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Revision 1.340 by root, Fri Dec 3 18:39:06 2010 UTC vs.
Revision 1.353 by root, Thu Aug 11 20:56:07 2011 UTC

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85that isn't them. What's worse, all the potential users of your 85that isn't them. What's worse, all the potential users of your
86module are I<also> forced to use the same event loop you use. 86module are I<also> forced to use the same event loop you use.
87 87
88AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works 88AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works
89fine. AnyEvent + Tk works fine etc. etc. but none of these work together 89fine. AnyEvent + Tk works fine etc. etc. but none of these work together
90with the rest: POE + IO::Async? No go. Tk + Event? No go. Again: if 90with the rest: POE + EV? No go. Tk + Event? No go. Again: if your module
91your module uses one of those, every user of your module has to use it, 91uses one of those, every user of your module has to use it, too. But if
92too. But if your module uses AnyEvent, it works transparently with all 92your module uses AnyEvent, it works transparently with all event models it
93event models it supports (including stuff like IO::Async, as long as those 93supports (including stuff like IO::Async, as long as those use one of the
94use one of the supported event loops. It is easy to add new event loops 94supported event loops. It is easy to add new event loops to AnyEvent, too,
95to AnyEvent, too, so it is future-proof). 95so it is future-proof).
96 96
97In addition to being free of having to use I<the one and only true event 97In addition to being free of having to use I<the one and only true event
98model>, AnyEvent also is free of bloat and policy: with POE or similar 98model>, AnyEvent also is free of bloat and policy: with POE or similar
99modules, you get an enormous amount of code and strict rules you have to 99modules, you get an enormous amount of code and strict rules you have to
100follow. AnyEvent, on the other hand, is lean and to the point, by only 100follow. AnyEvent, on the other hand, is lean and to the point, by only
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121The interface itself is vaguely similar, but not identical to the L<Event> 121The interface itself is vaguely similar, but not identical to the L<Event>
122module. 122module.
123 123
124During the first call of any watcher-creation method, the module tries 124During the first call of any watcher-creation method, the module tries
125to detect the currently loaded event loop by probing whether one of the 125to detect the currently loaded event loop by probing whether one of the
126following modules is already loaded: L<EV>, L<AnyEvent::Impl::Perl>, 126following modules is already loaded: L<EV>, L<AnyEvent::Loop>,
127L<Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. The first one 127L<Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. The first one
128found is used. If none are detected, the module tries to load the first 128found is used. If none are detected, the module tries to load the first
129four modules in the order given; but note that if L<EV> is not 129four modules in the order given; but note that if L<EV> is not
130available, the pure-perl L<AnyEvent::Impl::Perl> should always work, so 130available, the pure-perl L<AnyEvent::Loop> should always work, so
131the other two are not normally tried. 131the other two are not normally tried.
132 132
133Because AnyEvent first checks for modules that are already loaded, loading 133Because AnyEvent first checks for modules that are already loaded, loading
134an event model explicitly before first using AnyEvent will likely make 134an event model explicitly before first using AnyEvent will likely make
135that model the default. For example: 135that model the default. For example:
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142The I<likely> means that, if any module loads another event model and 142The I<likely> means that, if any module loads another event model and
143starts using it, all bets are off - this case should be very rare though, 143starts using it, all bets are off - this case should be very rare though,
144as very few modules hardcode event loops without announcing this very 144as very few modules hardcode event loops without announcing this very
145loudly. 145loudly.
146 146
147The pure-perl implementation of AnyEvent is called 147The pure-perl implementation of AnyEvent is called C<AnyEvent::Loop>. Like
148C<AnyEvent::Impl::Perl>. Like other event modules you can load it 148other event modules you can load it explicitly and enjoy the high
149explicitly and enjoy the high availability of that event loop :) 149availability of that event loop :)
150 150
151=head1 WATCHERS 151=head1 WATCHERS
152 152
153AnyEvent has the central concept of a I<watcher>, which is an object that 153AnyEvent has the central concept of a I<watcher>, which is an object that
154stores relevant data for each kind of event you are waiting for, such as 154stores relevant data for each kind of event you are waiting for, such as
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356difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into 356difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into
357account. 357account.
358 358
359=item AnyEvent->now_update 359=item AnyEvent->now_update
360 360
361Some event loops (such as L<EV> or L<AnyEvent::Impl::Perl>) cache 361Some event loops (such as L<EV> or L<AnyEvent::Loop>) cache the current
362the current time for each loop iteration (see the discussion of L<< 362time for each loop iteration (see the discussion of L<< AnyEvent->now >>,
363AnyEvent->now >>, above). 363above).
364 364
365When a callback runs for a long time (or when the process sleeps), then 365When a callback runs for a long time (or when the process sleeps), then
366this "current" time will differ substantially from the real time, which 366this "current" time will differ substantially from the real time, which
367might affect timers and time-outs. 367might affect timers and time-outs.
368 368
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482thing in an AnyEvent program, you I<have> to create at least one 482thing in an AnyEvent program, you I<have> to create at least one
483watcher before you C<fork> the child (alternatively, you can call 483watcher before you C<fork> the child (alternatively, you can call
484C<AnyEvent::detect>). 484C<AnyEvent::detect>).
485 485
486As most event loops do not support waiting for child events, they will be 486As most event loops do not support waiting for child events, they will be
487emulated by AnyEvent in most cases, in which the latency and race problems 487emulated by AnyEvent in most cases, in which case the latency and race
488mentioned in the description of signal watchers apply. 488problems mentioned in the description of signal watchers apply.
489 489
490Example: fork a process and wait for it 490Example: fork a process and wait for it
491 491
492 my $done = AnyEvent->condvar; 492 my $done = AnyEvent->condvar;
493 493
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860use. If EV is not installed, then AnyEvent will fall back to its own 860use. If EV is not installed, then AnyEvent will fall back to its own
861pure-perl implementation, which is available everywhere as it comes with 861pure-perl implementation, which is available everywhere as it comes with
862AnyEvent itself. 862AnyEvent itself.
863 863
864 AnyEvent::Impl::EV based on EV (interface to libev, best choice). 864 AnyEvent::Impl::EV based on EV (interface to libev, best choice).
865 AnyEvent::Impl::Perl pure-perl implementation, fast and portable. 865 AnyEvent::Impl::Perl pure-perl AnyEvent::Loop, fast and portable.
866 866
867=item Backends that are transparently being picked up when they are used. 867=item Backends that are transparently being picked up when they are used.
868 868
869These will be used if they are already loaded when the first watcher 869These will be used if they are already loaded when the first watcher
870is created, in which case it is assumed that the application is using 870is created, in which case it is assumed that the application is using
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876 AnyEvent::Impl::Glib based on Glib, slow but very stable. 876 AnyEvent::Impl::Glib based on Glib, slow but very stable.
877 AnyEvent::Impl::Tk based on Tk, very broken. 877 AnyEvent::Impl::Tk based on Tk, very broken.
878 AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. 878 AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
879 AnyEvent::Impl::POE based on POE, very slow, some limitations. 879 AnyEvent::Impl::POE based on POE, very slow, some limitations.
880 AnyEvent::Impl::Irssi used when running within irssi. 880 AnyEvent::Impl::Irssi used when running within irssi.
881 AnyEvent::Impl::IOAsync based on IO::Async.
882 AnyEvent::Impl::Cocoa based on Cocoa::EventLoop.
883 AnyEvent::Impl::FLTK based on FLTK.
881 884
882=item Backends with special needs. 885=item Backends with special needs.
883 886
884Qt requires the Qt::Application to be instantiated first, but will 887Qt requires the Qt::Application to be instantiated first, but will
885otherwise be picked up automatically. As long as the main program 888otherwise be picked up automatically. As long as the main program
886instantiates the application before any AnyEvent watchers are created, 889instantiates the application before any AnyEvent watchers are created,
887everything should just work. 890everything should just work.
888 891
889 AnyEvent::Impl::Qt based on Qt. 892 AnyEvent::Impl::Qt based on Qt.
890
891Support for IO::Async can only be partial, as it is too broken and
892architecturally limited to even support the AnyEvent API. It also
893is the only event loop that needs the loop to be set explicitly, so
894it can only be used by a main program knowing about AnyEvent. See
895L<AnyEvent::Impl::IOAsync> for the gory details.
896
897 AnyEvent::Impl::IOAsync based on IO::Async, cannot be autoprobed.
898 893
899=item Event loops that are indirectly supported via other backends. 894=item Event loops that are indirectly supported via other backends.
900 895
901Some event loops can be supported via other modules: 896Some event loops can be supported via other modules:
902 897
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1010 # AnyEvent not yet initialised, so make sure to load Coro::AnyEvent 1005 # AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
1011 # as soon as it is 1006 # as soon as it is
1012 push @AnyEvent::post_detect, sub { require Coro::AnyEvent }; 1007 push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
1013 } 1008 }
1014 1009
1010=item AnyEvent::postpone BLOCK
1011
1012Arranges for the block to be executed as soon as possible, but not before
1013the call itself returns. In practise, the block will be executed just
1014before the event loop polls for new events, or shortly afterwards.
1015
1016This function never returns anything (to make the C<return postpone { ...
1017}> idiom more useful.
1018
1019To understand the usefulness of this function, consider a function that
1020asynchronously does something for you and returns some transaction
1021object or guard to let you cancel the operation. For example,
1022C<AnyEvent::Socket::tcp_connect>:
1023
1024 # start a conenction attempt unless one is active
1025 $self->{connect_guard} ||= AnyEvent::Socket::tcp_connect "www.example.net", 80, sub {
1026 delete $self->{connect_guard};
1027 ...
1028 };
1029
1030Imagine that this function could instantly call the callback, for
1031example, because it detects an obvious error such as a negative port
1032number. Invoking the callback before the function returns causes problems
1033however: the callback will be called and will try to delete the guard
1034object. But since the function hasn't returned yet, there is nothing to
1035delete. When the function eventually returns it will assign the guard
1036object to C<< $self->{connect_guard} >>, where it will likely never be
1037deleted, so the program thinks it is still trying to connect.
1038
1039This is where C<AnyEvent::postpone> should be used. Instead of calling the
1040callback directly on error:
1041
1042 $cb->(undef), return # signal error to callback, BAD!
1043 if $some_error_condition;
1044
1045It should use C<postpone>:
1046
1047 AnyEvent::postpone { $cb->(undef) }, return # signal error to callback, later
1048 if $some_error_condition;
1049
1015=back 1050=back
1016 1051
1017=head1 WHAT TO DO IN A MODULE 1052=head1 WHAT TO DO IN A MODULE
1018 1053
1019As a module author, you should C<use AnyEvent> and call AnyEvent methods 1054As a module author, you should C<use AnyEvent> and call AnyEvent methods
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1052modules might create watchers when they are loaded, and AnyEvent will 1087modules might create watchers when they are loaded, and AnyEvent will
1053decide on the event model to use as soon as it creates watchers, and it 1088decide on the event model to use as soon as it creates watchers, and it
1054might choose the wrong one unless you load the correct one yourself. 1089might choose the wrong one unless you load the correct one yourself.
1055 1090
1056You can chose to use a pure-perl implementation by loading the 1091You can chose to use a pure-perl implementation by loading the
1057C<AnyEvent::Impl::Perl> module, which gives you similar behaviour 1092C<AnyEvent::Loop> module, which gives you similar behaviour
1058everywhere, but letting AnyEvent chose the model is generally better. 1093everywhere, but letting AnyEvent chose the model is generally better.
1059 1094
1060=head2 MAINLOOP EMULATION 1095=head2 MAINLOOP EMULATION
1061 1096
1062Sometimes (often for short test scripts, or even standalone programs who 1097Sometimes (often for short test scripts, or even standalone programs who
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1157 1192
1158package AnyEvent; 1193package AnyEvent;
1159 1194
1160# basically a tuned-down version of common::sense 1195# basically a tuned-down version of common::sense
1161sub common_sense { 1196sub common_sense {
1162 # from common:.sense 3.3 1197 # from common:.sense 3.4
1163 ${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf3\x0f\xc0\xf0\xfc\x33\x00"; 1198 ${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf0\x0f\xc0\xf0\xfc\x33\x00";
1164 # use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl) 1199 # use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1165 $^H |= 0x00000600; 1200 $^H |= 0x00000600;
1166} 1201}
1167 1202
1168BEGIN { AnyEvent::common_sense } 1203BEGIN { AnyEvent::common_sense }
1169 1204
1170use Carp (); 1205use Carp ();
1171 1206
1172our $VERSION = '5.29'; 1207our $VERSION = '5.34';
1173our $MODEL; 1208our $MODEL;
1174 1209
1175our $AUTOLOAD; 1210our $AUTOLOAD;
1176our @ISA; 1211our @ISA;
1177 1212
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1202 $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; 1237 $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6";
1203} 1238}
1204 1239
1205my @models = ( 1240my @models = (
1206 [EV:: => AnyEvent::Impl::EV:: , 1], 1241 [EV:: => AnyEvent::Impl::EV:: , 1],
1207 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], 1242 [AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1],
1208 # everything below here will not (normally) be autoprobed 1243 # everything below here will not (normally) be autoprobed
1209 # as the pureperl backend should work everywhere 1244 # as the pure perl backend should work everywhere
1210 # and is usually faster 1245 # and is usually faster
1211 [Event:: => AnyEvent::Impl::Event::, 1], 1246 [Event:: => AnyEvent::Impl::Event::, 1],
1212 [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers 1247 [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1213 [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy 1248 [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1214 [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package 1249 [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1215 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles 1250 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1216 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program 1251 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1217 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza 1252 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1218 [Wx:: => AnyEvent::Impl::POE::], 1253 [Wx:: => AnyEvent::Impl::POE::],
1219 [Prima:: => AnyEvent::Impl::POE::], 1254 [Prima:: => AnyEvent::Impl::POE::],
1220 # IO::Async is just too broken - we would need workarounds for its
1221 # byzantine signal and broken child handling, among others.
1222 # IO::Async is rather hard to detect, as it doesn't have any
1223 # obvious default class.
1224 [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1225 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program 1255 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::],
1226 [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program 1256 [Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1227 [AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program 1257 [FLTK:: => AnyEvent::Impl::FLTK::],
1228); 1258);
1229 1259
1230our %method = map +($_ => 1), 1260our %method = map +($_ => 1),
1231 qw(io timer time now now_update signal child idle condvar one_event DESTROY); 1261 qw(io timer time now now_update signal child idle condvar DESTROY);
1232 1262
1233our @post_detect; 1263our @post_detect;
1234 1264
1235sub post_detect(&) { 1265sub post_detect(&) {
1236 my ($cb) = @_; 1266 my ($cb) = @_;
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1336 1366
1337 my $class = shift; 1367 my $class = shift;
1338 $class->$func (@_); 1368 $class->$func (@_);
1339} 1369}
1340 1370
1371our $POSTPONE_W;
1372our @POSTPONE;
1373
1374sub _postpone_exec {
1375 undef $POSTPONE_W;
1376 (pop @POSTPONE)->()
1377 while @POSTPONE;
1378}
1379
1380sub postpone(&) {
1381 push @POSTPONE, shift;
1382
1383 $POSTPONE_W ||= AE::timer (0, 0, \&_postpone_exec);
1384
1385 ()
1386}
1387
1341# utility function to dup a filehandle. this is used by many backends 1388# utility function to dup a filehandle. this is used by many backends
1342# to support binding more than one watcher per filehandle (they usually 1389# to support binding more than one watcher per filehandle (they usually
1343# allow only one watcher per fd, so we dup it to get a different one). 1390# allow only one watcher per fd, so we dup it to get a different one).
1344sub _dupfh($$;$$) { 1391sub _dupfh($$;$$) {
1345 my ($poll, $fh, $r, $w) = @_; 1392 my ($poll, $fh, $r, $w) = @_;
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1433 1480
1434*now = \&time; 1481*now = \&time;
1435 1482
1436sub now_update { } 1483sub now_update { }
1437 1484
1485sub _poll {
1486 Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
1487}
1488
1438# default implementation for ->condvar 1489# default implementation for ->condvar
1490# in fact, the default should not be overwritten
1439 1491
1440sub condvar { 1492sub condvar {
1441 eval q{ # poor man's autoloading {} 1493 eval q{ # poor man's autoloading {}
1442 *condvar = sub { 1494 *condvar = sub {
1443 bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar" 1495 bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
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1628# default implementation for ->child 1680# default implementation for ->child
1629 1681
1630our %PID_CB; 1682our %PID_CB;
1631our $CHLD_W; 1683our $CHLD_W;
1632our $CHLD_DELAY_W; 1684our $CHLD_DELAY_W;
1633our $WNOHANG;
1634 1685
1635# used by many Impl's 1686# used by many Impl's
1636sub _emit_childstatus($$) { 1687sub _emit_childstatus($$) {
1637 my (undef, $rpid, $rstatus) = @_; 1688 my (undef, $rpid, $rstatus) = @_;
1638 1689
… …
1645 eval q{ # poor man's autoloading {} 1696 eval q{ # poor man's autoloading {}
1646 *_sigchld = sub { 1697 *_sigchld = sub {
1647 my $pid; 1698 my $pid;
1648 1699
1649 AnyEvent->_emit_childstatus ($pid, $?) 1700 AnyEvent->_emit_childstatus ($pid, $?)
1650 while ($pid = waitpid -1, $WNOHANG) > 0; 1701 while ($pid = waitpid -1, WNOHANG) > 0;
1651 }; 1702 };
1652 1703
1653 *child = sub { 1704 *child = sub {
1654 my (undef, %arg) = @_; 1705 my (undef, %arg) = @_;
1655 1706
1656 defined (my $pid = $arg{pid} + 0) 1707 my $pid = $arg{pid};
1657 or Carp::croak "required option 'pid' is missing"; 1708 my $cb = $arg{cb};
1658 1709
1659 $PID_CB{$pid}{$arg{cb}} = $arg{cb}; 1710 $PID_CB{$pid}{$cb+0} = $cb;
1660
1661 # WNOHANG is almost cetrainly 1 everywhere
1662 $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/
1663 ? 1
1664 : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1;
1665 1711
1666 unless ($CHLD_W) { 1712 unless ($CHLD_W) {
1667 $CHLD_W = AE::signal CHLD => \&_sigchld; 1713 $CHLD_W = AE::signal CHLD => \&_sigchld;
1668 # child could be a zombie already, so make at least one round 1714 # child could be a zombie already, so make at least one round
1669 &_sigchld; 1715 &_sigchld;
1670 } 1716 }
1671 1717
1672 bless [$pid, $arg{cb}], "AnyEvent::Base::child" 1718 bless [$pid, $cb+0], "AnyEvent::Base::child"
1673 }; 1719 };
1674 1720
1675 *AnyEvent::Base::child::DESTROY = sub { 1721 *AnyEvent::Base::child::DESTROY = sub {
1676 my ($pid, $cb) = @{$_[0]}; 1722 my ($pid, $icb) = @{$_[0]};
1677 1723
1678 delete $PID_CB{$pid}{$cb}; 1724 delete $PID_CB{$pid}{$icb};
1679 delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} }; 1725 delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1680 1726
1681 undef $CHLD_W unless keys %PID_CB; 1727 undef $CHLD_W unless keys %PID_CB;
1682 }; 1728 };
1683 }; 1729 };
… …
1755 1801
1756sub _send { 1802sub _send {
1757 # nop 1803 # nop
1758} 1804}
1759 1805
1806sub _wait {
1807 AnyEvent->_poll until $_[0]{_ae_sent};
1808}
1809
1760sub send { 1810sub send {
1761 my $cv = shift; 1811 my $cv = shift;
1762 $cv->{_ae_sent} = [@_]; 1812 $cv->{_ae_sent} = [@_];
1763 (delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb}; 1813 (delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1764 $cv->_send; 1814 $cv->_send;
… …
1771 1821
1772sub ready { 1822sub ready {
1773 $_[0]{_ae_sent} 1823 $_[0]{_ae_sent}
1774} 1824}
1775 1825
1776sub _wait {
1777 $WAITING
1778 and !$_[0]{_ae_sent}
1779 and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1780
1781 local $WAITING = 1;
1782 AnyEvent->one_event while !$_[0]{_ae_sent};
1783}
1784
1785sub recv { 1826sub recv {
1827 unless ($_[0]{_ae_sent}) {
1828 $WAITING
1829 and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
1830
1831 local $WAITING = 1;
1786 $_[0]->_wait; 1832 $_[0]->_wait;
1833 }
1787 1834
1788 Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; 1835 $_[0]{_ae_croak}
1789 wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] 1836 and Carp::croak $_[0]{_ae_croak};
1837
1838 wantarray
1839 ? @{ $_[0]{_ae_sent} }
1840 : $_[0]{_ae_sent}[0]
1790} 1841}
1791 1842
1792sub cb { 1843sub cb {
1793 my $cv = shift; 1844 my $cv = shift;
1794 1845
… …
1810 &{ $_[0]{_ae_end_cb} || sub { $_[0]->send } }; 1861 &{ $_[0]{_ae_end_cb} || sub { $_[0]->send } };
1811} 1862}
1812 1863
1813# undocumented/compatibility with pre-3.4 1864# undocumented/compatibility with pre-3.4
1814*broadcast = \&send; 1865*broadcast = \&send;
1815*wait = \&_wait; 1866*wait = \&recv;
1816 1867
1817=head1 ERROR AND EXCEPTION HANDLING 1868=head1 ERROR AND EXCEPTION HANDLING
1818 1869
1819In general, AnyEvent does not do any error handling - it relies on the 1870In general, AnyEvent does not do any error handling - it relies on the
1820caller to do that if required. The L<AnyEvent::Strict> module (see also 1871caller to do that if required. The L<AnyEvent::Strict> module (see also
… …
1883used as event model. If it fails to load AnyEvent will proceed with 1934used as event model. If it fails to load AnyEvent will proceed with
1884auto detection and -probing. 1935auto detection and -probing.
1885 1936
1886This functionality might change in future versions. 1937This functionality might change in future versions.
1887 1938
1888For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you 1939For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1889could start your program like this: 1940could start your program like this:
1890 1941
1891 PERL_ANYEVENT_MODEL=Perl perl ... 1942 PERL_ANYEVENT_MODEL=Perl perl ...
1892 1943
1893=item C<PERL_ANYEVENT_PROTOCOLS> 1944=item C<PERL_ANYEVENT_PROTOCOLS>
… …
2592 2643
2593=item L<Time::HiRes> 2644=item L<Time::HiRes>
2594 2645
2595This module is part of perl since release 5.008. It will be used when the 2646This module is part of perl since release 5.008. It will be used when the
2596chosen event library does not come with a timing source of its own. The 2647chosen event library does not come with a timing source of its own. The
2597pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to 2648pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2598try to use a monotonic clock for timing stability. 2649try to use a monotonic clock for timing stability.
2599 2650
2600=back 2651=back
2601 2652
2602 2653
… …
2670 2721
2671FAQ: L<AnyEvent::FAQ>. 2722FAQ: L<AnyEvent::FAQ>.
2672 2723
2673Utility functions: L<AnyEvent::Util>. 2724Utility functions: L<AnyEvent::Util>.
2674 2725
2675Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>, 2726Event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>, L<Glib::EV>,
2676L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. 2727L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.
2677 2728
2678Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, 2729Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2679L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, 2730L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2680L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, 2731L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2681L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>. 2732L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.

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