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)
