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=head1 NAME |
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|
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AnyEvent::Util - various utility functions. |
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|
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=head1 SYNOPSIS |
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|
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use AnyEvent::Util; |
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|
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inet_aton $name, $cb->($ipn || undef) |
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|
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=head1 DESCRIPTION |
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|
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This module implements various utility functions, mostly replacing |
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well-known functions by event-ised counterparts. |
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|
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=over 4 |
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|
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=cut |
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|
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package AnyEvent::Util; |
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|
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use strict; |
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|
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no warnings "uninitialized"; |
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|
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use Socket (); |
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|
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use AnyEvent; |
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|
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use base 'Exporter'; |
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|
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#our @EXPORT = qw(gethostbyname gethostbyaddr); |
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our @EXPORT_OK = qw(inet_aton fork_eval); |
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|
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our $VERSION = '1.0'; |
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|
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our $MAXPARALLEL = 16; # max. number of parallel jobs |
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|
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our $running; |
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our @queue; |
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|
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sub _schedule; |
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sub _schedule { |
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return unless @queue; |
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return if $running >= $MAXPARALLEL; |
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|
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++$running; |
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my ($cb, $sub, @args) = @{shift @queue}; |
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|
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if (eval { require POSIX }) { |
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my $pid = open my $fh, "-|"; |
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|
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if (!defined $pid) { |
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die "fork: $!"; |
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} elsif (!$pid) { |
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syswrite STDOUT, join "\0", map { unpack "H*", $_ } $sub->(@args); |
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POSIX::_exit (0); |
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} |
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|
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my $w; $w = AnyEvent->io (fh => $fh, poll => 'r', cb => sub { |
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--$running; |
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_schedule; |
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undef $w; |
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|
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my $buf; |
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sysread $fh, $buf, 16384, length $buf; |
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$cb->(map { pack "H*", $_ } split /\0/, $buf); |
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}); |
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} else { |
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$cb->($sub->(@args)); |
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} |
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} |
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|
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sub _do_asy { |
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push @queue, [@_]; |
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_schedule; |
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} |
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|
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sub dotted_quad($) { |
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$_[0] =~ /^(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?) |
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\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?) |
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\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?) |
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\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?)$/x |
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} |
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|
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my $has_ev_adns; |
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|
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sub has_ev_adns { |
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($has_ev_adns ||= do { |
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my $model = AnyEvent::detect; |
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(($model eq "AnyEvent::Impl::CoroEV" or $model eq "AnyEvent::Impl::EV") |
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&& eval { require EV::ADNS }) |
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? 2 : 1 |
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}) - 1 |
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} |
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|
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=item AnyEvent::Util::inet_aton $name_or_address, $cb->($binary_address_or_undef) |
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|
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Works almost exactly like its Socket counterpart, except that it uses a |
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callback. |
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|
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=cut |
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|
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sub inet_aton { |
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my ($name, $cb) = @_; |
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|
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if (&dotted_quad) { |
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$cb->(Socket::inet_aton $name); |
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} elsif (has_ev_adns) { |
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my $current = $Coro::current; |
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my @a; |
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|
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EV::ADNS::submit ($_[0], &EV::ADNS::r_a, 0, sub { |
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(undef, undef, @a) = @_; |
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$cb->(@a ? Socket::inet_aton $a[0] : undef); |
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}); |
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} else { |
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_do_asy $cb, sub { Socket::inet_aton $_[0] }, @_; |
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} |
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} |
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|
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1; |
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|
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=back |
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|
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=head1 AUTHOR |
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|
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Marc Lehmann <schmorp@schmorp.de> |
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http://home.schmorp.de/ |
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|
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=cut |
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|
