listener: use edge-triggered notifications

[public-inbox.git] / lib / PublicInbox / Listener.pm

diff --git a/lib/PublicInbox/Listener.pm b/lib/PublicInbox/Listener.pm
index 94b2aed4db632c597eac684057e26264f80859eb..594dabb83e38eacd2b2733c952c205e3ffdc2456 100644 (file)
--- a/lib/PublicInbox/Listener.pm
+++ b/lib/PublicInbox/Listener.pm
@@ -9,6 +9,7 @@ use base 'PublicInbox::DS';
 use Socket qw(SOL_SOCKET SO_KEEPALIVE IPPROTO_TCP TCP_NODELAY);
 use fields qw(post_accept);
 require IO::Handle;
+use PublicInbox::Syscall qw(EPOLLIN EPOLLEXCLUSIVE EPOLLET);
 
 sub new ($$$) {
        my ($class, $s, $cb) = @_;
@@ -17,15 +18,14 @@ sub new ($$$) {
        listen($s, 1024);
        IO::Handle::blocking($s, 0);
        my $self = fields::new($class);
-       $self->SUPER::new($s, PublicInbox::DS::EPOLLIN()|
-                             PublicInbox::DS::EPOLLEXCLUSIVE());
+       $self->SUPER::new($s, EPOLLIN|EPOLLET|EPOLLEXCLUSIVE);
        $self->{post_accept} = $cb;
        $self
 }
 
 sub event_step {
        my ($self) = @_;
-       my $sock = $self->{sock};
+       my $sock = $self->{sock} or return;
 
        # no loop here, we want to fairly distribute clients
        # between multiple processes sharing the same socket
@@ -35,6 +35,7 @@ sub event_step {
        if (my $addr = accept(my $c, $sock)) {
                IO::Handle::blocking($c, 0); # no accept4 :<
                $self->{post_accept}->($c, $addr, $sock);
+               $self->requeue;
        }
 }