diff options
Diffstat (limited to 'ports/sysdeps/arm/nptl/pthread_spin_lock.c')
-rw-r--r-- | ports/sysdeps/arm/nptl/pthread_spin_lock.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/ports/sysdeps/arm/nptl/pthread_spin_lock.c b/ports/sysdeps/arm/nptl/pthread_spin_lock.c new file mode 100644 index 0000000000..3a23bd31a5 --- /dev/null +++ b/ports/sysdeps/arm/nptl/pthread_spin_lock.c @@ -0,0 +1,29 @@ +/* Copyright (C) 2008 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 <atomic.h> +#include "pthreadP.h" + +int +pthread_spin_lock (pthread_spinlock_t *lock) +{ + while (atomic_compare_and_exchange_val_acq (lock, 1, 0) != 0) + while (*lock != 0) + ; + + return 0; +} |