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public static Create ( |
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| remaining | ||
| newPacket | ||
| Результат | ||
/// <summary>
/// Clone this packet, creating an exact copy.
/// As the clone function is an implementation of IClonable it must return an object.
/// </summary>
/// <returns></returns>
public object Clone()
{
DataPacket p = DataPacket.Create(Data);
p.Sender = this.Sender;
p.Destination = this.Destination;
return(p);
}
/// <summary>
/// Skips a given size from the data block
/// </summary>
/// <param name="size"></param>
public DataPacket SkipSize(UInt32 size)
{
DataPacket p = DataPacket.Create(Data.Length - (int)size);
p.Sender = this.Sender;
p.Destination = this.Destination;
Buffer.BlockCopy(this.Data, (int)size, p.Data, 0, p.Data.Length);
return(p);
}
internal virtual void Disconnect()
{
if (Disposed)
{
return;
}
if (ioc != null)
{
ioc.RemoveChannel(this);
}
lock (ConnectionLock)
{
if (Status != ChannelStatus.CONNECTED)
{
return;
}
Status = ChannelStatus.DISCONNECTED;
StartSearchTime = DateTime.Now;
ioc = null;
SID = 0;
if (PrivMonitorChanged != null)
{
AfterConnect(action =>
{
if (MonitoredType == null)
{
return;
}
DataPacket p = DataPacket.Create(16 + 16);
p.Command = (ushort)CommandID.CA_PROTO_EVENT_ADD;
p.DataType = (ushort)TypeHandling.Lookup[MonitoredType];
p.DataCount = ChannelDataCount;
p.Parameter1 = SID;
p.Parameter2 = CID;
p.SetUInt16(12 + 16, (ushort)MonitorMask);
if (ioc != null)
{
ioc.Send(p);
}
else
{
Disconnect();
}
});
}
}
}
internal EpicsChannel(EpicsClient client, string channelName)
{
this.ChannelName = channelName;
this.Status = ChannelStatus.REQUESTED;
this.Client = client;
MonitorMask = MonitorMask.VALUE;
HasValue = false;
SearchPacket = DataPacket.Create(16 + ChannelName.Length + TypeHandling.Padding(ChannelName.Length));
SearchPacket.Command = (ushort)CommandID.CA_PROTO_SEARCH;
SearchPacket.DataType = (ushort)EpicsConstants.DONT_REPLY;
SearchPacket.DataCount = (ushort)EpicsConstants.CA_MINOR_PROTOCOL_REVISION;
SearchPacket.Parameter1 = cid;
SearchPacket.Parameter2 = cid;
SearchPacket.SetDataAsString(ChannelName);
}
internal void SendReadNotify <TType>(uint nbElements)
{
if (Client.Configuration.DebugTiming)
{
lock (ElapsedTimings)
{
if (!ElapsedTimings.ContainsKey("SendReadNotify"))
{
ElapsedTimings.Add("SendReadNotify", Stopwatch.Elapsed);
}
}
}
DataPacket packet = DataPacket.Create(16);
packet.Command = (ushort)CommandID.CA_PROTO_READ_NOTIFY;
Type t = typeof(TType);
if (typeof(TType).IsArray)
{
t = (typeof(TType)).GetElementType();
}
else if (t.IsGenericType)
{
if (t.GetGenericArguments().First() == typeof(object))
{
t = t.GetGenericTypeDefinition().MakeGenericType(new Type[] { channelDefinedType });
}
}
if (t == typeof(object))
{
t = channelDefinedType;
}
packet.DataType = (ushort)TypeHandling.Lookup[t];
packet.DataCount = nbElements;
packet.Parameter1 = SID;
uint ioid = (NextIoId++);
packet.Parameter2 = ioid;
lock (ioc.PendingIo)
{
ioc.PendingIo.Add(ioid, this);
}
ioc.Send(packet);
}
void SendMonitor(EpicsChannel action)
{
if (ChannelDataCount == 0)
{
return;
}
//Console.WriteLine("Sending new event add");
DataPacket p = DataPacket.Create(16 + 16);
p.Command = (ushort)CommandID.CA_PROTO_EVENT_ADD;
Type t = typeof(TType);
if (t.IsArray)
{
t = t.GetElementType();
}
else if (t.IsGenericType)
{
if (t.GetGenericArguments().First() == typeof(object))
{
t = t.GetGenericTypeDefinition().MakeGenericType(new Type[] { channelDefinedType });
}
}
p.DataType = (ushort)TypeHandling.Lookup[t];
p.DataCount = ChannelDataCount;
p.Parameter1 = SID;
p.Parameter2 = CID;
p.SetUInt16(12 + 16, (ushort)MonitorMask);
if (ioc != null)
{
ioc.Send(p);
}
}
internal void SetIoc(DataPipe pipe)
{
TcpReceiver tcpReceiver = (TcpReceiver)pipe[0];
tcpReceiver.AddChannel(this);
lock (ConnectionLock)
{
if (!Client.Searcher.Contains(this))
{
return;
}
Client.Searcher.Remove(this);
SID = 0;
ioc = tcpReceiver;
lock (ioc.ChannelSID)
{
//Console.WriteLine(ioc.ChannelSID.Count);
// Channel already known
if (ioc.ChannelSID.ContainsKey(ChannelName))
{
SID = ioc.ChannelSID[ChannelName];
//Console.WriteLine("Here");
EpicsChannel chan = ioc.ConnectedChannels.FirstOrDefault(row => row.ChannelName == ChannelName && row.ChannelDataCount != 0);
if (chan != null)
{
this.ChannelDataCount = chan.ChannelDataCount;
this.channelDefinedType = chan.channelDefinedType;
this.ChannelDataCount = chan.ChannelDataCount;
this.channelDefinedType = chan.ChannelDefinedType;
Status = ChannelStatus.CONNECTED;
ConnectionEvent.Set();
}
}
}
}
if (SID != 0)
{
//Console.WriteLine("SID " + SID + " STATUS CHANGED");
if (StatusChanged != null)
{
StatusChanged(this, Status);
}
return;
}
if (Client.Configuration.DebugTiming)
{
lock (ElapsedTimings)
{
if (!ElapsedTimings.ContainsKey("IocConnection"))
{
ElapsedTimings.Add("IocConnection", Stopwatch.Elapsed);
}
}
}
// We need to create the channel
int padding;
if (ChannelName.Length % 8 == 0)
{
padding = 8;
}
else
{
padding = (8 - (ChannelName.Length % 8));
}
DataPacket packet = DataPacket.Create(16 + ChannelName.Length + padding);
packet.Command = (ushort)CommandID.CA_PROTO_CREATE_CHAN;
packet.DataType = 0;
packet.DataCount = 0;
packet.Parameter1 = cid;
packet.Parameter2 = (uint)EpicsConstants.CA_MINOR_PROTOCOL_REVISION;
packet.SetDataAsString(ChannelName);
if (ioc != null)
{
ioc.Send(packet);
}
else
{
Disconnect();
return;
}
lock (ElapsedTimings)
{
if (!ElapsedTimings.ContainsKey("SendCreateChannel"))
{
ElapsedTimings.Add("SendCreateChannel", Stopwatch.Elapsed);
}
}
}
protected DataPacket WritePacket <TType>(TType newValue)
{
int headerSize = 16;
uint nbElem = 1;
if (newValue is IEnumerable <object> )
{
nbElem = (uint)((IEnumerable <object>)newValue).Count();
}
Type t = typeof(TType);
if (t.IsArray)
{
nbElem = (uint)((Array)((object)newValue)).Length;
// if too many array elements, use extended header
if (nbElem > 0xffff)
{
headerSize = 24;
}
t = t.GetElementType();
}
else if (t.IsGenericType)
{
if (t.GetGenericArguments().First() == typeof(object))
{
t = t.GetGenericTypeDefinition().MakeGenericType(new Type[] { channelDefinedType });
}
}
if (t == typeof(object))
{
t = channelDefinedType;
}
int payloadSize = (int)(nbElem * TypeHandling.EpicsSize(t));
if (payloadSize % 8 > 0)
{
payloadSize += 8 - (payloadSize % 8);
}
// if payload too large, use extended header
if (payloadSize > 0x4000)
{
headerSize = 24;
}
DataPacket packet = DataPacket.Create(headerSize + payloadSize);
packet.Command = (ushort)CommandID.CA_PROTO_WRITE_NOTIFY;
packet.DataCount = nbElem;
packet.DataType = (ushort)TypeHandling.Lookup[t];
packet.Parameter1 = SID;
uint ioid = (NextIoId++);
packet.Parameter2 = ioid;
if (nbElem > 1)
{
int pos = headerSize;
int elementSize = TypeHandling.EpicsSize(t);
foreach (var elem in (System.Collections.IEnumerable)newValue)
{
switch (TypeHandling.Lookup[t])
{
case EpicsType.Int:
packet.SetInt32(pos, (int)elem);
break;
case EpicsType.Short:
packet.SetInt16(pos, (short)elem);
break;
case EpicsType.Float:
packet.SetFloat(pos, (float)elem);
break;
case EpicsType.Double:
packet.SetDouble(pos, (double)elem);
break;
case EpicsType.Byte:
packet.SetByte(pos, (byte)elem);
break;
default:
throw new Exception("Type not supported");
}
pos += elementSize;
}
}
else
{
switch (TypeHandling.Lookup[t])
{
case EpicsType.Int:
packet.SetInt32((int)packet.HeaderSize, (int)(object)newValue);
break;
case EpicsType.Short:
packet.SetInt16((int)packet.HeaderSize, (short)(object)newValue);
break;
case EpicsType.Float:
packet.SetFloat((int)packet.HeaderSize, (float)(object)newValue);
break;
case EpicsType.Double:
packet.SetDouble((int)packet.HeaderSize, (double)(object)newValue);
break;
case EpicsType.String:
packet.SetDataAsString((string)(object)newValue);
break;
case EpicsType.Byte:
packet.SetByte((int)packet.HeaderSize, (byte)(object)newValue);
break;
default:
throw new Exception("Type not currently supported.");
}
}
return(packet);
}
