evsignal(3) [php man page]

EVSIGNAL(3)								 1							       EVSIGNAL(3)

The EvSignal class

INTRODUCTION

       EvSignal  watchers  will trigger an event when the process receives a specific signal one or more times. Even though signals are very asyn-
       chronous, libev will try its best to deliver signals synchronously, i.e. as part of the normal event processing, like any other event.

	There is no limit for the number of watchers for the same signal, but only within the same loop, i.e. one can  watch  for  SIGINT  in  the
       default loop and for SIGIO in another loop, but it is not allowed to watch for SIGINT in both the default loop and another loop at the same
       time. At the moment, SIGCHLD is permanently tied to the default loop.

	If possible and supported, libev will install its handlers with SA_RESTART (or equivalent) behaviour enabled, so system calls  should  not
       be  unduly interrupted. In case of a problem with system calls getting interrupted by signals, all the signals can be blocked in an EvCheck
       watcher and unblocked in a EvPrepare watcher.

CLASS SYNOPSIS

       EvSignal

       EvSignalextends
       EvWatcher

       Properties

       o public$signum

       Inherited properties

       o public$is_active

       o public$data

       o public$is_pending

       o public$priority

       Methods

       o public EvSignal::__construct NULL (int  $signum, callable  $callback, [mixed  $data], [int  $priority])

       o finalpublicstatic EvSignal EvSignal::createStopped NULL (int  $signum, callable  $callback, [mixed  $data], [int  $priority])

       o public void EvSignal::set (int  $signum)

       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 $signum
		- Signal number. See the constants exported by pcntl extension. See also signal(7) man page.

PHP Documentation Group 													       EVSIGNAL(3)

EVSTAT(3)								 1								 EVSTAT(3)

The EvStat class

INTRODUCTION

       EvStat  monitors  a  file  system  path	for attribute changes. It calls stat() on that path in regular intervals(or when the OS signals it
       changed) and sees if it changed compared to the last time, invoking the callback if it did.

	The path does not need to exist: changing from "path exists" to "path does not exist" is a status change like  any  other.  The  condition
       "path does not exist" is signified by the 'nlink' item being 0(returned by EvStat::attr method).

	The  path must not end in a slash or contain special components such as '.' or .. . The path should be absolute: if it is relative and the
       working directory changes, then the behaviour is undefined.

	Since there is no portable change notification interface available, the portable implementation simply calls stat() regularly on the  path
       to  see	if  it	changed somehow. For this case a recommended polling interval can be specified. If one specifies a polling interval of 0.0
       (highly recommended) then a suitable, unspecified default value will be used(which could be expected to be around 5 seconds, although  this
       might change dynamically).  libev will also impose a minimum interval which is currently around 0.1 , but that's usually overkill.

	This  watcher  type  is  not  meant  for  massive  numbers of EvStat watchers, as even with OS-supported change notifications, this can be
       resource-intensive.

CLASS SYNOPSIS

       EvStat

       EvStatextends
       EvWatcher

       Properties

       o public$path

       o public$interval

       Inherited properties

       o public$is_active

       o public$data

       o public$is_pending

       o public$priority

       Methods

       o public array EvStat::attr (void  )

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

       o finalpublicstatic void EvStat::createStopped NULL (string  $path, double  $interval, callable	$callback, [mixed  $data],  [int   $prior-
	 ity])

       o public void EvStat::prev (void  )

       o public void EvStat::set (string  $path, double  $interval)

       o public bool EvStat::stat (void  )

       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 $interval
		- Readonly . Hint on how quickly a change is expected to be detected and should normally be specified as 0.0 to let libev choose a
		suitable value.

	      o $path
		- Readonly . The path to wait for status changes on.

PHP Documentation Group 														 EVSTAT(3)