diff --git a/src/StreamSelectLoop.php b/src/StreamSelectLoop.php
index a11aca3e..3362d3e5 100644
--- a/src/StreamSelectLoop.php
+++ b/src/StreamSelectLoop.php
@@ -62,18 +62,19 @@ final class StreamSelectLoop implements LoopInterface
private $writeListeners = array();
private $running;
private $pcntl = false;
- private $pcntlActive = false;
+ private $pcntlPoll = false;
private $signals;
public function __construct()
{
$this->futureTickQueue = new FutureTickQueue();
$this->timers = new Timers();
- $this->pcntl = \extension_loaded('pcntl');
- $this->pcntlActive = $this->pcntl && !\function_exists('pcntl_async_signals');
+ $this->pcntl = \function_exists('pcntl_signal') && \function_exists('pcntl_signal_dispatch');
+ $this->pcntlPoll = $this->pcntl && !\function_exists('pcntl_async_signals');
$this->signals = new SignalsHandler();
- if ($this->pcntl && !$this->pcntlActive) {
+ // prefer async signals if available (PHP 7.1+) or fall back to dispatching on each tick
+ if ($this->pcntl && !$this->pcntlPoll) {
\pcntl_async_signals(true);
}
}
@@ -228,7 +229,7 @@ private function waitForStreamActivity($timeout)
$write = $this->writeStreams;
$available = $this->streamSelect($read, $write, $timeout);
- if ($this->pcntlActive) {
+ if ($this->pcntlPoll) {
\pcntl_signal_dispatch();
}
if (false === $available) {
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