From ad281240644ee370c75d95b35ad7833863257286 Mon Sep 17 00:00:00 2001
From: "Eric Wong (Contractor, The Linux Foundation)" <e@80x24.org>
Date: Mon, 19 Mar 2018 08:14:34 +0000
Subject: v2writable: support "barrier" operation to avoid reforking

Stopping and starting a bunch of processes to look up duplicates
or removals is inefficient.  Take advantage of checkpointing
in "git fast-import" and transactions in Xapian and SQLite.
---
 lib/PublicInbox/Import.pm | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'lib/PublicInbox/Import.pm')

diff --git a/lib/PublicInbox/Import.pm b/lib/PublicInbox/Import.pm
index 664bec69..8406c9e2 100644
--- a/lib/PublicInbox/Import.pm
+++ b/lib/PublicInbox/Import.pm
@@ -133,7 +133,6 @@ sub check_remove_v1 {
 	(undef, $cur);
 }
 
-# used for v2 (maybe)
 sub checkpoint {
 	my ($self) = @_;
 	return unless $self->{pid};
@@ -141,6 +140,15 @@ sub checkpoint {
 	undef;
 }
 
+sub progress {
+	my ($self, $msg) = @_;
+	return unless $self->{pid};
+	print { $self->{out} } "progress $msg\n" or wfail;
+	$self->{in}->getline eq "progress $msg\n" or die
+		"progress $msg not received\n";
+	undef;
+}
+
 # used for v2
 sub get_mark {
 	my ($self, $mark) = @_;
-- 
cgit v1.2.3-24-ge0c7