27 #include <dbus/dbus-socket-set.h>    30 _dbus_socket_set_new (
int size_hint)
    34 #ifdef DBUS_HAVE_LINUX_EPOLL    35   ret = _dbus_socket_set_epoll_new ();
    41   ret = _dbus_socket_set_poll_new (size_hint);
 #define NULL
A null pointer, defined appropriately for C or C++.