[NaCl SDK] Support non blocking TCP/UDP

native_client_sdk/src/libraries/nacl_io/mount_node.cc

Index: native_client_sdk/src/libraries/nacl_io/mount_node.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/mount_node.cc b/native_client_sdk/src/libraries/nacl_io/mount_node.cc
index 4a0c0651d9c58f4687da117742509a25f3e777f4..5598c27fdf73c8cc9dae6cadb514eb8e3ebf7f90 100644
--- a/native_client_sdk/src/libraries/nacl_io/mount_node.cc
+++ b/native_client_sdk/src/libraries/nacl_io/mount_node.cc
@@ -49,13 +49,14 @@ void MountNode::Destroy() {
   }
 }
 
-// Declared in EventEmitter, default to regular files which always return
-// a ready of TRUE for read, write, or error.
+EventEmitter* MountNode::GetEventEmitter() { return NULL; }
+
 uint32_t MountNode::GetEventStatus() {
-  uint32_t val = POLLIN | POLLOUT | POLLERR;
-  return val;
-}
+  if (GetEventEmitter())
+    return GetEventEmitter()->GetEventStatus();
 
+  return POLLIN | POLLOUT;
+}
 
 Error MountNode::FSync() { return 0; }