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[BZ #2832, BZ #2987]

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2006-06-08  Joseph Myers  <jsm28@gcc.gnu.org>
	[BZ #2832]
	* math/gen-libm-test.pl (clean_up_number): Do not remove trailing
	0s from integers.

2006-08-13  Ulrich Drepper  <drepper@redhat.com>

	[BZ #2987]
	* sysdeps/unix/sysv/linux/clock_settime.c: Add code to use syscall
	for CPU clocks.
	* sysdeps/unix/clock_settime.c: Add support for platform-specific
	setting of CPU clocks.
This commit is contained in:
Ulrich Drepper
2006-08-13 08:21:10 +00:00
parent 45698414d3
commit f99ed76079
4 changed files with 140 additions and 47 deletions
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92
sysdeps/unix/clock_settime.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
/* Copyright (C) 1999-2004, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -36,6 +36,43 @@ extern void __pthread_clock_settime (clockid_t clock_id, hp_timing_t offset)
#endif
#if HP_TIMING_AVAIL
static int
hp_timing_settime (clockid_t clock_id, const struct timespec *tp)
{
hp_timing_t tsc;
hp_timing_t usertime;
/* First thing is to get the current time. */
HP_TIMING_NOW (tsc);
if (__builtin_expect (freq == 0, 0))
{
/* This can only happen if we haven't initialized the `freq'
variable yet. Do this now. We don't have to protect this
code against multiple execution since all of them should lead
to the same result. */
freq = __get_clockfreq ();
if (__builtin_expect (freq == 0, 0))
/* Something went wrong. */
return -1;
}
/* Convert the user-provided time into CPU ticks. */
usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull;
/* Determine the offset and use it as the new base value. */
if (clock_id == CLOCK_PROCESS_CPUTIME_ID
|| __pthread_clock_settime == NULL)
GL(dl_cpuclock_offset) = tsc - usertime;
else
__pthread_clock_settime (clock_id, tsc - usertime);
return 0;
}
#endif
/* Set CLOCK to value TP. */
int
clock_settime (clockid_t clock_id, const struct timespec *tp)
@ -70,55 +107,22 @@ clock_settime (clockid_t clock_id, const struct timespec *tp)
#endif
default:
#if HP_TIMING_AVAIL
if ((clock_id & ((1 << CLOCK_IDFIELD_SIZE) - 1))
!= CLOCK_THREAD_CPUTIME_ID)
#ifdef SYSDEP_SETTIME_CPU
SYSDEP_SETTIME_CPU;
#endif
#ifndef HANDLED_CPUTIME
# if HP_TIMING_AVAIL
if (CPUCLOCK_WHICH (clock_id) == CLOCK_PROCESS_CPUTIME_ID
|| CPUCLOCK_WHICH (clock_id) == CLOCK_THREAD_CPUTIME_ID)
retval = hp_timing_settime (clock_id, tp);
else
# endif
{
__set_errno (EINVAL);
retval = -1;
break;
}
#if HP_TIMING_AVAIL
/* FALLTHROUGH. */
case CLOCK_PROCESS_CPUTIME_ID:
{
hp_timing_t tsc;
hp_timing_t usertime;
/* First thing is to get the current time. */
HP_TIMING_NOW (tsc);
if (__builtin_expect (freq == 0, 0))
{
/* This can only happen if we haven't initialized the `freq'
variable yet. Do this now. We don't have to protect this
code against multiple execution since all of them should
lead to the same result. */
freq = __get_clockfreq ();
if (__builtin_expect (freq == 0, 0))
{
/* Something went wrong. */
retval = -1;
break;
}
}
/* Convert the user-provided time into CPU ticks. */
usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull;
/* Determine the offset and use it as the new base value. */
if (clock_id == CLOCK_PROCESS_CPUTIME_ID
|| __pthread_clock_settime == NULL)
GL(dl_cpuclock_offset) = tsc - usertime;
else
__pthread_clock_settime (clock_id, tsc - usertime);
retval = 0;
}
break;
#endif
break;
}
return retval;