INVALID_START_TIME
evsel->duration_time.start_time = INVALID_START_TIME;
*start_time = INVALID_START_TIME;
*start_time = INVALID_START_TIME;
if (*start_time != INVALID_START_TIME && val >= *start_time)
*start_time = INVALID_START_TIME;
evsel->duration_time.start_time != INVALID_START_TIME)
if (*start_time != INVALID_START_TIME && cur_time >= *start_time)