1 #include "syslib.h" 2 3 int sys_vtimer(proc, which, newval, oldval) 4 endpoint_t proc; /* proc to retrieve/set the timer for */ 5 int which; /* timer to retrieve/set */ 6 clock_t *newval; /* if non-NULL, set to this new value */ 7 clock_t *oldval; /* if non-NULL, old value is stored here */ 8 { 9 message m; 10 int r; 11 12 m.VT_ENDPT = proc; 13 m.VT_WHICH = which; 14 if (newval != NULL) { 15 m.VT_SET = 1; 16 m.VT_VALUE = *newval; 17 } else { 18 m.VT_SET = 0; 19 } 20 21 r = _kernel_call(SYS_VTIMER, &m); 22 23 if (oldval != NULL) { 24 *oldval = m.VT_VALUE; 25 } 26 27 return(r); 28 } 29