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POLuaLanes Unable to pass global variables between functions (in a single lane)
 

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  1. POLuaLanes Unable to pass global variables between functions (in a single lane)
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    <p>hope you're having a good day.</p> <p>I have been programming a IRC chatbot in Lua the past few days, and finally I want to start implementing multiple server support into it.</p> <p>So far, I have created the irc "object" to manage each server, and all that happy stuff - Now, I am having problems with threading. </p> <p>Lua, as you probably know, doesn't have thread support built-in. LuaLanes and LuaThreads seemed like the closest to what I wanted to use, in terms of libraries. What made me choose LuaLanes is because LuaThreads requires a modified lua core. Plus the "lindas" feature of LuaLanes caught my eye (for later use in plugins)</p> <p>Anyway, the issue that I'm having is when you generate a lane using function <code>middleman</code> (for example), which then calls another function <code>sqr</code> (for example). if you generate the function like <code>lanes.gen({globals = _G}, middleman)</code>, middleman will have access to everything in your current global scope, which is exactly what I want. The problem is, if <code>middleman</code> calls <code>sqr</code>, and <code>sqr</code> uses something from the global scope, it throws an error, almost as if <code>_G</code> suddenly became empty.</p> <p>Here's some example code I managed to throw together, using my example above:</p> <pre><code>require 'lanes' function sqr() print(5*5) end function middleman() sqr() end gen = lanes.gen({globals = _G}, middleman) print(gen()[1]) </code></pre> <p>Produces an error saying:</p> <pre><code>tc@box:~$ lua lanestrouble.lua lua: lanestrouble.lua:4: attempt to call global 'print' (a nil value) stack traceback: [C]: in function 'error' ./lanes.lua:190: in function &lt;./lanes.lua:136&gt; lanestrouble.lua:13: in main chunk [C]: ? threading.c 399: pthread_cond_destroy(ref) failed, 16 EBUSY Aborted tc@box:~$ </code></pre> <p>(By the way, I'm using linux)</p> <p>However, if you change line 11 from <code>gen = lanes.gen({globals = _G}, middleman)</code> to <code>gen = lanes.gen({globals = _G}, sqr)</code>, it works fine.</p> <p>I've checked, and the same thing happens if you pass "*" (or any other option for the "libs_str" parameter) to load the default libraries.</p> <p>I really wish there was something like Java's threading library for Lua, that's how I originally learned to use threads. (I know, not the most ideal environment I suppose)</p> <p>Thanks, I appreciate help a lot. Especially since this has completely halted my IRC bot development! :(</p>
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