| 1 |
=head1 NAME |
| 2 |
|
| 3 |
AnyEvent::Util - various utility functions. |
| 4 |
|
| 5 |
=head1 SYNOPSIS |
| 6 |
|
| 7 |
use AnyEvent::Util; |
| 8 |
|
| 9 |
inet_aton $name, $cb->($ipn || undef); |
| 10 |
|
| 11 |
=head1 DESCRIPTION |
| 12 |
|
| 13 |
This module implements various utility functions, mostly replacing |
| 14 |
well-known functions by event-ised counterparts. |
| 15 |
|
| 16 |
=over 4 |
| 17 |
|
| 18 |
=cut |
| 19 |
|
| 20 |
package AnyEvent::Util; |
| 21 |
|
| 22 |
use strict; |
| 23 |
|
| 24 |
no warnings "uninitialized"; |
| 25 |
|
| 26 |
use Socket (); |
| 27 |
|
| 28 |
use AnyEvent; |
| 29 |
|
| 30 |
use base 'Exporter'; |
| 31 |
|
| 32 |
#our @EXPORT = qw(gethostbyname gethostbyaddr); |
| 33 |
our @EXPORT_OK = qw(inet_aton); |
| 34 |
|
| 35 |
our $VERSION = '1.0'; |
| 36 |
|
| 37 |
our $MAXPARALLEL = 16; # max. number of parallel jobs |
| 38 |
|
| 39 |
our $running; |
| 40 |
our @queue; |
| 41 |
|
| 42 |
sub _schedule; |
| 43 |
sub _schedule { |
| 44 |
return unless @queue; |
| 45 |
return if $running >= $MAXPARALLEL; |
| 46 |
|
| 47 |
++$running; |
| 48 |
my ($cb, $sub, @args) = @{shift @queue}; |
| 49 |
|
| 50 |
if (eval { local $SIG{__DIE__}; require POSIX }) { |
| 51 |
my $pid = open my $fh, "-|"; |
| 52 |
|
| 53 |
if (!defined $pid) { |
| 54 |
die "fork: $!"; |
| 55 |
} elsif (!$pid) { |
| 56 |
syswrite STDOUT, join "\0", map { unpack "H*", $_ } $sub->(@args); |
| 57 |
POSIX::_exit (0); |
| 58 |
} |
| 59 |
|
| 60 |
my $w; $w = AnyEvent->io (fh => $fh, poll => 'r', cb => sub { |
| 61 |
--$running; |
| 62 |
_schedule; |
| 63 |
undef $w; |
| 64 |
|
| 65 |
my $buf; |
| 66 |
sysread $fh, $buf, 16384, length $buf; |
| 67 |
$cb->(map { pack "H*", $_ } split /\0/, $buf); |
| 68 |
}); |
| 69 |
} else { |
| 70 |
$cb->($sub->(@args)); |
| 71 |
} |
| 72 |
} |
| 73 |
|
| 74 |
sub _do_asy { |
| 75 |
push @queue, [@_]; |
| 76 |
_schedule; |
| 77 |
} |
| 78 |
|
| 79 |
sub dotted_quad($) { |
| 80 |
$_[0] =~ /^(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?) |
| 81 |
\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?) |
| 82 |
\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?) |
| 83 |
\.(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9]?)$/x |
| 84 |
} |
| 85 |
|
| 86 |
my $has_ev_adns; |
| 87 |
|
| 88 |
sub has_ev_adns { |
| 89 |
($has_ev_adns ||= do { |
| 90 |
my $model = AnyEvent::detect; |
| 91 |
(($model eq "AnyEvent::Impl::CoroEV" or $model eq "AnyEvent::Impl::EV") |
| 92 |
&& eval { local $SIG{__DIE__}; require EV::ADNS }) |
| 93 |
? 2 : 1 # so that || always detects as true |
| 94 |
}) - 1 # 2 => true, 1 => false |
| 95 |
} |
| 96 |
|
| 97 |
=item AnyEvent::Util::inet_aton $name_or_address, $cb->($binary_address_or_undef) |
| 98 |
|
| 99 |
Works almost exactly like its Socket counterpart, except that it uses a |
| 100 |
callback. |
| 101 |
|
| 102 |
=cut |
| 103 |
|
| 104 |
sub inet_aton { |
| 105 |
my ($name, $cb) = @_; |
| 106 |
|
| 107 |
if (&dotted_quad) { |
| 108 |
$cb->(Socket::inet_aton $name); |
| 109 |
} elsif ($name eq "localhost") { # rfc2606 et al. |
| 110 |
$cb->(v127.0.0.1); |
| 111 |
} elsif (&has_ev_adns) { |
| 112 |
EV::ADNS::submit ($name, &EV::ADNS::r_addr, 0, sub { |
| 113 |
my (undef, undef, @a) = @_; |
| 114 |
$cb->(@a ? Socket::inet_aton $a[0] : undef); |
| 115 |
}); |
| 116 |
} else { |
| 117 |
_do_asy $cb, sub { Socket::inet_aton $_[0] }, @_; |
| 118 |
} |
| 119 |
} |
| 120 |
|
| 121 |
=item AnyEvent::Util::fh_nonblocking $fh, $nonblocking |
| 122 |
|
| 123 |
Sets the blocking state of the given filehandle (true == nonblocking, |
| 124 |
false == blocking). Uses fcntl on anything sensible and ioctl FIONBIO on |
| 125 |
broken (i.e. windows) platforms. |
| 126 |
|
| 127 |
=cut |
| 128 |
|
| 129 |
sub fh_nonblocking($$) { |
| 130 |
my ($fh, $nb) = @_; |
| 131 |
|
| 132 |
require Fcntl; |
| 133 |
|
| 134 |
if ($^O eq "MSWin32") { |
| 135 |
$nb = (! ! $nb) + 0; |
| 136 |
ioctl $fh, 0x8004667e, \$nb; # FIONBIO |
| 137 |
} else { |
| 138 |
fcntl $fh, &Fcntl::F_SETFL, $nb ? &Fcntl::O_NONBLOCK : 0; |
| 139 |
} |
| 140 |
} |
| 141 |
|
| 142 |
1; |
| 143 |
|
| 144 |
=back |
| 145 |
|
| 146 |
=head1 AUTHOR |
| 147 |
|
| 148 |
Marc Lehmann <schmorp@schmorp.de> |
| 149 |
http://home.schmorp.de/ |
| 150 |
|
| 151 |
=cut |
| 152 |
|
