FEAT_NEEDS_POLLING
#define needs_polling(d) ((d)->features & FEAT_NEEDS_POLLING)
data->features |= FEAT_CLEAR_PEAKS | FEAT_NEEDS_POLLING;
data->features |= FEAT_CLEAR_PEAKS | FEAT_NEEDS_POLLING;
data->features |= FEAT_CLEAR_PEAKS | FEAT_NEEDS_POLLING;
data->features |= FEAT_CLEAR_PEAKS | FEAT_NEEDS_POLLING;
data->features |= FEAT_CLEAR_PEAKS | FEAT_NEEDS_POLLING;
data->features |= FEAT_NEEDS_POLLING;