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use super::{TimerQueue, TimerQueueTicks};
/// A backend definition for a monotonic clock/counter.
pub trait TimerQueueBackend: 'static + Sized {
/// The type for ticks.
type Ticks: TimerQueueTicks;
/// Get the current time.
fn now() -> Self::Ticks;
/// Set the compare value of the timer interrupt.
///
/// **Note:** This method does not need to handle race conditions of the monotonic, the timer
/// queue in RTIC checks this.
fn set_compare(instant: Self::Ticks);
/// Clear the compare interrupt flag.
fn clear_compare_flag();
/// Pend the timer's interrupt.
fn pend_interrupt();
/// Optional. Runs on interrupt before any timer queue handling.
fn on_interrupt() {}
/// Optional. This is used to save power, this is called when the timer queue is not empty.
///
/// Enabling and disabling the monotonic needs to propagate to `now` so that an instant
/// based of `now()` is still valid.
///
/// NOTE: This may be called more than once.
fn enable_timer() {}
/// Optional. This is used to save power, this is called when the timer queue is empty.
///
/// Enabling and disabling the monotonic needs to propagate to `now` so that an instant
/// based of `now()` is still valid.
///
/// NOTE: This may be called more than once.
fn disable_timer() {}
/// Returns a reference to the underlying timer queue.
fn timer_queue() -> &'static TimerQueue<Self>;
}
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