public void AgainException()
{
var before = new AgainException("Hello");
Assert.AreEqual(ErrorCode.TryAgain, before.ErrorCode);
Assert.AreEqual("Hello", before.Message);
}
protected override void XSetSocketOption(ZmqSocketOptions option, Object optval)
{
if (option != ZmqSocketOptions.Subscribe && option != ZmqSocketOptions.Unsubscribe)
{
throw InvalidException.Create();
}
byte[] val;
if (optval is String)
{
val = Encoding.ASCII.GetBytes((String)optval);
}
else if (optval is byte[])
{
val = (byte[])optval;
}
else
{
throw InvalidException.Create();
}
// Create the subscription message.
Msg msg = new Msg();
msg.InitPool(val.Length + 1);
if (option == ZmqSocketOptions.Subscribe)
{
msg.Put((byte)1);
}
else if (option == ZmqSocketOptions.Unsubscribe)
{
msg.Put((byte)0);
}
msg.Put(val, 1, val.Length);
try
{
// Pass it further on in the stack.
bool isMessageSent = base.XSend(ref msg, 0);
if (!isMessageSent)
{
throw AgainException.Create();
}
}
finally
{
msg.Close();
}
}
public virtual void PushMsg(Msg msg)
{
// First message to receive is identity (if required).
if (!m_identityReceived)
{
msg.SetFlags(MsgFlags.Identity);
m_identityReceived = true;
if (!m_options.RecvIdentity)
{
return;
}
}
if (m_pipe != null && m_pipe.Write(msg))
{
return;
}
throw AgainException.Create();
}
public Msg Recv(SendReceiveOptions flags)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
Msg msg;
// Get the message.
bool isMessageAvailable = XRecv(flags, out msg);
// Once every inbound_poll_rate messages check for signals and process
// incoming commands. This happens only if we are not polling altogether
// because there are messages available all the time. If poll occurs,
// ticks is set to zero and thus we avoid this code.
//
// Note that 'recv' uses different command throttling algorithm (the one
// described above) from the one used by 'send'. This is because counting
// ticks is more efficient than doing RDTSC all the time.
if (++m_ticks == Config.InboundPollRate)
{
ProcessCommands(0, false);
m_ticks = 0;
}
// If we have the message, return immediately.
if (isMessageAvailable && msg != null)
{
ExtractFlags(msg);
return(msg);
}
// If the message cannot be fetched immediately, there are two scenarios.
// For non-blocking recv, commands are processed in case there's an
// activate_reader command already waiting int a command pipe.
// If it's not, return EAGAIN.
if ((flags & SendReceiveOptions.DontWait) > 0 || m_options.ReceiveTimeout == 0)
{
ProcessCommands(0, false);
m_ticks = 0;
isMessageAvailable = XRecv(flags, out msg);
if (!isMessageAvailable)
{
throw AgainException.Create();
}
else if (msg == null)
{
return(null);
}
ExtractFlags(msg);
return(msg);
}
// Compute the time when the timeout should occur.
// If the timeout is infite, don't care.
int timeout = m_options.ReceiveTimeout;
long end = timeout < 0 ? 0 : (Clock.NowMs() + timeout);
// In blocking scenario, commands are processed over and over again until
// we are able to fetch a message.
bool block = (m_ticks != 0);
while (true)
{
ProcessCommands(block ? timeout : 0, false);
isMessageAvailable = XRecv(flags, out msg);
if (isMessageAvailable && msg != null)
{
m_ticks = 0;
break;
}
block = true;
if (timeout > 0)
{
timeout = (int)(end - Clock.NowMs());
if (timeout <= 0)
{
throw AgainException.Create();
}
}
}
ExtractFlags(msg);
return(msg);
}
public void Send(Msg msg, SendReceiveOptions flags)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
// Check whether message passed to the function is valid.
if (msg == null)
{
throw NetMQException.Create(ErrorCode.EFAULT);
}
// Process pending commands, if any.
ProcessCommands(0, true);
// Clear any user-visible flags that are set on the message.
msg.ResetFlags(MsgFlags.More);
// At this point we impose the flags on the message.
if ((flags & SendReceiveOptions.SendMore) > 0)
{
msg.SetFlags(MsgFlags.More);
}
// Try to send the message.
bool isMessageSent = XSend(msg, flags);
if (isMessageSent)
{
return;
}
// In case of non-blocking send we'll simply propagate
// the error - including EAGAIN - up the stack.
if ((flags & SendReceiveOptions.DontWait) > 0 || m_options.SendTimeout == 0)
{
throw AgainException.Create();
}
// Compute the time when the timeout should occur.
// If the timeout is infite, don't care.
int timeout = m_options.SendTimeout;
long end = timeout < 0 ? 0 : (Clock.NowMs() + timeout);
// Oops, we couldn't send the message. Wait for the next
// command, process it and try to send the message again.
// If timeout is reached in the meantime, return EAGAIN.
while (true)
{
ProcessCommands(timeout, false);
isMessageSent = XSend(msg, flags);
if (isMessageSent)
{
break;
}
if (timeout > 0)
{
timeout = (int)(end - Clock.NowMs());
if (timeout <= 0)
{
throw AgainException.Create();
}
}
}
}
