… | |
… | |
363 | might affect timers and time-outs. |
363 | might affect timers and time-outs. |
364 | |
364 | |
365 | When this is the case, you can call this method, which will update the |
365 | When this is the case, you can call this method, which will update the |
366 | event loop's idea of "current time". |
366 | event loop's idea of "current time". |
367 | |
367 | |
|
|
368 | A typical example would be a script in a web server (e.g. C<mod_perl>) - |
|
|
369 | when mod_perl executes the script, then the event loop will have the wrong |
|
|
370 | idea about the "current time" (being potentially far in the past, when the |
|
|
371 | script ran the last time). In that case you should arrange a call to C<< |
|
|
372 | AnyEvent->now_update >> each time the web server process wakes up again |
|
|
373 | (e.g. at the start of your script, or in a handler). |
|
|
374 | |
368 | Note that updating the time I<might> cause some events to be handled. |
375 | Note that updating the time I<might> cause some events to be handled. |
369 | |
376 | |
370 | =back |
377 | =back |
371 | |
378 | |
372 | =head2 SIGNAL WATCHERS |
379 | =head2 SIGNAL WATCHERS |
… | |
… | |
395 | correctly. |
402 | correctly. |
396 | |
403 | |
397 | Example: exit on SIGINT |
404 | Example: exit on SIGINT |
398 | |
405 | |
399 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
406 | my $w = AnyEvent->signal (signal => "INT", cb => sub { exit 1 }); |
|
|
407 | |
|
|
408 | =head3 Restart Behaviour |
|
|
409 | |
|
|
410 | While restart behaviour is up to the event loop implementation, most will |
|
|
411 | not restart syscalls (that includes L<Async::Interrupt> and AnyEvent's |
|
|
412 | pure perl implementation). |
|
|
413 | |
|
|
414 | =head3 Safe/Unsafe Signals |
|
|
415 | |
|
|
416 | Perl signals can be either "safe" (synchronous to opcode handling) or |
|
|
417 | "unsafe" (asynchronous) - the former might get delayed indefinitely, the |
|
|
418 | latter might corrupt your memory. |
|
|
419 | |
|
|
420 | AnyEvent signal handlers are, in addition, synchronous to the event loop, |
|
|
421 | i.e. they will not interrupt your running perl program but will only be |
|
|
422 | called as part of the normal event handling (just like timer, I/O etc. |
|
|
423 | callbacks, too). |
400 | |
424 | |
401 | =head3 Signal Races, Delays and Workarounds |
425 | =head3 Signal Races, Delays and Workarounds |
402 | |
426 | |
403 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
427 | Many event loops (e.g. Glib, Tk, Qt, IO::Async) do not support attaching |
404 | callbacks to signals in a generic way, which is a pity, as you cannot |
428 | callbacks to signals in a generic way, which is a pity, as you cannot |
… | |
… | |
1106 | |
1130 | |
1107 | package AnyEvent; |
1131 | package AnyEvent; |
1108 | |
1132 | |
1109 | # basically a tuned-down version of common::sense |
1133 | # basically a tuned-down version of common::sense |
1110 | sub common_sense { |
1134 | sub common_sense { |
1111 | # no warnings |
1135 | # from common:.sense 1.0 |
1112 | ${^WARNING_BITS} ^= ${^WARNING_BITS}; |
1136 | ${^WARNING_BITS} = "\xfc\x3f\xf3\x00\x0f\xf3\xcf\xc0\xf3\xfc\x33\x03"; |
1113 | # use strict vars subs |
1137 | # use strict vars subs |
1114 | $^H |= 0x00000600; |
1138 | $^H |= 0x00000600; |
1115 | } |
1139 | } |
1116 | |
1140 | |
1117 | BEGIN { AnyEvent::common_sense } |
1141 | BEGIN { AnyEvent::common_sense } |
1118 | |
1142 | |
1119 | use Carp (); |
1143 | use Carp (); |
1120 | |
1144 | |
1121 | our $VERSION = '5.112'; |
1145 | our $VERSION = '5.21'; |
1122 | our $MODEL; |
1146 | our $MODEL; |
1123 | |
1147 | |
1124 | our $AUTOLOAD; |
1148 | our $AUTOLOAD; |
1125 | our @ISA; |
1149 | our @ISA; |
1126 | |
1150 | |
1127 | our @REGISTRY; |
1151 | our @REGISTRY; |
1128 | |
|
|
1129 | our $WIN32; |
|
|
1130 | |
1152 | |
1131 | our $VERBOSE; |
1153 | our $VERBOSE; |
1132 | |
1154 | |
1133 | BEGIN { |
1155 | BEGIN { |
1134 | eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }"; |
1156 | eval "sub WIN32(){ " . (($^O =~ /mswin32/i)*1) ." }"; |
… | |
… | |
1343 | |
1365 | |
1344 | package AnyEvent::Base; |
1366 | package AnyEvent::Base; |
1345 | |
1367 | |
1346 | # default implementations for many methods |
1368 | # default implementations for many methods |
1347 | |
1369 | |
1348 | sub _time { |
1370 | sub _time() { |
1349 | # probe for availability of Time::HiRes |
1371 | # probe for availability of Time::HiRes |
1350 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1372 | if (eval "use Time::HiRes (); Time::HiRes::time (); 1") { |
1351 | warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8; |
1373 | warn "AnyEvent: using Time::HiRes for sub-second timing accuracy.\n" if $VERBOSE >= 8; |
1352 | *_time = \&Time::HiRes::time; |
1374 | *_time = \&Time::HiRes::time; |
1353 | # if (eval "use POSIX (); (POSIX::times())... |
1375 | # if (eval "use POSIX (); (POSIX::times())... |
… | |
… | |
1373 | |
1395 | |
1374 | our $HAVE_ASYNC_INTERRUPT; |
1396 | our $HAVE_ASYNC_INTERRUPT; |
1375 | |
1397 | |
1376 | sub _have_async_interrupt() { |
1398 | sub _have_async_interrupt() { |
1377 | $HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} |
1399 | $HAVE_ASYNC_INTERRUPT = 1*(!$ENV{PERL_ANYEVENT_AVOID_ASYNC_INTERRUPT} |
1378 | && eval "use Async::Interrupt 1.0 (); 1") |
1400 | && eval "use Async::Interrupt 1.02 (); 1") |
1379 | unless defined $HAVE_ASYNC_INTERRUPT; |
1401 | unless defined $HAVE_ASYNC_INTERRUPT; |
1380 | |
1402 | |
1381 | $HAVE_ASYNC_INTERRUPT |
1403 | $HAVE_ASYNC_INTERRUPT |
1382 | } |
1404 | } |
1383 | |
1405 | |
… | |
… | |
1386 | our ($SIG_COUNT, $SIG_TW); |
1408 | our ($SIG_COUNT, $SIG_TW); |
1387 | |
1409 | |
1388 | sub _signal_exec { |
1410 | sub _signal_exec { |
1389 | $HAVE_ASYNC_INTERRUPT |
1411 | $HAVE_ASYNC_INTERRUPT |
1390 | ? $SIGPIPE_R->drain |
1412 | ? $SIGPIPE_R->drain |
1391 | : sysread $SIGPIPE_R, my $dummy, 9; |
1413 | : sysread $SIGPIPE_R, (my $dummy), 9; |
1392 | |
1414 | |
1393 | while (%SIG_EV) { |
1415 | while (%SIG_EV) { |
1394 | for (keys %SIG_EV) { |
1416 | for (keys %SIG_EV) { |
1395 | delete $SIG_EV{$_}; |
1417 | delete $SIG_EV{$_}; |
1396 | $_->() for values %{ $SIG_CB{$_} || {} }; |
1418 | $_->() for values %{ $SIG_CB{$_} || {} }; |
… | |
… | |
1912 | warn "read: $input\n"; # output what has been read |
1934 | warn "read: $input\n"; # output what has been read |
1913 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1935 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1914 | }, |
1936 | }, |
1915 | ); |
1937 | ); |
1916 | |
1938 | |
1917 | my $time_watcher; # can only be used once |
|
|
1918 | |
|
|
1919 | sub new_timer { |
|
|
1920 | $timer = AnyEvent->timer (after => 1, cb => sub { |
1939 | my $time_watcher = AnyEvent->timer (after => 1, interval => 1, cb => sub { |
1921 | warn "timeout\n"; # print 'timeout' about every second |
1940 | warn "timeout\n"; # print 'timeout' at most every second |
1922 | &new_timer; # and restart the time |
|
|
1923 | }); |
1941 | }); |
1924 | } |
|
|
1925 | |
|
|
1926 | new_timer; # create first timer |
|
|
1927 | |
1942 | |
1928 | $cv->recv; # wait until user enters /^q/i |
1943 | $cv->recv; # wait until user enters /^q/i |
1929 | |
1944 | |
1930 | =head1 REAL-WORLD EXAMPLE |
1945 | =head1 REAL-WORLD EXAMPLE |
1931 | |
1946 | |
… | |
… | |
2375 | As you can see, the AnyEvent + EV combination even beats the |
2390 | As you can see, the AnyEvent + EV combination even beats the |
2376 | hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl |
2391 | hand-optimised "raw sockets benchmark", while AnyEvent + its pure perl |
2377 | backend easily beats IO::Lambda and POE. |
2392 | backend easily beats IO::Lambda and POE. |
2378 | |
2393 | |
2379 | And even the 100% non-blocking version written using the high-level (and |
2394 | And even the 100% non-blocking version written using the high-level (and |
2380 | slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda by a |
2395 | slow :) L<AnyEvent::Handle> abstraction beats both POE and IO::Lambda |
2381 | large margin, even though it does all of DNS, tcp-connect and socket I/O |
2396 | higher level ("unoptimised") abstractions by a large margin, even though |
2382 | in a non-blocking way. |
2397 | it does all of DNS, tcp-connect and socket I/O in a non-blocking way. |
2383 | |
2398 | |
2384 | The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and |
2399 | The two AnyEvent benchmarks programs can be found as F<eg/ae0.pl> and |
2385 | F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are |
2400 | F<eg/ae2.pl> in the AnyEvent distribution, the remaining benchmarks are |
2386 | part of the IO::lambda distribution and were used without any changes. |
2401 | part of the IO::Lambda distribution and were used without any changes. |
2387 | |
2402 | |
2388 | |
2403 | |
2389 | =head1 SIGNALS |
2404 | =head1 SIGNALS |
2390 | |
2405 | |
2391 | AnyEvent currently installs handlers for these signals: |
2406 | AnyEvent currently installs handlers for these signals: |
… | |
… | |
2434 | |
2449 | |
2435 | That does not mean that AnyEvent won't take advantage of some additional |
2450 | That does not mean that AnyEvent won't take advantage of some additional |
2436 | modules if they are installed. |
2451 | modules if they are installed. |
2437 | |
2452 | |
2438 | This section epxlains which additional modules will be used, and how they |
2453 | This section epxlains which additional modules will be used, and how they |
2439 | affect AnyEvent's operetion. |
2454 | affect AnyEvent's operation. |
2440 | |
2455 | |
2441 | =over 4 |
2456 | =over 4 |
2442 | |
2457 | |
2443 | =item L<Async::Interrupt> |
2458 | =item L<Async::Interrupt> |
2444 | |
2459 | |
… | |
… | |
2480 | lot less memory), but otherwise doesn't affect guard operation much. It is |
2495 | lot less memory), but otherwise doesn't affect guard operation much. It is |
2481 | purely used for performance. |
2496 | purely used for performance. |
2482 | |
2497 | |
2483 | =item L<JSON> and L<JSON::XS> |
2498 | =item L<JSON> and L<JSON::XS> |
2484 | |
2499 | |
2485 | This module is required when you want to read or write JSON data via |
2500 | One of these modules is required when you want to read or write JSON data |
2486 | L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2501 | via L<AnyEvent::Handle>. It is also written in pure-perl, but can take |
2487 | advantage of the ultra-high-speed L<JSON::XS> module when it is installed. |
2502 | advantage of the ultra-high-speed L<JSON::XS> module when it is installed. |
2488 | |
2503 | |
2489 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2504 | In fact, L<AnyEvent::Handle> will use L<JSON::XS> by default if it is |
2490 | installed. |
2505 | installed. |
2491 | |
2506 | |