com.intel.analytics.zoo.feature.pmem.NativeByteArray.scala Maven / Gradle / Ivy

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/*
 * Copyright 2018 Analytics Zoo 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.zoo.feature.pmem

import org.apache.spark.unsafe.Platform

class VarLenBytesArray(recordNum: Int, totalSizeByBytes: Long,
    memoryType: MemoryType = PMEM) extends NativeVarLenArray[Byte](recordNum,
  totalSizeByBytes, memoryType, 0) {

  def putSingle(offset: Long, s: Byte): Unit = {
    Platform.putByte(null, offset, s.asInstanceOf[Byte])
  }

  override def getTypeOffSet(): Int = Platform.BYTE_ARRAY_OFFSET
}

class FixLenBytesArray(val numOfRecord: Long, val sizeOfRecordByByte: Int,
    memoryType: MemoryType = PMEM) extends
  NativeArray[Array[Byte]](numOfRecord * sizeOfRecordByByte, memoryType) {

  override def get(i: Int): Array[Byte] = {
    val result = new Array[Byte](sizeOfRecordByByte)
    Platform.copyMemory(null, indexOf(i), result, Platform.BYTE_ARRAY_OFFSET, sizeOfRecordByByte)
    return result
  }

  // TODO: would be slow if we put byte one by one.
  def set(i: Int, bytes: Array[Byte]): Unit = {
    assert(!deleted)
    val startOffset = indexOf(i)
    var j = 0
    while(j < bytes.length) {
      Platform.putByte(null, startOffset + j, bytes(j))
      j += 1
    }
  }

  def indexOf(i: Int): Long = {
    val index = startAddr + (i * sizeOfRecordByByte)
    assert(index <= lastOffSet)
    index
  }
}