com.intel.analytics.bigdl.nn.mkldnn.MemoryOwner.scala Maven / Gradle / Ivy

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/*
 * Copyright 2016 The BigDL Authors.
 *
 * 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 com.intel.analytics.bigdl.nn.mkldnn

import scala.collection.mutable.ArrayBuffer


/**
 * The trait for resources that need to be released
 */
private[bigdl] trait Releasable {
  def release(): Unit
}

/**
 * This trait is a owner of the resources that need to be released.
 * It will track all Releasable resources (Primitives, tensor, ReorderMemory).
 * You can call releaseResources to release all the
 * resources at once. These resources will require an implicit MemoryOwner at
 * the constructors. The constructors of the resources will register themselves to the MemoryOwner.
 * For DNN Layer classes, they extends MemoryOwner and have a implicit value of "this" as a
 * MemoryOwner. ReorderMemory is a kind of special resource. They can be a normal layer or a
 * resource of another layer.
 */
private[bigdl] trait MemoryOwner {
  @transient
  private lazy val _resources: ArrayBuffer[Releasable] =
    new ArrayBuffer[Releasable]()

  def registerResource(m: Releasable): Unit = {
    _resources.append(m)
  }

  def releaseResources(): Unit = {
    _resources.foreach(_.release())
    _resources.clear()
  }
}