# The EventConfig class

(PECL event >= 1.2.6-beta)

## Introduction

Represents configuration structure which could be used in construction of the EventBase.

## Class synopsis

final class EventConfig {
/* Constants */
const int FEATURE_ET = 1;
const int FEATURE_O1 = 2;
const int FEATURE_FDS = 4;
/* Methods */
public avoidMethod( string `$method` ): bool
public __construct()
public requireFeatures( int `$feature` ): bool
public setFlags( int `$flags` ): bool
public setMaxDispatchInterval( int `$max_interval` , int `$max_callbacks` , int `$min_priority` ): void
}

## Predefined Constants

`EventConfig::FEATURE_ET`

  Requires a backend method that supports edge-triggered I/O.

`EventConfig::FEATURE_O1`

  Requires a backend method where adding or deleting a single event, or having a single event become active, is an O(1) operation.

`EventConfig::FEATURE_FDS`

  Requires a backend method that can support arbitrary file descriptor types, and not just sockets.

## Table of Contents

- EventConfig::avoidMethod — Tells libevent to avoid specific event method
- EventConfig::__construct — Constructs EventConfig object
- EventConfig::requireFeatures — Enters a required event method feature that the application demands
- EventConfig::setFlags — Sets one or more flags to configure the eventual EventBase will be initialized
- EventConfig::setMaxDispatchInterval — Prevents priority inversion

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