void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
void dual_timestamp_deserialize(const char *value, dual_timestamp *t);
int parse_timestamp(const char *t, usec_t *usec);
void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
void dual_timestamp_deserialize(const char *value, dual_timestamp *t);
int parse_timestamp(const char *t, usec_t *usec);