<?php

namespace NoccyLabs\Ipc\Signal;


class SignalTrap
{
    protected $signal;

    protected $trapped = false;

    /**
     * Constructor
     *
     * @param integer $signo
     */
    public function __construct(int $signo)
    {
        $this->signal = new Signal($signo);
        $this->signal->setHandler([ $this, "onSignal" ]);
    }

    /**
     * Signal handler callback
     *
     * @return void
     */
    public function onSignal()
    {
        $this->trapped = true;
    }

    /**
     * Check if the signal has been received
     *
     * @param boolean $reset
     * @return boolean
     */
    public function isTrapped($reset=true):bool
    {
        if ($this->trapped) {
            $reset && ($this->trapped = false);
            return true;
        }
        return false;
    }

    public function __invoke($reset=true):bool
    {
        return $this->isTrapped($reset);
    }

}