ds: use object-oriented API for epoll

This allows us to cut down on imports and reduce code.
This also makes it easier (in the next commit) to provide an option
to disable epoll/kqueue when saving an FD is valued over scalability.

1 files changed, 23 insertions, 0 deletions

diff --git a/lib/PublicInbox/Epoll.pm b/lib/PublicInbox/Epoll.pm
new file mode 100644
index 00000000..d55c8535
--- /dev/null
+++ b/lib/PublicInbox/Epoll.pm
@@ -0,0 +1,23 @@
+# Copyright (C) all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+# OO API for epoll
+package PublicInbox::Epoll;
+use v5.12;
+use PublicInbox::Syscall qw(epoll_create epoll_ctl epoll_wait
+        EPOLL_CTL_ADD EPOLL_CTL_MOD EPOLL_CTL_DEL);
+use Fcntl qw(F_SETFD FD_CLOEXEC);
+use autodie qw(open fcntl);
+
+sub new {
+        open(my $fh, '+<&=', epoll_create());
+        fcntl($fh, F_SETFD, FD_CLOEXEC);
+        bless \$fh, __PACKAGE__;
+}
+
+sub ep_add { epoll_ctl(fileno(${$_[0]}), EPOLL_CTL_ADD, fileno($_[1]), $_[2]) }
+sub ep_mod { epoll_ctl(fileno(${$_[0]}), EPOLL_CTL_MOD, fileno($_[1]), $_[2]) }
+sub ep_del { epoll_ctl(fileno(${$_[0]}), EPOLL_CTL_DEL, fileno($_[1]), 0) }
+sub ep_wait { epoll_wait(fileno(${$_[0]}), @_[1, 2, 3]) }
+
+1;