public ByteList doReceiveNonblock(ThreadContext context, int length) {
Ruby runtime = context.runtime;
Channel channel = getChannel();
if (!(channel instanceof SelectableChannel)) {
if (runtime.is1_9()) {
throw runtime.newErrnoEAGAINReadableError(
channel.getClass().getName() + " does not support nonblocking");
} else {
throw runtime.newErrnoEAGAINError(
channel.getClass().getName() + " does not support nonblocking");
}
}
SelectableChannel selectable = (SelectableChannel) channel;
synchronized (selectable.blockingLock()) {
boolean oldBlocking = selectable.isBlocking();
try {
selectable.configureBlocking(false);
try {
return doReceive(context, length);
} finally {
selectable.configureBlocking(oldBlocking);
}
} catch (IOException e) {
throw runtime.newIOErrorFromException(e);
}
}
}
/**
* Closes the channel (safe).
*
* <p>This method tries to close the given channel and if an IOException occurs a message with the
* level {@link Level#FINE} is logged. It's safe to pass a <code>null</code> reference for the
* argument.
*
* @param channel the channel that should be closed.
*/
public static void close(Channel channel) {
if (channel != null) {
try {
channel.close();
} catch (IOException x) {
logCloseFailedWarningMessage(Channel.class, channel.getClass(), x);
}
}
}
