ds: simplify signalfd use

Since signalfd is often combined with our event loop, give it a
convenient API and reduce the code duplication required to use it.

EventLoop is replaced with ::event_loop to allow consistent
parameter passing and avoid needlessly passing the package name
on stack.

We also avoid exporting SFD_NONBLOCK since it's the only flag we
support.  There's no sense in having the memory overhead of a
constant function when it's in cold code.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/watch_maildir.t b/t/watch_maildir.t
index e74b512f..6399fb7c 100644
--- a/t/watch_maildir.t
+++ b/t/watch_maildir.t
@@ -199,7 +199,7 @@ More majordomo info at  http://vger.kernel.org/majordomo-info.html\n);
 
         $em->commit; # wake -watch up
         diag 'waiting for -watch to import new message';
-        PublicInbox::DS->EventLoop;
+        PublicInbox::DS::event_loop();
         $wm->kill;
         $wm->join;
         $ii->close;