The EvWatcher class

(PECL ev >= 0.2.0)

はじめに

EvWatcher is a base class for all watchers( EvCheck, EvChild etc.). Since EvWatcher 's constructor is abstract, one can't(and don't need to) create EvWatcher objects directly.

クラス概要

abstract class EvWatcher {

/* プロパティ */

public $is_active;

public $data;

public $is_pending;

public $priority;

/* メソッド */

abstract public function __construct()

public function clear(): int

public function feed( int $revents ): void

public function getLoop(): EvLoop

public function invoke( int $revents ): void

public function keepalive( bool $value = ?): bool

public function setCallback( callable $callback ): void

public function start(): void

public function stop(): void

}

プロパティ

is_active: Readonly. true if the watcher is active. false otherwise.
data: User custom data associated with the watcher
is_pending: Readonly .true if the watcher is pending, i.e. it has outstanding events, but its callback has not yet been invoked. false otherwise. As long, as a watcher is pending(but not active), one must not change its priority.
priority: int between Ev::MINPRI and Ev::MAXPRI. Pending watchers with higher priority will be invoked before watchers with lower priority, but priority will not keep watchers from being executed(except for EvIdle watchers). EvIdle watchers provide functionality to suppress invocation when higher priority events are pending.

EvWatcher::clear — Clear watcher pending status
EvWatcher::__construct — Abstract constructor of a watcher object
EvWatcher::feed — Feeds the given revents set into the event loop
EvWatcher::getLoop — Returns the loop responsible for the watcher
EvWatcher::invoke — Invokes the watcher callback with the given received events bit mask
EvWatcher::keepalive — Configures whether to keep the loop from returning
EvWatcher::setCallback — Sets new callback for the watcher
EvWatcher::start — Starts the watcher
EvWatcher::stop — Stops the watcher

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