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glibc  2.9
pthread_spin_unlock.c
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00001 /* Copyright (C) 2003 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 /* Ugly hack to avoid the declaration of pthread_spin_init.  */
00021 #define pthread_spin_init pthread_spin_init_XXX
00022 #include "pthreadP.h"
00023 #undef pthread_spin_init
00024 
00025 int
00026 pthread_spin_unlock (pthread_spinlock_t *lock)
00027 {
00028   __asm __volatile ("   xc  %O0(4,%R0),%0\n"
00029                   "   bcr 15,0"
00030                   : "=Q" (*lock) : "m" (*lock) : "cc" );
00031   return 0;
00032 }
00033 strong_alias (pthread_spin_unlock, pthread_spin_init)