com.pingcap.tikv.util

类 MemoryUtil

java.lang.Object

com.pingcap.tikv.util.MemoryUtil

public class MemoryUtil
extends Object

字段概要

字段

限定符和类型	字段和说明
static ByteBuffer	EMPTY_BYTE_BUFFER_DIRECT
static sun.misc.Unsafe	unsafe

构造器概要

构造器

构造器和说明
MemoryUtil()

方法概要

限定符和类型	方法和说明
static long	allocate(long size)
static ByteBuffer	allocateDirect(int cap)
static void	copyMemory(long fromAddr, long toAddr, int count)
static void	copyMemory(Object src, long srcOffset, Object dst, long dstOffset, long length)
static ByteBuffer	duplicateDirectByteBuffer(ByteBuffer source)
static ByteBuffer	duplicateDirectByteBuffer(ByteBuffer source, ByteBuffer hollowBuffer)
static void	free(ByteBuffer buffer) Good manner to free a buffer before forget it.
static void	free(long addr)
static long	getAddress(ByteBuffer buffer)
static Object	getAttachment(ByteBuffer instance)
static FileChannel	getBlockReaderLocal_dataIn(Object br)
static boolean	getBlockReaderLocal_verifyChecksum(Object br)
static byte	getByte(long address)
static ByteBuffer	getByteBuffer(long address, int length, boolean autoFree)
static void	getBytes(long address, byte[] buffer, int bufferOffset, int count) Transfers objCount bytes from Memory starting at memoryOffset to buffer starting at bufferOffset
static int	getCap(ByteBuffer buffer)
static BigDecimal	getDecimal128(long address, int scale)
static BigDecimal	getDecimal256(long address, int scale)
static BigDecimal	getDecimal32(long address, int scale)
static BigDecimal	getDecimal64(long address, int scale)
static double	getDouble(long address)
static float	getFloat(long address)
static ByteBuffer	getHollowDirectByteBuffer()
static int	getInt(long address)
static int	getIntByByte(long address)
static long	getLong(long address)
static long	getLongByByte(long address)
static short	getShort(long address)
static int	getShortByByte(long address)
static char[]	getStringValue(String str)
static long	getTotalPhysicalMemorySize()
static int	pageSize()
static void	putIntByByte(long address, int value)
static void	putLongByByte(long address, long value)
static void	readFully(ByteBuffer dst, CodecDataInput cdi, int length)
static void	setAttachment(ByteBuffer instance, Object next)
static void	setBlockReaderLocal_verifyChecksum(Object br, boolean value)
static void	setByte(long address, byte b)
static void	setByteBuffer(ByteBuffer instance, long address, int length, sun.misc.Cleaner cleaner)
static void	setBytes(byte[] src, int offset, long trg, long count)
static void	setBytes(long address, byte[] buffer, int bufferOffset, int count) Transfers objCount bytes from buffer to Memory
static void	setBytes(long address, ByteBuffer buffer)
static void	setBytes(long src, long trg, long count)
static void	setDecimal(long address, BigDecimal v, int scale)
static void	setDecimal256(long address, BigDecimal v, int scale)
static void	setDouble(long address, double v)
static void	setFloat(long address, float v)
static void	setInt(long address, int l)
static void	setLong(long address, long l)
static void	setMemory(long addr, long size, byte v)
static void	setMemory(Object base, long offset, long size, byte v)
static void	setShort(long address, short s)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

EMPTY_BYTE_BUFFER_DIRECT

public static final ByteBuffer EMPTY_BYTE_BUFFER_DIRECT

unsafe

public static final sun.misc.Unsafe unsafe

构造器详细资料

MemoryUtil

public MemoryUtil()

方法详细资料

getBlockReaderLocal_verifyChecksum

public static boolean getBlockReaderLocal_verifyChecksum(Object br)

setBlockReaderLocal_verifyChecksum

public static void setBlockReaderLocal_verifyChecksum(Object br,
                                                      boolean value)

getBlockReaderLocal_dataIn

public static FileChannel getBlockReaderLocal_dataIn(Object br)

pageSize

public static int pageSize()

setMemory

public static void setMemory(long addr,
                             long size,
                             byte v)

setMemory

public static void setMemory(Object base,
                             long offset,
                             long size,
                             byte v)

getAddress

public static long getAddress(ByteBuffer buffer)

getCap

public static int getCap(ByteBuffer buffer)

allocate

public static long allocate(long size)

free

public static void free(long addr)

free

public static void free(ByteBuffer buffer)

Good manner to free a buffer before forget it.

setByte

public static void setByte(long address,
                           byte b)

setShort

public static void setShort(long address,
                            short s)

setInt

public static void setInt(long address,
                          int l)

setDecimal

public static void setDecimal(long address,
                              BigDecimal v,
                              int scale)

setDecimal256

public static void setDecimal256(long address,
                                 BigDecimal v,
                                 int scale)

setLong

public static void setLong(long address,
                           long l)

setFloat

public static void setFloat(long address,
                            float v)

setDouble

public static void setDouble(long address,
                             double v)

getByte

public static byte getByte(long address)

getShort

public static short getShort(long address)

getInt

public static int getInt(long address)

getDecimal32

public static BigDecimal getDecimal32(long address,
                                      int scale)

getDecimal64

public static BigDecimal getDecimal64(long address,
                                      int scale)

getDecimal128

public static BigDecimal getDecimal128(long address,
                                       int scale)

getDecimal256

public static BigDecimal getDecimal256(long address,
                                       int scale)

getLong

public static long getLong(long address)

getFloat

public static float getFloat(long address)

getDouble

public static double getDouble(long address)

getByteBuffer

public static ByteBuffer getByteBuffer(long address,
                                       int length,
                                       boolean autoFree)

getHollowDirectByteBuffer

public static ByteBuffer getHollowDirectByteBuffer()

setByteBuffer

public static void setByteBuffer(ByteBuffer instance,
                                 long address,
                                 int length,
                                 sun.misc.Cleaner cleaner)

getAttachment

public static Object getAttachment(ByteBuffer instance)

setAttachment

public static void setAttachment(ByteBuffer instance,
                                 Object next)

duplicateDirectByteBuffer

public static ByteBuffer duplicateDirectByteBuffer(ByteBuffer source,
                                                   ByteBuffer hollowBuffer)

duplicateDirectByteBuffer

public static ByteBuffer duplicateDirectByteBuffer(ByteBuffer source)

getLongByByte

public static long getLongByByte(long address)

getIntByByte

public static int getIntByByte(long address)

getShortByByte

public static int getShortByByte(long address)

putLongByByte

public static void putLongByByte(long address,
                                 long value)

putIntByByte

public static void putIntByByte(long address,
                                int value)

setBytes

public static void setBytes(long address,
                            ByteBuffer buffer)

setBytes

public static void setBytes(long address,
                            byte[] buffer,
                            int bufferOffset,
                            int count)

Transfers objCount bytes from buffer to Memory

参数:

address - start offset in the memory

buffer - the data buffer

bufferOffset - start offset of the buffer

count - number of bytes to transfer

setBytes

public static void setBytes(long src,
                            long trg,
                            long count)

setBytes

public static void setBytes(byte[] src,
                            int offset,
                            long trg,
                            long count)

getBytes

public static void getBytes(long address,
                            byte[] buffer,
                            int bufferOffset,
                            int count)

Transfers objCount bytes from Memory starting at memoryOffset to buffer starting at bufferOffset

参数:

address - start offset in the memory

buffer - the data buffer

bufferOffset - start offset of the buffer

count - number of bytes to transfer

getStringValue

public static char[] getStringValue(String str)

copyMemory

public static void copyMemory(long fromAddr,
                              long toAddr,
                              int count)

copyMemory

public static void copyMemory(Object src,
                              long srcOffset,
                              Object dst,
                              long dstOffset,
                              long length)

getTotalPhysicalMemorySize

public static long getTotalPhysicalMemorySize()

allocateDirect

public static ByteBuffer allocateDirect(int cap)

readFully

public static void readFully(ByteBuffer dst,
                             CodecDataInput cdi,
                             int length)