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https://github.com/pmmp/PocketMine-MP.git
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92 lines
2.4 KiB
PHP
92 lines
2.4 KiB
PHP
<?php
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/*
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*
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* ____ _ _ __ __ _ __ __ ____
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* | _ \ ___ ___| | _____| |_| \/ (_)_ __ ___ | \/ | _ \
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* | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
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* | __/ (_) | (__| < __/ |_| | | | | | | | __/_____| | | | __/
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* |_| \___/ \___|_|\_\___|\__|_| |_|_|_| |_|\___| |_| |_|_|
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* @author PocketMine Team
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* @link http://www.pocketmine.net/
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*
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*
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*/
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declare(strict_types=1);
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/**
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* Event related classes
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*/
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namespace pocketmine\event;
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use pocketmine\timings\Timings;
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use function count;
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use function get_class;
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abstract class Event{
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private const MAX_EVENT_CALL_DEPTH = 50;
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private static int $eventCallDepth = 1;
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protected ?string $eventName = null;
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final public function getEventName() : string{
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return $this->eventName ?? get_class($this);
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}
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/**
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* Calls event handlers registered for this event.
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*
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* @throws \RuntimeException if event call recursion reaches the max depth limit
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*/
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public function call() : void{
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$this->callDepth(function(){
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$handlers = HandlerListManager::global()->getHandlersFor(static::class);
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foreach($handlers as $registration){
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$registration->callEvent($this);
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}
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});
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}
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/**
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* @template T
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* @phpstan-param \Closure() : T $closure
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* @phpstan-return T
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*/
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final protected function callDepth(\Closure $closure) : mixed{
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if(self::$eventCallDepth >= self::MAX_EVENT_CALL_DEPTH){
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//this exception will be caught by the parent event call if all else fails
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throw new \RuntimeException("Recursive event call detected (reached max depth of " . self::MAX_EVENT_CALL_DEPTH . " calls)");
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}
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$timings = Timings::getEventTimings($this);
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$timings->startTiming();
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++self::$eventCallDepth;
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try{
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return $closure();
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}finally{
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--self::$eventCallDepth;
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$timings->stopTiming();
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}
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}
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/**
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* Returns whether the current class context has any registered global handlers.
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* This can be used in hot code paths to avoid unnecessary event object creation.
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*
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* Usage: SomeEventClass::hasHandlers()
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*/
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public static function hasHandlers() : bool{
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return count(HandlerListManager::global()->getHandlersFor(static::class)) > 0;
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}
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}
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