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✏️ Editing: Libevent.php

<?php
/**
 * This file is part of workerman.
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the MIT-LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @author    walkor<walkor@workerman.net>
 * @copyright walkor<walkor@workerman.net>
 * @link      http://www.workerman.net/
 * @license   http://www.opensource.org/licenses/mit-license.php MIT License
 */
namespace Workerman\Events;

use Workerman\Worker;

/**
 * libevent eventloop
 */
class Libevent implements EventInterface
{
    /**
     * Event base.
     *
     * @var resource
     */
    protected $_eventBase = null;

/**
     * All listeners for read/write event.
     *
     * @var array
     */
    protected $_allEvents = array();

/**
     * Event listeners of signal.
     *
     * @var array
     */
    protected $_eventSignal = array();

/**
     * All timer event listeners.
     * [func, args, event, flag, time_interval]
     *
     * @var array
     */
    protected $_eventTimer = array();

/**
     * construct
     */
    public function __construct()
    {
        $this->_eventBase = \event_base_new();
    }

/**
     * {@inheritdoc}
     */
    public function add($fd, $flag, $func, $args = array())
    {
        switch ($flag) {
            case self::EV_SIGNAL:
                $fd_key                      = (int)$fd;
                $real_flag                   = \EV_SIGNAL | \EV_PERSIST;
                $this->_eventSignal[$fd_key] = \event_new();
                if (!\event_set($this->_eventSignal[$fd_key], $fd, $real_flag, $func, null)) {
                    return false;
                }
                if (!\event_base_set($this->_eventSignal[$fd_key], $this->_eventBase)) {
                    return false;
                }
                if (!\event_add($this->_eventSignal[$fd_key])) {
                    return false;
                }
                return true;
            case self::EV_TIMER:
            case self::EV_TIMER_ONCE:
                $event    = \event_new();
                $timer_id = (int)$event;
                if (!\event_set($event, 0, \EV_TIMEOUT, array($this, 'timerCallback'), $timer_id)) {
                    return false;
                }

if (!\event_base_set($event, $this->_eventBase)) {
                    return false;
                }

$time_interval = $fd * 1000000;
                if (!\event_add($event, $time_interval)) {
                    return false;
                }
                $this->_eventTimer[$timer_id] = array($func, (array)$args, $event, $flag, $time_interval);
                return $timer_id;

default :
                $fd_key    = (int)$fd;
                $real_flag = $flag === self::EV_READ ? \EV_READ | \EV_PERSIST : \EV_WRITE | \EV_PERSIST;

$event = \event_new();

if (!\event_set($event, $fd, $real_flag, $func, null)) {
                    return false;
                }

if (!\event_base_set($event, $this->_eventBase)) {
                    return false;
                }

if (!\event_add($event)) {
                    return false;
                }

$this->_allEvents[$fd_key][$flag] = $event;

return true;
        }

}

/**
     * {@inheritdoc}
     */
    public function del($fd, $flag)
    {
        switch ($flag) {
            case self::EV_READ:
            case self::EV_WRITE:
                $fd_key = (int)$fd;
                if (isset($this->_allEvents[$fd_key][$flag])) {
                    \event_del($this->_allEvents[$fd_key][$flag]);
                    unset($this->_allEvents[$fd_key][$flag]);
                }
                if (empty($this->_allEvents[$fd_key])) {
                    unset($this->_allEvents[$fd_key]);
                }
                break;
            case  self::EV_SIGNAL:
                $fd_key = (int)$fd;
                if (isset($this->_eventSignal[$fd_key])) {
                    \event_del($this->_eventSignal[$fd_key]);
                    unset($this->_eventSignal[$fd_key]);
                }
                break;
            case self::EV_TIMER:
            case self::EV_TIMER_ONCE:
                // 这里 fd 为timerid 
                if (isset($this->_eventTimer[$fd])) {
                    \event_del($this->_eventTimer[$fd][2]);
                    unset($this->_eventTimer[$fd]);
                }
                break;
        }
        return true;
    }

/**
     * Timer callback.
     *
     * @param mixed $_null1
     * @param int   $_null2
     * @param mixed $timer_id
     */
    protected function timerCallback($_null1, $_null2, $timer_id)
    {
        if ($this->_eventTimer[$timer_id][3] === self::EV_TIMER) {
            \event_add($this->_eventTimer[$timer_id][2], $this->_eventTimer[$timer_id][4]);
        }
        try {
            \call_user_func_array($this->_eventTimer[$timer_id][0], $this->_eventTimer[$timer_id][1]);
        } catch (\Exception $e) {
            Worker::stopAll(250, $e);
        } catch (\Error $e) {
            Worker::stopAll(250, $e);
        }
        if (isset($this->_eventTimer[$timer_id]) && $this->_eventTimer[$timer_id][3] === self::EV_TIMER_ONCE) {
            $this->del($timer_id, self::EV_TIMER_ONCE);
        }
    }

/**
     * {@inheritdoc}
     */
    public function clearAllTimer()
    {
        foreach ($this->_eventTimer as $task_data) {
            \event_del($task_data[2]);
        }
        $this->_eventTimer = array();
    }

/**
     * {@inheritdoc}
     */
    public function loop()
    {
        \event_base_loop($this->_eventBase);
    }

/**
     * Destroy loop.
     *
     * @return void
     */
    public function destroy()
    {
        foreach ($this->_eventSignal as $event) {
            \event_del($event);
        }
    }

/**
     * Get timer count.
     *
     * @return integer
     */
    public function getTimerCount()
    {
        return \count($this->_eventTimer);
    }
}

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