public Message Transact(Message msg, out MSG_ERROR_MESSAGE msg_err, int time_out)
{
msg_err = (MSG_ERROR_MESSAGE)null;
Message msg1 = (Message)null;
this.commIF.OnFrameReceived += new delegateMessageReceived(this.ProcessFrame);
this.Send(msg);
switch (WaitHandle.WaitAny(new WaitHandle[2]
{
(WaitHandle)this.rsp_event,
(WaitHandle)this.err_event
}, time_out))
{
case 0:
LLRPBinaryDecoder.Decode(ref this.rsp_data, out msg1);
break;
case 1:
int cursor = 0;
BitArray bitArray = Util.ConvertByteArrayToBitArray(this.rsp_data);
int count = bitArray.Count;
msg_err = MSG_ERROR_MESSAGE.FromBitArray(ref bitArray, ref cursor, count);
break;
}
this.commIF.OnFrameReceived -= new delegateMessageReceived(this.ProcessFrame);
return(msg1);
}
/// <summary>
/// Performs a message transaction with the reader. Sends the msg and waitws
/// for a response, an error message or a timeout
/// </summary>
/// <param name="msg">Message to send</param>
/// <param name="msg_err">Output contains error message if sent by reader</param>
/// <param name="time_out">Timeout value to abort waiting for response</param>
/// <returns>Response Message or NULL if error or timeout </returns>
public Message Transact(Message msg, out MSG_ERROR_MESSAGE msg_err, int time_out)
{
msg_err = null;
Message rsp_msg = null;
// subscribe to the comminucations interface delegate to look for the response
commIF.OnFrameReceived += new delegateMessageReceived(this.ProcessFrame);
Send(msg);
// wait for either response or error
WaitHandle[] wait = new WaitHandle[] { rsp_event, err_event };
int wait_result = WaitHandle.WaitAny(wait, time_out);
switch (wait_result)
{
case 0:
/* got a response. already checked the mssage type */
LLRPBinaryDecoder.Decode(ref rsp_data, out rsp_msg);
break;
case 1:
{
int cursor = 0;
int length;
BitArray bArr;
/* got an error */
bArr = Util.ConvertByteArrayToBitArray(rsp_data);
length = bArr.Count;
msg_err = MSG_ERROR_MESSAGE.FromBitArray(ref bArr, ref cursor, length);
}
break;
}
// remove the event handler when our transaction is over
commIF.OnFrameReceived -= new delegateMessageReceived(this.ProcessFrame);
return(rsp_msg);
}