glibc/nptl/pthread_getcpuclockid.c
Adhemerval Zanella 9b5e138f2b linux: Avoid shifting a negative signed on POSIX timer interface
The current macros uses pid as signed value, which triggers a compiler
warning for process and thread timers.  Replace MAKE_PROCESS_CPUCLOCK
with static inline function that expects the pid as unsigned.  These
are similar to what Linux does internally.

Checked on x86_64-linux-gnu.
Reviewed-by: Arjun Shankar <arjun@redhat.com>
2022-10-20 10:19:08 -03:00

50 lines
1.7 KiB
C

/* pthread_getcpuclockid -- Get POSIX clockid_t for a pthread_t. Linux version
Copyright (C) 2000-2022 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>
#include <shlib-compat.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;
}
versioned_symbol (libc, __pthread_getcpuclockid, pthread_getcpuclockid,
GLIBC_2_34);
#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
compat_symbol (libpthread, __pthread_getcpuclockid, pthread_getcpuclockid,
GLIBC_2_2);
#endif