module ScheduledFuture: sig .. end
Computations run in background with a delay.
val cancel : 'a t -> bool -> bool
val is_cancelled : 'a t -> bool
val is_done : 'a t -> bool
val get_delay : 'a t -> TimeUnit.t -> java_long
Returns the remaining delay for the computation, in the passed time
unit; see
getDelay(...).
Null value
val null : 'a t
The null
value.
val is_null : 'a t -> bool
is_null obj
returns true
iff obj
is equal to null
.
val is_not_null : 'a t -> bool
is_not_null obj
returns false
iff obj
is equal to null
.
Miscellaneous
val wrap : 'a t -> 'a t option
wrap obj
wraps the reference
obj
into an option type:
Some x
if obj
is not null
;
None
if obj
is null
.
val unwrap : 'a t option -> 'a t
unwrap obj
unwraps the option
obj
into a bare reference:
Some x
is mapped to x
;
None
is mapped to null
.