# /* * Copyright 1973 Bell Telephone Laboratories Inc */ #include "../param.h" #include "../systm.h" #include "../user.h" #include "../proc.h" #define UMODE 0170000 #define CSW 0177570 #define PS 0177776 struct { int integ; }; clock(dev, sp, r1, nps, r0, pc, ps) { register struct callo *p1, *p2; register struct proc *pp; /* * restart clock */ *lks = 0115; /* * display register */ display(); /* * callouts * if none, just return * else update first non-zero time */ if(callout[0].c_func == 0) goto out; p2 = &callout[0]; while(p2->c_time<=0 && p2->c_func!=0) p2++; p2->c_time--; /* * if ps is high, just return */ if((ps&0340) != 0) goto out; /* * callout */ spl5(); if(callout[0].c_time <= 0) { p1 = &callout[0]; while(p1->c_func != 0 && p1->c_time <= 0) { (*p1->c_func)(p1->c_arg); p1++; } p2 = &callout[0]; while(p2->c_func = p1->c_func) { p2->c_time = p1->c_time; p2->c_arg = p1->c_arg; p1++; p2++; } } /* * lightning bolt time-out * and time of day */ out: if((ps&UMODE) == UMODE) { u.u_utime++; if(u.u_prof[3]) incupc(pc, u.u_prof); } else u.u_stime++; if(++lbolt >= 60) { if((ps&0340) != 0) return; lbolt =- 60; if(++time[1] == 0) ++time[0]; spl1(); if(time[1]==tout[1] && time[0]==tout[0]) wakeup(tout); if((time[1]&03) == 0) wakeup(&lbolt); for(pp = &proc[0]; pp < &proc[NPROC]; pp++) if(pp->p_time != 127) pp->p_time++; if(runin!=0) { runin = 0; wakeup(&runin); } if((ps&UMODE) == UMODE) { u.u_ar0 = &r0; pp = u.u_procp; if(issig()) psig(); if(pp->p_pri < 105) pp->p_pri++; savfp(); swtch(); } } } timeout(fun, arg, tim) { register struct callo *p1, *p2; register t; int s; t = tim; s = PS->integ; p1 = &callout[0]; spl7(); while(p1->c_func != 0 && p1->c_time <= t) { t =- p1->c_time; p1++; } p1->c_time =- t; p2 = p1; while(p2->c_func != 0) p2++; while(p2 >= p1) { (p2+1)->c_time = p2->c_time; (p2+1)->c_func = p2->c_func; (p2+1)->c_arg = p2->c_arg; p2--; } p1->c_time = t; p1->c_func = fun; p1->c_arg = arg; PS->integ = s; }