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Comparing AnyEvent/lib/AnyEvent.pm (file contents):
Revision 1.392 by root, Tue Nov 22 09:36:46 2011 UTC vs.
Revision 1.401 by root, Thu Apr 5 04:12:21 2012 UTC

433as you cannot do race-free signal handling in perl, requiring 433as you cannot do race-free signal handling in perl, requiring
434C libraries for this. AnyEvent will try to do its best, which 434C libraries for this. AnyEvent will try to do its best, which
435means in some cases, signals will be delayed. The maximum time 435means in some cases, signals will be delayed. The maximum time
436a signal might be delayed is 10 seconds by default, but can 436a signal might be delayed is 10 seconds by default, but can
437be overriden via C<$ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY}> or 437be overriden via C<$ENV{PERL_ANYEVENT_MAX_SIGNAL_LATENCY}> or
438C<$AnyEvent::MAX_SIGNAL_LATENCY> - see the Ö<ENVIRONMENT VARIABLES> 438C<$AnyEvent::MAX_SIGNAL_LATENCY> - see the L<ENVIRONMENT VARIABLES>
439section for details. 439section for details.
440 440
441All these problems can be avoided by installing the optional 441All these problems can be avoided by installing the optional
442L<Async::Interrupt> module, which works with most event loops. It will not 442L<Async::Interrupt> module, which works with most event loops. It will not
443work with inherently broken event loops such as L<Event> or L<Event::Lib> 443work with inherently broken event loops such as L<Event> or L<Event::Lib>
1223 1223
1224package AnyEvent; 1224package AnyEvent;
1225 1225
1226# basically a tuned-down version of common::sense 1226# basically a tuned-down version of common::sense
1227sub common_sense { 1227sub common_sense {
1228 # from common:.sense 3.4 1228 # from common:.sense 3.5
1229 local $^W;
1229 ${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf0\x0f\xc0\xf0\xfc\x33\x00"; 1230 ${^WARNING_BITS} ^= ${^WARNING_BITS} ^ "\x3c\x3f\x33\x00\x0f\xf0\x0f\xc0\xf0\xfc\x33\x00";
1230 # use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl) 1231 # use strict vars subs - NO UTF-8, as Util.pm doesn't like this atm. (uts46data.pl)
1231 $^H |= 0x00000600; 1232 $^H |= 0x00000600;
1232} 1233}
1233 1234
1234BEGIN { AnyEvent::common_sense } 1235BEGIN { AnyEvent::common_sense }
1235 1236
1236use Carp (); 1237use Carp ();
1237 1238
1238our $VERSION = '6.11'; 1239our $VERSION = '6.14';
1239our $MODEL; 1240our $MODEL;
1240our @ISA; 1241our @ISA;
1241our @REGISTRY; 1242our @REGISTRY;
1242our $VERBOSE; 1243our $VERBOSE;
1243our %PROTOCOL; # (ipv4|ipv6) => (1|2), higher numbers are preferred 1244our %PROTOCOL; # (ipv4|ipv6) => (1|2), higher numbers are preferred
1395 1396
1396 # IO::Async::Loop::AnyEvent is extremely evil, refuse to work with it 1397 # IO::Async::Loop::AnyEvent is extremely evil, refuse to work with it
1397 # the author knows about the problems and what it does to AnyEvent as a whole 1398 # the author knows about the problems and what it does to AnyEvent as a whole
1398 # (and the ability of others to use AnyEvent), but simply wants to abuse AnyEvent 1399 # (and the ability of others to use AnyEvent), but simply wants to abuse AnyEvent
1399 # anyway. 1400 # anyway.
1400 AnyEvent::log fatal => "AnyEvent: IO::Async::Loop::AnyEvent detected - that module is broken by\n" 1401 AnyEvent::log fatal => "IO::Async::Loop::AnyEvent detected - that module is broken by\n"
1401 . "design, abuses internals and breaks AnyEvent - will not continue." 1402 . "design, abuses internals and breaks AnyEvent - will not continue."
1402 if exists $INC{"IO/Async/Loop/AnyEvent.pm"}; 1403 if exists $INC{"IO/Async/Loop/AnyEvent.pm"};
1403 1404
1404 local $!; # for good measure 1405 local $!; # for good measure
1405 local $SIG{__DIE__}; # we use eval 1406 local $SIG{__DIE__}; # we use eval
1416 1417
1417 if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) { 1418 if ($ENV{PERL_ANYEVENT_MODEL} =~ /^([a-zA-Z0-9:]+)$/) {
1418 my $model = $1; 1419 my $model = $1;
1419 $model = "AnyEvent::Impl::$model" unless $model =~ s/::$//; 1420 $model = "AnyEvent::Impl::$model" unless $model =~ s/::$//;
1420 if (eval "require $model") { 1421 if (eval "require $model") {
1421 AnyEvent::log 7 => "loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it."; 1422 AnyEvent::log 7 => "Loaded model '$model' (forced by \$ENV{PERL_ANYEVENT_MODEL}), using it.";
1422 $MODEL = $model; 1423 $MODEL = $model;
1423 } else { 1424 } else {
1424 AnyEvent::log 4 => "unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@"; 1425 AnyEvent::log 4 => "Unable to load model '$model' (from \$ENV{PERL_ANYEVENT_MODEL}):\n$@";
1425 } 1426 }
1426 } 1427 }
1427 1428
1428 # check for already loaded models 1429 # check for already loaded models
1429 unless ($MODEL) { 1430 unless ($MODEL) {
1430 for (@REGISTRY, @models) { 1431 for (@REGISTRY, @models) {
1431 my ($package, $model) = @$_; 1432 my ($package, $model) = @$_;
1432 if (${"$package\::VERSION"} > 0) { 1433 if (${"$package\::VERSION"} > 0) {
1433 if (eval "require $model") { 1434 if (eval "require $model") {
1434 AnyEvent::log 7 => "autodetected model '$model', using it."; 1435 AnyEvent::log 7 => "Autodetected model '$model', using it.";
1435 $MODEL = $model; 1436 $MODEL = $model;
1436 last; 1437 last;
1437 } else { 1438 } else {
1438 AnyEvent::log 8 => "detected event loop $package, but cannot load '$model', skipping: $@"; 1439 AnyEvent::log 8 => "Detected event loop $package, but cannot load '$model', skipping: $@";
1439 } 1440 }
1440 } 1441 }
1441 } 1442 }
1442 1443
1443 unless ($MODEL) { 1444 unless ($MODEL) {
1447 if ( 1448 if (
1448 eval "require $package" 1449 eval "require $package"
1449 and ${"$package\::VERSION"} > 0 1450 and ${"$package\::VERSION"} > 0
1450 and eval "require $model" 1451 and eval "require $model"
1451 ) { 1452 ) {
1452 AnyEvent::log 7 => "autoloaded model '$model', using it."; 1453 AnyEvent::log 7 => "Autoloaded model '$model', using it.";
1453 $MODEL = $model; 1454 $MODEL = $model;
1454 last; 1455 last;
1455 } 1456 }
1456 } 1457 }
1457 1458
1458 $MODEL 1459 $MODEL
1459 or AnyEvent::log fatal => "AnyEvent: backend autodetection failed - did you properly install AnyEvent?"; 1460 or AnyEvent::log fatal => "Backend autodetection failed - did you properly install AnyEvent?";
1460 } 1461 }
1461 } 1462 }
1462 1463
1463 # free memory only needed for probing 1464 # free memory only needed for probing
1464 undef @models; 1465 undef @models;
1611 # probe for availability of Time::HiRes 1612 # probe for availability of Time::HiRes
1612 if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { 1613 if (eval "use Time::HiRes (); Time::HiRes::time (); 1") {
1613 *time = sub { Time::HiRes::time () }; 1614 *time = sub { Time::HiRes::time () };
1614 *AE::time = \& Time::HiRes::time ; 1615 *AE::time = \& Time::HiRes::time ;
1615 *now = \&time; 1616 *now = \&time;
1616 AnyEvent::log 8 => "AnyEvent: using Time::HiRes for sub-second timing accuracy."; 1617 AnyEvent::log 8 => "using Time::HiRes for sub-second timing accuracy.";
1617 # if (eval "use POSIX (); (POSIX::times())... 1618 # if (eval "use POSIX (); (POSIX::times())...
1618 } else { 1619 } else {
1619 *time = sub { CORE::time }; 1620 *time = sub { CORE::time };
1620 *AE::time = sub (){ CORE::time }; 1621 *AE::time = sub (){ CORE::time };
1621 *now = \&time; 1622 *now = \&time;
1622 AnyEvent::log 3 => "using built-in time(), WARNING, no sub-second resolution!"; 1623 AnyEvent::log 3 => "Using built-in time(), no sub-second resolution!";
1623 } 1624 }
1624 }; 1625 };
1625 die if $@; 1626 die if $@;
1626 1627
1627 &time 1628 &time
1721 1722
1722sub signal { 1723sub signal {
1723 eval q{ # poor man's autoloading {} 1724 eval q{ # poor man's autoloading {}
1724 # probe for availability of Async::Interrupt 1725 # probe for availability of Async::Interrupt
1725 if (_have_async_interrupt) { 1726 if (_have_async_interrupt) {
1726 AnyEvent::log 8 => "using Async::Interrupt for race-free signal handling."; 1727 AnyEvent::log 8 => "Using Async::Interrupt for race-free signal handling.";
1727 1728
1728 $SIGPIPE_R = new Async::Interrupt::EventPipe; 1729 $SIGPIPE_R = new Async::Interrupt::EventPipe;
1729 $SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec; 1730 $SIG_IO = AE::io $SIGPIPE_R->fileno, 0, \&_signal_exec;
1730 1731
1731 } else { 1732 } else {
1732 AnyEvent::log 8 => "using emulated perl signal handling with latency timer."; 1733 AnyEvent::log 8 => "Using emulated perl signal handling with latency timer.";
1733 1734
1734 if (AnyEvent::WIN32) { 1735 if (AnyEvent::WIN32) {
1735 require AnyEvent::Util; 1736 require AnyEvent::Util;
1736 1737
1737 ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe (); 1738 ($SIGPIPE_R, $SIGPIPE_W) = AnyEvent::Util::portable_pipe ();
2073 2074
2074=over 4 2075=over 4
2075 2076
2076=item C<PERL_ANYEVENT_VERBOSE> 2077=item C<PERL_ANYEVENT_VERBOSE>
2077 2078
2078By default, AnyEvent will only log messages with loglevel C<3> 2079By default, AnyEvent will log messages with loglevel C<4> (C<error>) or
2079(C<critical>) or higher (see L<AnyEvent::Log>). You can set this 2080higher (see L<AnyEvent::Log>). You can set this environment variable to a
2080environment variable to a numerical loglevel to make AnyEvent more (or 2081numerical loglevel to make AnyEvent more (or less) talkative.
2081less) talkative.
2082 2082
2083If you want to do more than just set the global logging level 2083If you want to do more than just set the global logging level
2084you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more 2084you should have a look at C<PERL_ANYEVENT_LOG>, which allows much more
2085complex specifications. 2085complex specifications.
2086 2086
2087When set to C<0> (C<off>), then no messages whatsoever will be logged with 2087When set to C<0> (C<off>), then no messages whatsoever will be logged with
2088the default logging settings. 2088everything else at defaults.
2089 2089
2090When set to C<5> or higher (C<warn>), causes AnyEvent to warn about 2090When set to C<5> or higher (C<warn>), AnyEvent warns about unexpected
2091unexpected conditions, such as not being able to load the event model 2091conditions, such as not being able to load the event model specified by
2092specified by C<PERL_ANYEVENT_MODEL>, or a guard callback throwing an 2092C<PERL_ANYEVENT_MODEL>, or a guard callback throwing an exception - this
2093exception - this is the minimum recommended level. 2093is the minimum recommended level for use during development.
2094 2094
2095When set to C<7> or higher (info), cause AnyEvent to report which event model it 2095When set to C<7> or higher (info), AnyEvent reports which event model it
2096chooses. 2096chooses.
2097 2097
2098When set to C<8> or higher (debug), then AnyEvent will report extra information on 2098When set to C<8> or higher (debug), then AnyEvent will report extra
2099which optional modules it loads and how it implements certain features. 2099information on which optional modules it loads and how it implements
2100certain features.
2100 2101
2101=item C<PERL_ANYEVENT_LOG> 2102=item C<PERL_ANYEVENT_LOG>
2102 2103
2103Accepts rather complex logging specifications. For example, you could log 2104Accepts rather complex logging specifications. For example, you could log
2104all C<debug> messages of some module to stderr, warnings and above to 2105all C<debug> messages of some module to stderr, warnings and above to
2111This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded, 2112This variable is evaluated when AnyEvent (or L<AnyEvent::Log>) is loaded,
2112so will take effect even before AnyEvent has initialised itself. 2113so will take effect even before AnyEvent has initialised itself.
2113 2114
2114Note that specifying this environment variable causes the L<AnyEvent::Log> 2115Note that specifying this environment variable causes the L<AnyEvent::Log>
2115module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only 2116module to be loaded, while C<PERL_ANYEVENT_VERBOSE> does not, so only
2116using the latter saves a few hundred kB of memory until the first message 2117using the latter saves a few hundred kB of memory unless a module
2117is being logged. 2118explicitly needs the extra features of AnyEvent::Log.
2118 2119
2119=item C<PERL_ANYEVENT_STRICT> 2120=item C<PERL_ANYEVENT_STRICT>
2120 2121
2121AnyEvent does not do much argument checking by default, as thorough 2122AnyEvent does not do much argument checking by default, as thorough
2122argument checking is very costly. Setting this variable to a true value 2123argument checking is very costly. Setting this variable to a true value
2176 2177
2177For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you 2178For example, to force the pure perl model (L<AnyEvent::Loop::Perl>) you
2178could start your program like this: 2179could start your program like this:
2179 2180
2180 PERL_ANYEVENT_MODEL=Perl perl ... 2181 PERL_ANYEVENT_MODEL=Perl perl ...
2182
2183=item C<PERL_ANYEVENT_IO_MODEL>
2184
2185The current file I/O model - see L<AnyEvent::IO> for more info.
2186
2187At the moment, only C<Perl> (small, pure-perl, synchronous) and
2188C<IOAIO> (truly asynchronous) are supported. The default is C<IOAIO> if
2189L<AnyEvent::AIO> can be loaded, otherwise it is C<Perl>.
2181 2190
2182=item C<PERL_ANYEVENT_PROTOCOLS> 2191=item C<PERL_ANYEVENT_PROTOCOLS>
2183 2192
2184Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences 2193Used by both L<AnyEvent::DNS> and L<AnyEvent::Socket> to determine preferences
2185for IPv4 or IPv6. The default is unspecified (and might change, or be the result 2194for IPv4 or IPv6. The default is unspecified (and might change, or be the result
3004L<AnyEvent::Impl::FLTK>. 3013L<AnyEvent::Impl::FLTK>.
3005 3014
3006Non-blocking handles, pipes, stream sockets, TCP clients and 3015Non-blocking handles, pipes, stream sockets, TCP clients and
3007servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>. 3016servers: L<AnyEvent::Handle>, L<AnyEvent::Socket>, L<AnyEvent::TLS>.
3008 3017
3018Asynchronous File I/O: L<AnyEvent::IO>.
3019
3009Asynchronous DNS: L<AnyEvent::DNS>. 3020Asynchronous DNS: L<AnyEvent::DNS>.
3010 3021
3011Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>. 3022Thread support: L<Coro>, L<Coro::AnyEvent>, L<Coro::EV>, L<Coro::Event>.
3012 3023
3013Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::IRC>, 3024Nontrivial usage examples: L<AnyEvent::GPSD>, L<AnyEvent::IRC>,
3015 3026
3016 3027
3017=head1 AUTHOR 3028=head1 AUTHOR
3018 3029
3019 Marc Lehmann <schmorp@schmorp.de> 3030 Marc Lehmann <schmorp@schmorp.de>
3020 http://home.schmorp.de/ 3031 http://software.schmorp.de/pkg/AnyEvent.html
3021 3032
3022=cut 3033=cut
3023 3034
30241 30351
3025 3036

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