MathGroup Archive 1999

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Race Condition

  • To: mathgroup at
  • Subject: [mg17007] Race Condition
  • From: rmille1 at (RMille1)
  • Date: Sat, 10 Apr 1999 02:13:38 -0400
  • Organization: AOL
  • References: <7ek3g3$n58$>
  • Sender: owner-wri-mathgroup at

You mentioned a race condition. What exactly does this look like? I'm using the
kernel to send a string to convert to an expressiom and evaluate, then I'm
letting MLNextPacket() block until returns. I did notice that doing this was
causing the kernel to launch a massive number of threads. Over a hundred in
some cases. However, if I checked MLReady() before calling MLNextPacket(), then
called the Windows function Sleep() to idle my code for 1/2 second, the thread
count from the kernel stayed under 10.  

>I have with this is that the kernel does not answer in the same manner when
>waiting for input or evaluating. I do not know how to avoid a race conditions
>that may occure. Also depending on how you start the kernel the MLPutMessage
>works or fails-see another of my posts to the newsgroup (it's recent, so it
>should still be there).
>Hope this helps Tobias

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