… | |
… | |
592 | after => 1, |
592 | after => 1, |
593 | cb => sub { $result_ready->send }, |
593 | cb => sub { $result_ready->send }, |
594 | ); |
594 | ); |
595 | |
595 | |
596 | # this "blocks" (while handling events) till the callback |
596 | # this "blocks" (while handling events) till the callback |
597 | # calls -<send |
597 | # calls ->send |
598 | $result_ready->recv; |
598 | $result_ready->recv; |
599 | |
599 | |
600 | Example: wait for a timer, but take advantage of the fact that condition |
600 | Example: wait for a timer, but take advantage of the fact that condition |
601 | variables are also callable directly. |
601 | variables are also callable directly. |
602 | |
602 | |
… | |
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666 | one. For example, a function that pings many hosts in parallel might want |
666 | one. For example, a function that pings many hosts in parallel might want |
667 | to use a condition variable for the whole process. |
667 | to use a condition variable for the whole process. |
668 | |
668 | |
669 | Every call to C<< ->begin >> will increment a counter, and every call to |
669 | Every call to C<< ->begin >> will increment a counter, and every call to |
670 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
670 | C<< ->end >> will decrement it. If the counter reaches C<0> in C<< ->end |
671 | >>, the (last) callback passed to C<begin> will be executed. That callback |
671 | >>, the (last) callback passed to C<begin> will be executed, passing the |
672 | is I<supposed> to call C<< ->send >>, but that is not required. If no |
672 | condvar as first argument. That callback is I<supposed> to call C<< ->send |
673 | callback was set, C<send> will be called without any arguments. |
673 | >>, but that is not required. If no group callback was set, C<send> will |
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|
674 | be called without any arguments. |
674 | |
675 | |
675 | You can think of C<< $cv->send >> giving you an OR condition (one call |
676 | You can think of C<< $cv->send >> giving you an OR condition (one call |
676 | sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND |
677 | sends), while C<< $cv->begin >> and C<< $cv->end >> giving you an AND |
677 | condition (all C<begin> calls must be C<end>'ed before the condvar sends). |
678 | condition (all C<begin> calls must be C<end>'ed before the condvar sends). |
678 | |
679 | |
… | |
… | |
705 | begung can potentially be zero: |
706 | begung can potentially be zero: |
706 | |
707 | |
707 | my $cv = AnyEvent->condvar; |
708 | my $cv = AnyEvent->condvar; |
708 | |
709 | |
709 | my %result; |
710 | my %result; |
710 | $cv->begin (sub { $cv->send (\%result) }); |
711 | $cv->begin (sub { shift->send (\%result) }); |
711 | |
712 | |
712 | for my $host (@list_of_hosts) { |
713 | for my $host (@list_of_hosts) { |
713 | $cv->begin; |
714 | $cv->begin; |
714 | ping_host_then_call_callback $host, sub { |
715 | ping_host_then_call_callback $host, sub { |
715 | $result{$host} = ...; |
716 | $result{$host} = ...; |
… | |
… | |
1115 | |
1116 | |
1116 | BEGIN { AnyEvent::common_sense } |
1117 | BEGIN { AnyEvent::common_sense } |
1117 | |
1118 | |
1118 | use Carp (); |
1119 | use Carp (); |
1119 | |
1120 | |
1120 | our $VERSION = '5.0'; |
1121 | our $VERSION = '5.112'; |
1121 | our $MODEL; |
1122 | our $MODEL; |
1122 | |
1123 | |
1123 | our $AUTOLOAD; |
1124 | our $AUTOLOAD; |
1124 | our @ISA; |
1125 | our @ISA; |
1125 | |
1126 | |
… | |
… | |
1911 | warn "read: $input\n"; # output what has been read |
1912 | warn "read: $input\n"; # output what has been read |
1912 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1913 | $cv->send if $input =~ /^q/i; # quit program if /^q/i |
1913 | }, |
1914 | }, |
1914 | ); |
1915 | ); |
1915 | |
1916 | |
1916 | my $time_watcher; # can only be used once |
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1917 | |
|
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1918 | sub new_timer { |
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1919 | $timer = AnyEvent->timer (after => 1, cb => sub { |
1917 | my $time_watcher = AnyEvent->timer (after => 1, interval => 1, cb => sub { |
1920 | warn "timeout\n"; # print 'timeout' about every second |
1918 | warn "timeout\n"; # print 'timeout' at most every second |
1921 | &new_timer; # and restart the time |
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|
1922 | }); |
1919 | }); |
1923 | } |
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|
1924 | |
|
|
1925 | new_timer; # create first timer |
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1926 | |
1920 | |
1927 | $cv->recv; # wait until user enters /^q/i |
1921 | $cv->recv; # wait until user enters /^q/i |
1928 | |
1922 | |
1929 | =head1 REAL-WORLD EXAMPLE |
1923 | =head1 REAL-WORLD EXAMPLE |
1930 | |
1924 | |