module Condition:sig..end
timedwait cond mtx timeout waits on condition variable cond
    with mutex mtx until either the condition is signalled, or until
    timeout expires.  Note that timeout is an absolute Unix-time to
    prevent time-related race conditions.false iff the timer expired, but this does not mean that
    the condition is not true due to an unavoidable race condition in
    the system call.
    See man pthread_cond_timedwait for details.
typet =Condition.t
val create : unit -> t
val equal : t -> t -> bool
val wait : t -> Mutex.t -> unit
val timedwait : t -> Mutex.t -> Time.t -> booltimedwait cond mtx timeout waits on condition variable cond
    with mutex mtx until either the condition is signalled, or until
    timeout expires.  Note that timeout is an absolute Unix-time to
    prevent time-related race conditions.false iff the timer expired, but this does not mean that
    the condition is not true due to an unavoidable race condition in
    the system call.
    See man pthread_cond_timedwait for details.
val signal : t -> unit
val broadcast : t -> unit