glibc/sysdeps/mach/hurd/htl/pt-mutex-consistent.c
Paul Eggert 2b778ceb40 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
2021-01-02 12:17:34 -08:00

48 lines
1.5 KiB
C

/* pthread_mutex_consistent. Hurd version.
Copyright (C) 2016-2021 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; if not, see
<https://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <stdlib.h>
#include <assert.h>
#include <pt-internal.h>
#include "pt-mutex.h"
#include <hurdlock.h>
int
pthread_mutex_consistent (pthread_mutex_t *mtxp)
{
int ret = EINVAL;
unsigned int val = mtxp->__lock;
if ((mtxp->__flags & PTHREAD_MUTEX_ROBUST) != 0
&& (val & LLL_DEAD_OWNER) != 0
&& atomic_compare_and_exchange_bool_acq (&mtxp->__lock,
__getpid () | LLL_WAITERS,
val) == 0)
{
/* The mutex is now ours, and it's consistent. */
mtxp->__owner_id = _pthread_self ()->thread;
mtxp->__cnt = 1;
ret = 0;
}
return ret;
}
weak_alias (pthread_mutex_consistent, pthread_mutex_consistent_np)