[Openmcl-devel] Trouble killing a processes

Daniel Weinreb dlw at itasoftware.com
Wed Oct 27 08:57:36 PDT 2010

Since I am having some issues with process killing,
I tried this, including running it many times.
(I had to add "ccl:" in a few places.)  It works
fine with the release I'm using, 14324.

-- Dan

Michael Minerva wrote:
> Hey all,
> I have been having trouble killing a process in the application that I 
> am currently working on, so I decided to make a simpler example using 
> just basic ccl methods, and I experience the same problem.  I was 
> wondering if anyone could help me understand what is going on.  My 
> little program just makes a process which just prints to the console 
> then sleeps in a loop, then I assign this process to a local variable, 
> then I kill the process and print it out.  Often times, even after I 
> have issues the command process-kill to the reference  to the process, 
> the process continues printing.  Sometimes when I print the process 
> after killing it, it says it is still active, sometimes it s says it 
> is exhausted and sometimes it says it is reset.  According to the 
> documentation I found about this method it is supposed to "Causes a 
> specified process to cleanly exit from any ongoing computation, and 
> then exit.".  Can anyone help me understand why this is not happening? 
>   Here is my example program.  If you try it out make sure to run it 
> many times because it will often work correctly on the first try. 
>  Also, when you see the behavior I have been experiencing you will 
> need to quit ccl to end the process.  
> (defun make-a-process()
>   (process-run-function
>    '(:name "my-process" :priority 1)
>    #'(lambda ()
>        (loop
>          (print "doing process things.")
>          (print *current-process*)
>          (sleep .01)))))
> (defun process-test ()
>   (let ((my-process
>          (make-a-process)))
>     (print "kill process")
>     (process-kill my-process)
>     (print *current-process*)
>     (print "after kill")
>     (print my-process)
>     nil))
> (process-test)
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