MLXCX_BUFFER_FREE
ASSERT3U(b->mlb_state, ==, MLXCX_BUFFER_FREE);
ASSERT3U(b->mlb_state, ==, MLXCX_BUFFER_FREE);
ASSERT3U(b->mlb_state, ==, MLXCX_BUFFER_FREE);
VERIFY3U(oldstate, !=, MLXCX_BUFFER_FREE);
b->mlb_state = MLXCX_BUFFER_FREE;
case MLXCX_BUFFER_FREE:
VERIFY(b->mlb_state == MLXCX_BUFFER_FREE ||
if (b->mlb_state == MLXCX_BUFFER_FREE) {