XBT_PUBLIC(xbt_os_timer_t) xbt_os_timer_new(void);
XBT_PUBLIC(void) xbt_os_timer_free(xbt_os_timer_t timer);
XBT_PUBLIC(double) xbt_os_timer_elapsed(xbt_os_timer_t timer);
XBT_PUBLIC(xbt_os_timer_t) xbt_os_timer_new(void);
XBT_PUBLIC(void) xbt_os_timer_free(xbt_os_timer_t timer);
XBT_PUBLIC(double) xbt_os_timer_elapsed(xbt_os_timer_t timer);