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Since CLK_TCK is now a macro expanding into a function call, cache its

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output instead of using it willy nilly.
This commit is contained in:
perry 2002-06-23 20:21:08 +00:00
parent 25e1b60346
commit 25992495dc
1 changed files with 12 additions and 4 deletions
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16
lib/libc/gen/times.c
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@ -1,4 +1,4 @@
/* $NetBSD: times.c,v 1.11 2000/01/22 22:19:13 mycroft Exp $ */
/* $NetBSD: times.c,v 1.12 2002/06/23 20:21:08 perry Exp $ */
/*-
* Copyright (c) 1990, 1993
@ -38,7 +38,7 @@
#if 0
static char sccsid[] = "@(#)times.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: times.c,v 1.11 2000/01/22 22:19:13 mycroft Exp $");
__RCSID("$NetBSD: times.c,v 1.12 2002/06/23 20:21:08 perry Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
@ -60,7 +60,7 @@ __weak_alias(times,_times)
* Convert usec to clock ticks; could do (usec * CLK_TCK) / 1000000,
* but this would overflow if we switch to nanosec.
*/
#define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
#define CONVTCK(r) (r.tv_sec * clk_tck + r.tv_usec / (1000000 / clk_tck))
clock_t
times(tp)
@ -68,9 +68,17 @@ times(tp)
{
struct rusage ru;
struct timeval t;
static long clk_tck;
_DIAGASSERT(tp != NULL);
/*
* we use a local copy of CLK_TCK because it expands to a
* moderately expensive function call.
*/
if (clk_tck == 0)
clk_tck = CLK_TCK;
if (getrusage(RUSAGE_SELF, &ru) < 0)
return ((clock_t)-1);
tp->tms_utime = CONVTCK(ru.ru_utime);