How to use

writePosition

method

in

net.openhft.chronicle.bytes.MappedBytes

long address = bytes.addressForWrite(bytes.writePosition());
long bstart = bytes.start();
long bcap = bytes.realCapacity();
long canWrite = bcap - (bytes.writePosition() - bstart);
long lengthCount = batchAppender.writeMessages(address, canWrite, writeCount);
bytes.writeSkip((int) lengthCount);

if (wire != null && writeCount > 0) {
  MappedBytes bytes = (MappedBytes) wire.bytes();
  long address = bytes.addressForWrite(bytes.writePosition());
  long bstart = bytes.start();
  long bcap = bytes.realCapacity();
  long canWrite = bcap - (bytes.writePosition() - bstart);
  long lengthCount = writeMessages(address, canWrite, writeCount);
  bytes.writeSkip((int) lengthCount);

mappedBytes.writePosition(mappedBytes.readPosition());
long pos = recovery.writeHeader(mappedWire, safeLength, timeoutMS, null, null);
LongValue longValue = wireType.newLongReference().get();

public long rawCopy(@NotNull BytesStore bytes, long offset, long length)
    throws BufferOverflowException, BufferUnderflowException {
  assert length < safeCopySize();
  this.acquireNextByteStore(writePosition(), false);
  long len = Math.min(writeRemaining(), Math.min(bytes.readRemaining(), length));
  if (len > 0) {
    OS.memory().copyMemory(bytes.addressForRead(offset), addressForWrite(writePosition()), len);
    uncheckedWritePosition(writePosition() + len);
  }
  return len;
}

@NotNull
@Override
public Bytes<Void> append8bit(@NotNull CharSequence cs, int start, int end)
    throws IllegalArgumentException, BufferOverflowException, BufferUnderflowException,
    IndexOutOfBoundsException {
  assert singleThreadedAccess();
  // check the start.
  long pos = writePosition();
  writeCheckOffset(pos, 0);
  if (!(cs instanceof String) || pos + (end - start) * 3 + 5 >= safeLimit()) {
    return super.append8bit(cs, start, end);
  }
  return append8bit0((String) cs, start, end - start);
}

@Override
@NotNull
public MappedBytes write8bit(CharSequence s, int start, int length) {
  assert singleThreadedAccess();
  if (s == null) {
    writeStopBit(-1);
    return this;
  }
  // check the start.
  long pos = writePosition();
  writeCheckOffset(pos, 0);
  if (!(s instanceof String) || pos + length * 3 + 5 >= safeLimit()) {
    super.write8bit(s, start, length);
    return this;
  }
  writeStopBit(length);
  return append8bit0((String) s, start, length);
}

if (Jvm.isJava9Plus()) {
  byte[] bytes = extractBytes(s);
  long address = addressForWrite(writePosition());
  Memory memory = bytesStore().memory;
  int i = 0;
} else {
  char[] chars = extractChars(s);
  long address = addressForWrite(writePosition());
  Memory memory = bytesStore().memory;
  int i = 0;

long address = bytes.addressForWrite(bytes.writePosition());
long bstart = bytes.start();
long bcap = bytes.realCapacity();
long canWrite = bcap - (bytes.writePosition() - bstart);
long lengthCount = batchAppender.writeMessages(address, canWrite, writeCount);
bytes.writeSkip((int) lengthCount);

assert singleThreadedAccess();
long pos = writePosition();
writeCheckOffset(pos, 0);
if (!(cs instanceof String) || pos + length * 3 + 5 >= safeLimit()) {

mappedBytes.writePosition(mappedBytes.readPosition());
long pos = recovery.writeHeader(mappedWire, safeLength, timeoutMS, null, null);
LongValue longValue = wireType.newLongReference().get();