Commit | Line | Data |
4536f655 |
1 | package Stem::Event::Signal ; |
2 | |
3 | use Stem::Event::Queue ; |
4 | |
5 | use strict ; |
6 | use warnings ; |
7 | |
8 | use base 'Exporter' ; |
9 | our @EXPORT = qw( process_signal_queue ) ; |
10 | |
11 | # this generic signal event code needs the safe signals of perl 5.8+ |
12 | |
13 | use 5.008 ; |
14 | |
15 | my %signal2event ; |
16 | |
17 | my @signal_queue ; |
18 | my %cached_handlers ; |
19 | |
20 | # this sub will cache the handler closures so we can reuse them. |
21 | |
22 | sub _build { |
23 | |
24 | my( $self ) = @_ ; |
25 | |
26 | my $signal = $self->{'signal'} ; |
27 | |
28 | $self->{'method'} ||= "sig_\L${signal}_handler" ; |
29 | |
30 | # create the signal event handler and cache it. |
31 | # we cache them so we can reuse these closures and never leak |
32 | |
33 | $SIG{ $signal } = $cached_handlers{$signal} ||= |
34 | sub { |
d88e4371 |
35 | <<<<<<< HEAD:lib/Stem/Event/Signal.pm |
4932dd97 |
36 | Stem::Event::Queue::queue_has_event() ; |
37 | |
4536f655 |
38 | #print "HIT $signal\n"; |
d88e4371 |
39 | ======= |
f4d1dc84 |
40 | print "HIT $signal\n"; |
41 | Stem::Event::Queue::mark_not_empty() ; |
d88e4371 |
42 | >>>>>>> master:lib/Stem/Event/Signal.pm |
4536f655 |
43 | push @signal_queue, $signal |
44 | } ; |
45 | |
46 | # track the event object for this signal |
47 | |
48 | $signal2event{$signal} = $self ; |
49 | |
50 | #print "$signal = $SIG{ $signal }\n" ; |
4932dd97 |
51 | |
52 | # make sure the event queue is set up so we can handle signals in the |
53 | # event loop |
54 | |
55 | Stem::Event::Queue::_init_event_queue() ; |
56 | |
4536f655 |
57 | return ; |
58 | } |
59 | |
60 | sub _cancel { |
61 | |
62 | my( $self ) = @_ ; |
63 | |
64 | $SIG{ $self->{'signal'} } = 'DEFAULT' ; |
65 | |
66 | return ; |
67 | } |
68 | |
69 | sub process_signal_queue { |
70 | |
71 | my $sig_count = @signal_queue ; |
72 | |
73 | #print "PROCESS SIGNAL Q $sig_count\n" ; |
74 | |
75 | # return if we have no pending signals |
76 | |
77 | return $sig_count unless $sig_count ; |
78 | |
79 | while( my $signal = shift @signal_queue ) { |
80 | |
81 | my $event = $signal2event{ $signal } ; |
82 | |
83 | next unless $event ; |
84 | next unless $event->{'active'} ; |
85 | |
86 | $event->trigger() ; |
87 | } |
88 | |
89 | return $sig_count ; |
90 | } |
91 | |
92 | 1 ; |