2021-08-11 18:16:51 +00:00
|
|
|
/* Returns whether Priority Inheritance support CLOCK_MONOTONIC.
|
2024-01-01 18:12:26 +00:00
|
|
|
Copyright (C) 2021-2024 Free Software Foundation, Inc.
|
2021-08-11 18:16:51 +00:00
|
|
|
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 <support/xthread.h>
|
|
|
|
|
#include <sys/syscall.h>
|
|
|
|
|
#include <unistd.h>
|
|
|
|
|
|
|
|
|
|
bool
|
|
|
|
|
support_mutex_pi_monotonic (void)
|
|
|
|
|
{
|
|
|
|
|
#ifdef __linux__
|
|
|
|
|
# ifndef __NR_futex
|
|
|
|
|
# define __NR_futex __NR_futex_time64
|
|
|
|
|
# endif
|
|
|
|
|
int r = syscall (__NR_futex, &(unsigned int){0}, 13 /* FUTEX_LOCK_PI2 */,
|
|
|
|
|
0, NULL);
|
|
|
|
|
return r == 0;
|
|
|
|
|
#else
|
|
|
|
|
return false;
|
|
|
|
|
#endif
|
|
|
|
|
}
|
