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 1.335 by root, Wed Oct 13 01:17:02 2010 UTC vs.
Revision 1.350 by root, Tue Aug 2 20:02:44 2011 UTC

… …
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
… …
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
… …
1157 1152
1158package AnyEvent; 1153package AnyEvent;
1159 1154
1160# basically a tuned-down version of common::sense 1155# basically a tuned-down version of common::sense
1161sub common_sense { 1156sub common_sense {
1162 # from common:.sense 3.3 1157 # from common:.sense 3.4
1163 ${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf3\x0f\xc0\xf0\xfc\x33\x00"; 1158 ${^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) 1159 # use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1165 $^H |= 0x00000600; 1160 $^H |= 0x00000600;
1166} 1161}
1167 1162
1168BEGIN { AnyEvent::common_sense } 1163BEGIN { AnyEvent::common_sense }
1169 1164
1170use Carp (); 1165use Carp ();
1171 1166
1172our $VERSION = '5.271'; 1167our $VERSION = '5.34';
1173our $MODEL; 1168our $MODEL;
1174 1169
1175our $AUTOLOAD; 1170our $AUTOLOAD;
1176our @ISA; 1171our @ISA;
1177 1172
… …
1215 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles 1210 [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles
1216 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program 1211 [Qt:: => AnyEvent::Impl::Qt::], # requires special main program
1217 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza 1212 [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza
1218 [Wx:: => AnyEvent::Impl::POE::], 1213 [Wx:: => AnyEvent::Impl::POE::],
1219 [Prima:: => AnyEvent::Impl::POE::], 1214 [Prima:: => AnyEvent::Impl::POE::],
1220 # IO::Async is just too broken - we would need workarounds for its
1221 # byzantine signal and broken child handling, among others.
1222 # IO::Async is rather hard to detect, as it doesn't have any
1223 # obvious default class.
1224 [IO::Async:: => AnyEvent::Impl::IOAsync::], # requires special main program
1225 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # requires special main program 1215 [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::],
1226 [IO::Async::Notifier:: => AnyEvent::Impl::IOAsync::], # requires special main program 1216 [Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::],
1227 [AnyEvent::Impl::IOAsync:: => AnyEvent::Impl::IOAsync::], # requires special main program 1217 [FLTK:: => AnyEvent::Impl::FLTK::],
1228); 1218);
1229 1219
1230our %method = map +($_ => 1), 1220our %method = map +($_ => 1),
1231 qw(io timer time now now_update signal child idle condvar one_event DESTROY); 1221 qw(io timer time now now_update signal child idle condvar DESTROY);
1232 1222
1233our @post_detect; 1223our @post_detect;
1234 1224
1235sub post_detect(&) { 1225sub post_detect(&) {
1236 my ($cb) = @_; 1226 my ($cb) = @_;
… …
1291 last; 1281 last;
1292 } 1282 }
1293 } 1283 }
1294 1284
1295 $MODEL 1285 $MODEL
1296 or die "No event module selected for AnyEvent and autodetect failed. Install any one of these modules: EV, Event or Glib.\n"; 1286 or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n";
1297 } 1287 }
1298 } 1288 }
1299 1289
1300 @models = (); # free probe data 1290 @models = (); # free probe data
1301 1291
1302 push @{"$MODEL\::ISA"}, "AnyEvent::Base"; 1292 push @{"$MODEL\::ISA"}, "AnyEvent::Base";
1303 unshift @ISA, $MODEL; 1293 unshift @ISA, $MODEL;
1304 1294
1305 # now nuke some methods that are overriden by the backend. 1295 # now nuke some methods that are overridden by the backend.
1306 # SUPER is not allowed. 1296 # SUPER is not allowed.
1307 for (qw(time signal child idle)) { 1297 for (qw(time signal child idle)) {
1308 undef &{"AnyEvent::Base::$_"} 1298 undef &{"AnyEvent::Base::$_"}
1309 if defined &{"$MODEL\::$_"}; 1299 if defined &{"$MODEL\::$_"};
1310 } 1300 }
1311 1301
1312 require AnyEvent::Strict if $ENV{PERL_ANYEVENT_STRICT}; 1302 if ($ENV{PERL_ANYEVENT_STRICT}) {
1303 eval { require AnyEvent::Strict };
1304 warn "AnyEvent: cannot load AnyEvent::Strict: $@"
1305 if $@ && $VERBOSE;
1306 }
1313 1307
1314 (shift @post_detect)->() while @post_detect; 1308 (shift @post_detect)->() while @post_detect;
1315 1309
1316 *post_detect = sub(&) { 1310 *post_detect = sub(&) {
1317 shift->(); 1311 shift->();
… …
1624# default implementation for ->child 1618# default implementation for ->child
1625 1619
1626our %PID_CB; 1620our %PID_CB;
1627our $CHLD_W; 1621our $CHLD_W;
1628our $CHLD_DELAY_W; 1622our $CHLD_DELAY_W;
1629our $WNOHANG;
1630 1623
1631# used by many Impl's 1624# used by many Impl's
1632sub _emit_childstatus($$) { 1625sub _emit_childstatus($$) {
1633 my (undef, $rpid, $rstatus) = @_; 1626 my (undef, $rpid, $rstatus) = @_;
1634 1627
… …
1641 eval q{ # poor man's autoloading {} 1634 eval q{ # poor man's autoloading {}
1642 *_sigchld = sub { 1635 *_sigchld = sub {
1643 my $pid; 1636 my $pid;
1644 1637
1645 AnyEvent->_emit_childstatus ($pid, $?) 1638 AnyEvent->_emit_childstatus ($pid, $?)
1646 while ($pid = waitpid -1, $WNOHANG) > 0; 1639 while ($pid = waitpid -1, WNOHANG) > 0;
1647 }; 1640 };
1648 1641
1649 *child = sub { 1642 *child = sub {
1650 my (undef, %arg) = @_; 1643 my (undef, %arg) = @_;
1651 1644
1652 defined (my $pid = $arg{pid} + 0) 1645 defined (my $pid = $arg{pid} + 0)
1653 or Carp::croak "required option 'pid' is missing"; 1646 or Carp::croak "required option 'pid' is missing";
1654 1647
1655 $PID_CB{$pid}{$arg{cb}} = $arg{cb}; 1648 $PID_CB{$pid}{$arg{cb}} = $arg{cb};
1656
1657 # WNOHANG is almost cetrainly 1 everywhere
1658 $WNOHANG ||= $^O =~ /^(?:openbsd|netbsd|linux|freebsd|cygwin|MSWin32)$/
1659 ? 1
1660 : eval { local $SIG{__DIE__}; require POSIX; &POSIX::WNOHANG } || 1;
1661 1649
1662 unless ($CHLD_W) { 1650 unless ($CHLD_W) {
1663 $CHLD_W = AE::signal CHLD => \&_sigchld; 1651 $CHLD_W = AE::signal CHLD => \&_sigchld;
1664 # child could be a zombie already, so make at least one round 1652 # child could be a zombie already, so make at least one round
1665 &_sigchld; 1653 &_sigchld;
… …
1751 1739
1752sub _send { 1740sub _send {
1753 # nop 1741 # nop
1754} 1742}
1755 1743
1744sub _wait {
1745 Carp::croak "$AnyEvent::MODEL does not support blocking waits. Caught";
1746}
1747
1756sub send { 1748sub send {
1757 my $cv = shift; 1749 my $cv = shift;
1758 $cv->{_ae_sent} = [@_]; 1750 $cv->{_ae_sent} = [@_];
1759 (delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb}; 1751 (delete $cv->{_ae_cb})->($cv) if $cv->{_ae_cb};
1760 $cv->_send; 1752 $cv->_send;
… …
1767 1759
1768sub ready { 1760sub ready {
1769 $_[0]{_ae_sent} 1761 $_[0]{_ae_sent}
1770} 1762}
1771 1763
1772sub _wait {
1773 $WAITING
1774 and !$_[0]{_ae_sent}
1775 and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1776
1777 local $WAITING = 1;
1778 AnyEvent->one_event while !$_[0]{_ae_sent};
1779}
1780
1781sub recv { 1764sub recv {
1765 unless ($_[0]{_ae_sent}) {
1766 $WAITING
1767 and Carp::croak "AnyEvent::CondVar: recursive blocking wait detected";
1768
1769 local $WAITING = 1;
1782 $_[0]->_wait; 1770 $_[0]->_wait;
1771 }
1783 1772
1784 Carp::croak $_[0]{_ae_croak} if $_[0]{_ae_croak}; 1773 $_[0]{_ae_croak}
1785 wantarray ? @{ $_[0]{_ae_sent} } : $_[0]{_ae_sent}[0] 1774 and Carp::croak $_[0]{_ae_croak};
1775
1776 wantarray
1777 ? @{ $_[0]{_ae_sent} }
1778 : $_[0]{_ae_sent}[0]
1786} 1779}
1787 1780
1788sub cb { 1781sub cb {
1789 my $cv = shift; 1782 my $cv = shift;
1790 1783
… …
1806 &{ $_[0]{_ae_end_cb} || sub { $_[0]->send } }; 1799 &{ $_[0]{_ae_end_cb} || sub { $_[0]->send } };
1807} 1800}
1808 1801
1809# undocumented/compatibility with pre-3.4 1802# undocumented/compatibility with pre-3.4
1810*broadcast = \&send; 1803*broadcast = \&send;
1811*wait = \&_wait; 1804*wait = \&recv;
1812 1805
1813=head1 ERROR AND EXCEPTION HANDLING 1806=head1 ERROR AND EXCEPTION HANDLING
1814 1807
1815In general, AnyEvent does not do any error handling - it relies on the 1808In general, AnyEvent does not do any error handling - it relies on the
1816caller to do that if required. The L<AnyEvent::Strict> module (see also 1809caller to do that if required. The L<AnyEvent::Strict> module (see also

Diff Legend

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