IO::Async::Signal(3) User Contributed Perl Documentation IO::Async::Signal(3)NAME
"IO::Async::Signal" - event callback on receipt of a POSIX signal
SYNOPSIS
use IO::Async::Signal;
use IO::Async::Loop;
my $loop = IO::Async::Loop->new();
my $signal = IO::Async::Signal->new(
name => "HUP",
on_receipt => sub {
print "I caught SIGHUP\n";
},
);
$loop->add( $signal );
$loop->loop_forever;
DESCRIPTION
This module provides a class of "IO::Async::Notifier" which invokes its
callback when a particular POSIX signal is received.
Multiple objects can be added to a "Loop" that all watch for the same
signal. The callback functions will all be invoked, in no particular
order.
This object may be used in one of two ways; with a callback function,
or as a base class.
Callbacks
If the "on_receipt" key is supplied to the constructor, it should
contain a CODE reference to a callback function to be invoked when
the signal is received.
$on_receipt->( $self )
Base Class
If a subclass is built, then it can override the "on_receipt"
method.
$self->on_receipt()PARAMETERS
The following named parameters may be passed to "new" or "configure":
name => STRING
The name of the signal to watch. This should be a bare name
like "TERM". Can only be given at construction time.
on_receipt => CODE
CODE reference to callback to invoke when the signal is
received. If not supplied, the subclass method will be called
instead.
Once constructed, the "Signal" will need to be added to the "Loop"
before it will work.
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2010-06-09 IO::Async::Signal(3)
