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<?php
namespace Laravel\Horizon;
use Illuminate\Support\Arr;
trait ListensForSignals
{
/**
* The pending signals that need to be processed.
*
* @var array
*/
protected $pendingSignals = [];
/**
* Listen for incoming process signals.
*
* @return void
*/
protected function listenForSignals()
{
pcntl_async_signals(true);
pcntl_signal(SIGTERM, function () {
$this->pendingSignals['terminate'] = 'terminate';
});
pcntl_signal(SIGUSR1, function () {
$this->pendingSignals['restart'] = 'restart';
});
pcntl_signal(SIGUSR2, function () {
$this->pendingSignals['pause'] = 'pause';
});
pcntl_signal(SIGCONT, function () {
$this->pendingSignals['continue'] = 'continue';
});
}
/**
* Process the pending signals.
*
* @return void
*/
protected function processPendingSignals()
{
while ($this->pendingSignals) {
$signal = Arr::first($this->pendingSignals);
$this->{$signal}();
unset($this->pendingSignals[$signal]);
}
}
}