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Revision 1.96 by root, Thu May 22 02:44:57 2008 UTC vs.
Revision 1.127 by root, Sun Mar 28 15:48:21 2010 UTC

… …
2 2
3EV - perl interface to libev, a high performance full-featured event loop 3EV - perl interface to libev, a high performance full-featured event loop
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use EV; 7 use EV;
8
9 # TIMERS
10
11 my $w = EV::timer 2, 0, sub {
12 warn "is called after 2s";
13 };
14
15 my $w = EV::timer 2, 2, sub {
16 warn "is called roughly every 2s (repeat = 2)";
17 };
18
19 undef $w; # destroy event watcher again
20
21 my $w = EV::periodic 0, 60, 0, sub {
22 warn "is called every minute, on the minute, exactly";
23 };
24
25 # IO
26
27 my $w = EV::io *STDIN, EV::READ, sub {
28 my ($w, $revents) = @_; # all callbacks receive the watcher and event mask
29 warn "stdin is readable, you entered: ", <STDIN>;
30 };
31
32 # SIGNALS
33
34 my $w = EV::signal 'QUIT', sub {
35 warn "sigquit received\n";
36 };
37
38 # CHILD/PID STATUS CHANGES
8 39
9 # TIMERS 40 my $w = EV::child 666, 0, sub {
41 my ($w, $revents) = @_;
42 my $status = $w->rstatus;
43 };
10 44
11 my $w = EV::timer 2, 0, sub {
12 warn "is called after 2s";
13 };
14
15 my $w = EV::timer 2, 2, sub {
16 warn "is called roughly every 2s (repeat = 2)";
17 };
18
19 undef $w; # destroy event watcher again
20
21 my $w = EV::periodic 0, 60, 0, sub {
22 warn "is called every minute, on the minute, exactly";
23 };
24
25 # IO
26
27 my $w = EV::io *STDIN, EV::READ, sub {
28 my ($w, $revents) = @_; # all callbacks receive the watcher and event mask
29 warn "stdin is readable, you entered: ", <STDIN>;
30 };
31
32 # SIGNALS
33
34 my $w = EV::signal 'QUIT', sub {
35 warn "sigquit received\n";
36 };
37
38 # CHILD/PID STATUS CHANGES
39
40 my $w = EV::child 666, 0, sub {
41 my ($w, $revents) = @_;
42 my $status = $w->rstatus;
43 };
44
45 # STAT CHANGES 45 # STAT CHANGES
46 my $w = EV::stat "/etc/passwd", 10, sub { 46 my $w = EV::stat "/etc/passwd", 10, sub {
47 my ($w, $revents) = @_; 47 my ($w, $revents) = @_;
48 warn $w->path, " has changed somehow.\n"; 48 warn $w->path, " has changed somehow.\n";
49 }; 49 };
50 50
51 # MAINLOOP 51 # MAINLOOP
52 EV::loop; # loop until EV::unloop is called or all watchers stop 52 EV::loop; # loop until EV::unloop is called or all watchers stop
53 EV::loop EV::LOOP_ONESHOT; # block until at least one event could be handled 53 EV::loop EV::LOOP_ONESHOT; # block until at least one event could be handled
54 EV::loop EV::LOOP_NONBLOCK; # try to handle same events, but do not block 54 EV::loop EV::LOOP_NONBLOCK; # try to handle same events, but do not block
55
56=head1 BEFORE YOU START USING THIS MODULE
57
58If you only need timer, I/O, signal, child and idle watchers and not the
59advanced functionality of this module, consider using L<AnyEvent> instead,
60specifically the simplified API described in L<AE>.
61
62When used with EV as backend, the L<AE> API is as fast as the native L<EV>
63API, but your programs/modules will still run with many other event loops.
55 64
56=head1 DESCRIPTION 65=head1 DESCRIPTION
57 66
58This module provides an interface to libev 67This module provides an interface to libev
59(L<http://software.schmorp.de/pkg/libev.html>). While the documentation 68(L<http://software.schmorp.de/pkg/libev.html>). While the documentation
60below is comprehensive, one might also consult the documentation of libev 69below is comprehensive, one might also consult the documentation of
61itself (L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod>) for more 70libev itself (L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod> or
62subtle details on watcher semantics or some discussion on the available 71F<perldoc EV::libev>) for more subtle details on watcher semantics or some
63backends, or how to force a specific backend with C<LIBEV_FLAGS>, or just 72discussion on the available backends, or how to force a specific backend
64about in any case because it has much more detailed information. 73with C<LIBEV_FLAGS>, or just about in any case because it has much more
74detailed information.
65 75
66This module is very fast and scalable. It is actually so fast that you 76This module is very fast and scalable. It is actually so fast that you
67can use it through the L<AnyEvent> module, stay portable to other event 77can use it through the L<AnyEvent> module, stay portable to other event
68loops (if you don't rely on any watcher types not available through it) 78loops (if you don't rely on any watcher types not available through it)
69and still be faster than with any other event loop currently supported in 79and still be faster than with any other event loop currently supported in
70Perl. 80Perl.
71 81
82=head2 MODULE EXPORTS
83
84This module does not export any symbols.
85
72=cut 86=cut
73 87
74package EV; 88package EV;
75 89
76use strict; 90use common::sense;
77 91
78BEGIN { 92BEGIN {
79 our $VERSION = '3.41'; 93 our $VERSION = '4.00';
80 use XSLoader; 94 use XSLoader;
81 XSLoader::load "EV", $VERSION; 95 XSLoader::load "EV", $VERSION;
82} 96}
83 97
84@EV::IO::ISA = 98@EV::IO::ISA =
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111default loop as this is fastest (perl-wise), best supported by other 125default loop as this is fastest (perl-wise), best supported by other
112modules (e.g. AnyEvent or Coro) and most portable event loop. 126modules (e.g. AnyEvent or Coro) and most portable event loop.
113 127
114For specific programs you can create additional event loops dynamically. 128For specific programs you can create additional event loops dynamically.
115 129
116=over 4 130If you want to take advantage of kqueue (which often works properly for
131sockets only) even though the default loop doesn't enable it, you can
132I<embed> a kqueue loop into the default loop: running the default loop
133will then also service the kqueue loop to some extent. See the example in
134the section about embed watchers for an example on how to achieve that.
117 135
136=over 4
137
118=item $loop = new EV::loop [$flags] 138=item $loop = new EV::Loop [$flags]
119 139
120Create a new event loop as per the specified flags. Please refer to the 140Create a new event loop as per the specified flags. Please refer to
121C<ev_loop_new ()> function description in the libev documentation 141the C<ev_loop_new ()> function description in the libev documentation
122(L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#GLOBAL_FUNCTIONS>) 142(L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#GLOBAL_FUNCTIONS>,
123for more info. 143or locally-installed as F<EV::libev> manpage) for more info.
124 144
125The loop will automatically be destroyed when it is no longer referenced 145The loop will automatically be destroyed when it is no longer referenced
126by any watcher and the loop object goes out of scope. 146by any watcher and the loop object goes out of scope.
127 147
128Using C<EV::FLAG_FORKCHECK> is recommended, as only the default event loop 148If you are not embedding the loop, then Using C<EV::FLAG_FORKCHECK>
129is protected by this module. 149is recommended, as only the default event loop is protected by this
150module. If you I<are> embedding this loop in the default loop, this is not
151necessary, as C<EV::embed> automatically does the right thing on fork.
130 152
131=item $loop->loop_fork 153=item $loop->loop_fork
132 154
133Must be called after a fork in the child, before entering or continuing 155Must be called after a fork in the child, before entering or continuing
134the event loop. An alternative is to use C<EV::FLAG_FORKCHECK> which calls 156the event loop. An alternative is to use C<EV::FLAG_FORKCHECK> which calls
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136documentation). 158documentation).
137 159
138=item $loop->loop_verify 160=item $loop->loop_verify
139 161
140Calls C<ev_verify> to make internal consistency checks (for debugging 162Calls C<ev_verify> to make internal consistency checks (for debugging
141libev) and abort the program if any data structures wree found to be 163libev) and abort the program if any data structures were found to be
142corrupted. 164corrupted.
143 165
144=item $loop = EV::default_loop [$flags] 166=item $loop = EV::default_loop [$flags]
145 167
146Return the default loop (which is a singleton object). Since this module 168Return the default loop (which is a singleton object). Since this module
147already creates the default loop with default flags, specifying flags here 169already creates the default loop with default flags, specifying flags here
148will not have any effect unless you destroy the default loop. 170will not have any effect unless you destroy the default loop first, which
171isn't supported. So in short: don't do it, and if you break it, you get to
172keep the pieces.
149 173
150=back 174=back
151 175
152 176
153=head1 BASIC INTERFACE 177=head1 BASIC INTERFACE
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183=item $time = EV::now 207=item $time = EV::now
184 208
185=item $time = $loop->now 209=item $time = $loop->now
186 210
187Returns the time the last event loop iteration has been started. This 211Returns the time the last event loop iteration has been started. This
188is the time that (relative) timers are based on, and refering to it is 212is the time that (relative) timers are based on, and referring to it is
189usually faster then calling EV::time. 213usually faster then calling EV::time.
190 214
215=item EV::now_update
216
217=item $loop->now_update
218
219Establishes the current time by querying the kernel, updating the time
220returned by C<EV::now> in the progress. This is a costly operation and
221is usually done automatically within C<EV::loop>.
222
223This function is rarely useful, but when some event callback runs for a
224very long time without entering the event loop, updating libev's idea of
225the current time is a good idea.
226
227=item EV::suspend
228
229=item $loop->suspend
230
231=item EV::resume
232
233=item $loop->resume
234
235These two functions suspend and resume a loop, for use when the loop is
236not used for a while and timeouts should not be processed.
237
238A typical use case would be an interactive program such as a game: When
239the user presses C<^Z> to suspend the game and resumes it an hour later it
240would be best to handle timeouts as if no time had actually passed while
241the program was suspended. This can be achieved by calling C<suspend>
242in your C<SIGTSTP> handler, sending yourself a C<SIGSTOP> and calling
243C<resume> directly afterwards to resume timer processing.
244
245Effectively, all C<timer> watchers will be delayed by the time spend
246between C<suspend> and C<resume>, and all C<periodic> watchers
247will be rescheduled (that is, they will lose any events that would have
248occured while suspended).
249
250After calling C<suspend> you B<must not> call I<any> function on the given
251loop other than C<resume>, and you B<must not> call C<resume>
252without a previous call to C<suspend>.
253
254Calling C<suspend>/C<resume> has the side effect of updating the event
255loop time (see C<now_update>).
256
191=item $backend = EV::backend 257=item $backend = EV::backend
192 258
193=item $backend = $loop->backend 259=item $backend = $loop->backend
194 260
195Returns an integer describing the backend used by libev (EV::METHOD_SELECT 261Returns an integer describing the backend used by libev (EV::BACKEND_SELECT
196or EV::METHOD_EPOLL). 262or EV::BACKEND_EPOLL).
197 263
198=item EV::loop [$flags] 264=item EV::loop [$flags]
199 265
200=item $loop->loop ([$flags]) 266=item $loop->loop ([$flags])
201 267
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221=item $count = EV::loop_count 287=item $count = EV::loop_count
222 288
223=item $count = $loop->loop_count 289=item $count = $loop->loop_count
224 290
225Return the number of times the event loop has polled for new 291Return the number of times the event loop has polled for new
226events. Sometiems useful as a generation counter. 292events. Sometimes useful as a generation counter.
227 293
228=item EV::once $fh_or_undef, $events, $timeout, $cb->($revents) 294=item EV::once $fh_or_undef, $events, $timeout, $cb->($revents)
229 295
230=item $loop->once ($fh_or_undef, $events, $timeout, $cb->($revents)) 296=item $loop->once ($fh_or_undef, $events, $timeout, $cb->($revents))
231 297
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242timeout. Otherwise a EV::timer with this value will be started. 308timeout. Otherwise a EV::timer with this value will be started.
243 309
244When an error occurs or either the timeout or I/O watcher triggers, then 310When an error occurs or either the timeout or I/O watcher triggers, then
245the callback will be called with the received event set (in general 311the callback will be called with the received event set (in general
246you can expect it to be a combination of C<EV::ERROR>, C<EV::READ>, 312you can expect it to be a combination of C<EV::ERROR>, C<EV::READ>,
247C<EV::WRITE> and C<EV::TIMEOUT>). 313C<EV::WRITE> and C<EV::TIMER>).
248 314
249EV::once doesn't return anything: the watchers stay active till either 315EV::once doesn't return anything: the watchers stay active till either
250of them triggers, then they will be stopped and freed, and the callback 316of them triggers, then they will be stopped and freed, and the callback
251invoked. 317invoked.
252 318
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271 337
272=item $loop->set_timeout_collect_interval ($time) 338=item $loop->set_timeout_collect_interval ($time)
273 339
274These advanced functions set the minimum block interval when polling for I/O events and the minimum 340These advanced functions set the minimum block interval when polling for I/O events and the minimum
275wait interval for timer events. See the libev documentation at 341wait interval for timer events. See the libev documentation at
276L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#FUNCTIONS_CONTROLLING_THE_EVENT_LOOP> for 342L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#FUNCTIONS_CONTROLLING_THE_EVENT_LOOP>
277a more detailed discussion. 343(locally installed as F<EV::libev>) for a more detailed discussion.
344
345=item $count = EV::pending_count
346
347=item $count = $loop->pending_count
348
349Returns the number of currently pending watchers.
350
351=item EV::invoke_pending
352
353=item $loop->invoke_pending
354
355Invoke all currently pending watchers.
278 356
279=back 357=back
280 358
281 359
282=head1 WATCHER OBJECTS 360=head1 WATCHER OBJECTS
283 361
284A watcher is an object that gets created to record your interest in some 362A watcher is an object that gets created to record your interest in some
285event. For instance, if you want to wait for STDIN to become readable, you 363event. For instance, if you want to wait for STDIN to become readable, you
286would create an EV::io watcher for that: 364would create an EV::io watcher for that:
287 365
288 my $watcher = EV::io *STDIN, EV::READ, sub { 366 my $watcher = EV::io *STDIN, EV::READ, sub {
289 my ($watcher, $revents) = @_; 367 my ($watcher, $revents) = @_;
290 warn "yeah, STDIN should now be readable without blocking!\n" 368 warn "yeah, STDIN should now be readable without blocking!\n"
291 }; 369 };
292 370
293All watchers can be active (waiting for events) or inactive (paused). Only 371All watchers can be active (waiting for events) or inactive (paused). Only
294active watchers will have their callbacks invoked. All callbacks will be 372active watchers will have their callbacks invoked. All callbacks will be
295called with at least two arguments: the watcher and a bitmask of received 373called with at least two arguments: the watcher and a bitmask of received
296events. 374events.
297 375
298Each watcher type has its associated bit in revents, so you can use the 376Each watcher type has its associated bit in revents, so you can use the
299same callback for multiple watchers. The event mask is named after the 377same callback for multiple watchers. The event mask is named after the
300type, i..e. EV::child sets EV::CHILD, EV::prepare sets EV::PREPARE, 378type, i.e. EV::child sets EV::CHILD, EV::prepare sets EV::PREPARE,
301EV::periodic sets EV::PERIODIC and so on, with the exception of I/O events 379EV::periodic sets EV::PERIODIC and so on, with the exception of I/O events
302(which can set both EV::READ and EV::WRITE bits), and EV::timer (which 380(which can set both EV::READ and EV::WRITE bits).
303uses EV::TIMEOUT).
304 381
305In the rare case where one wants to create a watcher but not start it at 382In the rare case where one wants to create a watcher but not start it at
306the same time, each constructor has a variant with a trailing C<_ns> in 383the same time, each constructor has a variant with a trailing C<_ns> in
307its name, e.g. EV::io has a non-starting variant EV::io_ns and so on. 384its name, e.g. EV::io has a non-starting variant EV::io_ns and so on.
308 385
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387 464
388=item $previous_state = $w->keepalive ($bool) 465=item $previous_state = $w->keepalive ($bool)
389 466
390Normally, C<EV::loop> will return when there are no active watchers 467Normally, C<EV::loop> will return when there are no active watchers
391(which is a "deadlock" because no progress can be made anymore). This is 468(which is a "deadlock" because no progress can be made anymore). This is
392convinient because it allows you to start your watchers (and your jobs), 469convenient because it allows you to start your watchers (and your jobs),
393call C<EV::loop> once and when it returns you know that all your jobs are 470call C<EV::loop> once and when it returns you know that all your jobs are
394finished (or they forgot to register some watchers for their task :). 471finished (or they forgot to register some watchers for their task :).
395 472
396Sometimes, however, this gets in your way, for example when the module 473Sometimes, however, this gets in your way, for example when the module
397that calls C<EV::loop> (usually the main program) is not the same module 474that calls C<EV::loop> (usually the main program) is not the same module
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401because you happen to have this long-running UDP port watcher. 478because you happen to have this long-running UDP port watcher.
402 479
403In this case you can clear the keepalive status, which means that even 480In this case you can clear the keepalive status, which means that even
404though your watcher is active, it won't keep C<EV::loop> from returning. 481though your watcher is active, it won't keep C<EV::loop> from returning.
405 482
406The initial value for keepalive is true (enabled), and you cna change it 483The initial value for keepalive is true (enabled), and you can change it
407any time. 484any time.
408 485
409Example: Register an I/O watcher for some UDP socket but do not keep the 486Example: Register an I/O watcher for some UDP socket but do not keep the
410event loop from running just because of that watcher. 487event loop from running just because of that watcher.
411 488
412 my $udp_socket = ... 489 my $udp_socket = ...
413 my $udp_watcher = EV::io $udp_socket, EV::READ, sub { ... }; 490 my $udp_watcher = EV::io $udp_socket, EV::READ, sub { ... };
414 $1000udp_watcher->keepalive (0); 491 $udp_watcher->keepalive (0);
415 492
416=item $loop = $w->loop 493=item $loop = $w->loop
417 494
418Return the loop that this watcher is attached to. 495Return the loop that this watcher is attached to.
419 496
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629 706
630=item $w = EV::signal $signal, $callback 707=item $w = EV::signal $signal, $callback
631 708
632=item $w = EV::signal_ns $signal, $callback 709=item $w = EV::signal_ns $signal, $callback
633 710
711=item $w = $loop->signal ($signal, $callback)
712
713=item $w = $loop->signal_ns ($signal, $callback)
714
634Call the callback when $signal is received (the signal can be specified by 715Call the callback when $signal is received (the signal can be specified by
635number or by name, just as with C<kill> or C<%SIG>). 716number or by name, just as with C<kill> or C<%SIG>).
717
718Only one event loop can grab a given signal - attempting to grab the same
719signal from two EV loops will crash the program immediately or cause data
720corruption.
636 721
637EV will grab the signal for the process (the kernel only allows one 722EV will grab the signal for the process (the kernel only allows one
638component to receive a signal at a time) when you start a signal watcher, 723component to receive a signal at a time) when you start a signal watcher,
639and removes it again when you stop it. Perl does the same when you 724and removes it again when you stop it. Perl does the same when you
640add/remove callbacks to C<%SIG>, so watch out. 725add/remove callbacks to C<%SIG>, so watch out.
… …
905 # make the dispatcher handle any new stuff 990 # make the dispatcher handle any new stuff
906 ... not shown 991 ... not shown
907 }; 992 };
908 993
909The callbacks of the created watchers will not be called as the watchers 994The callbacks of the created watchers will not be called as the watchers
910are destroyed before this cna happen (remember EV::check gets called 995are destroyed before this can happen (remember EV::check gets called
911first). 996first).
912 997
913The C<check_ns> variant doesn't start (activate) the newly created watcher. 998The C<check_ns> variant doesn't start (activate) the newly created watcher.
914 999
915=back 1000=back
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946loop, other types of watchers might be handled in a delayed or incorrect 1031loop, other types of watchers might be handled in a delayed or incorrect
947fashion and must not be used). 1032fashion and must not be used).
948 1033
949See the libev documentation at 1034See the libev documentation at
950L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#code_ev_embed_code_when_one_backend_> 1035L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#code_ev_embed_code_when_one_backend_>
951for more details. 1036(locally installed as F<EV::libev>) for more details.
952 1037
953In short, this watcher is most useful on BSD systems without working 1038In short, this watcher is most useful on BSD systems without working
954kqueue to still be able to handle a large number of sockets: 1039kqueue to still be able to handle a large number of sockets:
955 1040
956 my $socket_loop; 1041 my $socket_loop;
957 1042
958 # check wether we use SELECT or POLL _and_ KQUEUE is supported 1043 # check wether we use SELECT or POLL _and_ KQUEUE is supported
959 if ( 1044 if (
960 (EV::backend & (EV::BACKEND_POLL | EV::BACKEND_SELECT)) 1045 (EV::backend & (EV::BACKEND_POLL | EV::BACKEND_SELECT))
961 && (EV::supported_backends & EV::embeddable_backends & EV::BACKEND_KQUEUE) 1046 && (EV::supported_backends & EV::embeddable_backends & EV::BACKEND_KQUEUE)
962 ) { 1047 ) {
963 # use kqueue for sockets 1048 # use kqueue for sockets
964 $socket_loop = new EV::Loop EV::BACKEND_KQUEUE | EV::FLAG_NOENV; 1049 $socket_loop = new EV::Loop EV::BACKEND_KQUEUE | EV::FLAG_NOENV;
965 } 1050 }
966 1051
967 # use the default loop otherwise 1052 # use the default loop otherwise
968 $socket_loop ||= EV::default_loop; 1053 $socket_loop ||= EV::default_loop;
969 1054
970=over 4 1055=over 4
971 1056
972=item $w = EV::embed $otherloop, $callback 1057=item $w = EV::embed $otherloop[, $callback]
973 1058
974=item $w = EV::embed_ns $otherloop, $callback 1059=item $w = EV::embed_ns $otherloop[, $callback]
975 1060
976=item $w = $loop->embed ($otherloop, $callback) 1061=item $w = $loop->embed ($otherloop[, $callback])
977 1062
978=item $w = $loop->embed_ns ($otherloop, $callback) 1063=item $w = $loop->embed_ns ($otherloop[, $callback])
979 1064
980Call the callback when the embedded event loop (C<$otherloop>) has any 1065Call the callback when the embedded event loop (C<$otherloop>) has any
981I/O activity. The C<$callback> should alwas be specified as C<undef> in 1066I/O activity. The C<$callback> is optional: if it is missing, then the
982this version of EV, which means the embedded event loop will be managed 1067embedded event loop will be managed automatically (which is recommended),
983automatically. 1068otherwise you have to invoke C<sweep> yourself.
984 1069
985The C<embed_ns> variant doesn't start (activate) the newly created watcher. 1070The C<embed_ns> variant doesn't start (activate) the newly created watcher.
986 1071
987=back 1072=back
988 1073
989=head3 ASYNC WATCHERS - how to wake up another event loop 1074=head3 ASYNC WATCHERS - how to wake up another event loop
990 1075
991Async watchers are provided by EV, but have little use in perl directly, as perl 1076Async watchers are provided by EV, but have little use in perl directly,
992neither supports threads nor direct access to signal handlers or other 1077as perl neither supports threads running in parallel nor direct access to
993contexts where they could be of value. 1078signal handlers or other contexts where they could be of value.
994 1079
995It is, however, possible to use them from the XS level. 1080It is, however, possible to use them from the XS level.
996 1081
997Please see the libev documentation for further details. 1082Please see the libev documentation for further details.
998 1083
… …
1026 my $async_check = EV::check sub { }; 1111 my $async_check = EV::check sub { };
1027 1112
1028This ensures that perl gets into control for a short time to handle any 1113This ensures that perl gets into control for a short time to handle any
1029pending signals, and also ensures (slightly) slower overall operation. 1114pending signals, and also ensures (slightly) slower overall operation.
1030 1115
1031=head1 THREADS 1116=head1 ITHREADS
1032 1117
1033Threads are not supported by this module in any way. Perl pseudo-threads 1118Ithreads are not supported by this module in any way. Perl pseudo-threads
1034is evil stuff and must die. As soon as Perl gains real threads I will work 1119is evil stuff and must die. Real threads as provided by Coro are fully
1035on thread support for it. 1120supported (and enhanced support is available via L<Coro::EV>).
1036 1121
1037=head1 FORK 1122=head1 FORK
1038 1123
1039Most of the "improved" event delivering mechanisms of modern operating 1124Most of the "improved" event delivering mechanisms of modern operating
1040systems have quite a few problems with fork(2) (to put it bluntly: it is 1125systems have quite a few problems with fork(2) (to put it bluntly: it is
… …
1069coroutines with EV), L<Net::SNMP::EV> (asynchronous SNMP), L<AnyEvent> for 1154coroutines with EV), L<Net::SNMP::EV> (asynchronous SNMP), L<AnyEvent> for
1070event-loop agnostic and portable event driven programming. 1155event-loop agnostic and portable event driven programming.
1071 1156
1072=head1 AUTHOR 1157=head1 AUTHOR
1073 1158
1074 Marc Lehmann <schmorp@schmorp.de> 1159 Marc Lehmann <schmorp@schmorp.de>
1075 http://home.schmorp.de/ 1160 http://home.schmorp.de/
1076 1161
1077=cut 1162=cut
1078 1163

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