Re^3: cleanly exiting threads

Yeah it's gets tricky because each thread gets a copy of the parent at the time of creation, it's a Perl problem, not a c thread problem. That means a thread may have duplicated code from a previous thread in it, just sitting around keeping a refcount > 0. Hard to track down.

The only absolutely foolproof way of doing it, is to create all threads at the beginning of the script, then REUSE the threads, over and over. See Reusable threads demo for the basic idea.

Otherwise, you may be best just turning off the warning, and watch for weird glitches or memory gains as your script runs.

All I can say is good luck, because I have run into similar problems many times, and now immediately use sleeping reusable threads right from the start of design. I don't even consider detaching, as it almost always leads to memory gains unless you somehow reuse the thread's scalar namespace. Also spawning threads is pretty intensive, so you want to minimize it......reuse threads and join at exit.

I'm not really a human, but I play one on earth Remember How Lucky You Are

Comment on Re^3: cleanly exiting threads

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Re^4: cleanly exiting threads by JoeKamel (Acolyte) on Aug 17, 2008 at 07:01 UTC
Okay, I've followed your primer, oh wise one. and guess what. No threads left. I'm not sure thank you really expresses my sentiments. Believe it or not, your "simple" example is actually rather complex compared to what I'm doing. In the spirit of an even simpler "example" (granted probably not that easy to read). Here is the (hopefully) final version of the code. I guess the 3rd re-write was the charm. I'm not sure if the below example will parse (probably not), but hopefully its enough to help the next poor fellow Read more... (6 kB) I really liked the way you setup your thread hash, and would have done that if I had found your original post 1st, but as it was, this seems to work (which is all that really matters) Thanks again. I really appreciate it.	[reply] [d/l]
Re^5: cleanly exiting threads by zentara (Cardinal) on Aug 17, 2008 at 12:05 UTC
I'm glad you got it going. Threads are such a buzzword now, and everyone wants to use them thinking they simplify design. Now that you see how to make them work, you can help straighten everyone out. :-) I'm not really a human, but I play one on earth Remember How Lucky You Are	[reply]