diff options
| -rw-r--r-- | ext/sleepy_penguin/epoll.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/ext/sleepy_penguin/epoll.c b/ext/sleepy_penguin/epoll.c index 8155c4a..09c4bf7 100644 --- a/ext/sleepy_penguin/epoll.c +++ b/ext/sleepy_penguin/epoll.c @@ -306,6 +306,17 @@ void sleepy_penguin_init_epoll(void) rb_define_const(cEpoll, "WAKEUP", UINT2NUM(EPOLLWAKEUP)); #endif +#ifdef EPOLLEXCLUSIVE + /* + * Sets an exclusive wakeup mode for the epoll object + * that is being attached to the target IO. This + * avoids thundering herd scenarios when the same + * target IO is shared among multiple epoll objects. + * Available since Linux 4.5 + */ + rb_define_const(cEpoll, "EXCLUSIVE", UINT2NUM(EPOLLEXCLUSIVE)); +#endif + /* watch for urgent read(2) data */ rb_define_const(cEpoll, "PRI", UINT2NUM(EPOLLPRI)); |