about summary refs log tree commit diff
path: root/sysdeps/s390/nptl/pthread_spin_unlock.c
blob: 54e73785516f89f2ed63eddb7d972f4d44628942 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.

   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
   <http://www.gnu.org/licenses/>.  */

/* Ugly hack to avoid the declaration of pthread_spin_init.  */
#define pthread_spin_init pthread_spin_init_XXX
#include "pthreadP.h"
#undef pthread_spin_init

int
pthread_spin_unlock (pthread_spinlock_t *lock)
{
  __asm__ __volatile__ ("   xc  %O0(4,%R0),%0\n"
			"   bcr 15,0"
			: "=Q" (*lock) : "m" (*lock) : "cc" );
  return 0;
}
strong_alias (pthread_spin_unlock, pthread_spin_init)