-# Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# base class for remote IPC calls and workqueues, requires Storable or Sereal
use v5.10.1;
use parent qw(Exporter);
use Carp qw(croak);
-use PublicInbox::DS qw(dwaitpid);
+use PublicInbox::DS qw(awaitpid);
use PublicInbox::Spawn;
use PublicInbox::OnDestroy;
use PublicInbox::WQWorker;
}
my $recv_cmd = PublicInbox::Spawn->can('recv_cmd4');
-my $send_cmd = PublicInbox::Spawn->can('send_cmd4') // do {
+our $send_cmd = PublicInbox::Spawn->can('send_cmd4') // do {
require PublicInbox::CmdIPC4;
$recv_cmd //= PublicInbox::CmdIPC4->can('recv_cmd4');
PublicInbox::CmdIPC4->can('send_cmd4');
$self->{-ipc_req} = $w_req;
$self->{-ipc_res} = $r_res;
$self->{-ipc_ppid} = $$;
+ awaitpid($pid, \&ipc_worker_reap, $self);
$self->{-ipc_pid} = $pid;
}
-sub ipc_worker_reap { # dwaitpid callback
- my ($args, $pid) = @_;
- my ($self, @uargs) = @$args;
+sub ipc_worker_reap { # awaitpid callback
+ my ($pid, $self) = @_;
delete $self->{-wq_workers}->{$pid};
- return $self->{-reap_do}->($args, $pid) if $self->{-reap_do};
+ if (my $cb_args = $self->{-reap_do}) {
+ return $cb_args->[0]->($pid, $self, @$cb_args[1..$#$cb_args]);
+ }
return if !$?;
my $s = $? & 127;
# TERM(15) is our default exit signal, PIPE(13) is likely w/ pager
warn "$self->{-wq_ident} PID:$pid died \$?=$?\n" if $s != 15 && $s != 13
}
-sub wq_wait_async {
- my ($self, $cb, @uargs) = @_;
- local $PublicInbox::DS::in_loop = 1;
- $self->{-reap_async} = 1;
- $self->{-reap_do} = $cb;
- my @pids = keys %{$self->{-wq_workers}};
- dwaitpid($_, \&ipc_worker_reap, [ $self, @uargs ]) for @pids;
+# register wait workers
+sub awaitpid_init {
+ my ($self, @cb_args) = @_;
+ $self->{-reap_do} = \@cb_args;
}
# for base class, override in sub classes
# idempotent, can be called regardless of whether worker is active or not
sub ipc_worker_stop {
- my ($self, $args) = @_;
+ my ($self) = @_;
my ($pid, $ppid) = delete(@$self{qw(-ipc_pid -ipc_ppid)});
my ($w_req, $r_res) = delete(@$self{qw(-ipc_req -ipc_res)});
if (!$w_req && !$r_res) {
}
die 'no PID with IPC pipes' unless $pid;
$w_req = $r_res = undef;
-
- return if $$ != $ppid;
- dwaitpid($pid, \&ipc_worker_reap, [$self, $args]);
+ awaitpid($pid) if $$ == $ppid; # for non-event loop
}
# use this if we have multiple readers reading curl or "pigz -dc"
}
}
+sub prepare_nonblock {
+ ($_[0]->{-wq_s1} // die 'BUG: no {-wq_s1}')->blocking(0);
+ $_[0]->{-reap_do} or die 'BUG: {-reap_do} needed for nonblock';
+ require PublicInbox::WQBlocked;
+}
+
+sub wq_nonblock_do { # always async
+ my ($self, $sub, @args) = @_;
+ my $buf = ipc_freeze([$sub, @args]);
+ if ($self->{wqb}) { # saturated once, assume saturated forever
+ $self->{wqb}->flush_send($buf);
+ } else {
+ $send_cmd->($self->{-wq_s1}, [], $buf, MSG_EOR) //
+ ($!{EAGAIN} ? PublicInbox::WQBlocked->new($self, $buf)
+ : croak("sendmsg: $!"));
+ }
+}
+
sub _wq_worker_start ($$$$) {
my ($self, $oldset, $fields, $one) = @_;
my ($bcast1, $bcast2);
undef $end; # trigger exit
} else {
$self->{-wq_workers}->{$pid} = $bcast1;
+ awaitpid($pid, \&ipc_worker_reap, $self);
}
}
sub wq_close {
my ($self) = @_;
+ if (my $wqb = delete $self->{wqb}) {
+ $self->{-reap_do} or die 'BUG: {-reap_do} unset';
+ $wqb->enq_close;
+ }
delete @$self{qw(-wq_s1 -wq_s2)} or return;
- return if $self->{-reap_async};
- my @pids = keys %{$self->{-wq_workers}};
- dwaitpid($_, \&ipc_worker_reap, [ $self ]) for @pids;
+ return if $self->{-reap_do};
+ awaitpid($_) for keys %{$self->{-wq_workers}};
}
sub wq_kill {