[wxperl-users] Parallel programming of processes

[RedMary <mar...@gm...>]

Hi,

I'm trying to make two processes run next to eachother: the first runs a
linux command in the shell (can take quite some time) that writes things to
a file. The second process reads from that file at the same time in
intervals and puts the text line for line in a grid.

My problem is that I can't get these processes to work at the same time
without causing my GUI to freeze. I tried several things, but keep running
into problems:
- I tried threads, but these cause the complete program to crash and return
a segmentation fault.
- I tried forking. This works quite well, except that when my child process
(the shell command) is finished the process is not killed. The "exit"
command returns a "free(): invalid pointer" error and the program does not
return into the parent process.
- I tried timer. This also almost works, except that I cannot stop my timer
when I need to. Perhaps I'm calling the $timer->Stop; from the wrong place?

I hope you can help me with this. Can you please post some simple code
examples, because I'n not very good in object-oriented perl yet (I'm used to
normal perl programming).

Thanx in advance. 
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