*
* gives the number of seconds since the Epoch (00:00:00 UTC, January 1, 1970).
*/
-XBT_PUBLIC(double) xbt_os_time();
+XBT_PUBLIC(double) xbt_os_time(void);
XBT_PUBLIC(void) xbt_os_sleep(double sec);
typedef struct s_xbt_os_timer *xbt_os_timer_t;
-XBT_PUBLIC(xbt_os_timer_t) xbt_os_timer_new();
+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(size_t) xbt_os_timer_size();
+XBT_PUBLIC(size_t) xbt_os_timer_size(void);
XBT_PUBLIC(void) xbt_os_walltimer_start(xbt_os_timer_t timer);
XBT_PUBLIC(void) xbt_os_walltimer_resume(xbt_os_timer_t timer);