protected void implDereg(SelectionKeyImpl ski) throws IOException { // Algorithm: Copy the sc from the end of the list and put it into // the location of the sc to be removed (since order doesn't // matter). Decrement the sc count. Update the index of the sc // that is moved. int i = ski.getIndex(); assert (i >= 0); if (i != totalChannels - 1) { // Copy end one over it SelectionKeyImpl endChannel = channelArray[totalChannels - 1]; channelArray[i] = endChannel; endChannel.setIndex(i); pollWrapper.release(i); PollArrayWrapper.replaceEntry(pollWrapper, totalChannels - 1, pollWrapper, i); } else { pollWrapper.release(i); } // Destroy the last one channelArray[totalChannels - 1] = null; totalChannels--; pollWrapper.totalChannels--; ski.setIndex(-1); // Remove the key from keys and selectedKeys keys.remove(ski); selectedKeys.remove(ski); deregister((AbstractSelectionKey) ski); SelectableChannel selch = ski.channel(); if (!selch.isOpen() && !selch.isRegistered()) ((SelChImpl) selch).kill(); }