1 # Copyright (C) 2021 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # op dispatch socket, reads a message, runs a sub
5 # There may be multiple producers, but (for now) only one consumer
6 # Used for lei_xsearch and maybe other things
7 # "literal" => [ sub, @operands ]
8 # /regexp/ => [ sub, @operands ]
9 package PublicInbox::PktOp;
12 use parent qw(PublicInbox::DS);
13 use Errno qw(EAGAIN EINTR);
14 use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
15 use Socket qw(AF_UNIX MSG_EOR SOCK_SEQPACKET);
18 my ($cls, $r, $ops, $in_loop) = @_;
19 my $self = bless { sock => $r, ops => $ops, re => [] }, $cls;
20 if (ref($ops) eq 'ARRAY') {
24 push @{$self->{re}}, $op;
26 $ops{$op->[0]} = $op->[1];
31 if ($in_loop) { # iff using DS->EventLoop
33 $self->SUPER::new($r, EPOLLIN|EPOLLET);
38 # returns a blessed object as the consumer, and a GLOB/IO for the producer
40 my ($cls, $ops, $in_loop) = @_;
42 socketpair($c, $p, AF_UNIX, SOCK_SEQPACKET, 0) or die "socketpair: $!";
43 (new($cls, $c, $ops, $in_loop), $p);
48 my $c = $self->{sock} or return;
49 $c->blocking ? delete($self->{sock}) : $self->SUPER::close;
54 my $c = $self->{sock};
57 my $n = recv($c, $msg, 128, 0);
59 return if $! == EAGAIN;
64 my $op = $self->{ops}->{$msg};
66 for my $re_op (@{$self->{re}}) {
67 $msg =~ $re_op->[0] or next;
72 die "BUG: unknown message: `$msg'" unless $op;
73 my ($sub, @args) = @$op;
75 return $self->close if $msg eq ''; # close on EOF