1 files changed, 6 insertions, 3 deletions
diff --git a/src/core/lib/iomgr/workqueue_posix.h b/src/core/lib/iomgr/workqueue_posix.h
index 0f26ba58e2..03ee21cef7 100644
--- a/src/core/lib/iomgr/workqueue_posix.h
+++ b/src/core/lib/iomgr/workqueue_posix.h
@@ -35,14 +35,17 @@
 #define GRPC_CORE_LIB_IOMGR_WORKQUEUE_POSIX_H
 
 #include "src/core/lib/iomgr/wakeup_fd_posix.h"
+#include "src/core/lib/support/mpscq.h"
 
 struct grpc_fd;
 
 struct grpc_workqueue {
   gpr_refcount refs;
-
-  gpr_mu mu;
-  grpc_closure_list closure_list;
+  gpr_mpscq queue;
+  // state is:
+  // lower bit - zero if orphaned
+  // other bits - number of items enqueued
+  gpr_atm state;
 
   grpc_wakeup_fd wakeup_fd;
   struct grpc_fd *wakeup_read_fd;