note almut <blockquote> <i> But the reads/writes dont seem to be happening as planned. </i> </blockquote> <p> As the snippets of code you've posted are incomplete (and thus do not allow to reproduce the issue), it would help if you could describe in more detail what exactly <i>is</i> happening (and what you expect), and also what is setting the values of <c>$signal_received</c> and <c>$total_signals</c>. </p> 851369 851369