How to use

reserve

method

in

net.openhft.chronicle.bytes.MappedBytes

public synchronized LongValue acquireValueFor(CharSequence key, long defaultValue) { // TODO Change to ThreadLocal values if performance is a problem.
  StringBuilder sb = Wires.acquireStringBuilder();
  mappedBytes.reserve();
  try {
    mappedBytes.readPosition(0);

private void removeEOF(Path path) throws IOException {
  long blockSize = 64 << 10;
  long chunkSize = OS.pageAlign(blockSize);
  long overlapSize = OS.pageAlign(blockSize / 4);
  final MappedBytes mappedBytes = MappedBytes.mappedBytes(path.toFile(), chunkSize, overlapSize, false);
  mappedBytes.reserve();
  try {
    final Wire wire = WireType.BINARY_LIGHT.apply(mappedBytes);
    final Bytes<?> bytes = wire.bytes();
    bytes.readLimit(bytes.capacity());
    bytes.readSkip(4);
    // move past header
    try (final SingleChronicleQueueStore qs = loadStore(wire)) {
      assertNotNull(qs);
      long l = qs.writePosition();
      long len = Wires.lengthOf(bytes.readVolatileInt(l));
      long eofOffset = l + len + 4L;
      bytes.writePosition(eofOffset);
      bytes.writeInt(0);
    }
  } finally {
    mappedBytes.release();
  }
}

protected MappedBytes(@NotNull MappedFile mappedFile, String name) throws IllegalStateException {
  super(NoBytesStore.noBytesStore(), NoBytesStore.noBytesStore().writePosition(),
      NoBytesStore.noBytesStore().writeLimit(), name);
  this.mappedFile = reserve(mappedFile);
  this.backingFileIsReadOnly = !mappedFile.file().canWrite();
  assert !mappedFile.isClosed();
  clear();
}

public synchronized LongValue acquireValueFor(CharSequence key, long defaultValue) { // TODO Change to ThreadLocal values if performance is a problem.
  StringBuilder sb = Wires.acquireStringBuilder();
  mappedBytes.reserve();
  try {
    mappedBytes.readPosition(0);