Function futures::executor::enter [−][src]
pub fn enter() -> Result<Enter, EnterError>
This is supported on crate feature
executor
only.Expand description
Marks the current thread as being within the dynamic extent of an executor.
Executor implementations should call this function before beginning to
execute a tasks, and drop the returned Enter
value after
completing task execution:
use futures::executor::enter;
let enter = enter().expect("...");
/* run task */
drop(enter);
Doing so ensures that executors aren’t accidentally invoked in a nested fashion.
Error
Returns an error if the current thread is already marked, in which case the caller should panic with a tailored error message.