2000/0623/pc/cycintr.c (diff list | history)

pc/cycintr.c on 2000/0623
2000/0623		#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" static struct { Lock; vlong when; /* next scheduled interrupt time */ Cycintr *ci; }cycintrs; static void cycsched(void) { } void checkcycintr(Ureg *u, void*) { Cycintr *ci; ilock(&cycintrs); while(ci = cycintrs.ci){ if(ci->when > fastticks(nil)) break; cycintrs.ci = ci->next; iunlock(&cycintrs); (*ci->f)(u, ci); ilock(&cycintrs); } cycsched(); iunlock(&cycintrs); } void cycintradd(Cycintr *nci) { Cycintr *ci, **last; ilock(&cycintrs); last = &cycintrs.ci; while(ci = *last){ if(ci == nci){ *last = ci->next; break; } last = &ci->next; } last = &cycintrs.ci; while(ci = *last){ if(ci->when > nci->when) break; last = &ci->next; } nci->next = *last; *last = nci; if(nci->when < cycintrs.when) cycsched(); iunlock(&cycintrs); } void cycintrdel(Cycintr *dci) { Cycintr *ci, **last; ilock(&cycintrs); last = &cycintrs.ci; while(ci = *last){ if(ci == dci){ *last = ci->next; break; } last = &ci->next; } iunlock(&cycintrs); }