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POWait for Asynchronous Event in Lua
 

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  1. POWait for Asynchronous Event in Lua
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    <p>I have a library in Lua that creates and parses data packets for a protocol. When I send a packet out, I'm expecting a reply back from the destination that is then parsed into a table. I'm trying to write a wrapper around this library so that I can make a function call like the following: <code>result = SendUnicast(dest,packetData)</code> and have the parsed response table returned to result. </p> <p>My problem is two fold: 1) The incoming message comes in asynchronously and on a different thread than the executing script and 2) the next packet I receive isn't necessarily the response for my request, I have to parse the incoming packet and match a sequence id.</p> <p>The program flow currently looks something like:</p> <p>[C# UI Thread]</p> <ul> <li>Button Click </li> <li>Run Lua Script <ul> <li>Call SendUnicast </li> <li>Wait For Response</li> </ul></li> </ul> <p>[C# Data Thread]</p> <ul> <li>Incoming Message <ul> <li>Pass message to Lua parser function</li> <li>if sequence matches waiting command, store parsed table, resume blocked</li> </ul></li> </ul> <p>[C# UI Thread]</p> <ul> <li>Lua scipt returns parsed table</li> </ul> <p>I can't seem to find a good method for blocking the currently executing script (in the UIThread). Creating a coroutine to be called when the message is parsed and then <code>while coroutine.status(co) ~= "dead"</code> seems to kill my lua interpreter.</p> <p><strong>EDIT</strong></p> <p>I'm marking BMitch's answer as accepted because it is the correct way to handle this issue. I will warn you, however, that LuaInterface does not support coroutines and I had to add support for them to the C# code myself.</p>
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