[PATCH 08/21] lei: keep $lei around until workers are reaped

[Eric Wong <e@80x24.org>]

This prevents SharedKV->DESTROY in lei-daemon from triggering
before DB handles are closed in lei2mail processes.  The
{each_smsg_not_done} pipe was not sufficient in this case:
that gets closed at the end of the last git_to_mail callback
invocation.
---
 lib/PublicInbox/IPC.pm        | 10 +++++-----
 lib/PublicInbox/LEI.pm        |  2 +-
 lib/PublicInbox/LeiXSearch.pm |  4 ++--
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/lib/PublicInbox/IPC.pm b/lib/PublicInbox/IPC.pm
index 37f02944..689f32d0 100644
--- a/lib/PublicInbox/IPC.pm
+++ b/lib/PublicInbox/IPC.pm
@@ -137,7 +137,7 @@ sub ipc_worker_spawn {
 }
 
 sub ipc_worker_reap { # dwaitpid callback
-	my ($self, $pid) = @_;
+	my ($args, $pid) = @_;
 	return if !$?;
 	# TERM(15) is our default exit signal, PIPE(13) is likely w/ pager
 	my $s = $? & 127;
@@ -145,9 +145,9 @@ sub ipc_worker_reap { # dwaitpid callback
 }
 
 sub wq_wait_old {
-	my ($self) = @_;
+	my ($self, $args) = @_;
 	my $pids = delete $self->{"-wq_old_pids.$$"} or return;
-	dwaitpid($_, \&ipc_worker_reap, $self) for @$pids;
+	dwaitpid($_, \&ipc_worker_reap, [$self, $args]) for @$pids;
 }
 
 # for base class, override in sub classes
@@ -164,7 +164,7 @@ sub ipc_atfork_child {
 
 # idempotent, can be called regardless of whether worker is active or not
 sub ipc_worker_stop {
-	my ($self) = @_;
+	my ($self, $args) = @_;
 	my ($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) {
@@ -175,7 +175,7 @@ sub ipc_worker_stop {
 	$w_req = $r_res = undef;
 
 	return if $$ != $ppid;
-	dwaitpid($pid, \&ipc_worker_reap, $self);
+	dwaitpid($pid, \&ipc_worker_reap, [$self, $args]);
 }
 
 # use this if we have multiple readers reading curl or "pigz -dc"
diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index c0b90451..4f7ed171 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -860,7 +860,7 @@ sub dclose {
 		if ($wq->wq_kill) {
 			$wq->wq_close
 		} elsif ($wq->wq_kill_old) {
-			$wq->wq_wait_old;
+			$wq->wq_wait_old($self);
 		}
 	}
 	close(delete $self->{1}) if $self->{1}; # may reap_compress
diff --git a/lib/PublicInbox/LeiXSearch.pm b/lib/PublicInbox/LeiXSearch.pm
index de82a7da..b4a9b89d 100644
--- a/lib/PublicInbox/LeiXSearch.pm
+++ b/lib/PublicInbox/LeiXSearch.pm
@@ -283,7 +283,7 @@ sub query_done { # EOF callback
 	my $has_l2m = exists $lei->{l2m};
 	for my $f (qw(lxs l2m)) {
 		my $wq = delete $lei->{$f} or next;
-		$wq->wq_wait_old;
+		$wq->wq_wait_old($lei);
 	}
 	$lei->{ovv}->ovv_end($lei);
 	if ($has_l2m) { # close() calls LeiToMail reap_compress
@@ -359,7 +359,7 @@ sub sigpipe_handler { # handles SIGPIPE from l2m/lxs workers
 	my ($lei) = @_;
 	my $lxs = delete $lei->{lxs};
 	if ($lxs && $lxs->wq_kill_old) { # is this the daemon?
-		$lxs->wq_wait_old;
+		$lxs->wq_wait_old($lei);
 	}
 	close(delete $lei->{1}) if $lei->{1};
 	$lei->x_it(13);