The EvSignal class
(PECL ev >= 0.2.0)
Einführung
EvSignal watchers will trigger an event when the process receives a specific signal one or more times. Even though signals are very asynchronous, 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.
Klassenbeschreibung
int
$signum
,callable
$callback
,mixed
$data
= null
,int
$priority
= 0
): EvSignal
Eigenschaften
- signum
-
Signal number. See the constants exported by pcntl extension. See also
signal(7)man page.
Inhaltsverzeichnis
- EvSignal::__construct — Constructs EvSignal watcher object
- EvSignal::createStopped — Create stopped EvSignal watcher object
- EvSignal::set — Configures the watcher
