PHP Manual
Ev
The EvPeriodic class

The EvPeriodic class

(PECL ev >= 0.2.0)

简介

Periodic watchers are also timers of a kind, but they are very versatile.

Unlike EvTimer , EvPeriodic watchers are not based on real time(or relative time, the physical time that passes) but on wall clock time(absolute time, calendar or clock). The difference is that wall clock time can run faster or slower than real time, and time jumps are not uncommon(e.g. when adjusting it).

EvPeriodic watcher can be configured to trigger after some specific point in time. For example, if an EvPeriodic watcher is configured to trigger "in 10 seconds" (e.g. EvLoop::now() + 10.0 , i.e. an absolute time, not a delay), and the system clock is reset to January of the previous year , then it will take a year or more to trigger the event (unlike an EvTimer , which would still trigger roughly 10 seconds after starting it as it uses a relative timeout).

As with timers, the callback is guaranteed to be invoked only when the point in time where it is supposed to trigger has passed. If multiple timers become ready during the same loop iteration then the ones with earlier time-out values are invoked before ones with later time-out values (but this is no longer true when a callback calls EvLoop::run() recursively).

类摘要

EvPeriodic extends EvWatcher {

/* 属性 */

public $offset ;

public $interval ;

/* 继承的属性 */

public $is_active ;

public $data ;

public $is_pending ;

public $priority ;

/* 方法 */

public again ( void ) : void

public at ( void ) : float

public __construct ( float $offset , string $interval , callable $reschedule_cb , callable $callback [, mixed $data = NULL [, int $priority = 0 ]] )

final public static createStopped ( float $offset , float $interval , callable $reschedule_cb , callable $callback [, mixed $data = NULL [, int $priority = 0 ]] ) : EvPeriodic

public set ( float $offset , float $interval ) : void

/* 继承的方法 */

public EvWatcher::clear ( void ) : int

abstract public EvWatcher::__construct ( void )

public EvWatcher::feed ( int $revents ) : void

public EvWatcher::getLoop ( void ) : EvLoop

public EvWatcher::invoke ( int $revents ) : void

public EvWatcher::keepalive ([ bool $value ] ) : bool

public EvWatcher::setCallback ( callable $callback ) : void

public EvWatcher::start ( void ) : void

public EvWatcher::stop ( void ) : void

}

属性

offset: When repeating, this contains the offset value, otherwise this is the absolute point in time(the offset value passed to EvPeriodic::set() , although libev might modify this value for better numerical stability).
interval: The current interval value. Can be modified any time, but changes only take effect when the periodic timer fires or EvPeriodic::again() is being called.

EvPeriodic::again — Simply stops and restarts the periodic watcher again
EvPeriodic::at — Returns the absolute time that this watcher is supposed to trigger next
EvPeriodic::__construct — Constructs EvPeriodic watcher object
EvPeriodic::createStopped — Create a stopped EvPeriodic watcher
EvPeriodic::set — Configures the watcher

php 异常 the badfunctioncallexception class php cairo the cairoformat class php cairo the cairoradialgradient class php com the com class php ev the ev class php ev the evcheck class php ev the evchild class php ev the evembed class php ev the evfork class php ev the evidle class php ev the evio class php ev the evloop class php ev the evperiodic class php ev the evprepare class php ev the evsignal class php ev the evstat class php ev the evtimer class php ev the evwatcher class php hyperwave api 函数 creates instance of class hw api attribute php soapserver sets the class which handles soap requests

The EvPeriodic class

简介

类摘要

属性

Table of Contents