sysdeps/mach/htl/pt-spin.c

   1 /* Spin locks.  Mach version.
   2    Copyright (C) 2002-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If
  17    not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include <machine-lock.h>
  20
  21 /* In glibc.  */
  22 extern void __spin_lock_solid (__spin_lock_t *lock);
  23
  24 /* Lock the spin lock object LOCK.  If the lock is held by another
  25    thread spin until it becomes available.  */
  26 int
  27 _pthread_spin_lock (__spin_lock_t *lock)
  28 {
  29   __spin_lock_solid (lock);
  30   return 0;
  31 }