1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | AnyEvent - the DBI of event loop programming |
3 | AnyEvent - the DBI of event loop programming |
4 | |
4 | |
5 | EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, rxvt-unicode, IO::Async, Qt |
5 | EV, Event, Glib, Tk, Perl, Event::Lib, Irssi, rxvt-unicode, IO::Async, Qt, |
6 | and POE are various supported event loops/environments. |
6 | FLTK and POE are various supported event loops/environments. |
7 | |
7 | |
8 | =head1 SYNOPSIS |
8 | =head1 SYNOPSIS |
9 | |
9 | |
10 | use AnyEvent; |
10 | use AnyEvent; |
11 | |
11 | |
… | |
… | |
415 | not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's |
415 | not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's |
416 | pure perl implementation). |
416 | pure perl implementation). |
417 | |
417 | |
418 | =head3 Safe/Unsafe Signals |
418 | =head3 Safe/Unsafe Signals |
419 | |
419 | |
420 | Perl signals can be either "safe" (synchronous to opcode handling) or |
420 | Perl signals can be either "safe" (synchronous to opcode handling) |
421 | "unsafe" (asynchronous) - the former might get delayed indefinitely, the |
421 | or "unsafe" (asynchronous) - the former might delay signal delivery |
422 | latter might corrupt your memory. |
422 | indefinitely, the latter might corrupt your memory. |
423 | |
423 | |
424 | AnyEvent signal handlers are, in addition, synchronous to the event loop, |
424 | AnyEvent signal handlers are, in addition, synchronous to the event loop, |
425 | i.e. they will not interrupt your running perl program but will only be |
425 | i.e. they will not interrupt your running perl program but will only be |
426 | called as part of the normal event handling (just like timer, I/O etc. |
426 | called as part of the normal event handling (just like timer, I/O etc. |
427 | callbacks, too). |
427 | callbacks, too). |
428 | |
428 | |
429 | =head3 Signal Races, Delays and Workarounds |
429 | =head3 Signal Races, Delays and Workarounds |
430 | |
430 | |
431 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
431 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support |
432 | callbacks to signals in a generic way, which is a pity, as you cannot |
432 | attaching callbacks to signals in a generic way, which is a pity, |
433 | do race-free signal handling in perl, requiring C libraries for |
433 | as you cannot do race-free signal handling in perl, requiring |
434 | this. AnyEvent will try to do its best, which means in some cases, |
434 | C libraries for this. AnyEvent will try to do its best, which |
435 | signals will be delayed. The maximum time a signal might be delayed is |
435 | means in some cases, signals will be delayed. The maximum time |
436 | specified in C<$AnyEvent::MAX_SIGNAL_LATENCY> (default: 10 seconds). This |
436 | a signal might be delayed is 10 seconds by default, but can |
437 | variable can be changed only before the first signal watcher is created, |
437 | be overriden via C<$ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY}> or |
438 | and should be left alone otherwise. This variable determines how often |
438 | C<$AnyEvent::MAX_SIGNAL_LATENCY> - see the Ö<ENVIRONMENT VARIABLES> |
439 | AnyEvent polls for signals (in case a wake-up was missed). Higher values |
439 | section for details. |
440 | will cause fewer spurious wake-ups, which is better for power and CPU |
|
|
441 | saving. |
|
|
442 | |
440 | |
443 | All these problems can be avoided by installing the optional |
441 | All these problems can be avoided by installing the optional |
444 | L<Async::Interrupt> module, which works with most event loops. It will not |
442 | L<Async::Interrupt> module, which works with most event loops. It will not |
445 | work with inherently broken event loops such as L<Event> or L<Event::Lib> |
443 | work with inherently broken event loops such as L<Event> or L<Event::Lib> |
446 | (and not with L<POE> currently, as POE does its own workaround with |
444 | (and not with L<POE> currently). For those, you just have to suffer the |
447 | one-second latency). For those, you just have to suffer the delays. |
445 | delays. |
448 | |
446 | |
449 | =head2 CHILD PROCESS WATCHERS |
447 | =head2 CHILD PROCESS WATCHERS |
450 | |
448 | |
451 | $w = AnyEvent->child (pid => <process id>, cb => <callback>); |
449 | $w = AnyEvent->child (pid => <process id>, cb => <callback>); |
452 | |
450 | |
… | |
… | |
878 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
876 | AnyEvent::Impl::EventLib based on Event::Lib, leaks memory and worse. |
879 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
877 | AnyEvent::Impl::POE based on POE, very slow, some limitations. |
880 | AnyEvent::Impl::Irssi used when running within irssi. |
878 | AnyEvent::Impl::Irssi used when running within irssi. |
881 | AnyEvent::Impl::IOAsync based on IO::Async. |
879 | AnyEvent::Impl::IOAsync based on IO::Async. |
882 | AnyEvent::Impl::Cocoa based on Cocoa::EventLoop. |
880 | AnyEvent::Impl::Cocoa based on Cocoa::EventLoop. |
883 | AnyEvent::Impl::FLTK2 based on FLTK (fltk 2 binding). |
881 | AnyEvent::Impl::FLTK based on FLTK (fltk 2 binding). |
884 | |
882 | |
885 | =item Backends with special needs. |
883 | =item Backends with special needs. |
886 | |
884 | |
887 | Qt requires the Qt::Application to be instantiated first, but will |
885 | Qt requires the Qt::Application to be instantiated first, but will |
888 | otherwise be picked up automatically. As long as the main program |
886 | otherwise be picked up automatically. As long as the main program |
… | |
… | |
1049 | It should use C<postpone>: |
1047 | It should use C<postpone>: |
1050 | |
1048 | |
1051 | AnyEvent::postpone { $cb->(undef) }, return # signal error to callback, later |
1049 | AnyEvent::postpone { $cb->(undef) }, return # signal error to callback, later |
1052 | if $some_error_condition; |
1050 | if $some_error_condition; |
1053 | |
1051 | |
|
|
1052 | =item AnyEvent::log $level, $msg[, @args] |
|
|
1053 | |
|
|
1054 | Log the given C<$msg> at the given C<$level>. |
|
|
1055 | |
|
|
1056 | If L<AnyEvent::Log> is not loaded then this function makes a simple test |
|
|
1057 | to see whether the message will be logged. If the test succeeds it will |
|
|
1058 | load AnyEvent::Log and call C<AnyEvent::Log::log> - consequently, look at |
|
|
1059 | the L<AnyEvent::Log> documentation for details. |
|
|
1060 | |
|
|
1061 | If the test fails it will simply return. Right now this happens when a |
|
|
1062 | numerical loglevel is used and it is larger than the level specified via |
|
|
1063 | C<$ENV{PERL_ANYEVENT_VERBOSE}>. |
|
|
1064 | |
|
|
1065 | If you want to sprinkle loads of logging calls around your code, consider |
|
|
1066 | creating a logger callback with the C<AnyEvent::Log::logger> function, |
|
|
1067 | which can reduce typing, codesize and can reduce the logging overhead |
|
|
1068 | enourmously. |
|
|
1069 | |
1054 | =back |
1070 | =back |
1055 | |
1071 | |
1056 | =head1 WHAT TO DO IN A MODULE |
1072 | =head1 WHAT TO DO IN A MODULE |
1057 | |
1073 | |
1058 | As a module author, you should C<use AnyEvent> and call AnyEvent methods |
1074 | As a module author, you should C<use AnyEvent> and call AnyEvent methods |
… | |
… | |
1114 | |
1130 | |
1115 | |
1131 | |
1116 | =head1 OTHER MODULES |
1132 | =head1 OTHER MODULES |
1117 | |
1133 | |
1118 | The following is a non-exhaustive list of additional modules that use |
1134 | The following is a non-exhaustive list of additional modules that use |
1119 | AnyEvent as a client and can therefore be mixed easily with other AnyEvent |
1135 | AnyEvent as a client and can therefore be mixed easily with other |
1120 | modules and other event loops in the same program. Some of the modules |
1136 | AnyEvent modules and other event loops in the same program. Some of the |
1121 | come as part of AnyEvent, the others are available via CPAN. |
1137 | modules come as part of AnyEvent, the others are available via CPAN (see |
|
|
1138 | L<http://search.cpan.org/search?m=module&q=anyevent%3A%3A*> for |
|
|
1139 | a longer non-exhaustive list), and the list is heavily biased towards |
|
|
1140 | modules of the AnyEvent author himself :) |
1122 | |
1141 | |
1123 | =over 4 |
1142 | =over 4 |
1124 | |
1143 | |
1125 | =item L<AnyEvent::Util> |
1144 | =item L<AnyEvent::Util> |
1126 | |
1145 | |
… | |
… | |
1146 | =item L<AnyEvent::HTTP>, L<AnyEvent::IRC>, L<AnyEvent::XMPP>, L<AnyEvent::GPSD>, L<AnyEvent::IGS>, L<AnyEvent::FCP> |
1165 | =item L<AnyEvent::HTTP>, L<AnyEvent::IRC>, L<AnyEvent::XMPP>, L<AnyEvent::GPSD>, L<AnyEvent::IGS>, L<AnyEvent::FCP> |
1147 | |
1166 | |
1148 | Implement event-based interfaces to the protocols of the same name (for |
1167 | Implement event-based interfaces to the protocols of the same name (for |
1149 | the curious, IGS is the International Go Server and FCP is the Freenet |
1168 | the curious, IGS is the International Go Server and FCP is the Freenet |
1150 | Client Protocol). |
1169 | Client Protocol). |
1151 | |
|
|
1152 | =item L<AnyEvent::Handle::UDP> |
|
|
1153 | |
|
|
1154 | Here be danger! |
|
|
1155 | |
|
|
1156 | As Pauli would put it, "Not only is it not right, it's not even wrong!" - |
|
|
1157 | there are so many things wrong with AnyEvent::Handle::UDP, most notably |
|
|
1158 | its use of a stream-based API with a protocol that isn't streamable, that |
|
|
1159 | the only way to improve it is to delete it. |
|
|
1160 | |
|
|
1161 | It features data corruption (but typically only under load) and general |
|
|
1162 | confusion. On top, the author is not only clueless about UDP but also |
|
|
1163 | fact-resistant - some gems of his understanding: "connect doesn't work |
|
|
1164 | with UDP", "UDP packets are not IP packets", "UDP only has datagrams, not |
|
|
1165 | packets", "I don't need to implement proper error checking as UDP doesn't |
|
|
1166 | support error checking" and so on - he doesn't even understand what's |
|
|
1167 | wrong with his module when it is explained to him. |
|
|
1168 | |
|
|
1169 | =item L<AnyEvent::DBI> |
|
|
1170 | |
|
|
1171 | Executes L<DBI> requests asynchronously in a proxy process for you, |
|
|
1172 | notifying you in an event-based way when the operation is finished. |
|
|
1173 | |
1170 | |
1174 | =item L<AnyEvent::AIO> |
1171 | =item L<AnyEvent::AIO> |
1175 | |
1172 | |
1176 | Truly asynchronous (as opposed to non-blocking) I/O, should be in the |
1173 | Truly asynchronous (as opposed to non-blocking) I/O, should be in the |
1177 | toolbox of every event programmer. AnyEvent::AIO transparently fuses |
1174 | toolbox of every event programmer. AnyEvent::AIO transparently fuses |
1178 | L<IO::AIO> and AnyEvent together, giving AnyEvent access to event-based |
1175 | L<IO::AIO> and AnyEvent together, giving AnyEvent access to event-based |
1179 | file I/O, and much more. |
1176 | file I/O, and much more. |
1180 | |
1177 | |
|
|
1178 | =item L<AnyEvent::Filesys::Notify> |
|
|
1179 | |
|
|
1180 | AnyEvent is good for non-blocking stuff, but it can't detect file or |
|
|
1181 | path changes (e.g. "watch this directory for new files", "watch this |
|
|
1182 | file for changes"). The L<AnyEvent::Filesys::Notify> module promises to |
|
|
1183 | do just that in a portbale fashion, supporting inotify on GNU/Linux and |
|
|
1184 | some weird, without doubt broken, stuff on OS X to monitor files. It can |
|
|
1185 | fall back to blocking scans at regular intervals transparently on other |
|
|
1186 | platforms, so it's about as portable as it gets. |
|
|
1187 | |
|
|
1188 | (I haven't used it myself, but I haven't heard anybody complaining about |
|
|
1189 | it yet). |
|
|
1190 | |
|
|
1191 | =item L<AnyEvent::DBI> |
|
|
1192 | |
|
|
1193 | Executes L<DBI> requests asynchronously in a proxy process for you, |
|
|
1194 | notifying you in an event-based way when the operation is finished. |
|
|
1195 | |
1181 | =item L<AnyEvent::HTTPD> |
1196 | =item L<AnyEvent::HTTPD> |
1182 | |
1197 | |
1183 | A simple embedded webserver. |
1198 | A simple embedded webserver. |
1184 | |
1199 | |
1185 | =item L<AnyEvent::FastPing> |
1200 | =item L<AnyEvent::FastPing> |
1186 | |
1201 | |
1187 | The fastest ping in the west. |
1202 | The fastest ping in the west. |
1188 | |
1203 | |
1189 | =item L<Coro> |
1204 | =item L<Coro> |
1190 | |
1205 | |
1191 | Has special support for AnyEvent via L<Coro::AnyEvent>. |
1206 | Has special support for AnyEvent via L<Coro::AnyEvent>, which allows you |
|
|
1207 | to simply invert the flow control - don't call us, we will call you: |
|
|
1208 | |
|
|
1209 | async { |
|
|
1210 | Coro::AnyEvent::sleep 5; # creates a 5s timer and waits for it |
|
|
1211 | print "5 seconds later!\n"; |
|
|
1212 | |
|
|
1213 | Coro::AnyEvent::readable *STDIN; # uses an I/O watcher |
|
|
1214 | my $line = <STDIN>; # works for ttys |
|
|
1215 | |
|
|
1216 | AnyEvent::HTTP::http_get "url", Coro::rouse_cb; |
|
|
1217 | my ($body, $hdr) = Coro::rouse_wait; |
|
|
1218 | }; |
1192 | |
1219 | |
1193 | =back |
1220 | =back |
1194 | |
1221 | |
1195 | =cut |
1222 | =cut |
1196 | |
1223 | |
… | |
… | |
1206 | |
1233 | |
1207 | BEGIN { AnyEvent::common_sense } |
1234 | BEGIN { AnyEvent::common_sense } |
1208 | |
1235 | |
1209 | use Carp (); |
1236 | use Carp (); |
1210 | |
1237 | |
1211 | our $VERSION = '6.01'; |
1238 | our $VERSION = '6.02'; |
1212 | our $MODEL; |
1239 | our $MODEL; |
1213 | |
|
|
1214 | our @ISA; |
1240 | our @ISA; |
1215 | |
|
|
1216 | our @REGISTRY; |
1241 | our @REGISTRY; |
1217 | |
|
|
1218 | our $VERBOSE; |
1242 | our $VERBOSE; |
|
|
1243 | our %PROTOCOL; # (ipv4|ipv6) => (1|2), higher numbers are preferred |
|
|
1244 | our $MAX_SIGNAL_LATENCY = $ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY} || 10; # executes after the BEGIN block below (tainting!) |
1219 | |
1245 | |
1220 | BEGIN { |
1246 | BEGIN { |
1221 | require "AnyEvent/constants.pl"; |
1247 | require "AnyEvent/constants.pl"; |
1222 | |
1248 | |
1223 | eval "sub TAINT (){" . (${^TAINT}*1) . "}"; |
1249 | eval "sub TAINT (){" . (${^TAINT}*1) . "}"; |
1224 | |
1250 | |
1225 | delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV} |
1251 | delete @ENV{grep /^PERL_ANYEVENT_/, keys %ENV} |
1226 | if ${^TAINT}; |
1252 | if ${^TAINT}; |
1227 | |
1253 | |
1228 | $VERBOSE = $ENV{PERL_ANYEVENT_VERBOSE}*1; |
1254 | $ENV{"PERL_ANYEVENT_$_"} = $ENV{"AE_$_"} |
|
|
1255 | for grep s/^AE_// && !exists $ENV{"PERL_ANYEVENT_$_"}, keys %ENV; |
1229 | |
1256 | |
1230 | } |
1257 | @ENV{grep /^PERL_ANYEVENT_/, keys %ENV} = () |
|
|
1258 | if ${^TAINT}; |
1231 | |
1259 | |
1232 | our $MAX_SIGNAL_LATENCY = 10; |
1260 | # $ENV{PERL_ANYEVENT_xxx} now valid |
1233 | |
1261 | |
1234 | our %PROTOCOL; # (ipv4|ipv6) => (1|2), higher numbers are preferred |
1262 | $VERBOSE = length $ENV{PERL_ANYEVENT_VERBOSE} ? $ENV{PERL_ANYEVENT_VERBOSE}*1 : 4; |
1235 | |
1263 | |
1236 | { |
|
|
1237 | my $idx; |
1264 | my $idx; |
1238 | $PROTOCOL{$_} = ++$idx |
1265 | $PROTOCOL{$_} = ++$idx |
1239 | for reverse split /\s*,\s*/, |
1266 | for reverse split /\s*,\s*/, |
1240 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1267 | $ENV{PERL_ANYEVENT_PROTOCOLS} || "ipv4,ipv6"; |
1241 | } |
1268 | } |
… | |
… | |
1272 | $POSTPONE_W ||= AE::timer (0, 0, \&_postpone_exec); |
1299 | $POSTPONE_W ||= AE::timer (0, 0, \&_postpone_exec); |
1273 | |
1300 | |
1274 | () |
1301 | () |
1275 | } |
1302 | } |
1276 | |
1303 | |
|
|
1304 | sub log($$;@) { |
|
|
1305 | # only load the big bloated module when we actually are about to log something |
|
|
1306 | if ($_[0] <= ($VERBOSE || 1)) { # also catches non-numeric levels(!) and fatal |
|
|
1307 | require AnyEvent::Log; # among other things, sets $VERBOSE to 9 |
|
|
1308 | # AnyEvent::Log overwrites this function |
|
|
1309 | goto &log; |
|
|
1310 | } |
|
|
1311 | |
|
|
1312 | 0 # not logged |
|
|
1313 | } |
|
|
1314 | |
|
|
1315 | sub logger($;$) { |
|
|
1316 | package AnyEvent::Log; |
|
|
1317 | |
|
|
1318 | my ($level, $renabled) = @_; |
|
|
1319 | |
|
|
1320 | $$renabled = $level <= $VERBOSE; |
|
|
1321 | |
|
|
1322 | my $pkg = (caller)[0]; |
|
|
1323 | |
|
|
1324 | my $logger = [$pkg, $level, $renabled]; |
|
|
1325 | |
|
|
1326 | our %LOGGER; |
|
|
1327 | $LOGGER{$logger+0} = $logger; |
|
|
1328 | |
|
|
1329 | require AnyEvent::Util; |
|
|
1330 | my $guard = AnyEvent::Util::guard (sub { |
|
|
1331 | # "clean up" |
|
|
1332 | delete $LOGGER{$logger+0}; |
|
|
1333 | }); |
|
|
1334 | |
|
|
1335 | sub { |
|
|
1336 | return 0 unless $$renabled; |
|
|
1337 | |
|
|
1338 | $guard if 0; # keep guard alive, but don't cause runtime overhead |
|
|
1339 | require AnyEvent::Log unless $AnyEvent::Log::VERSION; |
|
|
1340 | package AnyEvent::Log; |
|
|
1341 | _log ($logger->[0], $level, @_) # logger->[0] has been converted at load time |
|
|
1342 | } |
|
|
1343 | } |
|
|
1344 | |
|
|
1345 | if (length $ENV{PERL_ANYEVENT_LOG}) { |
|
|
1346 | require AnyEvent::Log; # AnyEvent::Log does the thing for us |
|
|
1347 | } |
|
|
1348 | |
1277 | our @models = ( |
1349 | our @models = ( |
1278 | [EV:: => AnyEvent::Impl::EV:: , 1], |
1350 | [EV:: => AnyEvent::Impl::EV::], |
1279 | [AnyEvent::Loop:: => AnyEvent::Impl::Perl:: , 1], |
1351 | [AnyEvent::Loop:: => AnyEvent::Impl::Perl::], |
1280 | # everything below here will not (normally) be autoprobed |
1352 | # everything below here will not (normally) be autoprobed |
1281 | # as the pure perl backend should work everywhere |
1353 | # as the pure perl backend should work everywhere |
1282 | # and is usually faster |
1354 | # and is usually faster |
|
|
1355 | [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package, so msut be near the top |
1283 | [Event:: => AnyEvent::Impl::Event::, 1], |
1356 | [Event:: => AnyEvent::Impl::Event::], # slow, stable |
1284 | [Glib:: => AnyEvent::Impl::Glib:: , 1], # becomes extremely slow with many watchers |
1357 | [Glib:: => AnyEvent::Impl::Glib::], # becomes extremely slow with many watchers |
|
|
1358 | # everything below here should not be autoloaded |
1285 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
1359 | [Event::Lib:: => AnyEvent::Impl::EventLib::], # too buggy |
1286 | [Irssi:: => AnyEvent::Impl::Irssi::], # Irssi has a bogus "Event" package |
|
|
1287 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1360 | [Tk:: => AnyEvent::Impl::Tk::], # crashes with many handles |
1288 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1361 | [Qt:: => AnyEvent::Impl::Qt::], # requires special main program |
1289 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
1362 | [POE::Kernel:: => AnyEvent::Impl::POE::], # lasciate ogni speranza |
1290 | [Wx:: => AnyEvent::Impl::POE::], |
1363 | [Wx:: => AnyEvent::Impl::POE::], |
1291 | [Prima:: => AnyEvent::Impl::POE::], |
1364 | [Prima:: => AnyEvent::Impl::POE::], |
1292 | [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect |
1365 | [IO::Async::Loop:: => AnyEvent::Impl::IOAsync::], # a bitch to autodetect |
1293 | [Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::], |
1366 | [Cocoa::EventLoop:: => AnyEvent::Impl::Cocoa::], |
1294 | [FLTK:: => AnyEvent::Impl::FLTK2::], |
1367 | [FLTK:: => AnyEvent::Impl::FLTK::], |
1295 | ); |
1368 | ); |
1296 | |
1369 | |
1297 | our @isa_hook; |
1370 | our @isa_hook; |
1298 | |
1371 | |
1299 | sub _isa_set { |
1372 | sub _isa_set { |
… | |
… | |
1318 | # all autoloaded methods reserve the complete glob, not just the method slot. |
1391 | # all autoloaded methods reserve the complete glob, not just the method slot. |
1319 | # due to bugs in perls method cache implementation. |
1392 | # due to bugs in perls method cache implementation. |
1320 | our @methods = qw(io timer time now now_update signal child idle condvar); |
1393 | our @methods = qw(io timer time now now_update signal child idle condvar); |
1321 | |
1394 | |
1322 | sub detect() { |
1395 | sub detect() { |
|
|
1396 | return $MODEL if $MODEL; # some programs keep references to detect |
|
|
1397 | |
|
|
1398 | # IO::Async::Loop::AnyEvent is extremely evil, refuse to work with it |
|
|
1399 | # the author knows about the problems and what it does to AnyEvent as a whole |
|
|
1400 | # (and the ability of others to use AnyEvent), but simply wants to abuse AnyEvent |
|
|
1401 | # anyway. |
|
|
1402 | AnyEvent::log fatal => "AnyEvent: IO::Async::Loop::AnyEvent detected - this module is broken by design,\n" |
|
|
1403 | . "abuses internals and breaks AnyEvent, will not continue." |
|
|
1404 | if exists $INC{"IO/Async/Loop/AnyEvent.pm"}; |
|
|
1405 | |
1323 | local $!; # for good measure |
1406 | local $!; # for good measure |
1324 | local $SIG{__DIE__}; # we use eval |
1407 | local $SIG{__DIE__}; # we use eval |
1325 | |
1408 | |
1326 | # free some memory |
1409 | # free some memory |
1327 | *detect = sub () { $MODEL }; |
1410 | *detect = sub () { $MODEL }; |
… | |
… | |
1335 | |
1418 | |
1336 | if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) { |
1419 | if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) { |
1337 | my $model = $1; |
1420 | my $model = $1; |
1338 | $model = "AnyEvent::Impl::$model" unless $model =~ s/::$//; |
1421 | $model = "AnyEvent::Impl::$model" unless $model =~ s/::$//; |
1339 | if (eval "require $model") { |
1422 | if (eval "require $model") { |
|
|
1423 | AnyEvent::log 7 => "loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it."; |
1340 | $MODEL = $model; |
1424 | $MODEL = $model; |
1341 | warn "AnyEvent: loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.\n" if $VERBOSE >= 2; |
|
|
1342 | } else { |
1425 | } else { |
1343 | warn "AnyEvent: unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@" if $VERBOSE; |
1426 | AnyEvent::log 4 => "unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@"; |
1344 | } |
1427 | } |
1345 | } |
1428 | } |
1346 | |
1429 | |
1347 | # check for already loaded models |
1430 | # check for already loaded models |
1348 | unless ($MODEL) { |
1431 | unless ($MODEL) { |
1349 | for (@REGISTRY, @models) { |
1432 | for (@REGISTRY, @models) { |
1350 | my ($package, $model) = @$_; |
1433 | my ($package, $model) = @$_; |
1351 | if (${"$package\::VERSION"} > 0) { |
1434 | if (${"$package\::VERSION"} > 0) { |
1352 | if (eval "require $model") { |
1435 | if (eval "require $model") { |
|
|
1436 | AnyEvent::log 7 => "autodetected model '$model', using it."; |
1353 | $MODEL = $model; |
1437 | $MODEL = $model; |
1354 | warn "AnyEvent: autodetected model '$model', using it.\n" if $VERBOSE >= 2; |
|
|
1355 | last; |
1438 | last; |
1356 | } |
1439 | } |
1357 | } |
1440 | } |
1358 | } |
1441 | } |
1359 | |
1442 | |
1360 | unless ($MODEL) { |
1443 | unless ($MODEL) { |
1361 | # try to autoload a model |
1444 | # try to autoload a model |
1362 | for (@REGISTRY, @models) { |
1445 | for (@REGISTRY, @models) { |
1363 | my ($package, $model, $autoload) = @$_; |
1446 | my ($package, $model) = @$_; |
1364 | if ( |
1447 | if ( |
1365 | $autoload |
|
|
1366 | and eval "require $package" |
1448 | eval "require $package" |
1367 | and ${"$package\::VERSION"} > 0 |
1449 | and ${"$package\::VERSION"} > 0 |
1368 | and eval "require $model" |
1450 | and eval "require $model" |
1369 | ) { |
1451 | ) { |
|
|
1452 | AnyEvent::log 7 => "autoloaded model '$model', using it."; |
1370 | $MODEL = $model; |
1453 | $MODEL = $model; |
1371 | warn "AnyEvent: autoloaded model '$model', using it.\n" if $VERBOSE >= 2; |
|
|
1372 | last; |
1454 | last; |
1373 | } |
1455 | } |
1374 | } |
1456 | } |
1375 | |
1457 | |
1376 | $MODEL |
1458 | $MODEL |
1377 | or die "AnyEvent: backend autodetection failed - did you properly install AnyEvent?\n"; |
1459 | or AnyEvent::log fatal => "AnyEvent: backend autodetection failed - did you properly install AnyEvent?"; |
1378 | } |
1460 | } |
1379 | } |
1461 | } |
1380 | |
1462 | |
1381 | # free memory only needed for probing |
1463 | # free memory only needed for probing |
1382 | undef @models; |
1464 | undef @models; |
… | |
… | |
1391 | if defined &{"$MODEL\::$_"}; |
1473 | if defined &{"$MODEL\::$_"}; |
1392 | } |
1474 | } |
1393 | |
1475 | |
1394 | _isa_set; |
1476 | _isa_set; |
1395 | |
1477 | |
|
|
1478 | # we're officially open! |
|
|
1479 | |
1396 | if ($ENV{PERL_ANYEVENT_STRICT}) { |
1480 | if ($ENV{PERL_ANYEVENT_STRICT}) { |
1397 | require AnyEvent::Strict; |
1481 | require AnyEvent::Strict; |
1398 | } |
1482 | } |
1399 | |
1483 | |
1400 | if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) { |
1484 | if ($ENV{PERL_ANYEVENT_DEBUG_WRAP}) { |
1401 | require AnyEvent::Debug; |
1485 | require AnyEvent::Debug; |
1402 | AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP}); |
1486 | AnyEvent::Debug::wrap ($ENV{PERL_ANYEVENT_DEBUG_WRAP}); |
1403 | } |
1487 | } |
1404 | |
1488 | |
1405 | if (exists $ENV{PERL_ANYEVENT_DEBUG_SHELL}) { |
1489 | if (length $ENV{PERL_ANYEVENT_DEBUG_SHELL}) { |
1406 | require AnyEvent::Socket; |
1490 | require AnyEvent::Socket; |
1407 | require AnyEvent::Debug; |
1491 | require AnyEvent::Debug; |
1408 | |
1492 | |
1409 | my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL}; |
1493 | my $shell = $ENV{PERL_ANYEVENT_DEBUG_SHELL}; |
1410 | $shell =~ s/\$\$/$$/g; |
1494 | $shell =~ s/\$\$/$$/g; |
1411 | |
1495 | |
1412 | my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell); |
1496 | my ($host, $service) = AnyEvent::Socket::parse_hostport ($shell); |
1413 | $AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service); |
1497 | $AnyEvent::Debug::SHELL = AnyEvent::Debug::shell ($host, $service); |
1414 | } |
1498 | } |
|
|
1499 | |
|
|
1500 | # now the anyevent environment is set up as the user told us to, so |
|
|
1501 | # call the actual user code - post detects |
1415 | |
1502 | |
1416 | (shift @post_detect)->() while @post_detect; |
1503 | (shift @post_detect)->() while @post_detect; |
1417 | undef @post_detect; |
1504 | undef @post_detect; |
1418 | |
1505 | |
1419 | *post_detect = sub(&) { |
1506 | *post_detect = sub(&) { |
… | |
… | |
1506 | sub time() { |
1593 | sub time() { |
1507 | AnyEvent->time |
1594 | AnyEvent->time |
1508 | } |
1595 | } |
1509 | |
1596 | |
1510 | *postpone = \&AnyEvent::postpone; |
1597 | *postpone = \&AnyEvent::postpone; |
|
|
1598 | *log = \&AnyEvent::log; |
1511 | }; |
1599 | }; |
1512 | die if $@; |
1600 | die if $@; |
1513 | } |
1601 | } |
1514 | |
1602 | |
1515 | BEGIN { _reset } |
1603 | BEGIN { _reset } |
… | |
… | |
1520 | |
1608 | |
1521 | sub time { |
1609 | sub time { |
1522 | eval q{ # poor man's autoloading {} |
1610 | eval q{ # poor man's autoloading {} |
1523 | # probe for availability of Time::HiRes |
1611 | # probe for availability of Time::HiRes |
1524 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1612 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1525 | warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8; |
|
|
1526 | *time = sub { Time::HiRes::time () }; |
1613 | *time = sub { Time::HiRes::time () }; |
1527 | *AE::time = \& Time::HiRes::time ; |
1614 | *AE::time = \& Time::HiRes::time ; |
|
|
1615 | *now = \&time; |
|
|
1616 | AnyEvent::log 8 => "AnyEvent: using Time::HiRes for sub-second timing accuracy."; |
1528 | # if (eval "use POSIX (); (POSIX::times())... |
1617 | # if (eval "use POSIX (); (POSIX::times())... |
1529 | } else { |
1618 | } else { |
1530 | warn "AnyEvent: using built-in time(), WARNING, no sub-second resolution!\n" if $VERBOSE; |
|
|
1531 | *time = sub { CORE::time }; |
1619 | *time = sub { CORE::time }; |
1532 | *AE::time = sub (){ CORE::time }; |
1620 | *AE::time = sub (){ CORE::time }; |
|
|
1621 | *now = \&time; |
|
|
1622 | AnyEvent::log 3 => "using built-in time(), WARNING, no sub-second resolution!"; |
1533 | } |
1623 | } |
1534 | |
|
|
1535 | *now = \&time; |
|
|
1536 | }; |
1624 | }; |
1537 | die if $@; |
1625 | die if $@; |
1538 | |
1626 | |
1539 | &time |
1627 | &time |
1540 | } |
1628 | } |
… | |
… | |
1633 | |
1721 | |
1634 | sub signal { |
1722 | sub signal { |
1635 | eval q{ # poor man's autoloading {} |
1723 | eval q{ # poor man's autoloading {} |
1636 | # probe for availability of Async::Interrupt |
1724 | # probe for availability of Async::Interrupt |
1637 | if (_have_async_interrupt) { |
1725 | if (_have_async_interrupt) { |
1638 | warn "AnyEvent: using Async::Interrupt for race-free signal handling.\n" if $VERBOSE >= 8; |
1726 | AnyEvent::log 8 => "using Async::Interrupt for race-free signal handling."; |
1639 | |
1727 | |
1640 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
1728 | $SIGPIPE_R = new Async::Interrupt::EventPipe; |
1641 | $SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec; |
1729 | $SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec; |
1642 | |
1730 | |
1643 | } else { |
1731 | } else { |
1644 | warn "AnyEvent: using emulated perl signal handling with latency timer.\n" if $VERBOSE >= 8; |
1732 | AnyEvent::log 8 => "using emulated perl signal handling with latency timer."; |
1645 | |
1733 | |
1646 | if (AnyEvent::WIN32) { |
1734 | if (AnyEvent::WIN32) { |
1647 | require AnyEvent::Util; |
1735 | require AnyEvent::Util; |
1648 | |
1736 | |
1649 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
1737 | ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); |
… | |
… | |
1943 | $Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and |
2031 | $Event/EV::DIED->() >>, L<Glib> uses C<< install_exception_handler >> and |
1944 | so on. |
2032 | so on. |
1945 | |
2033 | |
1946 | =head1 ENVIRONMENT VARIABLES |
2034 | =head1 ENVIRONMENT VARIABLES |
1947 | |
2035 | |
1948 | The following environment variables are used by this module or its |
2036 | AnyEvent supports a number of environment variables that tune the |
1949 | submodules. |
2037 | runtime behaviour. They are usually evaluated when AnyEvent is |
|
|
2038 | loaded, initialised, or a submodule that uses them is loaded. Many of |
|
|
2039 | them also cause AnyEvent to load additional modules - for example, |
|
|
2040 | C<PERL_ANYEVENT_DEBUG_WRAP> causes the L<AnyEvent::Debug> module to be |
|
|
2041 | loaded. |
1950 | |
2042 | |
1951 | Note that AnyEvent will remove I<all> environment variables starting with |
2043 | All the environment variables documented here start with |
1952 | C<PERL_ANYEVENT_> from C<%ENV> when it is loaded while taint mode is |
2044 | C<PERL_ANYEVENT_>, which is what AnyEvent considers its own |
1953 | enabled. |
2045 | namespace. Other modules are encouraged (but by no means required) to use |
|
|
2046 | C<PERL_ANYEVENT_SUBMODULE> if they have registered the AnyEvent::Submodule |
|
|
2047 | namespace on CPAN, for any submodule. For example, L<AnyEvent::HTTP> could |
|
|
2048 | be expected to use C<PERL_ANYEVENT_HTTP_PROXY> (it should not access env |
|
|
2049 | variables starting with C<AE_>, see below). |
|
|
2050 | |
|
|
2051 | All variables can also be set via the C<AE_> prefix, that is, instead |
|
|
2052 | of setting C<PERL_ANYEVENT_VERBOSE> you can also set C<AE_VERBOSE>. In |
|
|
2053 | case there is a clash btween anyevent and another program that uses |
|
|
2054 | C<AE_something> you can set the corresponding C<PERL_ANYEVENT_something> |
|
|
2055 | variable to the empty string, as those variables take precedence. |
|
|
2056 | |
|
|
2057 | When AnyEvent is first loaded, it copies all C<AE_xxx> env variables |
|
|
2058 | to their C<PERL_ANYEVENT_xxx> counterpart unless that variable already |
|
|
2059 | exists. If taint mode is on, then AnyEvent will remove I<all> environment |
|
|
2060 | variables starting with C<PERL_ANYEVENT_> from C<%ENV> (or replace them |
|
|
2061 | with C<undef> or the empty string, if the corresaponding C<AE_> variable |
|
|
2062 | is set). |
|
|
2063 | |
|
|
2064 | The exact algorithm is currently: |
|
|
2065 | |
|
|
2066 | 1. if taint mode enabled, delete all PERL_ANYEVENT_xyz variables from %ENV |
|
|
2067 | 2. copy over AE_xyz to PERL_ANYEVENT_xyz unless the latter alraedy exists |
|
|
2068 | 3. if taint mode enabled, set all PERL_ANYEVENT_xyz variables to undef. |
|
|
2069 | |
|
|
2070 | This ensures that child processes will not see the C<AE_> variables. |
|
|
2071 | |
|
|
2072 | The following environment variables are currently known to AnyEvent: |
1954 | |
2073 | |
1955 | =over 4 |
2074 | =over 4 |
1956 | |
2075 | |
1957 | =item C<PERL_ANYEVENT_VERBOSE> |
2076 | =item C<PERL_ANYEVENT_VERBOSE> |
1958 | |
2077 | |
1959 | By default, AnyEvent will be completely silent except in fatal |
2078 | By default, AnyEvent will only log messages with loglevel C<3> |
1960 | conditions. You can set this environment variable to make AnyEvent more |
2079 | (C<critical>) or higher (see L<AnyEvent::Log>). You can set this |
|
|
2080 | environment variable to a numerical loglevel to make AnyEvent more (or |
1961 | talkative. |
2081 | less) talkative. |
1962 | |
2082 | |
|
|
2083 | If you want to do more than just set the global logging level |
|
|
2084 | you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more |
|
|
2085 | complex specifications. |
|
|
2086 | |
|
|
2087 | When set to C<0> (C<off>), then no messages whatsoever will be logged with |
|
|
2088 | the default logging settings. |
|
|
2089 | |
1963 | When set to C<1> or higher, causes AnyEvent to warn about unexpected |
2090 | When set to C<5> or higher (C<warn>), causes AnyEvent to warn about |
1964 | conditions, such as not being able to load the event model specified by |
2091 | unexpected conditions, such as not being able to load the event model |
1965 | C<PERL_ANYEVENT_MODEL>. |
2092 | specified by C<PERL_ANYEVENT_MODEL>, or a guard callback throwing an |
|
|
2093 | exception - this is the minimum recommended level. |
1966 | |
2094 | |
1967 | When set to C<2> or higher, cause AnyEvent to report to STDERR which event |
2095 | When set to C<7> or higher (info), cause AnyEvent to report which event model it |
1968 | model it chooses. |
2096 | chooses. |
1969 | |
2097 | |
1970 | When set to C<8> or higher, then AnyEvent will report extra information on |
2098 | When set to C<8> or higher (debug), then AnyEvent will report extra information on |
1971 | which optional modules it loads and how it implements certain features. |
2099 | which optional modules it loads and how it implements certain features. |
|
|
2100 | |
|
|
2101 | =item C<PERL_ANYEVENT_LOG> |
|
|
2102 | |
|
|
2103 | Accepts rather complex logging specifications. For example, you could log |
|
|
2104 | all C<debug> messages of some module to stderr, warnings and above to |
|
|
2105 | stderr, and errors and above to syslog, with: |
|
|
2106 | |
|
|
2107 | PERL_ANYEVENT_LOG=Some::Module=debug,+log:filter=warn,+%syslog:%syslog=error,syslog |
|
|
2108 | |
|
|
2109 | For the rather extensive details, see L<AnyEvent::Log>. |
|
|
2110 | |
|
|
2111 | This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded, |
|
|
2112 | so will take effect even before AnyEvent has initialised itself. |
|
|
2113 | |
|
|
2114 | Note that specifying this environment variable causes the L<AnyEvent::Log> |
|
|
2115 | module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only |
|
|
2116 | using the latter saves a few hundred kB of memory until the first message |
|
|
2117 | is being logged. |
1972 | |
2118 | |
1973 | =item C<PERL_ANYEVENT_STRICT> |
2119 | =item C<PERL_ANYEVENT_STRICT> |
1974 | |
2120 | |
1975 | AnyEvent does not do much argument checking by default, as thorough |
2121 | AnyEvent does not do much argument checking by default, as thorough |
1976 | argument checking is very costly. Setting this variable to a true value |
2122 | argument checking is very costly. Setting this variable to a true value |
… | |
… | |
1985 | C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs |
2131 | C<PERL_ANYEVENT_STRICT=1> in your environment while developing programs |
1986 | can be very useful, however. |
2132 | can be very useful, however. |
1987 | |
2133 | |
1988 | =item C<PERL_ANYEVENT_DEBUG_SHELL> |
2134 | =item C<PERL_ANYEVENT_DEBUG_SHELL> |
1989 | |
2135 | |
1990 | If this env variable is set, then its contents will be interpreted by |
2136 | If this env variable is nonempty, then its contents will be interpreted by |
1991 | C<AnyEvent::Socket::parse_hostport> (after replacing every occurance of |
2137 | C<AnyEvent::Socket::parse_hostport> and C<AnyEvent::Debug::shell> (after |
1992 | C<$$> by the process pid) and an C<AnyEvent::Debug::shell> is bound on |
2138 | replacing every occurance of C<$$> by the process pid). The shell object |
1993 | that port. The shell object is saved in C<$AnyEvent::Debug::SHELL>. |
2139 | is saved in C<$AnyEvent::Debug::SHELL>. |
1994 | |
2140 | |
1995 | This takes place when the first watcher is created. |
2141 | This happens when the first watcher is created. |
1996 | |
2142 | |
1997 | For example, to bind a debug shell on a unix domain socket in |
2143 | For example, to bind a debug shell on a unix domain socket in |
1998 | F<< /tmp/debug<pid>.sock >>, you could use this: |
2144 | F<< /tmp/debug<pid>.sock >>, you could use this: |
1999 | |
2145 | |
2000 | PERL_ANYEVENT_DEBUG_SHELL=unix/:/tmp/debug\$\$.sock perlprog |
2146 | PERL_ANYEVENT_DEBUG_SHELL=/tmp/debug\$\$.sock perlprog |
|
|
2147 | # connect with e.g.: socat readline /tmp/debug123.sock |
2001 | |
2148 | |
|
|
2149 | Or to bind to tcp port 4545 on localhost: |
|
|
2150 | |
|
|
2151 | PERL_ANYEVENT_DEBUG_SHELL=127.0.0.1:4545 perlprog |
|
|
2152 | # connect with e.g.: telnet localhost 4545 |
|
|
2153 | |
2002 | Note that creating sockets in F</tmp> is very unsafe on multiuser |
2154 | Note that creating sockets in F</tmp> or on localhost is very unsafe on |
2003 | systems. |
2155 | multiuser systems. |
2004 | |
2156 | |
2005 | =item C<PERL_ANYEVENT_DEBUG_WRAP> |
2157 | =item C<PERL_ANYEVENT_DEBUG_WRAP> |
2006 | |
2158 | |
2007 | Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for |
2159 | Can be set to C<0>, C<1> or C<2> and enables wrapping of all watchers for |
2008 | debugging purposes. See C<AnyEvent::Debug::wrap> for details. |
2160 | debugging purposes. See C<AnyEvent::Debug::wrap> for details. |
… | |
… | |
2046 | but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4> |
2198 | but support both and try to use both. C<PERL_ANYEVENT_PROTOCOLS=ipv4> |
2047 | - only support IPv4, never try to resolve or contact IPv6 |
2199 | - only support IPv4, never try to resolve or contact IPv6 |
2048 | addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or |
2200 | addresses. C<PERL_ANYEVENT_PROTOCOLS=ipv6,ipv4> support either IPv4 or |
2049 | IPv6, but prefer IPv6 over IPv4. |
2201 | IPv6, but prefer IPv6 over IPv4. |
2050 | |
2202 | |
|
|
2203 | =item C<PERL_ANYEVENT_HOSTS> |
|
|
2204 | |
|
|
2205 | This variable, if specified, overrides the F</etc/hosts> file used by |
|
|
2206 | L<AnyEvent::Socket>C<::resolve_sockaddr>, i.e. hosts aliases will be read |
|
|
2207 | from that file instead. |
|
|
2208 | |
2051 | =item C<PERL_ANYEVENT_EDNS0> |
2209 | =item C<PERL_ANYEVENT_EDNS0> |
2052 | |
2210 | |
2053 | Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension |
2211 | Used by L<AnyEvent::DNS> to decide whether to use the EDNS0 extension for |
2054 | for DNS. This extension is generally useful to reduce DNS traffic, but |
2212 | DNS. This extension is generally useful to reduce DNS traffic, especially |
2055 | some (broken) firewalls drop such DNS packets, which is why it is off by |
2213 | when DNSSEC is involved, but some (broken) firewalls drop such DNS |
2056 | default. |
2214 | packets, which is why it is off by default. |
2057 | |
2215 | |
2058 | Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce |
2216 | Setting this variable to C<1> will cause L<AnyEvent::DNS> to announce |
2059 | EDNS0 in its DNS requests. |
2217 | EDNS0 in its DNS requests. |
2060 | |
2218 | |
2061 | =item C<PERL_ANYEVENT_MAX_FORKS> |
2219 | =item C<PERL_ANYEVENT_MAX_FORKS> |
… | |
… | |
2067 | |
2225 | |
2068 | The default value for the C<max_outstanding> parameter for the default DNS |
2226 | The default value for the C<max_outstanding> parameter for the default DNS |
2069 | resolver - this is the maximum number of parallel DNS requests that are |
2227 | resolver - this is the maximum number of parallel DNS requests that are |
2070 | sent to the DNS server. |
2228 | sent to the DNS server. |
2071 | |
2229 | |
|
|
2230 | =item C<PERL_ANYEVENT_MAX_SIGNAL_LATENCY> |
|
|
2231 | |
|
|
2232 | Perl has inherently racy signal handling (you can basically choose between |
|
|
2233 | losing signals and memory corruption) - pure perl event loops (including |
|
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2234 | C<AnyEvent::Loop>, when C<Async::Interrupt> isn't available) therefore |
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2235 | have to poll regularly to avoid losing signals. |
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2236 | |
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2237 | Some event loops are racy, but don't poll regularly, and some event loops |
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2238 | are written in C but are still racy. For those event loops, AnyEvent |
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2239 | installs a timer that regularly wakes up the event loop. |
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2240 | |
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2241 | By default, the interval for this timer is C<10> seconds, but you can |
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2242 | override this delay with this environment variable (or by setting |
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2243 | the C<$AnyEvent::MAX_SIGNAL_LATENCY> variable before creating signal |
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2244 | watchers). |
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2245 | |
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2246 | Lower values increase CPU (and energy) usage, higher values can introduce |
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2247 | long delays when reaping children or waiting for signals. |
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2248 | |
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2249 | The L<AnyEvent::Async> module, if available, will be used to avoid this |
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2250 | polling (with most event loops). |
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2251 | |
2072 | =item C<PERL_ANYEVENT_RESOLV_CONF> |
2252 | =item C<PERL_ANYEVENT_RESOLV_CONF> |
2073 | |
2253 | |
2074 | The file to use instead of F</etc/resolv.conf> (or OS-specific |
2254 | The absolute path to a F<resolv.conf>-style file to use instead of |
2075 | configuration) in the default resolver. When set to the empty string, no |
2255 | F</etc/resolv.conf> (or the OS-specific configuration) in the default |
2076 | default config will be used. |
2256 | resolver, or the empty string to select the default configuration. |
2077 | |
2257 | |
2078 | =item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>. |
2258 | =item C<PERL_ANYEVENT_CA_FILE>, C<PERL_ANYEVENT_CA_PATH>. |
2079 | |
2259 | |
2080 | When neither C<ca_file> nor C<ca_path> was specified during |
2260 | When neither C<ca_file> nor C<ca_path> was specified during |
2081 | L<AnyEvent::TLS> context creation, and either of these environment |
2261 | L<AnyEvent::TLS> context creation, and either of these environment |
2082 | variables exist, they will be used to specify CA certificate locations |
2262 | variables are nonempty, they will be used to specify CA certificate |
2083 | instead of a system-dependent default. |
2263 | locations instead of a system-dependent default. |
2084 | |
2264 | |
2085 | =item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT> |
2265 | =item C<PERL_ANYEVENT_AVOID_GUARD> and C<PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT> |
2086 | |
2266 | |
2087 | When these are set to C<1>, then the respective modules are not |
2267 | When these are set to C<1>, then the respective modules are not |
2088 | loaded. Mostly good for testing AnyEvent itself. |
2268 | loaded. Mostly good for testing AnyEvent itself. |
… | |
… | |
2805 | |
2985 | |
2806 | Tutorial/Introduction: L<AnyEvent::Intro>. |
2986 | Tutorial/Introduction: L<AnyEvent::Intro>. |
2807 | |
2987 | |
2808 | FAQ: L<AnyEvent::FAQ>. |
2988 | FAQ: L<AnyEvent::FAQ>. |
2809 | |
2989 | |
2810 | Utility functions: L<AnyEvent::Util>. |
2990 | Utility functions: L<AnyEvent::Util> (misc. grab-bag), L<AnyEvent::Log> |
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2991 | (simply logging). |
2811 | |
2992 | |
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2993 | Development/Debugging: L<AnyEvent::Strict> (stricter checking), |
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2994 | L<AnyEvent::Debug> (interactive shell, watcher tracing). |
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2995 | |
2812 | Event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>, L<Glib::EV>, |
2996 | Supported event modules: L<AnyEvent::Loop>, L<EV>, L<EV::Glib>, |
2813 | L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>, L<Qt>, L<POE>. |
2997 | L<Glib::EV>, L<Event>, L<Glib::Event>, L<Glib>, L<Tk>, L<Event::Lib>, |
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2998 | L<Qt>, L<POE>, L<FLTK>. |
2814 | |
2999 | |
2815 | Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, |
3000 | Implementations: L<AnyEvent::Impl::EV>, L<AnyEvent::Impl::Event>, |
2816 | L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, |
3001 | L<AnyEvent::Impl::Glib>, L<AnyEvent::Impl::Tk>, L<AnyEvent::Impl::Perl>, |
2817 | L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, |
3002 | L<AnyEvent::Impl::EventLib>, L<AnyEvent::Impl::Qt>, |
2818 | L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>. |
3003 | L<AnyEvent::Impl::POE>, L<AnyEvent::Impl::IOAsync>, L<Anyevent::Impl::Irssi>, |
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3004 | L<AnyEvent::Impl::FLTK>. |
2819 | |
3005 | |
2820 | Non-blocking file handles, sockets, TCP clients and |
3006 | Non-blocking handles, pipes, stream sockets, TCP clients and |
2821 | servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. |
3007 | servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. |
2822 | |
3008 | |
2823 | Asynchronous DNS: L<AnyEvent::DNS>. |
3009 | Asynchronous DNS: L<AnyEvent::DNS>. |
2824 | |
3010 | |
2825 | Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>. |
3011 | Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>. |