A scheduler for events. It runs in its own thread.

A new timer.

set_exn_handler timer f registers f so that any exception raised by a task scheduled in timer is given to f.

Call the callback f after the given number of seconds.

• raises Stopped

  if the timer was stopped.

Create a future that evaluates to () at the given Unix timestamp.

• raises Stopped

  if the timer was stopped.

every timer n ~f calls f () every n seconds. f() can raise ExitEvery to stop the cycle.

• parameter delay

  if provided, the first call to f () is delayed by that many seconds.

• raises Stopped

  if the timer was stopped.

Stop the given timer, cancelling pending tasks. Idempotent. From now on, calling most other operations on the timer will raise Stopped.

Return true until stop t has been called.