Module Shutdown

module Shutdown: Shutdown

val shutdown : ?force:unit Import.Deferred.t -> int -> unit

shutdown ?force status initiates shutdown, which runs all the at_shutdown functions, waits for them to finish, and then exits with the supplied status. The at_shutdown functions can block -- one can use ~force to forcibly exit (with status 1) if the at_shutdown functions do not finish in a reasonable amount of time.

By default, force is after (sec 10.).

Repeated calls to shutdown with the same status will have no effect. Any call to shutdown with nonzero status will cause that to be the status that is exited with. A call to shutdown with different nonzero status from the original call will raise.

val shutting_down : unit -> [ `No | `Yes of int ]

shutting_down () reports whether we are currently shutting down, and if so, with what status.

val shutdown_and_raise : ?force:unit Import.Deferred.t -> int -> Core.Std.never_returns

shutdown_and_raise ?force status initiates shutdown and immediately raises.

val at_shutdown : (unit -> unit Import.Deferred.t) -> unit

at_shutdown f causes f () to be run when shutdown is called, and for shutdown to wait until the returned deferred finishes.