Dunno, but safe_set does a lot of work for nothing. It assumes $h{$k} is already a reference to a shared var, so why does it create a new one? 

sub safe_inc {
  lock ${$h{$k}};
  ${$h{$k}} = ${$h{$k}} + 1;
}

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In reply to Re^5: Avoid Locking Entire Hashes by ikegami
in thread Avoid Locking Entire Hashes by jagan_1234

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