ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/AnyEvent/lib/AnyEvent.pm
(Generate patch)

Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.333 by root, Tue Oct 12 06:47:54 2010 UTC vs.
Revision 1.354 by root, Thu Aug 11 21:26:39 2011 UTC

… …
46in a tutorial or some gentle introduction, have a look at the 46in a tutorial or some gentle introduction, have a look at the
47L<AnyEvent::Intro> manpage. 47L<AnyEvent::Intro> manpage.
48 48
49=head1 SUPPORT 49=head1 SUPPORT
50 50
51An FAQ document is available as L<AnyEvent::FAQ>.
52
51There is a mailinglist for discussing all things AnyEvent, and an IRC 53There also is a mailinglist for discussing all things AnyEvent, and an IRC
52channel, too. 54channel, too.
53 55
54See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software 56See the AnyEvent project page at the B<Schmorpforge Ta-Sa Software
55Repository>, at L<http://anyevent.schmorp.de>, for more info. 57Repository>, at L<http://anyevent.schmorp.de>, for more info.
56 58
… …
83that 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
84module 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.
85 87
86AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works 88AnyEvent is different: AnyEvent + POE works fine. AnyEvent + Glib works
87fine. 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
88with 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
89your 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
90too. But if your module uses AnyEvent, it works transparently with all 92your module uses AnyEvent, it works transparently with all event models it
91event 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
92use 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,
93to AnyEvent, too, so it is future-proof). 95so it is future-proof).
94 96
95In 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
96model>, 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
97modules, 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
98follow. 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
… …
119The 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>
120module. 122module.
121 123
122During the first call of any watcher-creation method, the module tries 124During the first call of any watcher-creation method, the module tries
123to 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
124following modules is already loaded: L<EV>, L<AnyEvent::Impl::Perl>, 126following modules is already loaded: L<EV>, L<AnyEvent::Loop>,
125L<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
126found 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
127four 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
128available, the pure-perl L<AnyEvent::Impl::Perl> should always work, so 130available, the pure-perl L<AnyEvent::Loop> should always work, so
129the other two are not normally tried. 131the other two are not normally tried.
130 132
131Because AnyEvent first checks for modules that are already loaded, loading 133Because AnyEvent first checks for modules that are already loaded, loading
132an event model explicitly before first using AnyEvent will likely make 134an event model explicitly before first using AnyEvent will likely make
133that model the default. For example: 135that model the default. For example:
… …
140The 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
141starts 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,
142as very few modules hardcode event loops without announcing this very 144as very few modules hardcode event loops without announcing this very
143loudly. 145loudly.
144 146
145The pure-perl implementation of AnyEvent is called 147The pure-perl implementation of AnyEvent is called C<AnyEvent::Loop>. Like
146C<AnyEvent::Impl::Perl>. Like other event modules you can load it 148other event modules you can load it explicitly and enjoy the high
147explicitly and enjoy the high availability of that event loop :) 149availability of that event loop :)
148 150
149=head1 WATCHERS 151=head1 WATCHERS
150 152
151AnyEvent 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
152stores 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
… …
354difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into 356difference between C<< AnyEvent->time >> and C<< AnyEvent->now >> into
355account. 357account.
356 358
357=item AnyEvent->now_update 359=item AnyEvent->now_update
358 360
359Some 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
360the current time for each loop iteration (see the discussion of L<< 362time for each loop iteration (see the discussion of L<< AnyEvent->now >>,
361AnyEvent->now >>, above). 363above).
362 364
363When 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
364this "current" time will differ substantially from the real time, which 366this "current" time will differ substantially from the real time, which
365might affect timers and time-outs. 367might affect timers and time-outs.
366 368
… …
480thing 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
481watcher before you C<fork> the child (alternatively, you can call 483watcher before you C<fork> the child (alternatively, you can call
482C<AnyEvent::detect>). 484C<AnyEvent::detect>).
483 485
484As 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
485emulated 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
486mentioned in the description of signal watchers apply. 488problems mentioned in the description of signal watchers apply.
487 489
488Example: fork a process and wait for it 490Example: fork a process and wait for it
489 491
490 my $done = AnyEvent->condvar; 492 my $done = AnyEvent->condvar;
491 493
… …
858use. 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
859pure-perl implementation, which is available everywhere as it comes with 861pure-perl implementation, which is available everywhere as it comes with
860AnyEvent itself. 862AnyEvent itself.
861 863
862 AnyEvent::Impl::EV based on EV (interface to libev, best choice). 864 AnyEvent::Impl::EV based on EV (interface to libev, best choice).
863 AnyEvent::Impl::Perl pure-perl implementation, fast and portable. 865 AnyEvent::Impl::Perl pure-perl AnyEvent::Loop, fast and portable.
864 866
865=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.
866 868
867These 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
868is 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
… …
874 AnyEvent::Impl::Glib based on Glib, slow but very stable. 876 AnyEvent::Impl::Glib based on Glib, slow but very stable.
875 AnyEvent::Impl::Tk based on Tk, very broken. 877 AnyEvent::Impl::Tk based on Tk, very broken.
876 AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. 878 AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse.
877 AnyEvent::Impl::POE based on POE, very slow, some limitations. 879 AnyEvent::Impl::POE based on POE, very slow, some limitations.
878 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.
879 884
880=item Backends with special needs. 885=item Backends with special needs.
881 886
882Qt requires the Qt::Application to be instantiated first, but will 887Qt requires the Qt::Application to be instantiated first, but will
883otherwise be picked up automatically. As long as the main program 888otherwise be picked up automatically. As long as the main program
884instantiates the application before any AnyEvent watchers are created, 889instantiates the application before any AnyEvent watchers are created,
885everything should just work. 890everything should just work.
886 891
887 AnyEvent::Impl::Qt based on Qt. 892 AnyEvent::Impl::Qt based on Qt.
888
889Support for IO::Async can only be partial, as it is too broken and
890architecturally limited to even support the AnyEvent API. It also
891is the only event loop that needs the loop to be set explicitly, so
892it can only be used by a main program knowing about AnyEvent. See
893L<AnyEvent::Impl::IOAsync> for the gory details.
894
895 AnyEvent::Impl::IOAsync based on IO::Async, cannot be autoprobed.
896 893
897=item Event loops that are indirectly supported via other backends. 894=item Event loops that are indirectly supported via other backends.
898 895
899Some event loops can be supported via other modules: 896Some event loops can be supported via other modules:
900 897
… …
1008 # AnyEvent not yet initialised, so make sure to load Coro::AnyEvent 1005 # AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
1009 # as soon as it is 1006 # as soon as it is
1010 push @AnyEvent::post_detect, sub { require Coro::AnyEvent }; 1007 push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
1011 } 1008 }
1012 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
1013=back 1050=back
1014 1051
1015=head1 WHAT TO DO IN A MODULE 1052=head1 WHAT TO DO IN A MODULE
1016 1053
1017As 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
… …
1050modules might create watchers when they are loaded, and AnyEvent will 1087modules might create watchers when they are loaded, and AnyEvent will
1051decide 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
1052might choose the wrong one unless you load the correct one yourself. 1089might choose the wrong one unless you load the correct one yourself.
1053 1090
1054You can chose to use a pure-perl implementation by loading the 1091You can chose to use a pure-perl implementation by loading the
1055C<AnyEvent::Impl::Perl> module, which gives you similar behaviour 1092C<AnyEvent::Loop> module, which gives you similar behaviour
1056everywhere, but letting AnyEvent chose the model is generally better. 1093everywhere, but letting AnyEvent chose the model is generally better.
1057 1094
1058=head2 MAINLOOP EMULATION 1095=head2 MAINLOOP EMULATION
1059 1096
1060Sometimes (often for short test scripts, or even standalone programs who 1097Sometimes (often for short test scripts, or even standalone programs who
… …
1155 1192
1156package AnyEvent; 1193package AnyEvent;
1157 1194
1158# basically a tuned-down version of common::sense 1195# basically a tuned-down version of common::sense
1159sub common_sense { 1196sub common_sense {
1160 # from common:.sense 3.3 1197 # from common:.sense 3.4
1161 ${^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";
1162 # 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)
1163 $^H |= 0x00000600; 1200 $^H |= 0x00000600;
1164} 1201}
1165 1202
1166BEGIN { AnyEvent::common_sense } 1203BEGIN { AnyEvent::common_sense }
1167 1204
1168use Carp (); 1205use Carp ();
1169 1206
1170our $VERSION = '5.271'; 1207our $VERSION = '5.34';
1171our $MODEL; 1208our $MODEL;
1172 1209
1173our $AUTOLOAD; 1210our $AUTOLOAD;
1174our @ISA; 1211our @ISA;
1175 1212
… …
1200 $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; 1237 $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6";
1201} 1238}
1202 1239
1203my @models = ( 1240my @models = (
1204 [EV:: => AnyEvent::Impl::EV:: , 1], 1241 [EV:: => AnyEvent::Impl::EV:: , 1],
1205 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], 1242 [AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1],
1206 # everything below here will not (normally) be autoprobed 1243 # everything below here will not (normally) be autoprobed
1207 # as the pureperl backend should work everywhere 1244 # as the pure perl backend should work everywhere
1208 # and is usually faster 1245 # and is usually faster
1209 [Event:: => AnyEvent::Impl::Event::, 1], 1246 [Event:: => AnyEvent::Impl::Event::, 1],
1210 [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers 1247 [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1211 [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy 1248 [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1212 [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package 1249 [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1213 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles 1250 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1214 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program 1251 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1215 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza 1252 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1216 [Wx:: => AnyEvent::Impl::POE::], 1253 [Wx:: => AnyEvent::Impl::POE::],
1217 [Prima:: => AnyEvent::Impl::POE::], 1254 [Prima:: => AnyEvent::Impl::POE::],
1218 # IO::Async is just too broken - we would need workarounds for its
1219 # byzantine signal and broken child handling, among others.
1220 # IO::Async is rather hard to detect, as it doesn't have any
1221 # obvious default class.
1222 [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1223 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program 1255 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::],
1224 [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program 1256 [Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1225 [AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program 1257 [FLTK:: => AnyEvent::Impl::FLTK::],
1226); 1258);
1227 1259
1228our %method = map +($_ => 1), 1260our %method = map +($_ => 1),
1229 qw(io timer time now now_update signal child idle condvar one_event DESTROY); 1261 qw(io timer time now now_update signal child idle condvar DESTROY);
1230 1262
1231our @post_detect; 1263our @post_detect;
1232 1264
1233sub post_detect(&) { 1265sub post_detect(&) {
1234 my ($cb) = @_; 1266 my ($cb) = @_;
… …
1289 last; 1321 last;
1290 } 1322 }
1291 } 1323 }
1292 1324
1293 $MODEL 1325 $MODEL
1294 or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n"; 1326 or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n";
1295 } 1327 }
1296 } 1328 }
1297 1329
1298 @models = (); # free probe data 1330 @models = (); # free probe data
1299 1331
1300 push @{"$MODEL\::ISA"}, "AnyEvent::Base"; 1332 push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1301 unshift @ISA, $MODEL; 1333 unshift @ISA, $MODEL;
1302 1334
1303 # now nuke some methods that are overriden by the backend. 1335 # now nuke some methods that are overridden by the backend.
1304 # SUPER is not allowed. 1336 # SUPER is not allowed.
1305 for (qw(time signal child idle)) { 1337 for (qw(time signal child idle)) {
1306 undef &{"AnyEvent::Base::$_"} 1338 undef &{"AnyEvent::Base::$_"}
1307 if defined &{"$MODEL\::$_"}; 1339 if defined &{"$MODEL\::$_"};
1308 } 1340 }
1309 1341
1310 require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT}; 1342 if ($ENV{PERL_ANYEVENT_STRICT}) {
1343 eval { require AnyEvent::Strict };
1344 warn "AnyEvent: cannot load AnyEvent::Strict: $@"
1345 if $@ && $VERBOSE;
1346 }
1311 1347
1312 (shift @post_detect)->() while @post_detect; 1348 (shift @post_detect)->() while @post_detect;
1313 1349
1314 *post_detect = sub(&) { 1350 *post_detect = sub(&) {
1315 shift->(); 1351 shift->();
… …
1328 1364
1329 detect; 1365 detect;
1330 1366
1331 my $class = shift; 1367 my $class = shift;
1332 $class->$func (@_); 1368 $class->$func (@_);
1369}
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 $POSTPONE_W ||= AE::timer (0, 0, \&_postpone_exec);
1384
1385 ()
1333} 1386}
1334 1387
1335# utility function to dup a filehandle. this is used by many backends 1388# utility function to dup a filehandle. this is used by many backends
1336# to support binding more than one watcher per filehandle (they usually 1389# to support binding more than one watcher per filehandle (they usually
1337# allow only one watcher per fd, so we dup it to get a different one). 1390# allow only one watcher per fd, so we dup it to get a different one).
… …
1399} 1452}
1400 1453
1401sub time() { 1454sub time() {
1402 AnyEvent->time 1455 AnyEvent->time
1403} 1456}
1457
1458*postpone = \&AnyEvent::postpone;
1404 1459
1405package AnyEvent::Base; 1460package AnyEvent::Base;
1406 1461
1407# default implementations for many methods 1462# default implementations for many methods
1408 1463
… …
1427 1482
1428*now = \&time; 1483*now = \&time;
1429 1484
1430sub now_update { } 1485sub now_update { }
1431 1486
1487sub _poll {
1488 Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
1489}
1490
1432# default implementation for ->condvar 1491# default implementation for ->condvar
1492# in fact, the default should not be overwritten
1433 1493
1434sub condvar { 1494sub condvar {
1435 eval q{ # poor man's autoloading {} 1495 eval q{ # poor man's autoloading {}
1436 *condvar = sub { 1496 *condvar = sub {
1437 bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar" 1497 bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
… …
1622# default implementation for ->child 1682# default implementation for ->child
1623 1683
1624our %PID_CB; 1684our %PID_CB;
1625our $CHLD_W; 1685our $CHLD_W;
1626our $CHLD_DELAY_W; 1686our $CHLD_DELAY_W;
1627our $WNOHANG;
1628 1687
1629# used by many Impl's 1688# used by many Impl's
1630sub _emit_childstatus($$) { 1689sub _emit_childstatus($$) {
1631 my (undef, $rpid, $rstatus) = @_; 1690 my (undef, $rpid, $rstatus) = @_;
1632 1691
… …
1639 eval q{ # poor man's autoloading {} 1698 eval q{ # poor man's autoloading {}
1640 *_sigchld = sub { 1699 *_sigchld = sub {
1641 my $pid; 1700 my $pid;
1642 1701
1643 AnyEvent->_emit_childstatus ($pid, $?) 1702 AnyEvent->_emit_childstatus ($pid, $?)
1644 while ($pid = waitpid -1, $WNOHANG) > 0; 1703 while ($pid = waitpid -1, WNOHANG) > 0;
1645 }; 1704 };
1646 1705
1647 *child = sub { 1706 *child = sub {
1648 my (undef, %arg) = @_; 1707 my (undef, %arg) = @_;
1649 1708
1650 defined (my $pid = $arg{pid} + 0) 1709 my $pid = $arg{pid};
1651 or Carp::croak "required option 'pid' is missing"; 1710 my $cb = $arg{cb};
1652 1711
1653 $PID_CB{$pid}{$arg{cb}} = $arg{cb}; 1712 $PID_CB{$pid}{$cb+0} = $cb;
1654
1655 # WNOHANG is almost cetrainly 1 everywhere
1656 $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/
1657 ? 1
1658 : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1;
1659 1713
1660 unless ($CHLD_W) { 1714 unless ($CHLD_W) {
1661 $CHLD_W = AE::signal CHLD => \&_sigchld; 1715 $CHLD_W = AE::signal CHLD => \&_sigchld;
1662 # child could be a zombie already, so make at least one round 1716 # child could be a zombie already, so make at least one round
1663 &_sigchld; 1717 &_sigchld;
1664 } 1718 }
1665 1719
1666 bless [$pid, $arg{cb}], "AnyEvent::Base::child" 1720 bless [$pid, $cb+0], "AnyEvent::Base::child"
1667 }; 1721 };
1668 1722
1669 *AnyEvent::Base::child::DESTROY = sub { 1723 *AnyEvent::Base::child::DESTROY = sub {
1670 my ($pid, $cb) = @{$_[0]}; 1724 my ($pid, $icb) = @{$_[0]};
1671 1725
1672 delete $PID_CB{$pid}{$cb}; 1726 delete $PID_CB{$pid}{$icb};
1673 delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} }; 1727 delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1674 1728
1675 undef $CHLD_W unless keys %PID_CB; 1729 undef $CHLD_W unless keys %PID_CB;
1676 }; 1730 };
1677 }; 1731 };
… …
1749 1803
1750sub _send { 1804sub _send {
1751 # nop 1805 # nop
1752} 1806}
1753 1807
1808sub _wait {
1809 AnyEvent->_poll until $_[0]{_ae_sent};
1810}
1811
1754sub send { 1812sub send {
1755 my $cv = shift; 1813 my $cv = shift;
1756 $cv->{_ae_sent} = [@_]; 1814 $cv->{_ae_sent} = [@_];
1757 (delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb}; 1815 (delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1758 $cv->_send; 1816 $cv->_send;
… …
1765 1823
1766sub ready { 1824sub ready {
1767 $_[0]{_ae_sent} 1825 $_[0]{_ae_sent}
1768} 1826}
1769 1827
1770sub _wait {
1771 $WAITING
1772 and !$_[0]{_ae_sent}
1773 and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1774
1775 local $WAITING = 1;
1776 AnyEvent->one_event while !$_[0]{_ae_sent};
1777}
1778
1779sub recv { 1828sub recv {
1829 unless ($_[0]{_ae_sent}) {
1830 $WAITING
1831 and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
1832
1833 local $WAITING = 1;
1780 $_[0]->_wait; 1834 $_[0]->_wait;
1835 }
1781 1836
1782 Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; 1837 $_[0]{_ae_croak}
1783 wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] 1838 and Carp::croak $_[0]{_ae_croak};
1839
1840 wantarray
1841 ? @{ $_[0]{_ae_sent} }
1842 : $_[0]{_ae_sent}[0]
1784} 1843}
1785 1844
1786sub cb { 1845sub cb {
1787 my $cv = shift; 1846 my $cv = shift;
1788 1847
… …
1804 &{ $_[0]{_ae_end_cb} || sub { $_[0]->send } }; 1863 &{ $_[0]{_ae_end_cb} || sub { $_[0]->send } };
1805} 1864}
1806 1865
1807# undocumented/compatibility with pre-3.4 1866# undocumented/compatibility with pre-3.4
1808*broadcast = \&send; 1867*broadcast = \&send;
1809*wait = \&_wait; 1868*wait = \&recv;
1810 1869
1811=head1 ERROR AND EXCEPTION HANDLING 1870=head1 ERROR AND EXCEPTION HANDLING
1812 1871
1813In general, AnyEvent does not do any error handling - it relies on the 1872In general, AnyEvent does not do any error handling - it relies on the
1814caller to do that if required. The L<AnyEvent::Strict> module (see also 1873caller to do that if required. The L<AnyEvent::Strict> module (see also
… …
1877used as event model. If it fails to load AnyEvent will proceed with 1936used as event model. If it fails to load AnyEvent will proceed with
1878auto detection and -probing. 1937auto detection and -probing.
1879 1938
1880This functionality might change in future versions. 1939This functionality might change in future versions.
1881 1940
1882For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you 1941For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1883could start your program like this: 1942could start your program like this:
1884 1943
1885 PERL_ANYEVENT_MODEL=Perl perl ... 1944 PERL_ANYEVENT_MODEL=Perl perl ...
1886 1945
1887=item C<PERL_ANYEVENT_PROTOCOLS> 1946=item C<PERL_ANYEVENT_PROTOCOLS>
… …
2586 2645
2587=item L<Time::HiRes> 2646=item L<Time::HiRes>
2588 2647
2589This module is part of perl since release 5.008. It will be used when the 2648This module is part of perl since release 5.008. It will be used when the
2590chosen event library does not come with a timing source of its own. The 2649chosen event library does not come with a timing source of its own. The
2591pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to 2650pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2592try to use a monotonic clock for timing stability. 2651try to use a monotonic clock for timing stability.
2593 2652
2594=back 2653=back
2595 2654
2596 2655
… …
2658pronounced). 2717pronounced).
2659 2718
2660 2719
2661=head1 SEE ALSO 2720=head1 SEE ALSO
2662 2721
2722Tutorial/Introduction: L<AnyEvent::Intro>.
2723
2724FAQ: L<AnyEvent::FAQ>.
2725
2663Utility functions: L<AnyEvent::Util>. 2726Utility functions: L<AnyEvent::Util>.
2664 2727
2665Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>, 2728Event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>, L<Glib::EV>,
2666L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. 2729L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.
2667 2730
2668Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, 2731Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2669L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, 2732L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2670L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, 2733L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2671L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>. 2734L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.
… …
2673Non-blocking file handles, sockets, TCP clients and 2736Non-blocking file handles, sockets, TCP clients and
2674servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. 2737servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
2675 2738
2676Asynchronous DNS: L<AnyEvent::DNS>. 2739Asynchronous DNS: L<AnyEvent::DNS>.
2677 2740
2678Coroutine support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, 2741Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.
2679L<Coro::Event>,
2680 2742
2681Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::XMPP>, 2743Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::IRC>,
2682L<AnyEvent::HTTP>. 2744L<AnyEvent::HTTP>.
2683 2745
2684 2746
2685=head1 AUTHOR 2747=head1 AUTHOR
2686 2748

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines