From ef4009734b84903615be28b38638c166e5455692 Mon Sep 17 00:00:00 2001 From: Maxim Kuvyrkov Date: Wed, 15 Aug 2012 16:29:06 -0700 Subject: Add generic versions of pthread_spin_lock and pthread_spin_trylock. --- nptl/pthread_spin_trylock.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 nptl/pthread_spin_trylock.c (limited to 'nptl/pthread_spin_trylock.c') diff --git a/nptl/pthread_spin_trylock.c b/nptl/pthread_spin_trylock.c new file mode 100644 index 0000000..db9372c --- /dev/null +++ b/nptl/pthread_spin_trylock.c @@ -0,0 +1,27 @@ +/* pthread_spin_trylock -- trylock a spin lock. Generic version. + Copyright (C) 2012 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 + . */ + +#include +#include +#include "pthreadP.h" + +int +pthread_spin_trylock (pthread_spinlock_t *lock) +{ + return atomic_exchange_acq (lock, 1) ? EBUSY : 0; +} -- cgit v1.1