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<== Date ==> <== Thread ==>

Subject: RE: asynManager isConnected
From: <[email protected]>
To: <[email protected]>
Cc: [email protected]
Date: Fri, 1 Jun 2012 15:45:25 +0000
Thanks Lewis, Mark and Eric,

> 
> I don't know of a function in Asyn that allows one to determine
> whether the IP socket is connected.  I always just determine
> this based on the asynStatus returned from a read or write.  But
> maybe there's a way that I don't know about?
> 
> 

That's what I was hoping to do too, but I'm not getting a return from the writeRead function. It blocks forever (at least, more than 15 mins) if I attempt a writeRead using the un-connected IP port. Eric suggested this might be due to the operating system timeout on TCP connections (which I gather can be fixed to infinite). 

I'm probably doing something wrong, because I have the asynManager isConnected problem too. 

The reason I'm interested in understanding this, rather than just working around it, is because I want to handle connections to ethernet PMAC motor controllers automatically if they come up *after* the IOC has already started. Currently we have to restart an IOC if any of our PMACs come up that were turned off when the IOC was started.

Cheers,
Matt

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Replies:
Re: asynManager isConnected Eric Norum
RE: asynManager isConnected Mark Rivers
RE: asynManager isConnected Mark Rivers
References:
asynManager isConnected matthew.pearson
Re: asynManager isConnected J. Lewis Muir

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