Scheduler.scala

/*
 * Copyright 2020-2022 Typelevel
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cats.effect.unsafe

import scala.concurrent.duration.FiniteDuration

trait Scheduler {

  /**
   * Schedules a side-effect to run after the delay interval. Produces another side-effect which
   * cancels the scheduling.
   */
  def sleep(delay: FiniteDuration, task: Runnable): Runnable

  def nowMillis(): Long

  def monotonicNanos(): Long
}

object Scheduler extends SchedulerCompanionPlatform