nwaku/waku/common/nimchronos.nim

## An extension wrapper around nim-chronos
{.push raises: [].}

import chronos, chronicles

export chronos

## Extension methods

# Taken from: https://github.com/status-im/nim-libp2p/blob/master/libp2p/utils/heartbeat.nim
template heartbeat*(name: string, interval: Duration, body: untyped): untyped =
  var nextHeartbeat = Moment.now()
  while true:
    body

    nextHeartbeat += interval
    let now = Moment.now()
    if nextHeartbeat < now:
      let
        delay = now - nextHeartbeat
        itv = interval

      if delay > itv:
        info "Missed multiple heartbeats",
          heartbeat = name, delay = delay, hinterval = itv
      else:
        debug "Missed heartbeat", heartbeat = name, delay = delay, hinterval = itv

      nextHeartbeat = now + itv

    await sleepAsync(nextHeartbeat - now)