[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..b2bdb96cf8eb8e6b7633bbeb5f9ca67ba51dccbc 100644
--- a/native_client_sdk/src/libraries/nacl_io/mount_node.cc
+++ b/native_client_sdk/src/libraries/nacl_io/mount_node.cc
@@ -27,6 +27,7 @@ MountNode::MountNode(Mount* mount) : mount_(mount) {
   memset(&stat_, 0, sizeof(stat_));
   stat_.st_gid = GRP_ID;
   stat_.st_uid = USR_ID;
+  state_ = 0;
 
   // Mount should normally never be NULL, but may be null in tests.
   // If NULL, at least set the inode to a valid (nonzero) value.
@@ -40,6 +41,7 @@ MountNode::~MountNode() {}
 
 Error MountNode::Init(int perm) {
   stat_.st_mode |= perm;
+  state_ |= perm & (O_NONBLOCK);
   return 0;
 }
 
@@ -49,13 +51,14 @@ 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; }