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Comparing EV/EV.pm (file contents):
Revision 1.10 by root, Mon Oct 29 07:24:37 2007 UTC vs.
Revision 1.15 by root, Wed Oct 31 18:28:00 2007 UTC

… …
2 2
3EV - perl interface to libevent, monkey.org/~provos/libevent/ 3EV - perl interface to libevent, monkey.org/~provos/libevent/
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use EV; 7 use EV;
8 8
9 # TIMER 9 # TIMER
10 10
11 my $w = EV::timer 2, 0, sub { 11 my $w = EV::timer 2, 0, sub {
12 warn "is called after 2s"; 12 warn "is called after 2s";
13 }; 13 };
14 14
15 my $w = EV::timer 2, 1, sub { 15 my $w = EV::timer 2, 1, sub {
16 warn "is called roughly every 2s (repeat = 1)"; 16 warn "is called roughly every 2s (repeat = 1)";
17 }; 17 };
18 18
19 undef $w; # destroy event watcher again 19 undef $w; # destroy event watcher again
20 20
21 # IO
22
23 my $w = EV::timer_abs 0, 60, sub { 21 my $w = EV::timer_abs 0, 60, sub {
24 warn "is called every minute, on the minute, exactly"; 22 warn "is called every minute, on the minute, exactly";
25 }; 23 };
26 24
25 # IO
26
27 my $w = EV::io \*STDIN, EV::READ | EV::PERSIST, sub { 27 my $w = EV::io \*STDIN, EV::READ | EV::PERSIST, sub {
28 my ($w, $events) = @_; # all callbacks get the watcher object and event mask 28 my ($w, $events) = @_; # all callbacks get the watcher object and event mask
29 if ($events & EV::TIMEOUT) { 29 if ($events & EV::TIMEOUT) {
30 warn "nothing received on stdin for 10 seconds, retrying"; 30 warn "nothing received on stdin for 10 seconds, retrying";
31 } else { 31 } else {
32 warn "stdin is readable, you entered: ", <STDIN>; 32 warn "stdin is readable, you entered: ", <STDIN>;
33 } 33 }
34 }; 34 };
35 $w->timeout (10); 35 $w->timeout (10);
36 36
37 my $w = EV::timed_io \*STDIN, EV::READ, 30, sub {
38 my ($w, $events) = @_;
39 if ($_[1] & EV::TIMEOUT) {
40 warn "nothing entered within 30 seconds, bye bye.\n";
41 $w->stop;
42 } else {
43 my $line = <STDIN>;
44 warn "you entered something, you again have 30 seconds.\n";
45 }
46 };
47
48 # SIGNALS
49
50 my $w = EV::signal 'QUIT', sub {
51 warn "sigquit received\n";
52 };
53
54 my $w = EV::signal 3, sub {
55 warn "sigquit received (this is GNU/Linux, right?)\n";
56 };
57
37 # MAINLOOP 58 # MAINLOOP
38 EV::dispatch; # loop as long as watchers are active 59 EV::dispatch; # loop as long as watchers are active
39 EV::loop; # the same thing 60 EV::loop; # the same thing
40 EV::loop EV::LOOP_ONCE; 61 EV::loop EV::LOOP_ONCE; # block until some events could be handles
41 EV::loop EV::LOOP_ONSHOT; 62 EV::loop EV::LOOP_NONBLOCK; # check and handle some events, but do not wait
42 63
43=head1 DESCRIPTION 64=head1 DESCRIPTION
44 65
45This module provides an interface to libevent 66This module provides an interface to libevent
46(L<http://monkey.org/~provos/libevent/>). You probably should acquaint 67(L<http://monkey.org/~provos/libevent/>). You probably should acquaint
… …
55package EV; 76package EV;
56 77
57use strict; 78use strict;
58 79
59BEGIN { 80BEGIN {
60 our $VERSION = '0.02'; 81 our $VERSION = '0.03';
61 use XSLoader; 82 use XSLoader;
62 XSLoader::load "EV", $VERSION; 83 XSLoader::load "EV", $VERSION;
63} 84}
85
86@EV::Io::ISA = "EV::Watcher";
87@EV::Time::ISA = "EV::Watcher";
88@EV::Timer::ISA = "EV::Time";
89@EV::Periodic::ISA = "EV::Time";
90@EV::Signal::ISA = "EV::Watcher";
91@EV::Idle::ISA = "EV::Watcher";
92@EV::Prepare::ISA = "EV::Watcher";
93@EV::Check::ISA = "EV::Watcher";
64 94
65=head1 BASIC INTERFACE 95=head1 BASIC INTERFACE
66 96
67=over 4 97=over 4
68 98
… …
178C<timer_abs> will try to tun the callback at the next possible time where 208C<timer_abs> will try to tun the callback at the next possible time where
179C<$time = $at (mod $interval)>, regardless of any time jumps. 209C<$time = $at (mod $interval)>, regardless of any time jumps.
180 210
181The C<timer_abs_ns> variant doesn't add/start the newly created watcher. 211The C<timer_abs_ns> variant doesn't add/start the newly created watcher.
182 212
183=item my $w = EV::signal $signum, $callback 213=item my $w = EV::signal $signal, $callback
184 214
185=item my $w = EV::signal_ns $signum, $callback 215=item my $w = EV::signal_ns $signal, $callback
186 216
187Call the callback when signal $signum is received. 217Call the callback when $signal is received (the signal can be specified
218by number or by name, just as with kill or %SIG). Signal watchers are
219persistent no natter what.
220
221EV will grab the signal for the process (the kernel only allows one
222component to receive signals) when you start a signal watcher, and
223removes it again when you stop it. Pelr does the same when you add/remove
224callbacks to %SIG, so watch out.
225
226Unfortunately, only one handler can be registered per signal. Screw
227libevent.
188 228
189The C<signal_ns> variant doesn't add/start the newly created watcher. 229The C<signal_ns> variant doesn't add/start the newly created watcher.
190 230
191=back 231=back
192 232
… …
249=item $w->priority_set ($priority) 289=item $w->priority_set ($priority)
250 290
251Set the priority of the watcher to C<$priority> (0 <= $priority < $EV::NPRI). 291Set the priority of the watcher to C<$priority> (0 <= $priority < $EV::NPRI).
252 292
253=back 293=back
294
295=head1 THREADS
296
297Threads are not supported by this in any way. Perl pseudo-threads is evil
298and must die.
254 299
255=head1 BUGS 300=head1 BUGS
256 301
257Lots. Libevent itself isn't well tested and rather buggy, and this module 302Lots. Libevent itself isn't well tested and rather buggy, and this module
258is quite new at the moment. 303is quite new at the moment.
… …
269 314
270our $DIED = sub { 315our $DIED = sub {
271 warn "EV: error in callback (ignoring): $@"; 316 warn "EV: error in callback (ignoring): $@";
272}; 317};
273 318
274our $NPRI = 4; 319init;
275our $BASE = init;
276priority_init $NPRI;
277 320
278push @AnyEvent::REGISTRY, [EV => "EV::AnyEvent"]; 321push @AnyEvent::REGISTRY, [EV => "EV::AnyEvent"];
279 322
2801; 3231;
281 324

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