diff options
| author | Michael Shalayeff <mickey@cvs.openbsd.org> | 1999-04-20 02:20:13 +0000 |
|---|---|---|
| committer | Michael Shalayeff <mickey@cvs.openbsd.org> | 1999-04-20 02:20:13 +0000 |
| commit | e6436270ffeb97dc22f5a01839fb4e34946dbceb (patch) | |
| tree | 7b6dc2bd47d02b29df594eb4838fc2bb39d9fcb2 /sys/stand/boot/cmd.c | |
| parent | 838da128b485c2c1ce2551cfa006e55de0ee8bc6 (diff) | |
make calls for current time to BIOS less often; toby -- ok
Diffstat (limited to 'sys/stand/boot/cmd.c')
| -rw-r--r-- | sys/stand/boot/cmd.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/sys/stand/boot/cmd.c b/sys/stand/boot/cmd.c index dc8b12445e6..687e0ede0ad 100644 --- a/sys/stand/boot/cmd.c +++ b/sys/stand/boot/cmd.c @@ -1,7 +1,7 @@ -/* $OpenBSD: cmd.c,v 1.43 1998/10/29 17:07:24 mickey Exp $ */ +/* $OpenBSD: cmd.c,v 1.44 1999/04/20 02:20:12 mickey Exp $ */ /* - * Copyright (c) 1997,1998 Michael Shalayeff + * Copyright (c) 1997-1999 Michael Shalayeff * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -223,17 +223,20 @@ readline(buf, to) extern int debug; #endif register char *p = buf, *pe = buf, ch; - register time_t tt; /* Only do timeout if greater than 0 */ if (to > 0) { - tt = getsecs() + to; + u_long i = 0; + time_t tt = getsecs() + to; #ifdef DEBUG if (debug > 2) printf ("readline: timeout(%d) at %u\n", to, tt); #endif - while (getsecs() < tt && !cnischar()) - ; + /* check for timeout expiration less often + (for some very constrained archs) */ + while (!cnischar()) + if (!(i++ % 1000) && (getsecs() >= tt)) + break; if (!cnischar()) { strncpy(buf, "boot", 5); |