From 7a59b56e53020e655f83d65c165dfb8c228ddf4d Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 13 Apr 2017 14:20:47 -0700
Subject: [PATCH] sketching pollable set

---
 src/core/lib/iomgr/ev_epollex_linux.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/core/lib/iomgr/ev_epollex_linux.c b/src/core/lib/iomgr/ev_epollex_linux.c
index a8d7b54887d..0b3e2b13fc8 100644
--- a/src/core/lib/iomgr/ev_epollex_linux.c
+++ b/src/core/lib/iomgr/ev_epollex_linux.c
@@ -177,7 +177,11 @@ struct grpc_pollset_worker {
 
 struct grpc_pollset {
   polling_obj po;
-  int epfd;
+  /* Pollable set - possible values:
+     0              - nothing is pollable
+     pointer | 1    - a single pollable file descriptor
+     (fd << 1) | 0  - an epoll fd */
+  gpr_atm pollable_set_atm;
   int num_pollers;
   bool kicked_without_poller;
   gpr_atm shutdown_atm;