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Molecule support for monadic processes

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/*
 * Copyright (C) 2013 Alcatel-Lucent.
 *
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 * Licensed to you 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 molecule
package io.impl

import platform.UThread

/**
 * Type of objects that are automatically flushed once a user-level thread yields.
 *
 * A user-level thread yields when it has no more message to consume or when the
 * lightweight process it is executing yields.
 *
 * @author Sebastien Bocq
 */
private[io] trait Flushable {
  protected[io] def flush(uthread: UThread): Unit
}