net.openhft.chronicle.bytes

Class PointerBytesStore

java.lang.Object

net.openhft.chronicle.bytes.AbstractBytesStore<NativeBytesStore<Underlying>,Underlying>

net.openhft.chronicle.bytes.NativeBytesStore<Void>

net.openhft.chronicle.bytes.PointerBytesStore

All Implemented Interfaces:

CharSequence, BytesStore<NativeBytesStore<Void>,Void>, RandomDataInput, RandomDataOutput<NativeBytesStore<Void>>, net.openhft.chronicle.core.ReferenceCounted

public class PointerBytesStore
extends NativeBytesStore<Void>

A BytesStore which can point to arbitrary memory.

Field Summary

Fields inherited from class net.openhft.chronicle.bytes.NativeBytesStore

address, maximumLimit, memory, releasedHere

Fields inherited from interface net.openhft.chronicle.bytes.RandomDataInput

charToString

Constructor Summary

Constructors

Constructor and Description
PointerBytesStore()

Method Summary

Modifier and Type	Method and Description
default long	addressForRead(long offset, int buffer)
default ByteOrder	byteOrder()
VanillaBytes<Void>	bytesForWrite()
default boolean	compareAndSwapDouble(long offset, double expected, double value) Perform a 64-bit double CAS at a given offset.
default boolean	compareAndSwapFloat(long offset, float expected, float value) Perform a 32-bit float CAS at a given offset.
boolean	isPresent()
void	isPresent(boolean isPresent) Clear and set the flag for present.
default long	readLimit()
long	safeLimit()
void	set(long address, long capacity)
long	start()
default long	writeLimit()
default long	writePosition() The read position must be readPosition() <= writePosition() && writePosition() <= writeLimit()
default long	writeRemaining()

Methods inherited from class net.openhft.chronicle.bytes.NativeBytesStore

addAndGetInt, addAndGetLong, addressForRead, addressForWrite, appendUTF, appendUtf8, byteCheckSum, byteCheckSum, capacity, checkReleased, compareAndSwapInt, compareAndSwapLong, copy, copyTo, copyToDirect, elasticByteBuffer, elasticByteBuffer, equals, fastHash, from, from, init, isDirectMemory, lazyNativeBytesStoreWithFixedCapacity, move, nativeRead, nativeStore, nativeStoreWithFixedCapacity, nativeWrite, peekUnsignedByte, read, readByte, readDouble, readFloat, readIncompleteLong, readInt, readLong, readShort, readUnsignedByte, readVolatileByte, readVolatileInt, readVolatileLong, readVolatileShort, realCapacity, refCount, release, reserve, setAddress, sharedMemory, testAndSetInt, toString, toTemporaryDirectByteBuffer, translate, tryReserve, underlyingObject, uninit, uninitialized, wrap, write, write, write, write0, writeByte, writeDouble, writeFloat, writeInt, writeLong, writeOrderedInt, writeOrderedLong, writeShort, writeVolatileByte, writeVolatileInt, writeVolatileLong, writeVolatileShort, zeroOut

Methods inherited from class net.openhft.chronicle.bytes.AbstractBytesStore

hashCode, readPosition, readRemaining

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.openhft.chronicle.bytes.BytesStore

addAndGetByteNotAtomic, addAndGetDoubleNotAtomic, addAndGetFloatNotAtomic, addAndGetIntNotAtomic, addAndGetLongNotAtomic, addAndGetShortNotAtomic, addAndGetUnsignedByteNotAtomic, addAndGetUnsignedIntNotAtomic, addAndGetUnsignedShortNotAtomic, bytesForRead, bytesStore, charAt, cipher, cipher, contentEquals, copyTo, empty, endsWith, equalBytes, from, inside, inside, isClear, isEmpty, length, longCheckSum, nativePointer, readWrite, startsWith, startsWith, subSequence, to8bitString, toDebugString, toDebugString, wrap, wrap, writeMaxLong

Methods inherited from interface net.openhft.chronicle.bytes.RandomDataInput

addAndGetDouble, addAndGetFloat, compareUtf8, copyTo, copyTo, createCharToString, findByte, parseLong, peekVolatileInt, printable, readBoolean, readUnsignedInt, readUnsignedInt24, readUnsignedShort, readUtf8, readUtf8Limited, readUtf8Limited, readVolatileDouble, readVolatileFloat, subBytes, toByteArray

Methods inherited from interface net.openhft.chronicle.bytes.RandomDataOutput

append, append, write, write, writeBoolean, writeByte, writeInt24, writeOrderedDouble, writeOrderedFloat, writeUnsignedByte, writeUnsignedInt, writeUnsignedShort, writeUtf8, writeUtf8Limited, writeVolatileDouble, writeVolatileFloat

Methods inherited from interface net.openhft.chronicle.core.ReferenceCounted

release, releaseAll

Methods inherited from interface java.lang.CharSequence

chars, codePoints

Constructor Detail

PointerBytesStore

public PointerBytesStore()

Method Detail

set

public void set(long address,
                long capacity)

bytesForWrite

@NotNull
public VanillaBytes<Void> bytesForWrite()
                                          throws IllegalStateException

Specified by:

bytesForWrite in interface BytesStore<NativeBytesStore<Void>,Void>

Overrides:

bytesForWrite in class NativeBytesStore<Void>

Returns:

a Bytes for writing to this BytesStore

Throws:

IllegalStateException

safeLimit

public long safeLimit()

Specified by:

safeLimit in interface BytesStore<NativeBytesStore<Void>,Void>

Overrides:

safeLimit in class NativeBytesStore<Void>

Returns:

how many bytes can be safely read, i.e. what is the real capacity of the underlying data.

start

public long start()

Overrides:

start in class AbstractBytesStore<NativeBytesStore<Void>,Void>

Returns:

The smallest position allowed in this buffer.

isPresent

public void isPresent(boolean isPresent)

Description copied from interface: BytesStore

Clear and set the flag for present.

Parameters:

isPresent - if there is data, or false if not.

isPresent

public boolean isPresent()

Returns:

if there is data, or false if not.

writePosition

public long writePosition()

The read position must be readPosition() <= writePosition() && writePosition() <= writeLimit()

Returns:

position to write to.

writeRemaining

public long writeRemaining()

Returns:

How many more bytes can we written.

readLimit

public long readLimit()

Returns:

the highest offset or position allowed for this buffer.

writeLimit

public long writeLimit()

addressForRead

public long addressForRead(long offset,
                           int buffer)
                    throws UnsupportedOperationException,
                           BufferUnderflowException

Throws:

UnsupportedOperationException

BufferUnderflowException

byteOrder

public ByteOrder byteOrder()

compareAndSwapFloat

public boolean compareAndSwapFloat(long offset,
                                   float expected,
                                   float value)
                            throws BufferOverflowException

Perform a 32-bit float CAS at a given offset.

Parameters:

offset - to perform CAS

expected - value

value - to set

Returns:

true, if successful.

Throws:

BufferOverflowException

compareAndSwapDouble

public boolean compareAndSwapDouble(long offset,
                                    double expected,
                                    double value)
                             throws BufferOverflowException

Perform a 64-bit double CAS at a given offset.

Parameters:

offset - to perform CAS

expected - value

value - to set

Returns:

true, if successful.

Throws:

BufferOverflowException