nptl/pthread_spin_init.c

   1 /* pthread_spin_init -- initialize a spin lock.  Generic version.
   2    Copyright (C) 2003-2022 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include "pthreadP.h"
  20 #include <shlib-compat.h>
  21
  22 int
  23 __pthread_spin_init (pthread_spinlock_t *lock, int pshared)
  24 {
  25   /* Relaxed MO is fine because this is an initializing store.  */
  26   atomic_store_relaxed (lock, 0);
  27   return 0;
  28 }
  29 versioned_symbol (libc, __pthread_spin_init, pthread_spin_init, GLIBC_2_34);
  30
  31 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
  32 compat_symbol (libpthread, __pthread_spin_init, pthread_spin_init, GLIBC_2_2);
  33 #endif