sun.misc.Unsafe.getChar()方法的使用及代码示例

x33g5p2x  于2022-01-31 转载在 其他  
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本文整理了Java中sun.misc.Unsafe.getChar()方法的一些代码示例，展示了Unsafe.getChar()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Unsafe.getChar()方法的具体详情如下：
包路径：sun.misc.Unsafe
类名称：Unsafe
方法名：getChar

Unsafe.getChar介绍

暂无

代码示例

代码示例来源：origin: redisson/redisson

@Override
public char getChar(long byteIndex) {
  return unsafe.getChar(baseAdress + byteIndex);
}

代码示例来源：origin: neo4j/neo4j

public static char getChar( Object obj, long offset )
{
  return unsafe.getChar( obj, offset );
}

代码示例来源：origin: apache/ignite

/**
 * Gets char value from object field.
 *
 * @param obj Object.
 * @param fieldOff Field offset.
 * @return Char value from object field.
 */
public static char getCharField(Object obj, long fieldOff) {
  return UNSAFE.getChar(obj, fieldOff);
}

代码示例来源：origin: bytedeco/javacpp

@Override char getChar(byte[] array, long offset) { return UNSAFE.getChar(array, arrayOffset + offset); }
@Override void putChar(byte[] array, long offset, char c) { UNSAFE.putChar(array, arrayOffset + offset, c); }

代码示例来源：origin: netty/netty

static boolean isZero(byte[] bytes, int startPos, int length) {
  if (length <= 0) {
    return true;
  }
  final long baseOffset = BYTE_ARRAY_BASE_OFFSET + startPos;
  int remainingBytes = length & 7;
  final long end = baseOffset + remainingBytes;
  for (long i = baseOffset - 8 + length; i >= end; i -= 8) {
    if (UNSAFE.getLong(bytes, i) != 0) {
      return false;
    }
  }
  if (remainingBytes >= 4) {
    remainingBytes -= 4;
    if (UNSAFE.getInt(bytes, baseOffset + remainingBytes) != 0) {
      return false;
    }
  }
  if (remainingBytes >= 2) {
    return UNSAFE.getChar(bytes, baseOffset) == 0 &&
        (remainingBytes == 2 || bytes[startPos + 2] == 0);
  }
  return bytes[startPos] == 0;
}

代码示例来源：origin: netty/netty

static boolean equals(byte[] bytes1, int startPos1, byte[] bytes2, int startPos2, int length) {
  if (length <= 0) {
    return true;
  }
  final long baseOffset1 = BYTE_ARRAY_BASE_OFFSET + startPos1;
  final long baseOffset2 = BYTE_ARRAY_BASE_OFFSET + startPos2;
  int remainingBytes = length & 7;
  final long end = baseOffset1 + remainingBytes;
  for (long i = baseOffset1 - 8 + length, j = baseOffset2 - 8 + length; i >= end; i -= 8, j -= 8) {
    if (UNSAFE.getLong(bytes1, i) != UNSAFE.getLong(bytes2, j)) {
      return false;
    }
  }
  if (remainingBytes >= 4) {
    remainingBytes -= 4;
    if (UNSAFE.getInt(bytes1, baseOffset1 + remainingBytes) !=
      UNSAFE.getInt(bytes2, baseOffset2 + remainingBytes)) {
      return false;
    }
  }
  if (remainingBytes >= 2) {
    return UNSAFE.getChar(bytes1, baseOffset1) == UNSAFE.getChar(bytes2, baseOffset2) &&
        (remainingBytes == 2 || bytes1[startPos1 + 2] == bytes2[startPos2 + 2]);
  }
  return bytes1[startPos1] == bytes2[startPos2];
}

代码示例来源：origin: redisson/redisson

public final int getCharValue(Object obj) throws IllegalAccessException {
  if (!isAndroid && memOffset >= 0) {
    return FSTUtil.unFlaggedUnsafe.getChar(obj, memOffset);
  }
  return field.getChar(obj);
}

代码示例来源：origin: redisson/redisson

@Override
public char getChar(long byteIndex) {
  checkIndex(byteIndex,2);
  return unsafe.getChar(base, off + byteIndex);
}

代码示例来源：origin: redisson/redisson

static boolean isZero(byte[] bytes, int startPos, int length) {
  if (length <= 0) {
    return true;
  }
  final long baseOffset = BYTE_ARRAY_BASE_OFFSET + startPos;
  int remainingBytes = length & 7;
  final long end = baseOffset + remainingBytes;
  for (long i = baseOffset - 8 + length; i >= end; i -= 8) {
    if (UNSAFE.getLong(bytes, i) != 0) {
      return false;
    }
  }
  if (remainingBytes >= 4) {
    remainingBytes -= 4;
    if (UNSAFE.getInt(bytes, baseOffset + remainingBytes) != 0) {
      return false;
    }
  }
  if (remainingBytes >= 2) {
    return UNSAFE.getChar(bytes, baseOffset) == 0 &&
        (remainingBytes == 2 || bytes[startPos + 2] == 0);
  }
  return bytes[startPos] == 0;
}

代码示例来源：origin: neo4j/neo4j

public static char getChar( long address )
{
  checkAccess( address, Character.BYTES );
  return unsafe.getChar( address );
}

代码示例来源：origin: apache/ignite

/**
 * Gets char value from byte array. Alignment aware.
 *
 * @param arr Byte array.
 * @param off Offset.
 * @return Char value from byte array.
 */
public static char getChar(byte[] arr, long off) {
  return UNALIGNED ? UNSAFE.getChar(arr, off) : getCharByByte(arr, off, BIG_ENDIAN);
}

代码示例来源：origin: apache/ignite

/**
 * Gets char value from given address. Alignment aware.
 *
 * @param addr Address.
 * @return Char value from given address.
 */
public static char getChar(long addr) {
  return UNALIGNED ? UNSAFE.getChar(addr) : getCharByByte(addr, BIG_ENDIAN);
}

代码示例来源：origin: netty/netty

return ConstantTimeUtils.equalsConstantTime(result |
      (UNSAFE.getInt(bytes1, baseOffset1 + 3) ^ UNSAFE.getInt(bytes2, baseOffset2 + 3)) |
      (UNSAFE.getChar(bytes1, baseOffset1 + 1) ^ UNSAFE.getChar(bytes2, baseOffset2 + 1)) |
      (UNSAFE.getByte(bytes1, baseOffset1) ^ UNSAFE.getByte(bytes2, baseOffset2)), 0);
case 6:
  return ConstantTimeUtils.equalsConstantTime(result |
      (UNSAFE.getInt(bytes1, baseOffset1 + 2) ^ UNSAFE.getInt(bytes2, baseOffset2 + 2)) |
      (UNSAFE.getChar(bytes1, baseOffset1) ^ UNSAFE.getChar(bytes2, baseOffset2)), 0);
case 5:
  return ConstantTimeUtils.equalsConstantTime(result |
case 3:
  return ConstantTimeUtils.equalsConstantTime(result |
      (UNSAFE.getChar(bytes1, baseOffset1 + 1) ^ UNSAFE.getChar(bytes2, baseOffset2 + 1)) |
      (UNSAFE.getByte(bytes1, baseOffset1) ^ UNSAFE.getByte(bytes2, baseOffset2)), 0);
case 2:
  return ConstantTimeUtils.equalsConstantTime(result |
      (UNSAFE.getChar(bytes1, baseOffset1) ^ UNSAFE.getChar(bytes2, baseOffset2)), 0);
case 1:
  return ConstantTimeUtils.equalsConstantTime(result |

代码示例来源：origin: real-logic/agrona

public char getChar(final int index)
{
  boundsCheck0(index, SIZE_OF_CHAR);
  return UNSAFE.getChar(byteArray, ARRAY_BASE_OFFSET + index);
}

代码示例来源：origin: real-logic/agrona

public char getChar(final int index)
{
  if (SHOULD_BOUNDS_CHECK)
  {
    boundsCheck0(index, SIZE_OF_CHAR);
  }
  return UNSAFE.getChar(byteArray, addressOffset + index);
}

代码示例来源：origin: real-logic/agrona

public char getChar(final int index)
{
  boundsCheck0(index, SIZE_OF_CHAR);
  return UNSAFE.getChar(null, address + index);
}

代码示例来源：origin: real-logic/agrona

public char getChar(final long index)
{
  if (SHOULD_BOUNDS_CHECK)
  {
    boundsCheck0(index, SIZE_OF_CHAR);
  }
  return UNSAFE.getChar(null, addressOffset + index);
}

代码示例来源：origin: apache/ignite

/**
 * Gets char value from given address assuming that value stored in little-endian byte order and native byte order
 * is big-endian. Alignment aware.
 *
 * @param addr Address.
 * @return Char value from given address.
 */
public static char getCharLE(long addr) {
  return UNALIGNED ? Character.reverseBytes(UNSAFE.getChar(addr)) : getCharByByte(addr, false);
}

代码示例来源：origin: apache/ignite

/**
 * Gets char value from byte array assuming that value stored in little-endian byte order and native byte order
 * is big-endian. Alignment aware.
 *
 * @param arr Byte array.
 * @param off Offset.
 * @return Char value from byte array.
 */
public static char getCharLE(byte[] arr, long off) {
  return UNALIGNED ? Character.reverseBytes(UNSAFE.getChar(arr, off)) : getCharByByte(arr, off, false);
}

代码示例来源：origin: real-logic/agrona

public char getChar(final int index, final ByteOrder byteOrder)
{
  boundsCheck0(index, SIZE_OF_SHORT);
  char bits = UNSAFE.getChar(byteArray, ARRAY_BASE_OFFSET + index);
  if (NATIVE_BYTE_ORDER != byteOrder)
  {
    bits = (char)Short.reverseBytes((short)bits);
  }
  return bits;
}

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