> Mutex { Mutex(imp::Mutex::new()) }
/// Prepare the mutex for use.
///
/// This should be called once the mutex is at a stable memory address.
+ /// If called, this must be the very first thing that happens to the mutex.
+ /// Calling it in parallel with or after any operation (including another
+ /// `init()`) is undefined behavior.
#[inline]
pub unsafe fn init(&mut self) { self.0.init() }