I want to do following things from main thread/process: 1. Communicate to another process using pipe. 2. Create threads to do certain task. 3. Wait for all the threads to complete. Following is the pseudo code I am trying: 

 use threads;
 use IO::Handle;
 sub dummy {
      print "\n!!!!". $$;
      return 0;
 }

 open($handle, "| cat -v") || die "Unable to open connection to BT Dri
+ver: $!\n";

 $handle->autoflush(1);

 #close $handle; If I uncomment this, threads can be joined. But I don
+'t want to terminate this child process.

 $thr2 = threads->create(\&dummy);
 sleep 2;
 print "\n$thr2";
 foreach $thr (threads->list(threads::joinable))
 {
      print "\nIam here";
      print "\n!!!". $thr;
      $thr->join();
 }

[download]

Code gets stuck when I try to join the thread even though it is joinable. Am I doing something fundamentally wrong here? I am using Perl 5.10.0

In reply to I am not able to join a thread when another child process is running which was forked using open. by ashishyadavlko1

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