epoll: add EPOLLWAKEUP constant

This was added in Linux 3.5 and glibc 2.17

1 files changed, 9 insertions, 0 deletions

diff --git a/ext/sleepy_penguin/epoll.c b/ext/sleepy_penguin/epoll.c
index a507b0c..2b7f5c1 100644
--- a/ext/sleepy_penguin/epoll.c
+++ b/ext/sleepy_penguin/epoll.c
@@ -764,6 +764,15 @@ void sleepy_penguin_init_epoll(void)
         rb_define_const(cEpoll, "RDHUP", UINT2NUM(EPOLLRDHUP));
 #endif
 
+#ifdef EPOLLWAKEUP
+        /*
+         * This prevents system suspend while event is ready.
+         * This requires the caller to have the CAP_BLOCK_SUSPEND capability
+         * Available since Linux 3.5
+         */
+        rb_define_const(cEpoll, "WAKEUP", UINT2NUM(EPOLLWAKEUP));
+#endif
+
         /* watch for urgent read(2) data */
         rb_define_const(cEpoll, "PRI", UINT2NUM(EPOLLPRI));