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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

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This commit is contained in:
Ulrich Drepper
2004-12-22 20:10:10 +00:00
parent 0ecb606cb6
commit a334319f65
6215 changed files with 304673 additions and 494300 deletions
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123
sysdeps/unix/clock_gettime.c
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@@ -1,5 +1,4 @@
/* clock_gettime -- Get the current time from a POSIX clockid_t. Unix version.
Copyright (C) 1999-2004, 2005 Free Software Foundation, Inc.
/* Copyright (C) 1999, 2000, 2001, 2002, 2003 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
@@ -36,99 +35,89 @@ static hp_timing_t freq;
extern int __pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq,
struct timespec *tp)
__attribute__ ((__weak__));
static int
hp_timing_gettime (clockid_t clock_id, struct timespec *tp)
{
hp_timing_t 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;
}
if (clock_id != CLOCK_PROCESS_CPUTIME_ID
&& __pthread_clock_gettime != NULL)
return __pthread_clock_gettime (clock_id, freq, tp);
/* Get the current counter. */
HP_TIMING_NOW (tsc);
/* Compute the offset since the start time of the process. */
tsc -= GL(dl_cpuclock_offset);
/* Compute the seconds. */
tp->tv_sec = tsc / freq;
/* And the nanoseconds. This computation should be stable until
we get machines with about 16GHz frequency. */
tp->tv_nsec = ((tsc % freq) * UINT64_C (1000000000)) / freq;
return 0;
}
#endif
static inline int
realtime_gettime (struct timespec *tp)
{
struct timeval tv;
int retval = gettimeofday (&tv, NULL);
if (retval == 0)
/* Convert into `timespec'. */
TIMEVAL_TO_TIMESPEC (&tv, tp);
return retval;
}
/* Get current value of CLOCK and store it in TP. */
int
clock_gettime (clockid_t clock_id, struct timespec *tp)
{
int retval = -1;
struct timeval tv;
switch (clock_id)
{
#define HANDLE_REALTIME \
do { \
struct timeval tv; \
retval = gettimeofday (&tv, NULL); \
if (retval == 0) \
/* Convert into `timespec'. */ \
TIMEVAL_TO_TIMESPEC (&tv, tp); \
} while (0)
#ifdef SYSDEP_GETTIME
SYSDEP_GETTIME;
#endif
#ifndef HANDLED_REALTIME
case CLOCK_REALTIME:
retval = gettimeofday (&tv, NULL);
if (retval == 0)
TIMEVAL_TO_TIMESPEC (&tv, tp);
HANDLE_REALTIME;
break;
#endif
default:
#ifdef SYSDEP_GETTIME_CPU
SYSDEP_GETTIME_CPU;
#endif
#if HP_TIMING_AVAIL
if ((clock_id & ((1 << CLOCK_IDFIELD_SIZE) - 1))
== CLOCK_THREAD_CPUTIME_ID)
retval = hp_timing_gettime (clock_id, tp);
else
!= CLOCK_THREAD_CPUTIME_ID)
#endif
__set_errno (EINVAL);
break;
{
__set_errno (EINVAL);
break;
}
#if HP_TIMING_AVAIL && !defined HANDLED_CPUTIME
#if HP_TIMING_AVAIL
/* FALLTHROUGH. */
case CLOCK_PROCESS_CPUTIME_ID:
retval = hp_timing_gettime (clock_id, tp);
break;
{
hp_timing_t 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. */
break;
}
if (clock_id != CLOCK_PROCESS_CPUTIME_ID
&& __pthread_clock_gettime != NULL)
{
retval = __pthread_clock_gettime (clock_id, freq, tp);
break;
}
/* Get the current counter. */
HP_TIMING_NOW (tsc);
/* Compute the offset since the start time of the process. */
tsc -= GL(dl_cpuclock_offset);
/* Compute the seconds. */
tp->tv_sec = tsc / freq;
/* And the nanoseconds. This computation should be stable until
we get machines with about 16GHz frequency. */
tp->tv_nsec = ((tsc % freq) * UINT64_C (1000000000)) / freq;
retval = 0;
}
break;
#endif
}
return retval;
}
librt_hidden_def (clock_gettime)