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As a temporary measure, protect microtime() with a simple lock. 

XXX Needs to be rewritten from scratch.
This commit is contained in:
thorpej 2000-11-19 19:16:44 +00:00
parent 4a0283d9f0
commit 69a3a857be
1 changed files with 13 additions and 3 deletions
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16
sys/arch/alpha/alpha/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.221 2000/09/24 12:32:32 jdolecek Exp $ */
/* $NetBSD: machdep.c,v 1.222 2000/11/19 19:16:44 thorpej Exp $ */
/*-
* Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
@ -73,7 +73,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.221 2000/09/24 12:32:32 jdolecek Exp $");
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.222 2000/11/19 19:16:44 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -1903,13 +1903,21 @@ remrunqueue(p)
* to which tvp points. Unfortunately, we can't read the hardware registers.
* We guarantee that the time will be greater than the value obtained by a
* previous call.
*
* XXX PLEASE REWRITE ME TO USE THE CYCLE COUNTER AND DEAL WITH
* XXX MULTIPLE CPUs IN A SANE WAY!
*/
void
microtime(tvp)
register struct timeval *tvp;
{
int s = splclock();
static struct timeval lasttime;
static struct simplelock microtime_slock =
SIMPLELOCK_INITIALIZER;
int s;
s = splclock();
simple_lock(&microtime_slock);
*tvp = time;
#ifdef notdef
@ -1926,6 +1934,8 @@ microtime(tvp)
tvp->tv_usec -= 1000000;
}
lasttime = *tvp;
simple_unlock(&microtime_slock);
splx(s);
}