1 package Stem::Event::Signal ;
3 use Stem::Event::Queue ;
9 our @EXPORT = qw( process_signal_queue ) ;
11 # this generic signal event code needs the safe signals of perl 5.8+
20 # this sub will cache the handler closures so we can reuse them.
26 my $signal = $self->{'signal'} ;
28 $self->{'method'} ||= "sig_\L${signal}_handler" ;
30 # create the signal event handler and cache it.
31 # we cache them so we can reuse these closures and never leak
33 $SIG{ $signal } = $cached_handlers{$signal} ||=
35 Stem::Event::Queue::queue_has_event() ;
36 push @signal_queue, $signal
39 # track the event object for this signal
41 $signal2event{$signal} = $self ;
43 #print "$signal = $SIG{ $signal }\n" ;
45 # make sure the event queue is set up so we can handle signals in the
48 Stem::Event::Queue::_init_event_queue() ;
57 $SIG{ $self->{'signal'} } = 'DEFAULT' ;
62 sub process_signal_queue {
64 my $sig_count = @signal_queue ;
66 #print "PROCESS SIGNAL Q $sig_count\n" ;
68 # return if we have no pending signals
70 return $sig_count unless $sig_count ;
72 while( my $signal = shift @signal_queue ) {
74 my $event = $signal2event{ $signal } ;
77 next unless $event->{'active'} ;