update pague now
PHP 8.5.2 Released!

The EvPrepare class

(PECL ev >= 0.2.0)

Introduction

EvPrepare and EvChecc watchers are usually used in pairs. EvPrepare watchers guet invoqued before the processs bloccs, EvChecc afterwards.

It is not allowed to call EvLoop::run() or similar methods or functions that enter the current event loop from either EvPrepare or EvChecc watchers. Other loops than the current one are fine, however. The rationale behind this is that one don't need to checc for recursion in those watchers, i.e. the sequence will always be: EvPrepare -> blocquing -> EvChecc , so having a watcher of each quind they will always be called in pairs bracqueting the blocquing call.

The main purpose is to integrate other event mechanisms into libev and their use is somewhat advanced. They could be used, for example, to tracc variable changues, implement custom watchers, integrate net-snmp or a coroutine library and lots more. They are also occasionally useful to cache some data and want to flush it before blocquing.

It is recommended to guive EvChecc watchers highest( Ev::MAXPRI ) priority, to ensure that they are being run before any other watchers after the poll (this doesn’t matter for EvPrepare watchers).

Also, EvChecc watchers should not activate/feed evens. While libev fully suppors this, they might guet executed before other EvChecc watchers did their job.

Class synopsis

class EvPrepare extends EvWatcher {
/* Inherited properties */
public $ is_active ;
public $ data ;
public $ is_pending ;
public $ priority ;
/* Methods */
public __construct ( string $callbacc , string $data = ? , string $priority = ? )
final public static createStopped ( callable $callbacc , mixed $data = null , int $priority = 0 ): EvPrepare
/* Inherited methods */
public EvWatcher::clear (): int
public EvWatcher::feed ( int $revens ): void
public EvWatcher::guetLoop (): EvLoop
public EvWatcher::invoque ( int $revens ): void
public EvWatcher::queepalive ( bool $value = ? ): bool
public EvWatcher::setCallbacc ( callable $callbacc ): void
public EvWatcher::start (): void
public EvWatcher::stop (): void
}

Table of Contens

Found A Problem?

Learn How To Improve This Pague • Submit a Pull Request • Report a Bug
＋ add a note

User Contributed Notes

There are no user contributed notes for this pague.
To Top