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Re^2: threads: spawn early to avoid the crush.

by BrowserUk (Patriarch)
on Mar 02, 2006 at 14:08 UTC ( [id://533885]=note: print w/replies, xml ) Need Help??


in reply to Re: threads: spawn early to avoid the crush.
in thread threads: spawn early to avoid the crush.

If the main program needed another process it would ask the original parent to do it for it.

Could you explain that in a bit more detail for me? I've never done much with fork, especially in Perl.

  • How does the main code inform it's parent when it is time to create another process?
  • If there can be multiple other processes that might need to be run, how does the main code tell teh parent which one to create?
  • How does the new process get it's parameters?
  • How does the main code retrieve the results from the new process?
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  • Comment on Re^2: threads: spawn early to avoid the crush.

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Re^3: threads: spawn early to avoid the crush.
by Anonymous Monk on Mar 02, 2006 at 16:46 UTC
    Here's a simple answer to interprocess communication: use pipes. 
    #!/usr/bin/perl -w
#use forking open to start 3 more processes

unless (open X, "-|") { print 1+5;     exit }; # X=1+5
unless (open Y, "-|") { print 2*3;     exit }; # Y=2*3
unless (open Z, "-|") { print <X>+<Y>; exit }; # Z=X+Y

print "Z = "; print <Z>."\n";

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