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#define uv__handle_ref(h)                                                     \
  do {                                                                        \
    if (((h)->flags & UV__HANDLE_REF) != 0) break;                            \
    (h)->flags |= UV__HANDLE_REF;                                             \
    if (((h)->flags & UV__HANDLE_CLOSING) != 0) break;                        \
    if (((h)->flags & UV__HANDLE_ACTIVE) != 0) uv__active_handle_add(h);      \
  }                                                                           \
  while (0)