threaded_call/1-2¶
Description¶
threaded_call(Goal)
threaded_call(Goal, Tag)
Proves Goal
asynchronously using a new thread. The argument can be a
message sending goal. Calls to this predicate always succeeds and return
immediately. The results (success, failure, or exception) are sent back
to the message queue of the object containing the call (this) and
can be retrieved by calling the
threaded_exit/1 predicate.
The threaded_call/2
variant returns a threaded call identifier tag that
can be used with the threaded_exit/2
and threaded_cancel/1 predicates. Tags shall be regarded
as opaque terms; users shall not rely on its type.
Modes and number of proofs¶
threaded_call(@callable) - one
threaded_call(@callable, --nonvar) - one
Errors¶
Goal
is a variable:instantiation_error
Goal
is neither a variable nor a callable term:type_error(callable, Goal)
Tag
is not a variable:type_error(variable, Goal)
Examples¶
Prove
Goal
asynchronously in a new thread:threaded_call(Goal)
Prove
::Message
asynchronously in a new thread:threaded_call(::Message)
Prove
Object::Message
asynchronously in a new thread:threaded_call(Object::Message)