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nptl: Replace pthread_getcpuclockid with Linux implementation

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Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer 2021-05-17 09:59:14 +02:00
parent 8f72bed1aa
commit e948be4db3
2 changed files with 6 additions and 60 deletions
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24
nptl/pthread_getcpuclockid.c
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@ -1,4 +1,5 @@
/* Copyright (C) 2000-2021 Free Software Foundation, Inc.
/* pthread_getcpuclockid -- Get POSIX clockid_t for a pthread_t. Linux version
Copyright (C) 2000-2021 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
@ -19,6 +20,7 @@
#include <pthreadP.h>
#include <sys/time.h>
#include <tls.h>
#include <kernel-posix-cpu-timers.h>
int
@ -31,24 +33,10 @@ pthread_getcpuclockid (pthread_t threadid, clockid_t *clockid)
/* Not a valid thread handle. */
return ESRCH;
#ifdef CLOCK_THREAD_CPUTIME_ID
/* We need to store the thread ID in the CLOCKID variable together
with a number identifying the clock. We reserve the low 3 bits
for the clock ID and the rest for the thread ID. This is
problematic if the thread ID is too large. But 29 bits should be
fine.
/* The clockid_t value is a simple computation from the TID. */
If some day more clock IDs are needed the ID part can be
enlarged. The IDs are entirely internal. */
if (pd->tid >= 1 << (8 * sizeof (*clockid) - CLOCK_IDFIELD_SIZE))
return ERANGE;
/* Store the number. */
*clockid = CLOCK_THREAD_CPUTIME_ID | (pd->tid << CLOCK_IDFIELD_SIZE);
const clockid_t tidclock = MAKE_THREAD_CPUCLOCK (pd->tid, CPUCLOCK_SCHED);
*clockid = tidclock;
return 0;
#else
/* We don't have a timer for that. */
return ENOENT;
#endif
}

42
sysdeps/unix/sysv/linux/pthread_getcpuclockid.c
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@ -1,42 +0,0 @@
/* pthread_getcpuclockid -- Get POSIX clockid_t for a pthread_t. Linux version
Copyright (C) 2000-2021 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
modify it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, see <https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthreadP.h>
#include <sys/time.h>
#include <tls.h>
#include <kernel-posix-cpu-timers.h>
int
pthread_getcpuclockid (pthread_t threadid, clockid_t *clockid)
{
struct pthread *pd = (struct pthread *) threadid;
/* Make sure the descriptor is valid. */
if (INVALID_TD_P (pd))
/* Not a valid thread handle. */
return ESRCH;
/* The clockid_t value is a simple computation from the TID. */
const clockid_t tidclock = MAKE_THREAD_CPUCLOCK (pd->tid, CPUCLOCK_SCHED);
*clockid = tidclock;
return 0;
}