static extern uint g_idle_add(SourceProxy.GSourceFuncInternal d, IntPtr data);
static extern uint g_timeout_add(uint interval, SourceProxy.GSourceFuncInternal d, IntPtr data);
static extern uint g_idle_add(SourceProxy.GSourceFuncInternal d, IntPtr data);
static extern uint g_timeout_add(uint interval, SourceProxy.GSourceFuncInternal d, IntPtr data);