org.sincron.atomic.AtomicBoolean.scala Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016 by its authors. Some rights reserved.
 * See the project homepage at: https://sincron.org
 *
 * 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 org.sincron.atomic

import org.sincron.atomic.PaddingStrategy.NoPadding
import org.sincron.atomic.boxes.{Factory, BoxedInt}

final class AtomicBoolean private (private[this] val ref: BoxedInt) extends Atomic[Boolean] {
  def get: Boolean =
    ref.volatileGet() == 1

  def set(update: Boolean): Unit =
    ref.volatileSet(if (update) 1 else 0)

  def compareAndSet(expect: Boolean, update: Boolean): Boolean =
    ref.compareAndSet(if (expect) 1 else 0, if (update) 1 else 0)

  def getAndSet(update: Boolean): Boolean =
    ref.getAndSet(if (update) 1 else 0) == 1

  def lazySet(update: Boolean): Unit =
    ref.lazySet(if (update) 1 else 0)

  override def toString: String =
    s"AtomicBoolean($get)"
}

object AtomicBoolean {
  def apply(initialValue: Boolean)(implicit strategy: PaddingStrategy = NoPadding): AtomicBoolean =
    new AtomicBoolean(Factory.newBoxedInt(
      if (initialValue) 1 else 0,
      boxStrategyToPaddingStrategy(strategy)))
}