evperiodic(3) [php man page]

EVPERIODIC(3)								 1							     EVPERIODIC(3)

The EvPeriodic class

INTRODUCTION

	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 multi-
       ple  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).

CLASS SYNOPSIS

       EvPeriodic

       EvPeriodicextends
       EvWatcher

       Properties

       o public$offset

       o public$interval

       Inherited properties

       o public$is_active

       o public$data

       o public$is_pending

       o public$priority

       Methods

       o public void EvPeriodic::again (void  )

       o public double EvPeriodic::at (void  )

       o public EvPeriodic::__construct NULL (double  $offset, string  $interval, callable  $reschedule_cb, callable  $callback,  [mixed   $data],
	 [int  $priority])

       o finalpublicstatic  EvPeriodic	EvPeriodic::createStopped  NULL  (double   $offset,  double  $interval, callable  $reschedule_cb, callable
	 $callback, [mixed  $data], [int  $priority])

       o public void EvPeriodic::set (double  $offset, double  $interval)

       Inherited methods

       o public int EvWatcher::clear (void  )

       o abstractpublic EvWatcher::__construct (void  )

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

       o public EvLoop EvWatcher::getLoop (void  )

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

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

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

       o public void EvWatcher::start (void  )

       o public void EvWatcher::stop (void  )

PROPERTIES

	      o $offset
		- When repeating, this contains the offset value, otherwise this is the absolute point in time(the offset value passed to  EvPeri-
		odic::set , although libev might modify this value for better numerical stability).

	      o $interval
		-  The	current  interval  value.  Can be modified any time, but changes only take effect when the periodic timer fires or EvPeri-
		odic::again is being called.

PHP Documentation Group 													     EVPERIODIC(3)

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EVCHILD(3)								 1								EVCHILD(3)

The EvChild class

INTRODUCTION

       EvChild	watchers trigger when the process receives a SIGCHLD in response to some child status changes (most typically when a child dies or
       exits). It is permissible to install an EvChild watcher after the child has been forked(which implies it might  have  already  exited),	as
       long as the event loop isn't entered(or is continued from a watcher), i.e. forking and then immediately registering a watcher for the child
       is fine, but forking and registering a watcher a few event loop iterations later or in the next callback invocation is not.

	It is allowed to register EvChild watchers in the default loop only.

CLASS SYNOPSIS

       EvChild

       EvChildextends
       EvWatcher

       Properties

       o public$pid

       o public$rpid

       o public$rstatus

       Inherited properties

       o public$is_active

       o public$data

       o public$is_pending

       o public$priority

       Methods

       o public EvChild::__construct NULL (int	$pid, bool  $trace, callable  $callback, [mixed  $data], [int  $priority])

       o finalpublicstatic object EvChild::createStopped (int  $pid, bool  $trace, callable  $callback, [mixed	$data], [int  $priority])

       o public void EvChild::set (int	$pid, bool  $trace)

       Inherited methods

       o public int EvWatcher::clear (void  )

       o abstractpublic EvWatcher::__construct (void  )

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

       o public EvLoop EvWatcher::getLoop (void  )

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

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

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

       o public void EvWatcher::start (void  )

       o public void EvWatcher::stop (void  )

PROPERTIES

	      o $pid
		- Readonly . The process ID this watcher watches out for, or 0 , meaning any process ID.

	      o $rpid
		- Readonly .The process ID that detected a status change.

	      o $rstatus
		- Readonly . The process exit status caused by $rpid .

PHP Documentation Group 														EVCHILD(3)

Linux and UNIX Man Pages

evperiodic(3) [php man page]

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