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Zack Weinberg <zack@codesourcery.com> Daniel Jacobowitz <dan@codesourcery.com> * sysdeps/arm/nptl/pthread_spin_lock.S, sysdeps/arm/nptl/pthread_spin_trylock.S: Delete. * sysdeps/arm/nptl/pthread_spin_lock.c, sysdeps/arm/nptl/pthread_spin_trylock.c: New files using atomic_compare_and_exchange_val_acq to take spinlocks. * sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h (lll_trylock, lll_cond_trylock): Use atomic_compare_and_exchange_val_acq. (__lll_trylock, __lll_cond_trylock): Delete. * sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h (atomic_exchange_acq): Delete. (atomic_full_barrier): Define. (__arch_compare_and_exchange_val_32_acq): Use named operands. * sysdeps/unix/sysv/linux/arm/eabi/configure.in: Update arch_minimum_kernel to 2.6.16. * sysdeps/unix/sysv/linux/arm/eabi/configure: Regenerated.
28 lines
1.0 KiB
C
28 lines
1.0 KiB
C
/* Copyright (C) 2008 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <atomic.h>
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#include "pthreadP.h"
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int
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pthread_spin_trylock (pthread_spinlock_t *lock)
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{
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return atomic_compare_and_exchange_val_acq (lock, 1, 0) ? EBUSY : 0;
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}
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