07-30-2006
Can you give me some more details as to how to integrate?
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****************
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EVCHECK(3) 1 EVCHECK(3)
The EvCheck class
INTRODUCTION
EvPrepare and EvCheck watchers are usually used in pairs. EvPrepare watchers get invoked before the process blocks, EvCheck afterwards.
It is not allowed to call EvLoop::run or similar methods or functions that enter the current event loop from either EvPrepare or EvCheck
watchers. Other loops than the current one are fine, however. The rationale behind this is that one don't need to check for recursion in
those watchers, i.e. the sequence will always be: EvPrepare -> blocking -> EvCheck , so having a watcher of each kind they will always be
called in pairs bracketing the blocking 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
track variable changes, implement custom watchers, integrate net-snmp or a coroutine library and lots more. They are also occasionally use-
ful to cache some data and want to flush it before blocking.
It is recommended to give EvCheck 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, EvCheck watchers should not activate/feed events. While libev fully supports this, they might get executed before other EvCheck
watchers did their job.
CLASS SYNOPSIS
EvCheck
EvCheckextends
EvWatcher
Inherited properties
o public$is_active
o public$data
o public$is_pending
o public$priority
Methods
o public EvCheck::__construct (callable $callback, [mixed $data], [int $priority])
o finalpublicstatic object EvCheck::createStopped (string $callback, [string $data], [string $priority])
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 )
PHP Documentation Group EVCHECK(3)