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 1.349 by root, Mon Jul 4 21:14:42 2011 UTC vs.
Revision 1.355 by root, Fri Aug 12 00:53:29 2011 UTC

… …
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:
… …
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
… …
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
… …
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
… …
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
… …
1005 # AnyEvent not yet initialised, so make sure to load Coro::AnyEvent 1005 # AnyEvent not yet initialised, so make sure to load Coro::AnyEvent
1006 # as soon as it is 1006 # as soon as it is
1007 push @AnyEvent::post_detect, sub { require Coro::AnyEvent }; 1007 push @AnyEvent::post_detect, sub { require Coro::AnyEvent };
1008 } 1008 }
1009 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
1010=back 1050=back
1011 1051
1012=head1 WHAT TO DO IN A MODULE 1052=head1 WHAT TO DO IN A MODULE
1013 1053
1014As 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
… …
1047modules might create watchers when they are loaded, and AnyEvent will 1087modules might create watchers when they are loaded, and AnyEvent will
1048decide 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
1049might choose the wrong one unless you load the correct one yourself. 1089might choose the wrong one unless you load the correct one yourself.
1050 1090
1051You can chose to use a pure-perl implementation by loading the 1091You can chose to use a pure-perl implementation by loading the
1052C<AnyEvent::Impl::Perl> module, which gives you similar behaviour 1092C<AnyEvent::Loop> module, which gives you similar behaviour
1053everywhere, but letting AnyEvent chose the model is generally better. 1093everywhere, but letting AnyEvent chose the model is generally better.
1054 1094
1055=head2 MAINLOOP EMULATION 1095=head2 MAINLOOP EMULATION
1056 1096
1057Sometimes (often for short test scripts, or even standalone programs who 1097Sometimes (often for short test scripts, or even standalone programs who
… …
1195 $PROTOCOL{$_} = ++$idx 1235 $PROTOCOL{$_} = ++$idx
1196 for reverse split /\s*,\s*/, 1236 for reverse split /\s*,\s*/,
1197 $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; 1237 $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6";
1198} 1238}
1199 1239
1240our @post_detect;
1241
1242sub post_detect(&) {
1243 my ($cb) = @_;
1244
1245 push @post_detect, $cb;
1246
1247 defined wantarray
1248 ? bless \$cb, "AnyEvent::Util::postdetect"
1249 : ()
1250}
1251
1252sub AnyEvent::Util::postdetect::DESTROY {
1253 @post_detect = grep $_ != ${$_[0]}, @post_detect;
1254}
1255
1256our $POSTPONE_W;
1257our @POSTPONE;
1258
1259sub _postpone_exec {
1260 undef $POSTPONE_W;
1261
1262 &{ shift @POSTPONE }
1263 while @POSTPONE;
1264}
1265
1266sub postpone(&) {
1267 push @POSTPONE, shift;
1268
1269 $POSTPONE_W ||= AE::timer (0, 0, \&_postpone_exec);
1270
1271 ()
1272}
1273
1200my @models = ( 1274our @models = (
1201 [EV:: => AnyEvent::Impl::EV:: , 1], 1275 [EV:: => AnyEvent::Impl::EV:: , 1],
1202 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], 1276 [AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1],
1203 # everything below here will not (normally) be autoprobed 1277 # everything below here will not (normally) be autoprobed
1204 # as the pureperl backend should work everywhere 1278 # as the pure perl backend should work everywhere
1205 # and is usually faster 1279 # and is usually faster
1206 [Event:: => AnyEvent::Impl::Event::, 1], 1280 [Event:: => AnyEvent::Impl::Event::, 1],
1207 [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers 1281 [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1208 [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy 1282 [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1209 [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package 1283 [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1210 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles 1284 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1211 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program 1285 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1212 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza 1286 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1213 [Wx:: => AnyEvent::Impl::POE::], 1287 [Wx:: => AnyEvent::Impl::POE::],
1214 [Prima:: => AnyEvent::Impl::POE::], 1288 [Prima:: => AnyEvent::Impl::POE::],
1215 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], 1289 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1216 [Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::], 1290 [Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1217 [FLTK:: => AnyEvent::Impl::FLTK::], 1291 [FLTK:: => AnyEvent::Impl::FLTK::],
1218); 1292);
1219 1293
1220our %method = map +($_ => 1), 1294our %method = map +($_ => 1),
1221 qw(io timer time now now_update signal child idle condvar one_event DESTROY); 1295 qw(io timer time now now_update signal child idle condvar DESTROY);
1222
1223our @post_detect;
1224
1225sub post_detect(&) {
1226 my ($cb) = @_;
1227
1228 push @post_detect, $cb;
1229
1230 defined wantarray
1231 ? bless \$cb, "AnyEvent::Util::postdetect"
1232 : ()
1233}
1234
1235sub AnyEvent::Util::postdetect::DESTROY {
1236 @post_detect = grep $_ != ${$_[0]}, @post_detect;
1237}
1238 1296
1239sub detect() { 1297sub detect() {
1240 # free some memory 1298 # free some memory
1241 *detect = sub () { $MODEL }; 1299 *detect = sub () { $MODEL };
1242 1300
1243 local $!; # for good measure 1301 local $!; # for good measure
1244 local $SIG{__DIE__}; 1302 local $SIG{__DIE__};
1245 1303
1246 if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) { 1304 if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1247 my $model = "AnyEvent::Impl::$1"; 1305 my $model = $1;
1306 $model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1248 if (eval "require $model") { 1307 if (eval "require $model") {
1249 $MODEL = $model; 1308 $MODEL = $model;
1250 warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2; 1309 warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
1251 } else { 1310 } else {
1252 warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE; 1311 warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;
… …
1285 $MODEL 1344 $MODEL
1286 or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n"; 1345 or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n";
1287 } 1346 }
1288 } 1347 }
1289 1348
1290 @models = (); # free probe data 1349 # free memory only needed for probing
1350 undef @models;
1351 undef @REGISTRY;
1291 1352
1292 push @{"$MODEL\::ISA"}, "AnyEvent::Base"; 1353 push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1293 unshift @ISA, $MODEL; 1354 unshift @ISA, $MODEL;
1294 1355
1295 # now nuke some methods that are overridden by the backend. 1356 # now nuke some methods that are overridden by the backend.
1296 # SUPER is not allowed. 1357 # SUPER usage is not allowed in these.
1297 for (qw(time signal child idle)) { 1358 for (qw(time signal child idle)) {
1298 undef &{"AnyEvent::Base::$_"} 1359 undef &{"AnyEvent::Base::$_"}
1299 if defined &{"$MODEL\::$_"}; 1360 if defined &{"$MODEL\::$_"};
1300 } 1361 }
1301 1362
… …
1304 warn "AnyEvent: cannot load AnyEvent::Strict: $@" 1365 warn "AnyEvent: cannot load AnyEvent::Strict: $@"
1305 if $@ && $VERBOSE; 1366 if $@ && $VERBOSE;
1306 } 1367 }
1307 1368
1308 (shift @post_detect)->() while @post_detect; 1369 (shift @post_detect)->() while @post_detect;
1370 undef @post_detect;
1309 1371
1310 *post_detect = sub(&) { 1372 *post_detect = sub(&) {
1311 shift->(); 1373 shift->();
1312 1374
1313 undef 1375 undef
1314 }; 1376 };
1315 1377
1378 # recover a few more bytes
1379 postpone {
1380 undef &AUTOLOAD;
1381 };
1382
1316 $MODEL 1383 $MODEL
1317} 1384}
1385
1386our %method = map +($_ => 1),
1387 qw(io timer time now now_update signal child idle condvar DESTROY);
1318 1388
1319sub AUTOLOAD { 1389sub AUTOLOAD {
1320 (my $func = $AUTOLOAD) =~ s/.*://; 1390 (my $func = $AUTOLOAD) =~ s/.*://;
1321 1391
1322 $method{$func} 1392 $method{$func}
1323 or Carp::croak "$func: not a valid AnyEvent class method"; 1393 or Carp::croak "$func: not a valid AnyEvent class method";
1394
1395 # free some memory
1396 undef %method;
1324 1397
1325 detect; 1398 detect;
1326 1399
1327 my $class = shift; 1400 my $class = shift;
1328 $class->$func (@_); 1401 $class->$func (@_);
… …
1357 1430
1358package AE; 1431package AE;
1359 1432
1360our $VERSION = $AnyEvent::VERSION; 1433our $VERSION = $AnyEvent::VERSION;
1361 1434
1435
1436sub _reset() {
1437 eval q{
1362# fall back to the main API by default - backends and AnyEvent::Base 1438 # fall back to the main API by default - backends and AnyEvent::Base
1363# implementations can overwrite these. 1439 # implementations can overwrite these.
1364 1440
1365sub io($$$) { 1441 sub io($$$) {
1366 AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2]) 1442 AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1367} 1443 }
1368 1444
1369sub timer($$$) { 1445 sub timer($$$) {
1370 AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]) 1446 AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1371} 1447 }
1372 1448
1373sub signal($$) { 1449 sub signal($$) {
1374 AnyEvent->signal (signal => $_[0], cb => $_[1]) 1450 AnyEvent->signal (signal => $_[0], cb => $_[1])
1375} 1451 }
1376 1452
1377sub child($$) { 1453 sub child($$) {
1378 AnyEvent->child (pid => $_[0], cb => $_[1]) 1454 AnyEvent->child (pid => $_[0], cb => $_[1])
1379} 1455 }
1380 1456
1381sub idle($) { 1457 sub idle($) {
1382 AnyEvent->idle (cb => $_[0]) 1458 AnyEvent->idle (cb => $_[0])
1383} 1459 }
1384 1460
1385sub cv(;&) { 1461 sub cv(;&) {
1386 AnyEvent->condvar (@_ ? (cb => $_[0]) : ()) 1462 AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1387} 1463 }
1388 1464
1389sub now() { 1465 sub now() {
1390 AnyEvent->now 1466 AnyEvent->now
1391} 1467 }
1392 1468
1393sub now_update() { 1469 sub now_update() {
1394 AnyEvent->now_update 1470 AnyEvent->now_update
1395} 1471 }
1396 1472
1397sub time() { 1473 sub time() {
1398 AnyEvent->time 1474 AnyEvent->time
1475 }
1476
1477 *postpone = \&AnyEvent::postpone;
1478 };
1479 die if $@;
1399} 1480}
1481
1482BEGIN { _reset }
1400 1483
1401package AnyEvent::Base; 1484package AnyEvent::Base;
1402 1485
1403# default implementations for many methods 1486# default implementations for many methods
1404 1487
… …
1423 1506
1424*now = \&time; 1507*now = \&time;
1425 1508
1426sub now_update { } 1509sub now_update { }
1427 1510
1511sub _poll {
1512 Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
1513}
1514
1428# default implementation for ->condvar 1515# default implementation for ->condvar
1516# in fact, the default should not be overwritten
1429 1517
1430sub condvar { 1518sub condvar {
1431 eval q{ # poor man's autoloading {} 1519 eval q{ # poor man's autoloading {}
1432 *condvar = sub { 1520 *condvar = sub {
1433 bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar" 1521 bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
… …
1603 : sysread $SIGPIPE_R, (my $dummy), 9; 1691 : sysread $SIGPIPE_R, (my $dummy), 9;
1604 1692
1605 while (%SIG_EV) { 1693 while (%SIG_EV) {
1606 for (keys %SIG_EV) { 1694 for (keys %SIG_EV) {
1607 delete $SIG_EV{$_}; 1695 delete $SIG_EV{$_};
1608 $_->() for values %{ $SIG_CB{$_} || {} }; 1696 &$_ for values %{ $SIG_CB{$_} || {} };
1609 } 1697 }
1610 } 1698 }
1611 }; 1699 };
1612 }; 1700 };
1613 die if $@; 1701 die if $@;
… …
1640 }; 1728 };
1641 1729
1642 *child = sub { 1730 *child = sub {
1643 my (undef, %arg) = @_; 1731 my (undef, %arg) = @_;
1644 1732
1645 defined (my $pid = $arg{pid} + 0) 1733 my $pid = $arg{pid};
1646 or Carp::croak "required option 'pid' is missing"; 1734 my $cb = $arg{cb};
1647 1735
1648 $PID_CB{$pid}{$arg{cb}} = $arg{cb}; 1736 $PID_CB{$pid}{$cb+0} = $cb;
1649 1737
1650 unless ($CHLD_W) { 1738 unless ($CHLD_W) {
1651 $CHLD_W = AE::signal CHLD => \&_sigchld; 1739 $CHLD_W = AE::signal CHLD => \&_sigchld;
1652 # child could be a zombie already, so make at least one round 1740 # child could be a zombie already, so make at least one round
1653 &_sigchld; 1741 &_sigchld;
1654 } 1742 }
1655 1743
1656 bless [$pid, $arg{cb}], "AnyEvent::Base::child" 1744 bless [$pid, $cb+0], "AnyEvent::Base::child"
1657 }; 1745 };
1658 1746
1659 *AnyEvent::Base::child::DESTROY = sub { 1747 *AnyEvent::Base::child::DESTROY = sub {
1660 my ($pid, $cb) = @{$_[0]}; 1748 my ($pid, $icb) = @{$_[0]};
1661 1749
1662 delete $PID_CB{$pid}{$cb}; 1750 delete $PID_CB{$pid}{$icb};
1663 delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} }; 1751 delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1664 1752
1665 undef $CHLD_W unless keys %PID_CB; 1753 undef $CHLD_W unless keys %PID_CB;
1666 }; 1754 };
1667 }; 1755 };
… …
1739 1827
1740sub _send { 1828sub _send {
1741 # nop 1829 # nop
1742} 1830}
1743 1831
1832sub _wait {
1833 AnyEvent->_poll until $_[0]{_ae_sent};
1834}
1835
1744sub send { 1836sub send {
1745 my $cv = shift; 1837 my $cv = shift;
1746 $cv->{_ae_sent} = [@_]; 1838 $cv->{_ae_sent} = [@_];
1747 (delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb}; 1839 (delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1748 $cv->_send; 1840 $cv->_send;
… …
1755 1847
1756sub ready { 1848sub ready {
1757 $_[0]{_ae_sent} 1849 $_[0]{_ae_sent}
1758} 1850}
1759 1851
1760sub _wait {
1761 $WAITING
1762 and !$_[0]{_ae_sent}
1763 and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1764
1765 local $WAITING = 1;
1766 AnyEvent->one_event while !$_[0]{_ae_sent};
1767}
1768
1769sub recv { 1852sub recv {
1853 unless ($_[0]{_ae_sent}) {
1854 $WAITING
1855 and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
1856
1857 local $WAITING = 1;
1770 $_[0]->_wait; 1858 $_[0]->_wait;
1859 }
1771 1860
1772 Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; 1861 $_[0]{_ae_croak}
1773 wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] 1862 and Carp::croak $_[0]{_ae_croak};
1863
1864 wantarray
1865 ? @{ $_[0]{_ae_sent} }
1866 : $_[0]{_ae_sent}[0]
1774} 1867}
1775 1868
1776sub cb { 1869sub cb {
1777 my $cv = shift; 1870 my $cv = shift;
1778 1871
… …
1794 &{ $_[0]{_ae_end_cb} || sub { $_[0]->send } }; 1887 &{ $_[0]{_ae_end_cb} || sub { $_[0]->send } };
1795} 1888}
1796 1889
1797# undocumented/compatibility with pre-3.4 1890# undocumented/compatibility with pre-3.4
1798*broadcast = \&send; 1891*broadcast = \&send;
1799*wait = \&_wait; 1892*wait = \&recv;
1800 1893
1801=head1 ERROR AND EXCEPTION HANDLING 1894=head1 ERROR AND EXCEPTION HANDLING
1802 1895
1803In general, AnyEvent does not do any error handling - it relies on the 1896In general, AnyEvent does not do any error handling - it relies on the
1804caller to do that if required. The L<AnyEvent::Strict> module (see also 1897caller to do that if required. The L<AnyEvent::Strict> module (see also
… …
1859can be very useful, however. 1952can be very useful, however.
1860 1953
1861=item C<PERL_ANYEVENT_MODEL> 1954=item C<PERL_ANYEVENT_MODEL>
1862 1955
1863This can be used to specify the event model to be used by AnyEvent, before 1956This can be used to specify the event model to be used by AnyEvent, before
1864auto detection and -probing kicks in. It must be a string consisting 1957auto detection and -probing kicks in.
1865entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended 1958
1959It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
1960or C<IOAsync>). The string C<AnyEvent::Impl::> gets prepended and the
1866and the resulting module name is loaded and if the load was successful, 1961resulting module name is loaded and - if the load was successful - used as
1867used as event model. If it fails to load AnyEvent will proceed with 1962event model backend. If it fails to load then AnyEvent will proceed with
1868auto detection and -probing. 1963auto detection and -probing.
1869 1964
1870This functionality might change in future versions. 1965If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
1966nothing gets prepended and the module name is used as-is (hint: C<::> at
1967the end of a string designates a module name and quotes it appropriately).
1871 1968
1872For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you 1969For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1873could start your program like this: 1970could start your program like this:
1874 1971
1875 PERL_ANYEVENT_MODEL=Perl perl ... 1972 PERL_ANYEVENT_MODEL=Perl perl ...
1876 1973
1877=item C<PERL_ANYEVENT_PROTOCOLS> 1974=item C<PERL_ANYEVENT_PROTOCOLS>
… …
2576 2673
2577=item L<Time::HiRes> 2674=item L<Time::HiRes>
2578 2675
2579This module is part of perl since release 5.008. It will be used when the 2676This module is part of perl since release 5.008. It will be used when the
2580chosen event library does not come with a timing source of its own. The 2677chosen event library does not come with a timing source of its own. The
2581pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to 2678pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2582try to use a monotonic clock for timing stability. 2679try to use a monotonic clock for timing stability.
2583 2680
2584=back 2681=back
2585 2682
2586 2683
… …
2654 2751
2655FAQ: L<AnyEvent::FAQ>. 2752FAQ: L<AnyEvent::FAQ>.
2656 2753
2657Utility functions: L<AnyEvent::Util>. 2754Utility functions: L<AnyEvent::Util>.
2658 2755
2659Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>, 2756Event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>, L<Glib::EV>,
2660L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. 2757L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.
2661 2758
2662Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, 2759Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2663L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, 2760L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2664L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, 2761L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2665L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>. 2762L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.

Diff Legend

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