diff options
Diffstat (limited to 'sysdeps/s390/nptl/pthread_spin_lock.c')
-rw-r--r-- | sysdeps/s390/nptl/pthread_spin_lock.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/sysdeps/s390/nptl/pthread_spin_lock.c b/sysdeps/s390/nptl/pthread_spin_lock.c new file mode 100644 index 0000000000..d03bdaf3e2 --- /dev/null +++ b/sysdeps/s390/nptl/pthread_spin_lock.c @@ -0,0 +1,33 @@ +/* Copyright (C) 2003-2014 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/>. */ + +#include "pthreadP.h" + +int +pthread_spin_lock (lock) + pthread_spinlock_t *lock; +{ + int oldval; + + __asm __volatile ("0: lhi %0,0\n" + " cs %0,%2,%1\n" + " jl 0b" + : "=&d" (oldval), "=Q" (*lock) + : "d" (1), "m" (*lock) : "cc" ); + return 0; +} |