1Mojo::Reactor::Poll(3)User Contributed Perl DocumentationMojo::Reactor::Poll(3)
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NAME

6       Mojo::Reactor::Poll - Low-level event reactor with poll support
7

SYNOPSIS

9         use Mojo::Reactor::Poll;
10
11         # Watch if handle becomes readable or writable
12         my $reactor = Mojo::Reactor::Poll->new;
13         $reactor->io($first => sub ($reactor, $writable) {
14           say $writable ? 'First handle is writable' : 'First handle is readable';
15         });
16
17         # Change to watching only if handle becomes writable
18         $reactor->watch($first, 0, 1);
19
20         # Turn file descriptor into handle and watch if it becomes readable
21         my $second = IO::Handle->new_from_fd($fd, 'r');
22         $reactor->io($second => sub ($reactor, $writable) {
23           say $writable ? 'Second handle is writable' : 'Second handle is readable';
24         })->watch($second, 1, 0);
25
26         # Add a timer
27         $reactor->timer(15 => sub ($reactor) {
28           $reactor->remove($first);
29           $reactor->remove($second);
30           say 'Timeout!';
31         });
32
33         # Start reactor if necessary
34         $reactor->start unless $reactor->is_running;
35

DESCRIPTION

37       Mojo::Reactor::Poll is a low-level event reactor based on IO::Poll.
38

EVENTS

40       Mojo::Reactor::Poll inherits all events from Mojo::Reactor.
41

METHODS

43       Mojo::Reactor::Poll inherits all methods from Mojo::Reactor and
44       implements the following new ones.
45
46   again
47         $reactor->again($id);
48         $reactor->again($id, 0.5);
49
50       Restart timer and optionally change the invocation time. Note that this
51       method requires an active timer.
52
53   io
54         $reactor = $reactor->io($handle => sub {...});
55
56       Watch handle for I/O events, invoking the callback whenever handle
57       becomes readable or writable.
58
59         # Callback will be executed twice if handle becomes readable and writable
60         $reactor->io($handle => sub ($reactor, $writable) {
61           say $writable ? 'Handle is writable' : 'Handle is readable';
62         });
63
64   is_running
65         my $bool = $reactor->is_running;
66
67       Check if reactor is running.
68
69   next_tick
70         my $undef = $reactor->next_tick(sub {...});
71
72       Execute callback as soon as possible, but not before returning or other
73       callbacks that have been registered with this method, always returns
74       "undef".
75
76   one_tick
77         $reactor->one_tick;
78
79       Run reactor until an event occurs or no events are being watched
80       anymore.
81
82         # Don't block longer than 0.5 seconds
83         my $id = $reactor->timer(0.5 => sub {});
84         $reactor->one_tick;
85         $reactor->remove($id);
86
87   recurring
88         my $id = $reactor->recurring(0.25 => sub {...});
89
90       Create a new recurring timer, invoking the callback repeatedly after a
91       given amount of time in seconds.
92
93   remove
94         my $bool = $reactor->remove($handle);
95         my $bool = $reactor->remove($id);
96
97       Remove handle or timer.
98
99   reset
100         $reactor->reset;
101
102       Remove all handles and timers.
103
104   start
105         $reactor->start;
106
107       Start watching for I/O and timer events, this will block until "stop"
108       is called or no events are being watched anymore.
109
110         # Start reactor only if it is not running already
111         $reactor->start unless $reactor->is_running;
112
113   stop
114         $reactor->stop;
115
116       Stop watching for I/O and timer events.
117
118   timer
119         my $id = $reactor->timer(0.5 => sub {...});
120
121       Create a new timer, invoking the callback after a given amount of time
122       in seconds.
123
124   watch
125         $reactor = $reactor->watch($handle, $readable, $writable);
126
127       Change I/O events to watch handle for with true and false values. Note
128       that this method requires an active I/O watcher.
129
130         # Watch only for readable events
131         $reactor->watch($handle, 1, 0);
132
133         # Watch only for writable events
134         $reactor->watch($handle, 0, 1);
135
136         # Watch for readable and writable events
137         $reactor->watch($handle, 1, 1);
138
139         # Pause watching for events
140         $reactor->watch($handle, 0, 0);
141

SEE ALSO

143       Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.
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147perl v5.34.0                      2021-07-22            Mojo::Reactor::Poll(3)
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