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 1.350 by root, Tue Aug 2 20:02:44 2011 UTC vs.
Revision 1.357 by root, Sat Aug 13 02:20:29 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
… …
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. 881 AnyEvent::Impl::IOAsync based on IO::Async.
882 AnyEvent::Impl::Cocoa based on Cocoa::EventLoop. 882 AnyEvent::Impl::Cocoa based on Cocoa::EventLoop.
883 AnyEvent::Impl::FLTK based on FLTK. 883 AnyEvent::Impl::FLTK2 based on FLTK (fltk 2 binding).
884 884
885=item Backends with special needs. 885=item Backends with special needs.
886 886
887Qt requires the Qt::Application to be instantiated first, but will 887Qt requires the Qt::Application to be instantiated first, but will
888otherwise be picked up automatically. As long as the main program 888otherwise be picked up automatically. As long as the main program
… …
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
… …
1165use Carp (); 1205use Carp ();
1166 1206
1167our $VERSION = '5.34'; 1207our $VERSION = '5.34';
1168our $MODEL; 1208our $MODEL;
1169 1209
1170our $AUTOLOAD;
1171our @ISA; 1210our @ISA;
1172 1211
1173our @REGISTRY; 1212our @REGISTRY;
1174 1213
1175our $VERBOSE; 1214our $VERBOSE;
… …
1195 $PROTOCOL{$_} = ++$idx 1234 $PROTOCOL{$_} = ++$idx
1196 for reverse split /\s*,\s*/, 1235 for reverse split /\s*,\s*/,
1197 $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; 1236 $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6";
1198} 1237}
1199 1238
1239our @post_detect;
1240
1241sub post_detect(&) {
1242 my ($cb) = @_;
1243
1244 push @post_detect, $cb;
1245
1246 defined wantarray
1247 ? bless \$cb, "AnyEvent::Util::postdetect"
1248 : ()
1249}
1250
1251sub AnyEvent::Util::postdetect::DESTROY {
1252 @post_detect = grep $_ != ${$_[0]}, @post_detect;
1253}
1254
1255our $POSTPONE_W;
1256our @POSTPONE;
1257
1258sub _postpone_exec {
1259 undef $POSTPONE_W;
1260
1261 &{ shift @POSTPONE }
1262 while @POSTPONE;
1263}
1264
1265sub postpone(&) {
1266 push @POSTPONE, shift;
1267
1268 $POSTPONE_W ||= AE::timer (0, 0, \&_postpone_exec);
1269
1270 ()
1271}
1272
1200my @models = ( 1273our @models = (
1201 [EV:: => AnyEvent::Impl::EV:: , 1], 1274 [EV:: => AnyEvent::Impl::EV:: , 1],
1202 [AnyEvent::Impl::Perl:: => AnyEvent::Impl::Perl:: , 1], 1275 [AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1],
1203 # everything below here will not (normally) be autoprobed 1276 # everything below here will not (normally) be autoprobed
1204 # as the pureperl backend should work everywhere 1277 # as the pure perl backend should work everywhere
1205 # and is usually faster 1278 # and is usually faster
1206 [Event:: => AnyEvent::Impl::Event::, 1], 1279 [Event:: => AnyEvent::Impl::Event::, 1],
1207 [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers 1280 [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers
1208 [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy 1281 [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy
1209 [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package 1282 [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package
1210 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles 1283 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1211 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program 1284 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1212 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza 1285 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1213 [Wx:: => AnyEvent::Impl::POE::], 1286 [Wx:: => AnyEvent::Impl::POE::],
1214 [Prima:: => AnyEvent::Impl::POE::], 1287 [Prima:: => AnyEvent::Impl::POE::],
1215 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], 1288 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect
1216 [Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::], 1289 [Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1217 [FLTK:: => AnyEvent::Impl::FLTK::], 1290 [FLTK:: => AnyEvent::Impl::FLTK2::],
1218); 1291);
1219 1292
1220our %method = map +($_ => 1), 1293# all autoloaded methods reserve the complete glob, not just the method slot.
1294# due to bugs in perls method cache implementation.
1221 qw(io timer time now now_update signal child idle condvar DESTROY); 1295our @methods = qw(io timer time now now_update signal child idle condvar);
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() {
1298 local $!; # for good measure
1299 local $SIG{__DIE__}; # we use eval
1300
1240 # free some memory 1301 # free some memory
1241 *detect = sub () { $MODEL }; 1302 *detect = sub () { $MODEL };
1303 # undef &func doesn't correctly update the method cache. grmbl.
1304 # so we delete the whole glob. grmbl.
1305 # otoh, perl doesn't let me undef an active usb, but it lets me free
1306 # a glob with an active sub. hrm. i hope it works, but perl is
1307 # usually buggy in this department. sigh.
1308 delete @{"AnyEvent::"}{@methods};
1309 undef @methods;
1242 1310
1243 local $!; # for good measure
1244 local $SIG{__DIE__};
1245
1246 if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z]+)$/) { 1311 if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1247 my $model = "AnyEvent::Impl::$1"; 1312 my $model = $1;
1313 $model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1248 if (eval "require $model") { 1314 if (eval "require $model") {
1249 $MODEL = $model; 1315 $MODEL = $model;
1250 warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2; 1316 warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2;
1251 } else { 1317 } else {
1252 warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE; 1318 warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE;
… …
1285 $MODEL 1351 $MODEL
1286 or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n"; 1352 or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n";
1287 } 1353 }
1288 } 1354 }
1289 1355
1290 @models = (); # free probe data 1356 # free memory only needed for probing
1357 undef @models;
1358 undef @REGISTRY;
1291 1359
1292 push @{"$MODEL\::ISA"}, "AnyEvent::Base"; 1360 push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1293 unshift @ISA, $MODEL; 1361 unshift @ISA, $MODEL;
1294 1362
1295 # now nuke some methods that are overridden by the backend. 1363 # now nuke some methods that are overridden by the backend.
1296 # SUPER is not allowed. 1364 # SUPER usage is not allowed in these.
1297 for (qw(time signal child idle)) { 1365 for (qw(time signal child idle)) {
1298 undef &{"AnyEvent::Base::$_"} 1366 undef &{"AnyEvent::Base::$_"}
1299 if defined &{"$MODEL\::$_"}; 1367 if defined &{"$MODEL\::$_"};
1300 } 1368 }
1301 1369
1302 if ($ENV{PERL_ANYEVENT_STRICT}) { 1370 if ($ENV{PERL_ANYEVENT_STRICT}) {
1303 eval { require AnyEvent::Strict }; 1371 require AnyEvent::Strict;
1304 warn "AnyEvent: cannot load AnyEvent::Strict: $@"
1305 if $@ && $VERBOSE;
1306 } 1372 }
1307 1373
1374 if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) {
1375 require AnyEvent::Debug;
1376 AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP});
1377 }
1378
1379 if (exists $ENV{PERL_ANYEVENT_DEBUG_SHELL}) {
1380 require AnyEvent::Debug;
1381 #d#
1382 }
1383
1308 (shift @post_detect)->() while @post_detect; 1384 (shift @post_detect)->() while @post_detect;
1385 undef @post_detect;
1309 1386
1310 *post_detect = sub(&) { 1387 *post_detect = sub(&) {
1311 shift->(); 1388 shift->();
1312 1389
1313 undef 1390 undef
1314 }; 1391 };
1315 1392
1316 $MODEL 1393 $MODEL
1317} 1394}
1318 1395
1319sub AUTOLOAD { 1396for my $name (@methods) {
1320 (my $func = $AUTOLOAD) =~ s/.*://; 1397 *$name = sub {
1321
1322 $method{$func}
1323 or Carp::croak "$func: not a valid AnyEvent class method";
1324
1325 detect; 1398 detect;
1326 1399 # we use goto because
1327 my $class = shift; 1400 # a) it makes the thunk more transparent
1328 $class->$func (@_); 1401 # b) it allows us to delete the thunk later
1402 goto &{ UNIVERSAL::can AnyEvent => "SUPER::$name" }
1403 };
1329} 1404}
1330 1405
1331# utility function to dup a filehandle. this is used by many backends 1406# utility function to dup a filehandle. this is used by many backends
1332# to support binding more than one watcher per filehandle (they usually 1407# to support binding more than one watcher per filehandle (they usually
1333# allow only one watcher per fd, so we dup it to get a different one). 1408# allow only one watcher per fd, so we dup it to get a different one).
… …
1357 1432
1358package AE; 1433package AE;
1359 1434
1360our $VERSION = $AnyEvent::VERSION; 1435our $VERSION = $AnyEvent::VERSION;
1361 1436
1437sub _reset() {
1438 eval q{
1362# fall back to the main API by default - backends and AnyEvent::Base 1439 # fall back to the main API by default - backends and AnyEvent::Base
1363# implementations can overwrite these. 1440 # implementations can overwrite these.
1364 1441
1365sub io($$$) { 1442 sub io($$$) {
1366 AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2]) 1443 AnyEvent->io (fh => $_[0], poll => $_[1] ? "w" : "r", cb => $_[2])
1367} 1444 }
1368 1445
1369sub timer($$$) { 1446 sub timer($$$) {
1370 AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2]) 1447 AnyEvent->timer (after => $_[0], interval => $_[1], cb => $_[2])
1371} 1448 }
1372 1449
1373sub signal($$) { 1450 sub signal($$) {
1374 AnyEvent->signal (signal => $_[0], cb => $_[1]) 1451 AnyEvent->signal (signal => $_[0], cb => $_[1])
1375} 1452 }
1376 1453
1377sub child($$) { 1454 sub child($$) {
1378 AnyEvent->child (pid => $_[0], cb => $_[1]) 1455 AnyEvent->child (pid => $_[0], cb => $_[1])
1379} 1456 }
1380 1457
1381sub idle($) { 1458 sub idle($) {
1382 AnyEvent->idle (cb => $_[0]) 1459 AnyEvent->idle (cb => $_[0]);
1383} 1460 }
1384 1461
1385sub cv(;&) { 1462 sub cv(;&) {
1386 AnyEvent->condvar (@_ ? (cb => $_[0]) : ()) 1463 AnyEvent->condvar (@_ ? (cb => $_[0]) : ())
1387} 1464 }
1388 1465
1389sub now() { 1466 sub now() {
1390 AnyEvent->now 1467 AnyEvent->now
1391} 1468 }
1392 1469
1393sub now_update() { 1470 sub now_update() {
1394 AnyEvent->now_update 1471 AnyEvent->now_update
1395} 1472 }
1396 1473
1397sub time() { 1474 sub time() {
1398 AnyEvent->time 1475 AnyEvent->time
1476 }
1477
1478 *postpone = \&AnyEvent::postpone;
1479 };
1480 die if $@;
1399} 1481}
1482
1483BEGIN { _reset }
1400 1484
1401package AnyEvent::Base; 1485package AnyEvent::Base;
1402 1486
1403# default implementations for many methods 1487# default implementations for many methods
1404 1488
… …
1423 1507
1424*now = \&time; 1508*now = \&time;
1425 1509
1426sub now_update { } 1510sub now_update { }
1427 1511
1512sub _poll {
1513 Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
1514}
1515
1428# default implementation for ->condvar 1516# default implementation for ->condvar
1517# in fact, the default should not be overwritten
1429 1518
1430sub condvar { 1519sub condvar {
1431 eval q{ # poor man's autoloading {} 1520 eval q{ # poor man's autoloading {}
1432 *condvar = sub { 1521 *condvar = sub {
1433 bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar" 1522 bless { @_ == 3 ? (_ae_cb => $_[2]) : () }, "AnyEvent::CondVar"
… …
1603 : sysread $SIGPIPE_R, (my $dummy), 9; 1692 : sysread $SIGPIPE_R, (my $dummy), 9;
1604 1693
1605 while (%SIG_EV) { 1694 while (%SIG_EV) {
1606 for (keys %SIG_EV) { 1695 for (keys %SIG_EV) {
1607 delete $SIG_EV{$_}; 1696 delete $SIG_EV{$_};
1608 $_->() for values %{ $SIG_CB{$_} || {} }; 1697 &$_ for values %{ $SIG_CB{$_} || {} };
1609 } 1698 }
1610 } 1699 }
1611 }; 1700 };
1612 }; 1701 };
1613 die if $@; 1702 die if $@;
… …
1640 }; 1729 };
1641 1730
1642 *child = sub { 1731 *child = sub {
1643 my (undef, %arg) = @_; 1732 my (undef, %arg) = @_;
1644 1733
1645 defined (my $pid = $arg{pid} + 0) 1734 my $pid = $arg{pid};
1646 or Carp::croak "required option 'pid' is missing"; 1735 my $cb = $arg{cb};
1647 1736
1648 $PID_CB{$pid}{$arg{cb}} = $arg{cb}; 1737 $PID_CB{$pid}{$cb+0} = $cb;
1649 1738
1650 unless ($CHLD_W) { 1739 unless ($CHLD_W) {
1651 $CHLD_W = AE::signal CHLD => \&_sigchld; 1740 $CHLD_W = AE::signal CHLD => \&_sigchld;
1652 # child could be a zombie already, so make at least one round 1741 # child could be a zombie already, so make at least one round
1653 &_sigchld; 1742 &_sigchld;
1654 } 1743 }
1655 1744
1656 bless [$pid, $arg{cb}], "AnyEvent::Base::child" 1745 bless [$pid, $cb+0], "AnyEvent::Base::child"
1657 }; 1746 };
1658 1747
1659 *AnyEvent::Base::child::DESTROY = sub { 1748 *AnyEvent::Base::child::DESTROY = sub {
1660 my ($pid, $cb) = @{$_[0]}; 1749 my ($pid, $icb) = @{$_[0]};
1661 1750
1662 delete $PID_CB{$pid}{$cb}; 1751 delete $PID_CB{$pid}{$icb};
1663 delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} }; 1752 delete $PID_CB{$pid} unless keys %{ $PID_CB{$pid} };
1664 1753
1665 undef $CHLD_W unless keys %PID_CB; 1754 undef $CHLD_W unless keys %PID_CB;
1666 }; 1755 };
1667 }; 1756 };
… …
1680 1769
1681 my ($cb, $w, $rcb) = $arg{cb}; 1770 my ($cb, $w, $rcb) = $arg{cb};
1682 1771
1683 $rcb = sub { 1772 $rcb = sub {
1684 if ($cb) { 1773 if ($cb) {
1685 $w = _time; 1774 $w = AE::time;
1686 &$cb; 1775 &$cb;
1687 $w = _time - $w; 1776 $w = AE::time - $w;
1688 1777
1689 # never use more then 50% of the time for the idle watcher, 1778 # never use more then 50% of the time for the idle watcher,
1690 # within some limits 1779 # within some limits
1691 $w = 0.0001 if $w < 0.0001; 1780 $w = 0.0001 if $w < 0.0001;
1692 $w = 5 if $w > 5; 1781 $w = 5 if $w > 5;
… …
1740sub _send { 1829sub _send {
1741 # nop 1830 # nop
1742} 1831}
1743 1832
1744sub _wait { 1833sub _wait {
1745 Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught"; 1834 AnyEvent->_poll until $_[0]{_ae_sent};
1746} 1835}
1747 1836
1748sub send { 1837sub send {
1749 my $cv = shift; 1838 my $cv = shift;
1750 $cv->{_ae_sent} = [@_]; 1839 $cv->{_ae_sent} = [@_];
… …
1762} 1851}
1763 1852
1764sub recv { 1853sub recv {
1765 unless ($_[0]{_ae_sent}) { 1854 unless ($_[0]{_ae_sent}) {
1766 $WAITING 1855 $WAITING
1767 and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected"; 1856 and Carp::croak "AnyEvent::CondVar: recursive blocking wait attempted";
1768 1857
1769 local $WAITING = 1; 1858 local $WAITING = 1;
1770 $_[0]->_wait; 1859 $_[0]->_wait;
1771 } 1860 }
1772 1861
… …
1864can be very useful, however. 1953can be very useful, however.
1865 1954
1866=item C<PERL_ANYEVENT_MODEL> 1955=item C<PERL_ANYEVENT_MODEL>
1867 1956
1868This can be used to specify the event model to be used by AnyEvent, before 1957This can be used to specify the event model to be used by AnyEvent, before
1869auto detection and -probing kicks in. It must be a string consisting 1958auto detection and -probing kicks in.
1870entirely of ASCII letters. The string C<AnyEvent::Impl::> gets prepended 1959
1960It normally is a string consisting entirely of ASCII letters (e.g. C<EV>
1961or C<IOAsync>). The string C<AnyEvent::Impl::> gets prepended and the
1871and the resulting module name is loaded and if the load was successful, 1962resulting module name is loaded and - if the load was successful - used as
1872used as event model. If it fails to load AnyEvent will proceed with 1963event model backend. If it fails to load then AnyEvent will proceed with
1873auto detection and -probing. 1964auto detection and -probing.
1874 1965
1875This functionality might change in future versions. 1966If the string ends with C<::> instead (e.g. C<AnyEvent::Impl::EV::>) then
1967nothing gets prepended and the module name is used as-is (hint: C<::> at
1968the end of a string designates a module name and quotes it appropriately).
1876 1969
1877For example, to force the pure perl model (L<AnyEvent::Impl::Perl>) you 1970For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
1878could start your program like this: 1971could start your program like this:
1879 1972
1880 PERL_ANYEVENT_MODEL=Perl perl ... 1973 PERL_ANYEVENT_MODEL=Perl perl ...
1881 1974
1882=item C<PERL_ANYEVENT_PROTOCOLS> 1975=item C<PERL_ANYEVENT_PROTOCOLS>
… …
2581 2674
2582=item L<Time::HiRes> 2675=item L<Time::HiRes>
2583 2676
2584This module is part of perl since release 5.008. It will be used when the 2677This module is part of perl since release 5.008. It will be used when the
2585chosen event library does not come with a timing source of its own. The 2678chosen event library does not come with a timing source of its own. The
2586pure-perl event loop (L<AnyEvent::Impl::Perl>) will additionally use it to 2679pure-perl event loop (L<AnyEvent::Loop>) will additionally load it to
2587try to use a monotonic clock for timing stability. 2680try to use a monotonic clock for timing stability.
2588 2681
2589=back 2682=back
2590 2683
2591 2684
… …
2659 2752
2660FAQ: L<AnyEvent::FAQ>. 2753FAQ: L<AnyEvent::FAQ>.
2661 2754
2662Utility functions: L<AnyEvent::Util>. 2755Utility functions: L<AnyEvent::Util>.
2663 2756
2664Event modules: L<EV>, L<EV::Glib>, L<Glib::EV>, L<Event>, L<Glib::Event>, 2757Event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>, L<Glib::EV>,
2665L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. 2758L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>.
2666 2759
2667Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, 2760Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>,
2668L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, 2761L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>,
2669L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, 2762L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>,
2670L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>. 2763L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>.

Diff Legend

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