Php/docs/class.evsignal
(PECL ev >= 0.2.0)
Introduction
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.
Class synopsis
EvSignal extends EvWatcher {
public
$signum
/* Inherited properties */
public
$is_active
public
$data
public
$is_pending
public
$priority
/* Methods */
public
__construct
(
int
$signum
,
callable
$callback
[,
mixed
$data
= NULL
[,
int
$priority
= 0
]] )
final
public
static
createStopped
(
int
$signum
,
callable
$callback
[,
mixed
$data
= NULL
[,
int
$priority
= 0
]] ) : EvSignal
public
set
(
int
$signum
) : void
/* Inherited methods */
public EvWatcher::clear ( ) : int
abstract public EvWatcher::__construct ( )
public
EvWatcher::feed
(
int
$revents
) : void
public EvWatcher::getLoop ( ) : EvLoop
public
EvWatcher::invoke
(
int
$revents
) : void
public
EvWatcher::keepalive
([
bool
$value
] ) : bool
public
EvWatcher::setCallback
(
callable
$callback
) : void
public EvWatcher::start ( ) : void
public EvWatcher::stop ( ) : void
}
Properties
signum- Signal number. See the constants exported by pcntl extension. See also
signal(7)man page.
Table of Contents
- EvSignal::__construct — Constructs EvSignal watcher object
- EvSignal::createStopped — Create stopped EvSignal watcher object
- EvSignal::set — Configures the watcher
/* Properties */